Patent Application
20120022054
The present invention is related to novel substituted aryl derivatives, pharmaceutical compositions comprising the same, processes for the preparation of said derivatives and uses of said compositions. Particularly, the present invention relates to pharmaceutical compositions that include substituted aryl derivatives of the invention, and their use in the treatment or the prevention of viral disorders, including HIV.
The Acquired Immuno Deficiency Syndrome (AIDS) is a disease due to infection by the Human Immunodeficiency Virus. AIDS is a global epidemic with virtually every country in the world reporting cases.
Sexual contact is the major mode of transmission of HIV worldwide. The virus can also be transmitted via blood or blood products and infected mothers can transmit HIV to their infants perinatally and as early as the first and second trimester of pregnancy. The virus can also be transmitted from the mother to infant via breast feeding. The prevalence of HIV infection among intravenous drug users is exceptionally high.
The clinical manifestations of HIV infection range from an asymptomatic state to severe disease. The majority of individuals experience no recognizable symptoms upon initial infection but some patients suffer from acute illness about three to six weeks after primary infection. This acute illness is characterized by fever, rigors, arthralgias, myalgias, maculopapulor rash, urticaria, abdominal cramps, diarrhea and aseptic meningitis.
Seroconversion generally occurs between 8 to 12 weeks after infection. Neurologic disease is common in HIV-infected individuals, the most common being encephalopathy or AIDS dementia complex.
UNAIDS estimates that there are around 33 millions HIV-infected patients worldwide. Although there are presently more than 25 anti-HIV drugs approved to treat HIV infected patients, a constant flow of new drugs is essential as the virus mutates rapidly and becomes drug resistant. It is estimated that 6-10% of patients under treatment become multi-resistant and are at strong risk of complete therapeutic failure.
Currently HIV infected patients are treated with Highly Active Anti Retroviral Therapies that rely on a combination of several drugs belonging to different classes. Up to 2003, all approved anti-HIV drugs were inhibitors of the catalytic activity of two viral enzymes, Reverse transcriptase (RT) inhibitors and Protease (PR) inhibitors. Reverse Transcriptase inhibitors include two different classes, Nucleoside/Nucleotide RT Inhibitors (NRTI) and Non Nucleoside RT Inhibitors (NNRTI). In 2003, a new class of Anti-retroviral drug (ARV), Fusion inhibitor (Enfuvirtide) was introduced (Cervia et al, Clin Infect Dis. 2003 Oct. 15; 37(8):1102-6, 2003). And lately, in 2007, two other classes of ARV were approved, Entry inhibitors (Maraviroc) targeting the CCR5 co-receptor, and Integrase inhibitors (Raltegravir) (Hughes et al, J. Infect. 2008 July; 57(1):1-10.). Although these three novel drugs were very useful to treat patients in therapeutic failure because of multiresistance to RT and PR inhibitors, resistance mutations against these drugs have been already reported.
Although the development of these potent anti-HIV drugs, has allowed HIV-infected people to live longer and to benefit of a higher quality of life, it is clear that these drugs do not cure the HIV infection. Moreover, their prolonged use often results in significant toxicity and in the emergence of drug-resistant viruses. Importantly, the ability of HIV to establish latent reservoirs early in the course of infection ensures the persistence of the virus even in the face of intensive drug therapy and vigorous antiviral immune response. Thus, there is a continuous need for the development of novel anti-HIV therapies to overcome the problems of resistance to the present drugs and to improve treatment efficiency (Daar et al, Top HIV Med. 2008 October-November; 16(4):110-6).
One of the main characteristic of HIV, like other retroviruses is its ability to integrate in the genomic DNA of the infected host cells. Integration of HIV is one of the important steps of the HIV replication cycle that is required for effective expression, replication and spreading of HIV. One way to inhibit integration of HIV is, to inhibit the catalytic activity of Integrase as Integrase inhibitors like raltegravir and other anti-Integrase reported compounds that target the catalytic activity of Integrase (De Clercq et al, Expert Opin Emerg Drugs 2008 September; 13(3):393-416.). Mutations conferring resistance to these Integrase inhibitors have been already reported.
The compounds of the invention are inhibitors of HIV replication as assessed by single cycle and multiple cycle of HIV infection of target cells in vitro, as described in the examples below.
These compounds are thus useful for treating or preventing viral diseases or disorders, such as HIV infection and infection by other viral agents such as HCV.
Close structurally-related compounds are disclosed in U.S. Pat. No. 4,540,703, EP 35046, JP 07041459, WO 93/14072, JP 63313773, JP 62178963, JP 59027803. However, none of these documents is concerned with anti-HIV activity.
By contrast, the compounds of the invention are HIV replication inhibitors, and are thus useful for treating or preventing viral diseases or disorders, such as HIV infection, by inhibiting the replication cycle of HIV and/or other viral agents in human cells.
According to a first aspect, the present invention provides compounds of formula (I)
wherein:
each R3, identical or different, represents a H atom or a group chosen from -alkyl, -aryl, -alkylaryl, —CN, —NO2, perfluoroalkyl-, perfluoroalkoxy-, polyfluoroalkyl-, polyfluoroalkoxy-, —OR, —NRR′, ═O, —C(═O)R, —C(═O)NRR′, —C(═O)OR, —S(O)qR, —OC(═O)R;
or a R3 form with R5 a N-containing heterocyle or heteroaryl;
R4 represents an aryl, heteroaryl, cycloalkyl, saturated or unsaturated heterocycle, said aryl, heteroaryl, cycloalkyl or heterocycle being optionally fused with an aryl, heteroaryl, saturated or unsaturated cycloalkyl or heterocyclic ring and said optionally fused aryl, heteroaryl, cycloalkyl or heterocyle being optionally substituted by one or more identical or different substituent(s) chosen from:
X represents a group chosen from —CRR′—, —NT-, —O—, —S(O)q—, —C(═O)—, —U—, where T represent a group chosen from H, aryl, cycloalkyl or alkyl optionally substituted by OH, heterocycle, or T may represent a C2 or C3 alkylene or alkenylene chain linked with a member of
to form with the N atom to which it is attached a 5 or 6 membered N-containing heteroaryl or saturated or unsaturated heterocycle fused with said
where U represents an N and optionally O comprising 5 or 6 membered heteroaryl optionally substituted by one or more alkyl group;
each Y, identical or different, represents a hydrogen atom or a OR group;
represents a monocyclic aryl, heteroaryl or unsaturated heterocycle; m is an integer comprised between 1 and 5, provided that when
comprises one or more heteroatom, m may be equal to 0;
n is 2 or 3;
where R, R′ identical or different, independently represent a hydrogen atom or an -alkyl, -aryl;
p is 0 or 1;
q is 0, 1 or 2;
as well as their racemates, stereoisomers or pharmaceutically acceptable salts,
with the exception of the following compounds:
the compounds where
is a tetrazol, X is S, n is 2, R6 is H, R1 and R2 form together a C═O with the carbon atom to which they are attached; and
the compounds where R4 is 1H-pyrazole;
the compounds of formulae:
The present invention also encompasses the following preferred embodiments or any of their combination:
X represents a group chosen from —U—, —CRR′—, —NT-, —O—, —S(O)q—, —C(═O)—, where the R of —NR— may be optionally linked with a R7 to form with the N atom to which it is attached a N-containing heterocycle fused with said
and/or
R4 represents an aryl or heteroaryl said aryl or heteroaryl group being optionally fused with an aryl, heteroaryl, saturated or unsaturated cycloalkyl or heterocyclic ring and said optionally fused aryl or heteroaryl being optionally substituted by one or more substituent(s) chosen from:
represents an aryl or heteroaryl, and/or
R1 is O and/or
R3 represents a H atom or a group chosen from -alkyl, -aryl, and/or
R4 represents an aryl optionally fused with an aryl, heteroaryl, or saturated heterocyclic ring and said optionally fused aryl being optionally substituted by one or more substituent(s) chosen from:
R5 represent a group -Alkyl, -Alkyl-OR, or -Cycloalkyl, each being optionally substituted by one or more substituents chosen from -polyfluoroalkyl groups, or, when p is 0, R5 may additionally represent an alkylene or alkenylene chain comprising 2 to 4 atoms, including C, N, O, so that R5 is linked to a ring member of R4 so as to form together with the N atom to which they are attached a N-containing heterocycle or heteroaryl optionally comprising one or more further heteroatom and optionally substituted by a group chosen from halogen atom, -alkyl, -aryl, -alkylaryl, —CN, —NO2, perfluoroalkyl-, perfluoroalkoxy-, polyfluoroalkyl-, polyfluoroalkoxy-, —OR, —NRR′, ═O, —C(═O)R, —C(═O)NRR′, —C(═O)OR, —S(O)qR, —OC(═O)R; and/or
R6 represents a H atom or a group chosen from —C(═O)NRR′, —C(═O)OR, and/or
R7, identical or different is independently chosen from Halogen atoms; —OR; —O—C(═O)R; —NR—C(═O)R′; —NR—S(O)q—R′; perfluoroalkyl; —C(═O)OR; —C(═O)Alkyl; —C(═O)Aryl; heteroaryl; —C(═O)—NRR′; —OAlkylAryl; polyfluoroalkyl-; or 2 R7 form together with the atoms to which they are attached an unsubstituted ring chosen from aryl, heteroaryl, or unsaturated heterocyclic ring fused with
and/or
X represents a group chosen from —CRR′—, —NT-, —S—, —S(O)—, —C(═O)—, —S(O)2—, and/or
Y represents a hydrogen atom, and/or
represents an aryl, and/or
U represents a five-membered N-containing heteroaryl;
n is 2, and/or
p is 1.
According to a particular embodiment, the compounds of the invention are those of formula (I) comprising one or more of the following embodiments or any of their combinations:
R1 is O; and/or
R3 represents a H atom; and/or
R4 represents an aryl, preferably phenyl, or heteroaryl, preferably pyridyl, optionally fused with an aryl such as phenyl, or heteroaryl such as pyridyle, and said optionally fused aryl or heteroaryl being optionally substituted by one or more identical or different substituent(s) chosen from:
adjacent to the N atom to which it is attached to form with said N atom a 5 or 6 membered N-containing heteroaryl or saturated or unsaturated heterocycle fused with said
and/or where U represents an 5 or 6 membered N— and optionally O— comprising heteroaryl optionally substituted by one or more alkyl group; and/or
each Y, identical or different, represents a hydrogen atom; and/or
represents a monocyclic aryl, such as phenyl; and/or
m is 1 or 2; and/or
n is 2; and/or
p is 0 or 1; and/or
q is 0 or 1 or 2; and/or
where R, R′ identical or different, independently represent a hydrogen atom or an -alkyl, -aryl;
as well as their racemates, stereoisomers or pharmaceutically acceptable salts
According to a more particular embodiment, the compounds of the invention are those of formula (I) wherein:
R3 represents a H atom;
R4 represents an aryl, preferably phenyl, or heteroaryl, preferably pyridyl, optionally fused with an aryl such as phenyl, or heteroaryl such as pyridyle, and said optionally fused aryl or heteroaryl being optionally substituted by one or more identical or different substituent(s) chosen from:
adjacent to the N atom to which it is attached to form with said N atom a 5 or 6 membered N-containing heteroaryl or saturated or unsaturated heterocycle fused with said
where U represents an 5 or 6 membered N— and optionally O— comprising heteroaryl optionally substituted by one or more alkyl group;
each Y, identical or different, represents a hydrogen atom;
represents a monocyclic aryl, such as phenyl;
m is 1 or 2;
n is 2;
p is 0 or 1; and
q is 0 or 1 or 2;
where R, R′ identical or different, independently represent a hydrogen atom or an -alkyl, -aryl;
as well as their racemates, stereoisomers or pharmaceutically acceptable salts
According to a preferred aspect, the compounds of the invention are selected from the group consisting in:
More preferably, the compounds of the invention are chosen from:
The following compounds are also encompassed:
As used herein, the term “alkyl” refers to a branched or straight hydrocarbon chain of 1 to 8 carbon atoms, which is formed by the removal of one hydrogen atom. In certain preferred embodiments, the alkyl group contains from 1 to 6 carbon atoms. In other preferred embodiments, the alkyl group contains from 1 to 4 carbon atoms. A designation such as “C1-C4 alkyl” refers to an alkyl radical containing from 1 to 4 carbon atoms. Examples include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, t-butyl, pentyl, 2-methylpentyl, hexyl, 2-methylhexyl, 2,3-dimethylhexyl, heptyl, octyl, etc.
As used herein, the term “cycloalkyl” refers to an aromatic or non aromatic hydrocarbon mono, bi or multi cyclic ring of 3 to 10 carbon atoms formed by the removal of one hydrogen atom. A designation such as “C5-C7 cycloalkyl” refers to a cycloalkyl radical containing from 5 to 7 carbon atoms. Examples include cyclopropyl, cyclopentyl, cyclohexyl, cycloheptyl, adamantyl, etc. as well as the systems formed by their condensation or by the condensation with a phenyl group.
As used herein, the term “aromatic” or “aryl” in aryl or heteroaryl refers to a cyclic carbocyclic aryl or heteroaryl system as defined herein, which satisfies the Hückel (4n+2) rule and/or with a stability due to delocalization significantly greater than that of a hypothetic localized structure.
As used herein, the terms “heterocycle” or “heterocyclic” refer to a saturated, partially unsaturated or unsaturated, aromatic or non aromatic stable 3 to 14, preferably 5 to 10 membered mono, bi or multicyclic rings wherein at least one member of the ring is a hetero atom. Typically, heteroatoms include, but are not limited to, oxygen, nitrogen, sulfur, selenium, and phosphorus atoms. Preferable heteroatoms are oxygen, nitrogen and sulfur. The nitrogen and sulfur heteroatoms may be optionally oxidized, and the nitrogen may be optionally substituted in non-aromatic rings. The bonds connecting the endocyclic atoms of a heterocyclic group may be single, double, triple, or part of a fused aromatic moiety.
Heterocycles are intended to include non aromatic heterocyclic (“heterocyclyl”) and aromatic heterocyclic (“heteroaryl”) compounds.
Examples of heterocycles include, but are not limited to oxiranyl, aziridinyl, tetrahydrofuranyl, 1,2-dioxolanyl, 1,3-dioxolanyl, 1,4-dioxolanyl, tetrahydro-pyranyl, 1,2-dioxanyl, 1,3-dioxanyl, 1,4-dioxanyl, tetrahydro-thiophenyl, tetrahydrothiopyran, 1,2-di-thiolanyl, 1,3-dithiolanyl, 1,2-dithianyl, 1,3-dithianyl, 1,4-dithianyl, tetrahydrothiopyranyl, thiomorpholinyl, thiazolidinyl, oxiranyl, pyrrolidinyl, 2-pyrrolidinyl, pirazolidinyl, piperidyl, 4-piperidinyl, morpholino, morpholinyl, piperazinyl, imidazolidinyl, pyranyl, dihydrofuranyl, dihydropyranyl, imidazolinyl, pyrrolinyl, pirazolinyl, tetrahydropyridyl, dihydropyridyl, tetrahydropyrimidinyl, dihydrothiophenyl, dihydrothiopyranyl, furanyl, pyrrolyl, 2H-pyrrolyl, imidazolyl, pyrazolyl, thienyl, oxadiazolyl, 1,2,3-oxadiazolyl, 1,2,4-oxadiazolyl, 1,2,5-oxadiazolyl, 1,3,4-oxadiazolyl, oxazolyl, isoxazolyl, furazanyl, 1,2,3-thiadiazolyl, 1,2,4-thiadiazolyl, 1,2,5-thiadiazolyl, 1,3,4-thiadiazolyl, thiazolyl, isothiazolyl, pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, indolizinyl, indolyl, indazolyl, purinyl, quinolizinyl, quinolyl, isoquinolyl, phthalazinyl, naphthyridinyl, quinoxalinyl, quinazolinyl, cinnolinyl, pteridinyl, oxazolinyl, 6H-1,2,5-thiadiazinyl, 2H,6H-1,5,2-dithiazinyl, oxazolidinyl, piperidonyl, 6H-1,2,5-thiadiazinyl, thienothiazolyl, thienooxazolyl, thienoimidazolyl, triazinyl, 1,2,3-triazolyl, 1,2,4-triazolyl, 1,2,5-triazolyl, 1,3,4-triazolyl, and tetrazole, as well as the systems formed by their condensation or the condensation with a phenyl group. Suitable heterocycles are also disclosed in The Handbook of Chemistry and Physics, 76th Edition, CRC Press, Inc., 1995-1996, pages 2-25 to 2-26, the disclosure of which is hereby incorporated by reference.
Preferred heterocyclic groups formed with a nitrogen atom include, but are not limited to, pyrrolidinyl, pyrrolyl, pirazolyl, pirazolidinyl, piperazinyl, imidazolidinyl, pyrrolinyl, pirazolinyl, pyridyl, piperidyl, piperidino, morpholinyl, morpholino, thiomorpholino, N-methylpiperazinyl, indolyl, isoindolyl, imidazolyl, imidazolinyl, oxazoline, oxazole, triazole, thiazoline, thiazole, isothiazole, thiadiazoles, triazines, isoxazole, oxindole, indoxyl, pyrazole, pyrazolone, pyrimidine, pyrazine, quinoline, isoquinoline, and tetrazole groups.
Preferred heterocyclic groups formed with an oxygen atom include, but are not limited to, furan, tetrahydrofuran, pyran, benzofurans, isobenzofurans, and tetrahydropyran groups. Preferred heterocyclic groups formed with a sulfur atom include, but are not limited to, thiophene, thianaphthene, tetrahydrothiophene, tetrahydrothiapyran, and benzothiophenes.
Preferred non aromatic heterocyclic, herein called heterocyclyl groups include, but are not limited to oxiranyl, tetrahydrofuranyl, dioxolanyl, tetrahydropyranyl, dioxanyl, pyrrolidinyl, piperidyl, morpholinyl, imidazolidinyl, pyranyl, imidazolinyl, pyrrolinyl, pyrazolinyl.
Preferred aromatic heterocyclic, herein called heteroaryl groups include, but are not limited to, pyridyl, pyridyl-N-oxyde, pyrimidinyl, pyrrolyl, furanyl, thienyl, imidazolyl, triazolyl, tetrazolyl, quinolyl, isoquinolyl, benzoimidazolyl, thiazolyl, pyrazolyl, and benzothiazolyl groups.
As used herein, the “heterocyclyl” groups refer to a non aromatic saturated or unsaturated heterocyclic ring which is formed by removal of a hydrogen atom.
As used herein, the term “aryl” refers to an aromatic carbo, mono-, bi- or multicyclic hydrocarbon ring containing from 6 to 14, preferably 6 to 10 carbon atoms, which is formed by removal of one hydrogen atom. Examples include phenyl, naphthyl, indenyl, etc.
As used herein, the term “heteroaryl” refers to a 5 to 14, preferably 5 to 10 membered aromatic hetero, mono-, bi- or multicyclic ring, which is formed by removal of one hydrogen atom. Examples include pyrrolyl, pyridyl, pyrazolyl, thienyl, pyrimidinyl, pyrazinyl, tetrazolyl, indolyl, quinolinyl, purinyl, imidazolyl, thienyl, thiazolyl, benzothiazolyl, furanyl, benzofuranyl, 1,2,4-thiadiazolyl, isothiazolyl, triazoyl, tetrazolyl, isoquinolyl, benzothienyl, isobenzofuryl, pyrazolyl, carbazolyl, benzimidazolyl, isoxazolyl, etc.
“Alkyl”, “cycloalkyl”, “aryl”, “heteroaryl”, “heterocycle” refers also to the corresponding “alkylene”, “cycloalkylene”, “arylene”, “heteroarylene”, “heterocyclene” which are formed by the removal of two hydrogen atoms.
An “unsubstituted” ring as used herein means that said ring is devoid of any substituent, in particular ring members cannot represent
As used herein, “Hal” refers to a halogen atom, including fluoro, chloro, iodo, bromo.
As used herein, the term “subject” refers to a warm blooded animal such as a mammal, preferably a human, or a human child, which is afflicted with, or has the potential to be afflicted with one or more diseases and conditions described herein.
As used herein, a “therapeutically effective amount” refers to an amount of a compound of the present invention which is effective in reducing, eliminating, treating or controlling the symptoms of the herein-described diseases and conditions. The term “controlling” is intended to refer to all processes wherein there may be a slowing, interrupting, arresting, or stopping of the progression of the diseases and conditions described herein, but does not necessarily indicate a total elimination of all disease and condition symptoms, and is intended to include prophylactic treatment.
As used herein, the term “pharmaceutically acceptable” refers to those compounds, materials, compositions, and/or dosage forms which are, within the scope of sound medical judgment, suitable for contact with the tissues of human beings and animals without excessive toxicity, irritation, allergic response, or other problem complications commensurate with a reasonable benefit/risk ratio.
As used herein, “pharmaceutically acceptable salts” refer to derivatives of the disclosed compounds wherein the parent compound is modified by making acid or base salts thereof. The pharmaceutically acceptable salts include the conventional non-toxic salts or the quaternary ammonium salts of the parent compound formed, for example, from non-toxic inorganic or organic acids. For example, such conventional non-toxic salts include those derived from inorganic acids such as hydrochloric, sulfuric, sulfamic, phosphoric, nitric and the like; and the salts prepared from organic acids such as acetic, propionic, succinic, tartaric, citric, glutamic, benzoic, salicylic, toluenesulfonic, oxalic, and the like.
The pharmaceutically acceptable salts of the present invention can be synthesized from the parent compound which contains a basic or acidic moiety by conventional chemical methods. Generally, such salts can be prepared by reacting the free acid or base forms of these compounds with a stoichiometric amount of the appropriate base or acid in water or in an organic solvent, or in a mixture of the two. Generally, non-aqueous media like ether, ethyl acetate, ethanol, isopropanol, or acetonitrile are preferred. Lists of suitable salts are found in Remington's Pharmaceutical Sciences, 17th ed., Mack Publishing Company, Easton, Pa., 1985, p. 1418, the disclosure of which is hereby incorporated by reference.
As used herein, “pharmaceutically acceptable salts” refer to derivatives of the disclosed compounds wherein the parent compound is modified by making acid or base salts thereof. The pharmaceutically acceptable salts include the conventional non-toxic salts or the quaternary ammonium salts of the parent compound formed, for example, from non-toxic inorganic or organic acids. For example, such conventional non-toxic salts include those derived from inorganic acids such as hydrochloric, hydrobromic, sulfuric, sulfamic, phosphoric, nitric and the like; and the salts prepared from organic acids such as acetic, propanoic, succinic, tartaric, citric, methanesulfonic, benzenesulfonic, glucuronic, glutamic, benzoic, salicylic, toluenesulfonic, oxalic, fumaric, maleic, and the like. Further addition salts include ammonium salts such as tromethamine, meglumine, epolamine, etc., metal salts such as sodium, potassium, calcium, zinc or magnesium. Hydrochloride and oxalate salts are preferred.
The pharmaceutically acceptable salts of the present invention can be synthesized from the parent compound which contains a basic or acidic moiety by conventional chemical methods. Generally, such salts can be prepared by reacting the free acid or base forms of these compounds with a stoichiometric amount of the appropriate base or acid in water or in an organic solvent, or in a mixture of the two. Generally, non-aqueous media like ether, ethyl acetate, ethanol, isopropanol, or acetonitrile are preferred. Lists of suitable salts are found in Remington's Pharmaceutical Sciences, 17th ed., Mack Publishing Company, Easton, Pa., 1985, p. 1418, the disclosure of which is hereby incorporated by reference.
The compounds of the general formula (I) having geometrical and stereomers are also a part of the invention.
According to a further object, the present invention is also concerned with the process of preparation of the compounds of formula (I).
The compounds and process of the present invention may be prepared in a number of ways well known to those skilled in the art. The compounds can be synthesized, for example, by application or adaptation of the methods described below, or variations thereon as appreciated by the skilled artisan. The appropriate modifications and substitutions will be readily apparent and well known or readily obtainable from the scientific literature to those skilled in the art.
In particular, such methods can be found in R. C. Larock, Comprehensive Organic Transformations, VCH publishers, 1989.
It will be appreciated that the compounds of the present invention may contain one or more asymmetrically substituted carbon atoms, and may be isolated in optically active or racemic forms. Thus, all chiral, diastereomeric, racemic forms and all geometric isomeric forms of a structure are intended, unless the specific stereochemistry or isomeric form is specifically indicated. It is well known in the art how to prepare and isolate such optically active forms. For example, mixtures of stereomers may be separated by standard techniques including, but not limited to, resolution of racemic forms, normal, reverse-phase, and chiral chromatography, preferential salt formation, recrystallization, and the like, or by chiral synthesis either from chiral starting materials or by deliberate synthesis of target chiral centers.
Compounds of the present invention may be prepared by a variety of synthetic routes. The reagents and starting materials are commercially available, or readily synthesized by well-known techniques by one of ordinary skill in the arts. All substituents, unless otherwise indicated, are as previously defined.
In the reactions described hereinafter, it may be necessary to protect reactive functional groups, for example hydroxy, amino, imino, thio or carboxy groups, where these are desired in the final product, to avoid their unwanted participation in the reactions. Conventional protecting groups may be used in accordance with standard practice, for examples see T. W. Greene and P. G. M. Wuts in Protective Groups in Organic Chemistry, John Wiley and Sons, 1991; J. F. W. McOmie in Protective Groups in Organic Chemistry, Plenum Press, 1973.
Some reactions may be carried out in the presence of a base. There is no particular restriction on the nature of the base to be used in this reaction, and any base conventionally used in reactions of this type may equally be used here, provided that it has no adverse effect on other parts of the molecule. Examples of suitable bases include: sodium hydroxide, potassium carbonate, triethylamine, alkali metal hydrides, such as sodium hydride and potassium hydride; alkyllithium compounds, such as methyllithium and butyllithium; and alkali metal alkoxides, such as sodium methoxide and sodium ethoxide.
Usually, reactions are carried out in a suitable solvent. A variety of solvents may be used, provided that it has no adverse effect on the reaction or on the reagents involved. Examples of suitable solvents include: hydrocarbons, which may be aromatic, aliphatic or cycloaliphatic hydrocarbons, such as hexane, cyclohexane, methylcyclohexane, toluene and xylene; amides, such as N,N-dimethylformamide; alcohols such as ethanol and methanol and ethers, such as diethyl ether, methyl tert-butyl ether, methyl cyclopentyl ether and tetrahydrofuran.
The reactions can take place over a wide range of temperatures. In general, we find it convenient to carry out the reaction at a temperature of from −78° C. to 150° C. (more preferably from about room temperature to 100° C.). The time required for the reaction may also vary widely, depending on many factors, notably the reaction temperature and the nature of the reagents. However, provided that the reaction is effected under the preferred conditions outlined above, a period of up to 20 hours will usually suffice.
The compound thus prepared may be recovered from the reaction mixture by conventional means. For example, the compounds may be recovered by distilling off the solvent from the reaction mixture or, if necessary, after distilling off the solvent from the reaction mixture, pouring the residue into water followed by extraction with a water-immiscible organic solvent and distilling off the solvent from the extract. Additionally, the product can, if desired, be further purified by various well-known techniques, such as recrystallization, reprecipitation or the various chromatography techniques, notably column chromatography or preparative thin layer chromatography.
The process of preparation of a compound of formula (I) of the invention is another object of the present invention.
According to a first aspect, the process of preparation of the compounds of the invention of the formula (I) where R1 is O, can comprise the step of reacting a corresponding compound of formula (II) with a corresponding compound of formula (III), or precursors thereof:
where R7,
X, Y, R6, R5, R3, R4, m, n, p are defined as in formula (I) and Z is either a halogen atom or a OH group, optionally followed by the functionalization of the obtained compound, if precursors were used.
Generally, the coupling reaction is carried out in an organic, aprotic solvent, such as dichloromethane or DMF, at room temperature, optionally in the presence of coupling agents, such as DMAP and/or DCI and/or a base such as NaH or triethylamine.
The functionalization reaction may be carried out by application or adaptation of known methods.
According to a second aspect, the process of preparation of the compounds of the invention of the formula (I) where X represents a —NT- group can comprise the step of reacting a corresponding compound of formula (IV) with a corresponding compound of formula (V), or precursors thereof:
where R7,
X, Y, R6, R5, R1, R3, R4, T, m, n, p are defined as in formula (I) and Hal is a halogen atom, optionally followed by the functionalization of the obtained compound, if precursors were used.
Generally, the coupling reaction is carried out in a solvent, such as acetonitrile, at a temperature comprised between 50° C. and 150° C. in a microwave, in the presence of a reagent, such as KI.
According to a third aspect, compounds of the invention where X represents a —U— group can be obtained by reacting a corresponding compound of formula (VI) with a corresponding compound of formula (VII), or precursors thereof:
where R7,
Y, R6, R5, R1, R3, R4, U, m, n, p are defined as in formula (I) and Hal is a halogen atom, optionally followed by the functionalization of the obtained compound, if precursors were used.
Generally, the coupling reaction is carried out by a Suzuki reaction. Typical experimental conditions include the presence of a catalyst such as Pd(PPh3)4 in the presence of a base such as K2CO3, in a solvent such as methanol. Heating may be operated at a temperature comprised between 50° and 170° C., for instance in a microwave.
The compound of formula (VI) may be obtained by coupling a corresponding compound of formula (VIII) with a corresponding compound of formula (IX):
According to a fourth aspect, the process of the preparation of compounds of the invention where X represents a —U— group, U being an oxazole group, can comprise the step of cyclizing a corresponding compound of formula (X):
where R7,
Y, R6, m, n are defined as in formula (I) and Alkyl represents a C1-C6 alkyl, optionally followed by the functionalization of the obtained compound, if precursors were used.
Generally, the cyclization reaction may be carried out in the presence of reagents such as phosphorus pentoxide in an organic solvent such as chloroform, at a temperature comprised between room temperature and the boiling point of the reaction mixture.
The compound of formula (X) may be obtained by reacting a corresponding compound of formula (XI) with a corresponding compound of formula (XII):
According to a fifth aspect, the process of preparation of the compounds of the invention where X represents a O, —S(O)q— or —U— group can comprise the step of reacting a corresponding compound of formula (XIII) with a corresponding compound of formula (XIV), or precursors thereof:
where R7,
Y, R6, R5, R1, R3, R4, X, m, n, p are defined as in formula (I) and Hal is a halogen atom, optionally followed by the functionalization of the obtained compound, if precursors were used.
Generally, the coupling may be carried out in an organic solvent such as DMF, in the presence of a base, such as NaH or K2CO3, and at a temperature comprised between room temperature and the boiling point of the reaction mixture.
Precursor thereof is used herein to refer to compounds which differ from the indicated or desired compounds by the presence and/or absence of functions. Such functions may be introduced, transformed and/or omitted by common functionalization reactions, known from the skilled person, on the obtained product.
Said compounds of formula (II), (III), (IV), (V), (VII), (VIII), (IX), (XI), (XII), (XIII), (XIV) are commercially available or may be synthesized by applying or adapting any known method, such as those described in the examples.
The process of the invention may also comprise any prior or following step, if appropriate, and/or any combination of the above embodiments, if needed to obtain the desired compound.
The process of the invention also comprises the additional step of isolating said desired compound of formula (I).
According to a still further aspect, the present invention also provides pharmaceutical compositions comprising at least one compound of the present invention of formula (I) as defined below,
wherein:
each R3, identical or different, represents a H atom or a group chosen from -alkyl, -aryl, -alkylaryl, —CN, —NO2, perfluoroalkyl-, perfluoroalkoxy-, polyfluoroalkyl-, polyfluoroalkoxy-, —OR, —NRR′, ═O, —C(═O)R, —C(═O)NRR′, —C(═O)OR, —S(O)qR, —OC(═O)R;
or a R3 form with R5 a N-containing heterocyle or heteroaryl;
R4 represents an aryl, heteroaryl, cycloalkyl, saturated or unsaturated heterocycle, said aryl, heteroaryl, cycloalkyl or heterocycle being optionally fused with an aryl, heteroaryl, saturated or unsaturated cycloalkyl or heterocyclic ring and said optionally fused aryl, heteroaryl, cycloalkyl or heterocyle being optionally substituted by one or more identical or different substituent(s) chosen from:
X represents a group chosen from —CRR′—, —NT-, —O—, —S(O)q—, —C(═O)—, —U—, where T represent a group chosen from H, aryl, cycloalkyl or alkyl optionally substituted by OH, heterocycle, or T may represent a C2 or C3 alkylene or alkenylene chain linked with a member of
to form with the N atom to which it is attached a 5 or 6 membered N-containing heteroaryl or saturated or unsaturated heterocycle fused with said
where U represents an N and optionally O comprising 5 or 6 membered heteroaryl optionally substituted by one or more alkyl group;
each Y, identical or different, represents a hydrogen atom or a OR group;
represents a monocyclic aryl, heteroaryl or unsaturated heterocycle;
m is an integer comprised between 1 and 5, provided that when
comprises one or more heteroatom, m may be equal to 0;
n is 2 or 3;
where R, R′ identical or different, independently represent a hydrogen atom or an -alkyl, -aryl;
p is 0 or 1;
q is 0, 1 or 2;
as well as their racemates, stereoisomers or pharmaceutically acceptable salts,
with the exception of the following compounds:
is a tetrazol, X is S, n is 2, R6 is H, R1 and R2 form together a C═O with the carbon atom to which they are attached; and
and a pharmaceutically acceptable carrier.
According to a further object, the present invention also provides a compound of formula (I)
wherein:
each R3, identical or different, represents a H atom or a group chosen from -alkyl, -aryl, -alkylaryl, —CN, —NO2, perfluoroalkyl-, perfluoroalkoxy-, polyfluoroalkyl-, polyfluoroalkoxy-, —OR, —NRR′, ═O, —C(═O)R, —C(═O)NRR′, —C(═O)OR, —S(O)qR, —OC(═O)R; or a R3 form with R5 a N-containing heterocyle or heteroaryl;
R4 represents an aryl, heteroaryl, cycloalkyl, saturated or unsaturated heterocycle, said aryl, heteroaryl, cycloalkyl or heterocycle being optionally fused with an aryl, heteroaryl, saturated or unsaturated cycloalkyl or heterocyclic ring and said optionally fused aryl, heteroaryl, cycloalkyl or heterocyle being optionally substituted by one or more identical or different substituent(s) chosen from:
each R7, identical or different is independently chosen from Halogen atoms; —OR; —O—C(═O)R; —NR—C(═O)R′; —NR—S(O)q—R′; perfluoroalkyl; —C(═O)OR; —C(═O)Alkyl; —C(═O)Aryl; —C(═O)—NRR′; -AlkylAryl; —OAlkylAryl; -Alkyl; -Aryl; heteroaryl optionally substituted by alkyl; —CN; perfluoroalkoxy-; polyfluoroalkyl-; polyfluoroalkoxy-; ═O; —C(═O)R; —C(═O)NRR′; —S(O)qR; -Alkyl-NRR′; —S(O)qNRR′; —S(O)qAlkyl; -Alkyl-OR or 2 R7 form together with the atoms to which they are attached an unsubstituted ring chosen from aryl, heteroaryl, saturated or unsaturated cycloalkyl or heterocyclic ring fused with
X represents a group chosen from —CRR′—, —NT-, —O—, —S(O)q—, —C(═O)—, —U—, where T represent a group chosen from H, aryl, cycloalkyl or alkyl optionally substituted by OH, heterocycle, or T may represent a C2 or C3 alkylene or alkenylene chain linked with a member of
to form with the N atom to which it is attached a 5 or 6 membered N-containing heteroaryl or saturated or unsaturated heterocycle fused with said
where U represents an N and optionally O comprising 5 or 6 membered heteroaryl optionally substituted by one or more alkyl group;
each Y, identical or different, represents a hydrogen atom or a OR group;
represents an aryl, heteroaryl or unsaturated heterocycle;
m is an integer comprised between 1 and 5, provided that when
comprises one or more heteroatom, m may be equal to 0;
n is 2 or 3;
where R, R′ identical or different, independently represent a hydrogen atom or an -alkyl, -aryl;
p is 0 or 1;
q is 0, 1 or 2;
as well as their racemates, stereoisomers or pharmaceutically acceptable salts,
for treating and/or preventing viral infections.
According to a further object, the present invention also provides a compound of formula (I) as defined above for treating and/or preventing viral infections such as HCV and/or HIV infection, and/or disorders caused by retroviruses such as HIV and AIDS-related complex, persistent generalised lymphadenopathy (PGL), Kaposi's sarcoma, AIDS dementia complex (or AIDS related disorders), Avian sarcoma and leukosis viral group, Mammalian B-type viral group, Murine leukemia-related viral group, Human T-cell leukemia and bovine leukemia viral group, D-type viral group, Lentiviruses and Spumaviruses; and for example Rous sarcoma virus, mouse mammary tumor virus, Moloney murine leukemia virus, human T-cell leukemia virus, Mason-Pfizer monkey virus, human immunodeficiency virus, human foamy virus.
The compounds of the invention achieve their antiviral activity by either inhibiting integrase and/or reverse transcriptase.
The present invention also concerns the corresponding methods for inhibiting integration, treating and/or preventing viral infections and/or disorders, such as HIV and/or HCV infection in a subject in need thereof, said method comprising administering to said subject a therapeutically effective amount of a compound of formula (I) as defined above.
The identification of those subjects who are in need of treatment of herein-described diseases and conditions is well within the ability and knowledge of one skilled in the art. A clinician skilled in the art can readily identify, by the use of clinical tests, physical examination and medical/family history, those subjects who are in need of such treatment.
A therapeutically effective amount can be readily determined by the attending diagnostician, as one skilled in the art, by the use of conventional techniques and by observing results obtained under analogous circumstances. In determining the therapeutically effective amount, a number of factors are considered by the attending diagnostician, including, but not limited to: the species of subject; its size, age, and general health; the specific disease involved; the degree of involvement or the severity of the disease; the response of the individual subject; the particular compound administered; the mode of administration; the bioavailability characteristic of the preparation administered; the dose regimen selected; the use of concomitant medication; and other relevant circumstances.
The amount of a compound of formula (I), which is required to achieve the desired biological effect will vary depending upon a number of factors, including the dosage of the drug to be administered, the chemical characteristics (e.g., hydrophobicity) of the compounds employed, the potency of the compounds, the type of disease, the diseased state of the patient, and the route of administration.
In general terms, the compounds of this invention may be provided in an aqueous physiological buffer solution containing about 0.1 to 10% w/v compound for parenteral administration. Typical dose ranges are from about 1 μg/kg to about 1 g/kg of body weight per day; a preferred dose range is from about 0.01 mg/kg to 100 mg/kg of body weight per day. A preferred daily dose for adult humans includes about 25, 50, 100, 200 and 400 mg, and an equivalent dose in a human child. The preferred dosage of drug to be administered is likely to depend on such variables as the type and extent of progression of the disease or disorder, the overall health status of the particular patient, the relative biological efficacy of the compound selected, and formulation of the compound excipient, and its route of administration.
The compounds of the present invention are capable of being administered in unit dose forms, wherein the term “unit dose” means a single dose which is capable of being administered to a patient, and which can be readily handled and packaged, remaining as a physically and chemically stable unit dose comprising either the active compound itself, or as a pharmaceutically acceptable composition, as described hereinafter. As such, typical daily dose ranges are from about 0.1 to 100 mg/kg of body weight. By way of general guidance, unit doses for humans range from about 0.1 mg to about 1000 mg per day. Preferably the unit dose range is from about 1 to about 500 mg administered one to four times a day, and even more preferably from about 10 mg to about 300 mg, two times a day. Compounds provided herein can be formulated into pharmaceutical compositions by admixture with one or more pharmaceutically acceptable excipients. Such compositions may be prepared for use in oral administration, particularly in the form of tablets or capsules; or parenteral administration, particularly in the form of liquid solutions, suspensions or emulsions; or intranasally, particularly in the form of powders, nasal drops, or aerosols; or dermally, for example, topically or via trans-dermal patches.
The compositions may conveniently be administered in unit dosage form and may be prepared by any of the methods well known in the pharmaceutical art, for example, as described in Remington: The Science and Practice of Pharmacy, 20th ed.; Gennaro, A. R., Ed.; Lippincott Williams & Wilkins: Philadelphia, Pa., 2000. Pharmaceutically compatible binding agents, and/or adjuvant materials can be included as part of the composition. Oral compositions will generally include an inert diluent carrier or an edible carrier.
The tablets, pills, powders, capsules, troches and the like can contain one or more of any of the following ingredients, or compounds of a similar nature: a binder such as microcrystalline cellulose, or gum tragacanth; a diluent such as starch or lactose; a disintegrant such as starch and cellulose derivatives; a lubricant such as magnesium stearate; a glidant such as colloidal silicon dioxide; a sweetening agent such as sucrose or saccharin; or a flavoring agent such as peppermint, or methyl salicylate. Capsules can be in the form of a hard capsule or soft capsule, which are generally made from gelatin blends optionally blended with plasticizers, as well as a starch capsule. In addition, dosage unit forms can contain various other materials that modify the physical form of the dosage unit, for example, coatings of sugar, shellac, or enteric agents. Other oral dosage forms syrup or elixir may contain sweetening agents, preservatives, dyes, colorings, and flavorings. In addition, the active compounds may be incorporated into fast dissolve, modified-release or sustained-release preparations and formulations, and wherein such sustained-release formulations are preferably bi-modal.
Preferred formulations include pharmaceutical compositions in which a compound of the present invention is formulated for oral or parenteral administration, or more preferably those in which a compound of the present invention is formulated as a tablet. Preferred tablets contain lactose, cornstarch, magnesium silicate, croscarmellose sodium, povidone, magnesium stearate, or talc in any combination. It is also an aspect of the present disclosure that a compound of the present invention may be incorporated into a food product or a liquid.
Liquid preparations for administration include sterile aqueous or nonaqueous solutions, suspensions, and emulsions. The liquid compositions may also include binders, buffers, preservatives, chelating agents, sweetening, flavoring and coloring agents, and the like. Nonaqueous solvents include alcohols, propylene glycol, polyethylene glycol, vegetable oils such as olive oil, and organic esters such as ethyl oleate. Aqueous carriers include mixtures of alcohols and water, buffered media, and saline. In particular, biocompatible, biodegradable lactide polymer, lactide/glycolide copolymer, or polyoxyethylene-polyoxypropylene copolymers may be useful excipients to control the release of the active compounds. Intravenous vehicles can include fluid and nutrient replenishers, electrolyte replenishers, such as those based on Ringer's dextrose, and the like. Other potentially useful parenteral delivery systems for these active compounds include ethylene-vinyl acetate copolymer particles, osmotic pumps, implantable infusion systems, and liposomes.
Alternative modes of administration include formulations for inhalation, which include such means as dry powder, aerosol, or drops. They may be aqueous solutions containing, for example, polyoxyethylene-9-lauryl ether, glycocholate and deoxycholate, or oily solutions for administration in the form of nasal drops, or as a gel to be applied intranasally. Formulations for buccal administration include, for example lozenges or pastilles and may also include a flavored base, such as sucrose or acacia, and other excipients such as glycocholate. Formulations suitable for rectal administration are preferably presented as unit-dose suppositories, with a solid based carrier, such as cocoa butter, and may include a salicylate. Formulations for topical application to the skin preferably take the form of an ointment, cream, lotion, paste, gel, spray, aerosol, or oil. Carriers which can be used include petroleum jelly, lanolin, polyethylene glycols, alcohols, or their combinations. Formulations suitable for transdermal administration can be presented as discrete patches and can be lipophilic emulsions or buffered, aqueous solutions, dissolved and/or dispersed in a polymer or an adhesive.
The compounds of the current invention can be employed as the sole active ingredient in a pharmaceutical composition. Alternatively, they can be used in combination or combined with other pharmaceutical agents associated with the same or other disease states. In particular, the compounds of formula (I), can be combined with agents that are useful for the treatment of HIV, including reverse transcriptase or protease inhibitors. The present invention encompasses, therefore, combinations of the compounds of the current invention with agents or pharmaceutical compositions known to be prescribed or effective with regard to such conditions.
Said ingredients can be administered simultaneously or separately.
The compounds of the current invention and their pharmaceutically acceptable derivatives may be employed in combination with other therapeutic agents, but not limited to, such as:
(1-alpha,2-beta,3-alpha)-9-[2,3-bis(hydroxymethyl)cyclobutyl]guanine [(−)BHCG, SQ-34514, lobucavir]; 9-[(2R,3R,4S)-3,4-bis(hydroxylmethyl)-2-oxetanosyl]-adenine (oxetanocin-G); acyclic nucleosides, for example acyclovir, valaciclovir, famciclovir, ganciclovir, and penciclovir; acyclic phosphonates, for example (S)-1-(3-hydroxy-2-phosphonyl-methoxypropyl) cytosine (HPMPC, cidofovir), [[[2-(6-amino-9H-purin-9-yl)ethoxy]methyl]phosphinylidene]bis(oxymethylene)-2,2-dimethyl propanoic acid (bis-POM PMEA, adefovir dipivoxil), [[(1R)-2-(6-amino-9H-purin-9-yl)-1-methylethoxy]methyl]phosphonic acid (tenofovir), and (R)-[[2-6-amino-9H-purin-9-yl)-1-methylethoxy]methyl]phosphonic acid bis-(isopropoxycarbonyloxymethyl)ester (bis-POC-PMPA); ribonucleotide reductase inhibitors, for example 2-acetylpyridine-5-[(2-chloranilino)thiocarbonyl]thiocarbonohydrazone and hydroyurea; nucleoside reverse transcriptase inhibitors, for example 3′-azido-3′-deoxythymidine (AZT, zidovudine), 2′,3′-dideoxycytidine (ddC, zalcitabine), 2′,3′-dideoxyadenosine, 2′,3′-didexyinosine (ddI, didanosine), 2′,3′-didehydrothymidine (d4T, stavudine), (−)-beta-D-2,6-diaminopurine dioxolane (DAPD), 3′-azido-2′,3′-dideoxythymidine-5′-H-phosphosphonate (phosphonovir), 2′-deoxy-5-iodo-uridine (idoxuridine), (−)-cis-1-(2-hydroxymethyl)-1,3-oxathiolane-5-yl)-cytosine (lamivudine), cis-1-(2-(hydroxymethyl)-1,3-oxathiolan-5-yl)-5-fluorocytosine (FTC), 3′-deoxy-3′-fluorothymidine, 5-chloro-2′,3′-dideoxy-3′-fluorouridine, (−)-cis-4-[2-amino-6-(cyclopropylamino)-9H-purin-9-yl]-2-cyclopentene-1-methanol (abacavir), 9-[4-hydroxy-2-(hydroxymethyl)but-1-yl]-guanine (H2G), ABT-606 (H2G progrug, valomaciclovir) and ribavirin; protease inhibitors, for example indinavir, ritonavir, nelfinavir, amprenavir, saquinavir, fosamprenavir, (R)—N-tert-butyl-3-[(2S,3S)-2-hydroxy-3-N—[(R)-2-N-(isoquinolin-5-yloxyacetyl)amino-3-methylthio-propanoyl]amino-4-phenylbutanoyl]-5,5-dimethyl-1,3-thiazolidine-4-carboxamide (KNI-272), (4R,5S,6S,7R)-1,3-bis(3-aminobenzyl)-4,7-dibenzylhexahydro-5,6-dihydroxy-2H-1,3-diazepin-2-one dimethanesulfonate (mozenavir, DMP-450), methyl N-[(2S)-1-[[(2S,3S)-3-hydroxy-4-[[[(2S)-2-(methoxycarbonylamino)-3,3-dimethylbutanoyl]amino]-[(4-pyridin-2-ylphenyl)methyl]amino]-1-phenylbutan-2-yl]amino]-3,3-dimethyl-1-oxobutan-2-yl]carbamate (BMS-232632, atazanavir), 3-(2(S)-Hydroxy-3(S)-(3-hydroxy-2-methylbenzamido)-4-phenylbutanoyl)-5,5-dimethyl-N-(2-methylbenzyl)thiazolidine-4(R)-carboxamide (AG-1776), N-(2(R)-hydroxy-1(S)-indanyl)-2(R)-phenyl-methyl-4(S)-hydroxy-5-(1-(1-(4-benzo[b]furanylmethyl)-2(S)—N′-(tert-butyl carboxamido)piperazinyl)pentanamide (MK-944A); interferons such as α-interferon; renal excretion inhibitors such as probenecid; nucleoside transport inhibitors such as dipyridamole, pentoxifylline, N-acetylcysteine (NAC), Procysteine, α-trichosanthin, phosphonoformic acid; as well as immunomodulators such as interleukin II or thymosin, granulocyte macrophage colony stimulating factors, erythropoetin, soluble CD4 and genetically engineered derivatives thereof; non-nucleoside reverse transcriptase inhibitors (NNRTIs), for example nevirapine (BI-RG-587), alpha-((2-acetyl-5-methylphenyl)amino)-2,6-dichloro-benzene-acetamide (loviride), 1-[3-(isopropyl amino)-2-pyridyl]-4-[5-(methanesulfonamido)-1H-indol-2-ylcarbonyl]piperazine monomethanesulfonate (delavirdine), (10R,11S,12S)-12-Hydroxy-6,6,10,11-tetramethyl-4-propyl-11,12-dihydro-2H,6H,10H-benzo(1,2-b:3,4-b′:5,6-b″)tripyran-2-one ((+)-calanolide A), (4S)-6-Chloro-4-[1-(E)-cyclopropyl ethenyl)-3,4-dihydro-4-(trifluoromethyl)-2(1H)-quinazolinone (DPC-083), (S)-6-chloro-4-(cyclopropyl ethynyl)-1,4-dihydro-4-(trifluoromethyl)-2H-3,1-benzoxazin-2-one (efavirenz, DMP 266), 1-(ethoxy methyl)-5-(1-methylethyl)-6-(phenylmethyl)-2,4(1H,3H)-pyrimidinedione (MKC-442), and 5-(3,5-dichloro phenyl)thio-4-isopropyl-1-(4-pyridyl)methyl-(1H)-imidazol-2-ylmethyl carbamate (capravirine); glycoprotein 120 antagonists, for example PRO-2000, PRO-542 and 1,4-bis[3-[(2,4-dichlorophenyl)carbonylamino]-2-oxo-5,8-disodiumsulfanyl]-naphthalyl-2,5-dimethoxyphenyl-1,4-dihydrazone (FP-21399); cytokine antagonists, for example reticulose (Product-R), 1,1′-azobis-formamide (ADA), 1,11-(1,4-phenylenebis(methylene))bis-1,4,8,11-tetraazacyclotetradecane octahydrochloride (AMD-3100); integrase inhibitors, for example raltegravir and elvitegravir; and fusion inhibitors, for example T-20 and T-1249.
The following examples are given for illustration of the invention and are not intended to be limited thereof.
s: singlet
brs: broad singlet
d: doublet
brd: broad doublet
t: triplet
q: quadruplet
quint: quintuplet
dd: doubled doublet
dt: doubled triplet
dq: doubled quadruplet
sept: septuplet
m: massif
Commercial compounds were purchased from Acros Organics, Sigma-Aldrich, Alfa Aesar, Chembridge and Maybridge.
CAS numbers of other building blocks are indicated in brackets.
General Procedure X: Typical Synthesis of Acids:
Step 1: To a solution of the starting material (1 eq) in acetonitrile (1.3 mL/mmol) were added anhydrous potassium carbonate (1.5 eq) and the halogeno-ester (1.1 eq). The mixture was refluxed overnight (the reaction was monitored by TLC), then water was added. The mixture was extracted 3 times with ethyl acetate, the organic layers were combined, dried on anhydrous MgSO4, filtered and concentrated in vacuum to give the ester which was possibly purified by flash chromatography on silica gel.
Step 2: To a solution of the ester (1 eq) in dioxane (2 mL/mmol) was added NaOH 3N (4 eq). The mixture was stirred at room temperature or reflux; the reaction was monitored by TLC. Then the mixture was evaporated in vacuum and acidified to pH=1 by addition of HCl 4N. The precipitated was filtered and dried to give the acid.
To a solution of the aldehyde (1 eq) in methanol (2 mL/mmol) were added a solution of methylamine in methanol (2 eq) and titanium (IV) isopropoxide (1.3 eq). The mixture was stirred 5 hours at room temperature and sodium borohydride (1 eq) was added. The mixture was then stirred 2 hours and water was added. Salts were filtered and the filtrate was extracted 3 times with diethyl ether. The organic layers were combined, washed with brine, dried on anhydrous MgSO4, filtered and concentrated in vacuum to give the benzylamine which was used without purification.
To a solution of the amine (1 eq) in N,N-dimethylformamide were added 2-fluorobenzaldehyde (1 eq) and anhydrous potassium carbonate (1.5 eq). The mixture were refluxed overnight (the reaction was monitored by TLC), then water was added. The mixture was extracted 3 times with ethyl acetate, the organic layers were combined, dried on anhydrous MgSO4, filtered and concentrated in vacuum. The residue was purified by flash chromatography on silica gel to give the 2-aminobenzaldehyde.
The benzylamine derivative was then prepared by reductive amination of the aldehyde according general procedure Y.
To a solution of acid (1 eq) and amine (1.1 eq) in dichloromethane were added 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (1.1 eq) and N,N-dimethylaminopyridine (1.1 eq). The solution was stirred 24 hours at room temperature and a saturated solution of NaHCO3 was added. The mixture was extracted 3 times with ethyl acetate, the organic layers were combined and washed with HCl 1N, dried over anhydrous MgSO4 and concentrated under vacuum. The residue was purified by flash chromatography (silica gel) with the appropriate gradient determined by TLC.
The following compounds were prepared according general procedure A:
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and commercial 3-chloro-N-methylbenzylamine in 35% yield.
NMR-1H (CDCl3): δ (ppm) 7.34-7.17 (m, 3H); 7.17-6.99 (m, 1H); 6.83-6.67 (m, 2H); 4.53 (d, 2H); 2.94 (d, 3H); 2.86 (dt, 2H); 2.53 (q, 2H); 1.97 (quint, 2H)
MS (ESI+): m/z=350 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and commercial 4-fluoro-N-methylbenzylamine in 46% yield.
NMR-1H (CDCl3): δ (ppm) 7.29-6.90 (m, 6H); 6.77-6.65 (m, 2H); 4.49 (d, 2H); 2.94-2.76 (m, 5H); 2.50 (t, 2H); 2.01-1.85 (m, 2H)
MS (ESI+): m/z=334 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and commercial 2-chloro-N-methylbenzylamine in 81% yield.
NMR-1H (CDCl3): δ (ppm) 7.47-7.00 (m, 6H); 6.81-6.68 (m, 2H); 4.66 (d, 2H); 3.05-2.77 (m, 5H); 2.51 (dt, 2H); 2.06-1.86 (m, 2H)
MS (ESI+): m/z=350 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and commercial 4-chloro-N-methylbenzylamine in 59% yield.
NMR-1H (CDCl3): δ (ppm) 7.41-7.02 (m, 6H); 6.75 (dd, 2H); 4.52 (d, 2H); 2.99-2.76 (m, 5H); 2.59-2.42 (m, 2H); 2.05-1.87 (m, 2H)
MS (ESI+): m/z=350 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and commercial (R)-(+)—N-methyl-1-phenylethylamine in 11% yield.
NMR-1H (CDCl3): δ (ppm) 7.33-7.13 (m, 7H); 6.73-6.69 (m, 2H); 5.99 (q, 1H); 2.88-2.81 (m, 2H); 2.60-2.57 (m, 3H); 2.42 (t, 2H); 1.98-1.87 (m, 2H); 1.51 (d, 3H)
MS (ESI+): m/z=330 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and commercial 4-methoxy-N-methylbenzylamine in 57% yield.
NMR-1H (CDCl3): δ (ppm) 7.22-6.99 (m, 3H); 6.84-6.68 (m, 5H); 4.42 (d, 2H); 3.73 (d, 3H); 2.85-2.65 (m, 5H); 2.47 (q, 2H); 1.96-1.82 (m, 2H)
MS (ESI+): m/z=346 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and commercial N-methyl-4-(trifluoromethyl)benzylamine in 50% yield.
NMR-1H (CDCl3): δ (ppm) 7.60-7.48 (m, 2H); 7.27-7.14 (m, 4H); 6.77-6.65 (m, 2H); 4.53 (d, 2H); 2.88-2.78 (m, 5H); 2.50-2.39 (m, 2H); 1.97-1.84 (m, 2H)
MS (ESI+): m/z=384 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and commercial 4,N-dimethylbenzylamine in 50% yield.
NMR-1H (CDCl3): δ (ppm) 7.30-7.02 (m, 6H); 6.78-6.73 (m, 2H); 4.51 (d, 2H); 2.93-2.82 (m, 5H); 2.55-2.48 (m, 2H); 2.34 (d, 2H); 2.03-1.88 (m, 2H)
MS (ESI+): m/z=330 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and commercial N-methylaniline in 50% yield.
NMR-1H (CDCl3): δ (ppm) 7.39-7.29 (m, 3H); 7.17-7.08 (m, 4H); 6.69 (d, 2H); 3.19 (s, 3H); 2.67 (t, 2H); 2.13 (t, 2H); 1.78 (m, 2H)
MS (ESI+): m/z=302 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and commercial N-methylbenzhydrylamine in 5% yield.
NMR-1H (CDCl3): δ (ppm) 7.37-7.15 (m, 13H); 6.74 (d, 2H); 2.94-2.72 (m, 5H); 2.63-2.54 (m, 2H); 2.06-1.93 (m, 2H)
MS (ESI+): m/z=392 [M+H]+
To a solution of the acid (1 eq) and the amine (1 eq) in N,N-dimethylformamide were added 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (1 eq) and N,N-dimethylaminopyridine (1 eq). The solution was stirred overnight at room temperature and a saturated solution of NaHCO3 was added. The mixture was extracted 3 times with ethyl acetate, the organic layers were combined and washed with HCl 1N, dried over anhydrous MgSO4 and concentrated under vacuum. The residue was purified by flash chromatography (silica gel) with the appropriate gradient determined by TLC.
The following compounds were prepared according general procedure B:
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and N-methyl-2-(morpholin-4-yl)benzylamine [871217-44-6] in 50% yield.
NMR-1H (CDCl3): δ (ppm) 7.29-7.08 (m, 6H); 6.77 (t, 2H); 4.67 (d, 2H); 3.93-3.78 (m, 4H); 2.99 (d, 3H); 2.96-2.82 (m, 4H); 2.80 (t, 2H); 2.53 (dt, 2H); 2.05-1.89 (m, 2H)
MS (ESI+): m/z=401 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]pentanoic acid (see below) and commercial 2-methoxy-N-methylbenzylamine in 65% yield.
NMR-1H (CDCl3): δ (ppm) 7.31-7.13 (m, 3H); 7.01-6.76 (m, 5H); 4.55 (d, 2H); 3.82 (d, 3H); 2.94 (s, 3H); 2.83-2.72 (m, 2H); 2.36 (t, 2H); 1.83-1.68 (m, 2H); 1.66-1.48 (m, 4H)
MS (ESI+): m/z=360 [M+H]+
4-[(4-Hydroxyphenyl)thio]pentanoic acid was prepared according general procedure X from commercial 4-hydroxythiophenol and methyl 5-pentanoic acid.
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and N-methyl-2-(4-methylpiperazin-1-yl)benzylamine (see below) in 58% yield.
NMR-1H (CDCl3): δ (ppm) 7.31-7.01 (m, 6H); 6.75 (dd, 2H); 4.64 (d, 2H); 3.03-2.85 (m, 7H); 2.81 (t, 2H); 2.66-2.53 (m, 4H); 2.51 (dt, 2H); 2.37 (d, 3H); 2.09-1.81 (m, 2H)
MS (ESI+): m/z=414 [M+H]+
N-Methyl-2-(4-methylpiperazin-1-yl)benzylamine was prepared according general procedure Y from commercial 2-(4-methylpiperazino)benzaldehyde.
Prepared from 4-[(4-fluorophenyl)thio]butanoic acid [18850-56-1] and commercial 2-chloro-N-methylbenzylamine in 82% yield.
NMR-1H (CDCl3): δ (ppm) 7.45-7.13 (m, 4H); 7.10-6.89 (m, 2H); 4.65 (d, 2H); 3.07-2.86 (m, 5H); 2.55 (t, 1H); 2.43 (t, 1H); 2.10-1.86 (m, 2H).
MS (ESI+): m/z=352 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and N-methyl-2-(trifluoromethyl)benzylamine [296276-41-0] in 38% yield.
NMR-1H (CDCl3): δ (ppm) 7.73-7.16 (m, 6H); 6.75 (t, 2H); 4.78 (d, 2H); 2.97 (d, 3H); 2.91 (t, 1H); 2.81 (t, 1H); 2.61 (t, 1H); 2.45 (t, 1H); 2.06-1.87 (m, 2H)
MS (ESI+): m/z=384 [M+H]+
Prepared from 4-[[5-(trifluoromethyl)-2-pyridinyl]thio]butanoic acid [1019352-70-5] and commercial 2-methoxy-N-methylbenzylamine in 79% yield.
NMR-1H (CDCl3): δ (ppm) 8.59 (br s, 1H); 7.62 (br d, 1H); 7.33-7.13 (m, 2H); 7.06-6.81 (m, 3H); 4.55 (d, 2H); 3.82 (d, 3H); 3.26 (dt, 2H); 2.93 (s, 3H); 2.52 (t, 2H); 2.09 (m, 2H)
MS (ESI+): m/z=399 [M+H]+
Prepared from 4-(2-naphthalenylthio)butanoic acid [5324-80-1] and commercial 2-methoxy-N-methylbenzylamine in 69% yield.
NMR-1H (CDCl3): δ (ppm) 7.84-7.67 (m, 4H); 7.52-7.33 (m, 3H); 7.34-7.08 (m, 1H); 7.05-6.82 (m, 3H); 4.54 (d, 2H); 3.82 (d, 3H); 3.13 (dt, 2H); 2.92 (s, 3H); 2.56 (t, 2H); 2.15-1.99 (m, 2H)
MS (ESI+): m/z=380 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and N-methyl-1-naphthylmethylamine [14489-75-9] in 20% yield.
NMR-1H (DMSO): δ (ppm) 9.53 (s, 1H); 8.09-7.82 (m, 3H); 6.62-7.41 (m, 3H); 7.31 (br d, 1H); 7.20 (d, 1H); 7.09 (br d, 1H); 6.76-6.63 (m, 2H); 5.00 (d, 2H); 3.87 (d, 3H); 2.79 (dt, 2H); 2.45 (dt, 2H); 1.84-1.63 (m, 2H)
MS (ESI+): m/z=366 [M+H]+
Prepared from commercial 5-(4-hydroxyphenyl)pentanoic acid and commercial 2-methoxy-N-methylbenzylamine in 27% yield.
NMR-1H (CDCl3): δ (ppm) 7.36-7.10 (m, 1H); 7.07-6.66 (m, 7H); 4.56 (d, 2H); 3.82 (d, 3H); 2.94 (s, 3H); 2.54 (dt, 2H); 2.39 (t, 2H); 1.81-1.51 (m, 4H)
MS (ESI+): m/z=328 [M+H]+
Prepared from 4-[[4-(acetylamino)phenyl]thio]butanoic acid [1016762-61-0] and commercial 2-methoxy-N-methylbenzylamine in 69% yield.
NMR-1H (CDCl3): δ (ppm) 8.54 (d, 1H); 7.43 (dd, 2H); 7.35-7.15 (m, 2H); 7.08 (d, 1H); 7.04-6.76 (m, 3H); 4.53 (d, 2H); 3.80 (d, 3H); 3.09-2.76 (m, 5H); 2.51 (t, 2H); 2.09 (s, 3H); 2.02-1.90 (m, 2H)
MS (ESI+): m/z=387 [M+H]+
Prepared from 4-[(2-hydroxyphenyl)thio]butanoic acid [1004781-54-7] and commercial 2-methoxy-N-methylbenzylamine in 41% yield.
NMR-1H (CDCl3): δ (ppm) 7.42 (ddd, 1H); 7.33-7.11 (m, 2H); 7.05-6.76 (m, 5H); 4.55 (d, 2H); 3.82 (d, 3H); 2.93 (d, 3H); 2.8 (dt, 2H); 2.48 (t, 2H); 2.10-1.78 (m, 2H);
MS (ESI+): m/z=346 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and (2,3-dihydro-benzofuran-7-ylmethyl)methylamine [389845-43-6] in 48% yield.
NMR-1H (CDCl3): δ (ppm) 7.2 (dd, 2H); 7.1 (ddd, 1H); 6.99 (d, 1H); 6.89-6.69 (m, 3H); 4.73-4.34 (m, 4H), 3.20 (q, 2H); 2.94 (d, 3H); 2.84 (dt, 2H); 2.55 (dt, 2H); 2.05-1.82 (m, 2H)
MS (ESI+): m/z=358 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and 2-hydroxy-N-methylbenzylamine [60399-02-2] in 31% yield.
NMR-1H (CDCl3): δ (ppm) 7.30-7.19 (m, 3H); 7.11 (dd, 1H); 6.94 (dd, 1H); 6.83 (dt, 1H); 6.78-6.70 (m, 2H); 4.42 (s, 3H); 3.03 (s, 3H); 2.85 (t, 2H); 2.47 (t, 2H); 1.91 (quint, 2H)
MS (ESI+): m/z=332 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and N-methyl-N-(2-pyridylmethyl)amine [21035-59-6] in 23% yield.
NMR-1H (CDCl3): δ (ppm) 8.52 (dd, 1H); 7.70 (ddt, 1H); 7.36-7.08 (m, 4H); 6.87-6.62 (m, 2H); 4.67 (d, 2H); 3.01 (d, 3H); 2.83 (dt, 2H); 2.59-2.45 (m, 2H); 2.09-1.79 (m, 2H)
MS (ESI+): m/z=317 [M+H]+
Prepared from 4-[(4-fluorophenyl)thio]butanoic acid [18850-56-1] and commercial 2-methoxy-N-methylbenzylamine in 79% yield.
NMR-1H (CDCl3): δ (ppm) 7.47-7.07 (m, 3H); 7.08-6.77 (m, 5H); 4.54 (d, 2H); 3.84 (d, 3H); 3.05-2.85 (m, 5H); 2.50 (dt, 2H); 2.07-1.87 (m, 2H)
MS (ESI+): m/z=348 [M+H]+
Prepared from 4-[(3-hydroxyphenyl)thio]butanoic acid [1004781-69-4] and commercial 2-methoxy-N-methylbenzylamine in 94% yield.
NMR-1H (CDCl3): δ (ppm) 7.43-6.52 (m, 8H); 4.56 (d, 2H); 3.81 (d, 3H); 3.96-2.80 (m, 5H); 2.46 (q, 2H); 2.03-1.85 (m, 2H)
MS (ESI+): m/z=346 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and N-methyl-N-[2-(trifluoromethoxy)benzyl]amine [823188-82-5] in 41% yield.
NMR-1H (CDCl3): δ (ppm) 7.8 (s large, 1H); 7.42-7.07 (m, 6H); 6.91-6.64 (m, 2H); 4.65 (d, 2H); 2.96 (s, 3H); 2.85 (dt, 2H); 2.53 (dt, 2H); 2.93-2.76 (m, 2H)
MS (ESI+): m/z=400 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and commercial N-methylfurfurylamine in 67% yield.
NMR-1H (CDCl3): δ (ppm) 7.33 (d, 1H); 7.24 (dd, 2H); 6.78 (d, 2H); 6.31 (d, 1H); 6.26-6.14 (m, 1H); 4.48 (d, 2H); 2.96 (d, 3H); 2.84 (dt, 2H); 2.64 (t, 1H); 2.48 (t, 1H); 2.07-1.80 (m, 2H);
MS (ESI+): m/z=306 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and 2,3-dimethoxy-N-methylbenzylamine [53663-28-8] in 47% yield.
NMR-1H (CDCl3): δ (ppm) 7.29-7.23 (m, 2H); 6.07-6.61 (m, 5H); 4.60 (d, 2H); 3.85 (dd, 6H); 2.92 (s, 3H); 2.90-2.81 (m, 2H); 2.67-2.39 (m, 2H); 2.09-1.83 (m, 2H)
MS (ESI+): m/z=376 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid (CAS [85896-82-8]) and 2-ethoxy-N-methylbenzylamine [709651-39-8] in 40% yield.
NMR-1H (CDCl3): δ (ppm) 7.32-7.11 (m, 3H); 7.05-6.74 (m, 5H); 4.58 (d, 2H); 4.04 (quint, 2H); 2.95 (d, 3H); 2.85 (dt, 2H); 2.67-2.49 (m, 2H); 2.06-1.88 (m, 2H); 1.41 (q, 3H)
MS (ESI+): m/z=360 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and 2-chloro-6-fluoro-N-methylbenzylamine [62924-64-5] in 36% yield.
NMR-1H (CDCl3): δ (ppm) 7.7 (s, 1H); 7.3-7.2 (m, 4H); 7.04-6.90 (m, 1H); 6.77 (dd, 2H); 4.77 (d, 2H); 2.92-2.7 (m, 5H); 2.5 (t, 2H); 2.02-1.85 (m, 2H)
MS (ESI+): m/z=368 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and 2,6-dichloro-N-methylbenzylamine [15205-19-3] in 28% yield.
NMR-1H (CDCl3): δ (ppm) 7.54-7.06 (m, 5H); 6.78 (dd, 2H); 4.88 (d, 2H); 2.90 (t, 2H); 2.72 (d, 3H); 2.51 (t, 2H); 2.08-1.87 (m, 2H)
MS (ESI+): m/z=384/386 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and commercial 2-fluoro-N-methylbenzylamine in 30% yield.
NMR-1H (CDCl3): δ (ppm) 7.77 (s, 1H); 7.35-6.97 (m, 6H); 6.90-6.66 (m, 2H); 4.61 (d, 2H); 2.96 (d, 3H); 2.85 (q, 2H); 2.55 (q, 2H); 2.03-1.85 (m, 2H)
MS (ESI+): m/z=334 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and 2,3-dichloro-N-methylbenzylamine [731827-07-9] in 62% yield.
NMR-1H (CDCl3): δ (ppm) 7.57-6.89 (m, 5H); 6.87-6.58 (m, 2H); 5.96 (br s, 1H); 4.66 (d, 2H); 2.98 (s, 3H); 2.87 (dt, 2H); 2.55 (dt, 2H); 2.11-1.83 (m, 2H)
MS (ESI+): m/z=384/386 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and commercial 2-methoxy-N-methylbenzylamine in 32% yield.
NMR-1H (CDCl3): δ (ppm) 7.33-6.82 (m, 6H); 6.80-6.71 (m, 2H); 4.56 (d, 2H); 3.83 (d, 3H); 2.94 (d, 3H); 2.85 (dd, 2H); 2.52 (t, 2H); 2.04-1.85 (m, 2H)
MS (ESI+): m/z=346 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and 2,4-dichloro-N-methylbenzylamine
[5013-77-4] in 64% yield.
NMR-1H (CDCl3): δ (ppm) 7.52-6.91 (m, 5H); 6.89-6.60 (m, 2H); 5.73 (br s, 1H); 4.61 (d, 2H); 2.96 (s, 1H); 2.89 (dt, 2H); 2.49 (dt, 2H); 2.09-1.81 (m, 2H)
MS (ESI+): m/z=384/386 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and N,2-dimethylbenzylamine [874-33-9] in 35% yield.
NMR-1H (CDCl3): δ (ppm) 7.44-7.12 (m, 5H); 7.06 (d, 1H); 6.90-6.69 (m, 2H); 4.55 (d, 2H); 2.93 (d, 3H); 2.87 (dt, 2H); 2.51 (dt, 2H); 2.27 (d, 3H); 2.06-1.86 (m, 2H)
MS (ESI+): m/z=330 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and benzo[1,3]dioxol-4-ylmethyl-methylamine [110931-73-2] in 56% yield.
NMR-1H (CDCl3): δ (ppm) 7.37-7.17 (m, 2H); 6.95-6.54 (m, 5H); 5.93 (d, 2H); 4.53 (d, 2H); 2.95 (d, 3H); 2.86 (q, 2H); 2.55 (dt, 2H); 2.06-1.84 (m, 2H)
MS (ESI+): m/z=360 [M+H]+
Prepared from 4-[(2-quinolinyl)thio]butanoic acid (see below) and commercial 2-methoxy-N-methylbenzylamine in 65% yield.
NMR-1H (CDCl3): δ (ppm) 7.96-7.82 (m, 2H); 7.75-7.56 (m, 2H); 7.47-7.36 (m, 1H); 7.31-7.14 (m, 2H); 7.05-6.82 (m, 3H); 4.56 (d, 2H); 3.81 (d, 3H); 3.51-3.35 (m, 2H); 2.93 (s, 3H); 2.60 (t, 2H); 2.19 (m, 2H)
MS (ESI+): m/z=381 [M+H]+
4-[(2-Quinolinyl)thio]butanoic acid was prepared according general procedure X from commercial 2-quinolinethiol and commercial ethyl 4-bromobutanoic acid.
Prepared from 4-{[4-(trifluoromethyl)phenyl]thio}butanoic acid (see below) and commercial 2-methoxy-N-methylbenzylamine in 71% yield.
NMR-1H (CDCl3): δ (ppm) 7.52-7.13 (m, 5H); 7.05-6.83 (m, 3H); 4.55 (d, 2H); 3.83 (d, 3H); 3.15-3.00 (dt, 2H); 2.94 (d, 3H); 2.53 (t, 2H); 2.14-1.96 (m, 2H)
MS (ESI+): m/z=398 [M+H]+
4-{[4-(trifluoromethyl)phenyl]thio}butanoic acid was prepared according general procedure X from commercial 4-(trifluoromethyl)thiophenol and commercial ethyl 4-bromobutanoic acid.
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and 2-isopropoxy-N-methylbenzylamine (see below) in 53% yield.
NMR-1H (CDCl3): δ (ppm) 7.32-7.12 (m, 3H); 7.03-6.72 (m, 5H); 4.59 (sept; 1H); 4.55 (d, 2H); 2.94 (d, 3H); 2.83 (dd, 2H); 2.53 (q, 2H); 1.94 (quint, 2H); 1.33 (t, 6H)
MS (ESI+): m/z=374 [M+H]+
2-Isopropoxy-N-methylbenzylamine was prepared according general procedure Y from commercial 2-isopropoxybenzaldehyde.
Prepared from 4-[(4-methoxyphenyl)thio]butanoic acid [52872-94-3] and commercial 2-methoxy-N-methylbenzylamine in 42% yield.
NMR-1H (CDCl3): δ (ppm) 7.38-7.10 (m, 3H); 7.05-6.77 (m, 5H); 4.55 (d, 2H); 3.83 (d, 3H); 3.79 (d, 3H); 3.04-2.75 (m, 5H); 2.51 (dt, 2H); 2.10-1.81 (m, 2H)
MS (ESI+): m/z=360 [M+H]+
Prepared from 4-[(4-fluorophenyl)thio]butanoic acid [18850-56-1] and 2-hydroxy-N-methylbenzylamine [60399-02-2] in 65% yield.
NMR-1H (CDCl3): δ (ppm) 9.55 (s, large, 1H); 7.41-7.19 (m, 3H); 7.11 (dd, 1H); 7.02-6.88 (m, 3H); 6.82 (dt, 1H); 4.42 (s, 2H); 3.02 (d, 3H); 2.95 (t, 2H); 2.48 (t, 2H); 1.96 (p, 2H)
MS (ESI+): m/z=334 [M+H]+
Prepared from 4-(1H-indol-5-yloxy]butanoic acid (see below) and commercial 2-methoxy-N-methylbenzylamine in 56% yield.
NMR-1H (CDCl3): δ (ppm) 8.16 (br s, 1H); 7.33-7.21 (m, 2H); 7.21-6.99 (m, 3H); 6.97-6.74 (m, 3H); 6.46 (dd, 1H); 4.59 (d, 2H); 4.07 (dt, 2H); 3.82 (d, 3H); 2.97 (d, 3H); 2.63 (t, 2H); 2.27-2.12 (m, 2H)
MS (ESI+): m/z=353 [M+H]+
4-(1H-indol-5-yloxy]butanoic acid was prepared according general procedure X from commercial 5-hydroxyindole and commercial ethyl 4-bromobutanoic acid.
Prepared from 4-[(4-fluorophenyl)thio]butanoic acid [18850-56-1] and 2,3-dichloro-N-methylbenzylamine [731827-07-9] in 67% yield.
NMR-1H (CDCl3): δ (ppm) 7.54-6.83 (m, 7H); 4.65 (d, 2H); 3.13-2.81 (m, 5H); 2.48 (dt, 2H); 2.06-1.86 (m, 2H)
MS (ESI+): m/z=386/388 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and methyl 2-[(methylamino)methyl]benzoate in 11% yield.
NMR-1H (CDCl3): δ (ppm) 8.00 (ddd, 1H); 7.67-7.03 (m, 5H); 6.88-6.62 (m, 2H); 4.98 (d, 2H); 3.90 (d, 3H); 2.98 (d, 3H); 2.84 (dt, 2H); 2.50 (dt, 2H); 2.04-1.82 (m, 2H)
MS (ESI+): m/z=374 [M+H]+
Methyl 2-[(methylamino)methyl]benzoate was prepared by esterification of 2-[(methylamino)methyl]benzoic acid [527705-23-3].
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and ethyl 4-[2-(methylamino)methylphenyl]piperazine-1-carboxylate (see below) in 71% yield.
NMR-1H (CDCl3): δ (ppm) 7.74 (s, large 1H); 7.38-7.00 (m, 6H); 6.76 (t, 2H); 4.66 (d, 2H); 4.27-4.09 (m, 2H); 3.71-3.50 (m, 4H); 3.04-2.69 (m, 9H); 2.52 (dt, 2H); 2.08-1.81 (m, 3H); 1.29 (dt, 4H)
MS (ESI+): m/z=472 [M+H]+
Ethyl 4-[2-(methylamino)methylphenyl]piperazine-1-carboxylate was prepared according general procedure Y from ethyl 4-(2-formylphenyl)piperazine-1-carboxylate [204078-77-3].
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and 2-(4-hydroxypiperidin-1-yl)-N-methylbenzylamine (see below) in 41% yield.
NMR-1H (CDCl3): δ (ppm) 7.28-7.02 (m, 6H); 6.79-6.73 (m, 2H); 4.59 (d, 2H); 3.01-2.67 (m, 8H); 2.55 (t, 1H); 2.44 (t, 1H); 2.03-1.86 (m, 5H); 1.78-1.60 (m, 4H)
MS (ESI+): m/z=415 [M+H]+
2-(4-Hydroxypiperidin-1-yl)-N-methylbenzylamine was prepared according general procedure Y from 2-(4-Hydroxy-piperidin-1-yl)benzaldehyde [291545-00-1].
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and N-methyl-2-phenoxybenzylamine [361394-74-3] in 31% yield.
NMR-1H (CDCl3): δ (ppm) 7.36-6.86 (m, 11H); 6.76-6.71 (m, 2H); 4.61 (d, 2H); 2.95-2.94 (m, 3H); 2.86-2.74 (m, 2H); 2.53-2.41 (m, 2H); 1.97-1.82 (m, 2H)
MS (ESI+): m/z=408 [M+H]+
Prepared from 4-[(4-fluorophenyl)thio]butanoic acid [18850-56-1] and 2-isopropoxy-N-methylbenzylamine (see example 41) in 18% yield.
NMR-1H (CDCl3): δ (ppm) 7.38-7.12 (m, 3H); 7.01-6.84 (m, 5H); 4.59 (sept, 1H); 4.53 (d, 2H); 3.01-2.90 (m, 5H); 2.50 (t, 2H); 2.04-1.89 (m, 2H); 1.33 (t, 6H)
MS (ESI+): m/z=376 [M+H]+
Prepared from 4-[(4-fluorophenyl)thio]butanoic acid [18850-56-1] and N-methyl-2-(morpholin-4-yl)benzylamine [871217-44-6] in 44% yield.
NMR-1H (CDCl3): δ (ppm) 7.40-6.92 (m, 8H); 4.67 (s, 2H); 3.87-3.82 (m, 4H); 3.04-2.86 (m, 9H); 2.50 (dt, 2H); 2.08-1.92 (m, 2H)
MS (ESI+): m/z=403 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and 2-benzyl-N-methylbenzylamine [381237-13-4] in 50% yield.
NMR-1H (CDCl3): δ (ppm) 7.31-7.01 (m, 11H); 6.79-6.71 (m, 2H); 4.49 (d, 2H); 4.00 (s, 2H); 2.90-2.65 (m, 5H); 2.27-2.15 (m, 2H); 1.93-1.73 (m, 2H)
MS (ESI+): m/z=406 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and N-methyl-2-[4-(2-morpholin-4-ylethyl)piperazin-1-yl]benzylamine in 39% yield.
NMR-1H (CDCl3): δ (ppm) 7.29-7.00 (m, 6H); 6.77-6.70 (m, 2H); 4.62 (d, 2H); 3.74-3.71 (m, 4H); 2.97-2.73 (m, 9H); 2.69-2.36 (m, 14H); 2.02-1.84 (m, 2H)
MS (ESI+): m/z=513 [M+H]+
N-Methyl-2-[4-(2-morpholin-4-ylethyl)piperazin-1-yl]benzylamine was prepared according general procedure Z from commercial 2-fluorobenzaldehyde and commercial 1-(2-morpholinoethyl)piperazine.
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and 2-(4-benzylpiperazin-1-yl)-N-methylbenzylamine in 49% yield.
NMR-1H (CDCl3): δ (ppm) 7.35-7.00 (m, 11H); 6.77-6.70 (m, 2H); 4.64 (d, 2H); 3.61-3.59 (m, 2H); 2.95-2.43 (m, 15H); 2.01-1.85 (m, 2H)
MS (ESI+): m/z=490 [M+H]+
2-(4-Benzylpiperazin-1-yl)-N-methylbenzylamine was prepared according general procedure Y from commercial 2-(4-benzylpiperazin-1-yl)benzaldehyde.
Prepared from commercial 5-(4-hydroxyphenyl)pentanoic acid [85896-82-8] and N-methyl-2-(morpholin-4-yl)benzylamine [871217-44-6] in 75% yield.
NMR-1H (CDCl3): δ (ppm) 7.31-6.96 (m, 6H); 6.77-6.70 (m, 2H); 4.66 (d, 2H); 3.86-3.82 (m, 4H); 2.95-2.85 (m, 7H); 2.62-2.30 (m, 4H); 1.81-1.48 (m, 4H)
MS (ESI+): m/z=383 [M+H]+
Prepared from commercial 4-(4-fluorobenzoyl)butyric acid commercial 2-methoxy-N-methylbenzylamine in 46% yield.
NMR-1H (CDCl3): δ (ppm) 8.04-7.98 (m, 2H); 7.30-6.85 (m, 6H); 4.57 (d, 2H); 3.83-3.82 (m, 3H); 3.12-3.02 (m, 2H); 2.96-2.94 (m, 3H); 2.50 (t, 2H); 2.17-2.03 (m, 2H)
MS (ESI+): m/z=344 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and commercial N-methyl-2-biphenylmethylamine in 37% yield.
NMR-1H (CDCl3): δ (ppm) 7.48-7.15 (m, 11H); 6.77-6.72 (m, 2H); 4.52 (d, 2H); 2.89-2.69 (m, 5H); 2.27 (td, 2H); 1.96-1.79 (m, 2H)
MS (ESI+): m/z=392 [M+H]+
Prepared from commercial 5-(4-fluorophenyl)pentanoic acid and commercial 2-methoxy-N-methylbenzylamine in 67% yield.
NMR-1H (CDCl3): δ (ppm) 7.31-6.84 (m, 8H); 4.55 (d, 2H); 3.83-3.82 (m, 3H); 2.94 (s, 3H); 2.65-2.54 (m, 2H); 2.41-2.33 (m, 2H); 1.70-1.56 (m, 4H)
MS (ESI+): m/z=330 [M+H]+
Prepared from commercial 5-(4-hydroxyphenyl)pentanoic acid and 2-isopropoxy-N-methylbenzylamine (see example 41) in 53% yield.
NMR-1H (CDCl3): δ (ppm) 7.25-6.72 (m, 8H); 4.64-4.47 (m, 3H); 2.93 (s, 3H); 2.54 (d, 2H); 2.39 (t, 2H); 1.79-1.50 (m, 4H); 1.35-1.25 (m, 6H)
MS (ESI+): m/z=356 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and N-(2-hydroxyethyl)-2-methoxybenzylamine [109926-15-0] in 32% yield.
NMR-1H (CDCl3): δ (ppm) 7.33-7.12 (m, 3H); 7.04-6.72 (m, 5H); 4.61 (d, 2H); 3.83-3.41 (m, 8H); 2.82 (t, 2H); 2.54 (t, 2H); 1.91 (quint, 2H)
MS (ESI+): m/z=376 [M+H]+
Prepared from 4-[(4-fluorophenyl)methylamino]butanoic acid (see below) and 2-isopropoxy-N-methylbenzylamine (see example 41) in 53% yield.
NMR-1H (CDCl3): δ (ppm) 7.28-7.17 (m, 2H); 7.07-6.85 (m, 4H); 6.69-6.62 (m, 2H); 4.64-4.44 (m, 3H); 3.39-3.27 (m, 2H); 2.94-2.85 (m, 6H); 2.41-2.35 (m, 2H); 2.00-1.84 (m, 2H); 1.35-1.32 (m, 6H)
MS (ESI+): m/z=373 [M+H]+
4-[(4-fluorophenyl)methylamino]butanoic acid was prepared according general procedure X from commercial 4-fluoro-N-methylaniline and commercial ethyl 4-bromobutanoic acid.
Prepared from 4-[(4-fluorophenyl)methylamino]butanoic acid (see example 61) and N-methyl-2-(trifluoromethyl)benzylamine [296276-41-0] in 15% yield.
NMR-1H (CDCl3): δ (ppm) 7.71-7.64 (m, 1H); 7.58-7.16 (m, 3H); 7.05-6.84 (m, 2H); 6.72-6.60 (m, 2H); 4.75 (d, 2H); 3.27 (dt, 2H); 3.01-2.82 (m, 6H); 2.30 (dt, 2H); 2.05-1.81 (m, 2H)
MS (ESI+): m/z=383 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and 2-[4-(2-dimethylaminoethyl]piperazin-1-yl)-N-methylbenzylamine (see below) in 45% yield.
NMR-1H (CDCl3): δ (ppm) 7.30-7.18 (m, 3H); 7.13-7.03 (m, 3H); 6.73 (t, 2H); 4.59 (d, 2H); 2.92-2.65 (m, 9H); 2.56-2.32 (m, 16H); 1.99-1.85 (m, 2H)
MS (ESI+): m/z=471 [M+H]+
2-[4-(2-dimethylaminoethyl]piperazin-1-yl)-N-methylbenzylamine was prepared according general procedure Z from commercial 2-fluorobenzaldehyde and commercial 1-[4-(2-dimethylaminoethyl)]piperazine.
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and 2-methoxy-N-(2-morpholin-4-ylethyl)benzylamine [626209-57-2] in 35% yield.
NMR-1H (CDCl3): δ (ppm) 7.38-7.19 (m, 3H); 7.10 (d, 1H); 7.03-6.89 (m, 2H); 6.83-678 (m, 2H); 4.67 (d, 2H); 3.90-3.86 (d, 3H); 3.80-3.71 (m, 4H); 3.51 (dt, 2H); 2.96-2.84 (m, 2H); 2.67-2.51 (m, 8H); 2.09-1.92 (m, 2H)
MS (ESI+): m/z=445 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and 2-(methoxymethyl)-N-methylbenzylamine (see below) in 19% yield.
NMR-1H (CDCl3): δ (ppm) 7.32-7.05 (m, 6H); 6.74 (t, 2H); 4.66 (t, 2H); 4.44 (d, 2H); 3.37 (d, 3H); 2.93 (d, 3H); 2.86 (dt, 2H); 2.50 (dt, 2H); 2.04-1.86 (m, 2H)
MS (ESI+): m/z=360 [M+H]+
2-(Methoxymethyl)-N-methylbenzylamine was prepared according general procedure Y from 2-(methoxymethyl)benzaldehyde [106020-70-6].
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and N-cyclopropylmethyl-2-methoxybenzylamine [1019561-08-0] in 22% yield.
NMR-1H (CDCl3): δ (ppm) 7.34-6.77 (m, 8H); 4.72 (d, 2H); 3.89-3.83 (m, 3H); 3.26 (dd, 2H); 2.87 (dt, 2H); 2.59 (dt, 2H); 2.08-1.90 (m, 2H)
MS (ESI+): m/z=386 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and N-ethyl-2-methoxybenzylamine [62924-83-8] in 57% yield.
NMR-1H (CDCl3): δ (ppm) 7.31-7.18 (m, 3H); 713-6.82 (m, 3H); 6.78-6.73 (m, 2H); 4.55 (d, 2H); 3.85-3.80 (m, 3H); 3.44-3.27 (m, 2H); 2.89-2.76 (m, 2H); 2.58-2.44 (m, 2H); 2.03-1.85 (m, 2H); 1.18-1.05 (m, 3H)
MS (ESI+): m/z=360 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and 3-fluoro-2-methoxy-N-methylbenzylamine (see below) in 36% yield.
NMR-1H (CDCl3): δ (ppm) 7.26-7.21 (m, 3H); 7.07-6.94 (m; 3H); 6.82-6.74 (m; 2H); 4.59 (d, 2H); 3.96-3.90 (m, 3H); 2.95-2.80 (m, 5H); 2.54 (t, 2H); 2.03-1.87 (m, 2H)
MS (ESI+): m/z=364 [M+H]+
3-Fluoro-2-methoxy-N-methylbenzylamine was prepared according general procedure Y from 3-fluoro-2-methoxybenzaldehyde [74266-68-5].
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and 2-methoxy-3,N-dimethylbenzylamine (see below) in 46% yield.
NMR-1H (CDCl3): δ (ppm) 7.26-6.74 (m, 7H); 4.63 (d, 2H); 3.73-3.70 (m, 3H); 2.94-2.79 (m, 5H); 2.55 (t, 2H); 2.32-2.29 (m, 3H); 2.03-1.88 (m, 2H)
MS (ESI+): m/z=360 [M+H]+
2-Methoxy-3,N-dimethylbenzylamine was prepared according general procedure Y from 2-methoxy-3-methylbenzaldehyde [67639-61-6].
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and 5-chloro-2-methoxy-N-methylbenzylamine [823188-85-8] in 55% yield.
NMR-1H (CDCl3): δ (ppm) 7.29-7.12 (m, 3H); 7.01 (dd, 1H); 6.85-6.71 (m, 3H); 4.50 (d, 2H); 3.78 (d, 3H); 2.94 (d, 3H); 2.83 (dt, 2H); 2.58-2.46 (m, 2H); 2.03-1.84 (m, 2H)
MS (ESI+): m/z=380 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and 5-fluoro-2-methoxy-N-methylbenzylamine [823188-87-0] in 28% yield.
NMR-1H (CDCl3): δ (ppm) 7.31-7.19 (m, 2H); 7.02-6.70 (m, 5H); 4.53 (d, 2H); 3.80 (d, 3H); 2.96 (d, 3H); 2.92-2.78 (m, 2H); 2.53 (q, 2H); 2.02-1.85 (m, 2H)
MS (ESI+): m/z=364 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and 2-(morpholin-4-ylmethyl)-N-methylbenzylamine [871825-58-0] in 62% yield.
NMR-1H (CDCl3): δ (ppm) 7.28-7.01 (m, 6H); 6.75 (t, 2H); 4.79 (s, 2H); 3.67-3.65 (m, 4H); 3.47 (s, 2H); 3.00-2.75 (m, 5H); 2.61-2.41 (m, 6H); 1.99-1.79 (m, 2H)
MS (ESI+): m/z=415 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and 2-[4-(2-hydroxyethyl]piperazin-1-yl)-N-methylbenzylamine (see below) in 57% yield.
NMR-1H (CDCl3): δ (ppm) 7.47-7.26 (m, 6H); 6.96 (t, 2H); 4.89-4.76 (m, 2H); 3.89-3.86 (m, 2H); 3.13-2.60 (m, 15H); 2.20-2.02 (m, 2H); 1.53-1.13 (m, 2H)
MS (ESI+): m/z=444 [M+H]+
2-[4-(2-Hydroxyethyl]piperazin-1-yl)-N-methylbenzylamine was prepared according general procedure Y from 2-[4-(2-hydroxyethyl)piperazin-1-yl]benzaldehyde [628325-98-4].
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and 3,5-dichloro-2-methoxy-N-methylbenzylamine [869945-80-2] in 65% yield.
NMR-1H (CDCl3): δ (ppm) 7.36-7.22 (m, 3H); 6.98 (dd, 1H); 6.79-6.72 (m, 2H); 4.58 (d , 2H); 3.85-3.82 (m, 3H); 2.95-2.83 (m, 5H); 2.58-2.47 (m, 2H); 2.03-1.91 (m, 2H)
MS (ESI+): m/z=414/416 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and 2-methoxy-4,N-dimethylbenzylamine (see below) in 51% yield.
NMR-1H (CDCl3): δ (ppm) 7.28-7.22 (m, 2H); 7.05-6.67 (m, 5H); 4.52 (d, 2H); 3.82-3.79 (m, 3H); 2.93-2.80 (m, 5H); 2.57-2.48 (m, 2H); 2.36-2.33 (m, 3H); 2.01-1.87 (m, 2H)
MS (ESI+): m/z=360 [M+H]+
2-Methoxy-4,N-dimethylbenzylamine was prepared according general procedure Y from 2-methoxy-4-methylbenzaldehyde [57415-35-7].
(3S)-4-[(4-Fluorophenyl)thio]-3-hydroxy-N-(2-methoxybenzyl)-N-methylbutanamide
Prepared from (3S)-4-[(4-fluorophenyl)thio]-3-hydroxybutanoic acid (see below) and commercial 2-methoxy-N-methylbenzylamine in 55% yield.
NMR-1H (CDCl3): δ (ppm) 7.41-7.13 (m, 4H); 7.01-6.86 (m, 4H); 4.68-4.37 (m, 2H); 4.20-4.08 (m, 1H); 3.84-3.83 (m, 3H); 3.18-2.71 (m, 8H); 2.58-2.49 (m, 1H)
MS (ESI+): m/z=364 [M+H]+
(3S)-4-[(4-Fluorophenyl)thio]-3-hydroxybutanoic acid was prepared according general procedure X from commercial 4-fluorothiophenol and commercial ethyl (S)-(−)-4-chloro-3-hydroxybutanoate.
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and N-cyclopropyl-2-methoxy-benzylamine [625437-49-2] in 31% yield.
NMR-1H (CDCl3): δ (ppm) 7.34-7.13 (m, 3H); 7.05-6.96 (m, 1H); 6.94-6.8 (m, 2H); 6.79-6.70 (m, 2H); 4.62 (s, 2H), 3.87-3.76 (m, 3H); 2.83 (dt, 4H); 2.65-2.52 (m, 1H); 1.96 (t, 2H); 0.84-0.72 (m, 4H)
MS (ESI+): m/z=372 [M+H]+
Prepared from 4-[(4-fluorophenyl)methylamino]butanoic acid (see example 61) and N-methyl-2-(4-methylpiperazin-1-yl)benzylamine (see example 13) in 4% yield.
NMR-1H (CDCl3): δ (ppm) 7.35-6.97 (m, 4H); 6.98-6.82 (m, 2H); 6.73-6.51 (m, 2H); 4.60 (d, 2H); 3.32 (dt, 2H); 3.02-2.83 (m, 7H); 2.80 (s, 3H); 2.69-2.49 (m, 4H); 2.48-2.24 (m, 5H); 2.03-1.78 (m, 2H)
MS (ESI+): m/z=413 [M+H]+
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and N-methyl-2-[(1-methylpiperidin-4-yl)oxy]benzylamine (see below) in 15% yield.
NMR-1H (CDCl3): δ (ppm) 7.30-7.1 (m, 3H); 6.98-6.62 (m, 5H); 4.57 (s, 1H); 4.39 (s, 1H); 4.03-2.63 (m, 7H); 2.52-2.13 (m, 7H); 2.09-1.54 (m, 6H)
MS (ESI+): m/z=429 [M+H]+
2-[(1-Methylpiperidin-4-yl)oxy]benzonitrile [870062-43-4] (480 mg, 2.22 mmol) were charged in 20 mL of 50% aqueous formic acid, then Raney Nickel® (761 mg, 8.88 mmol) were added. The mixture was refluxed 3 days and salts were filtered after cooling. The filtrate was basified with NaOH 1N, extracted 3 times with ethyl acetate. The combined organic layers were dried on anhydrous MgSO4, filtered and concentrated in vacuo to give 415 mg (yield 85%) of 2-[(1-methylpiperidin-4-yl)oxy]benzaldehyde which was converted into N-methyl-2-[(1-methylpiperidin-4-yl)oxy]benzylamine with general procedure Y (yield 79%).
Prepared from 4-[(4-fluorophenyl)methylamino]butanoic acid (see example 61) and N-methyl-2-{4-[5-(trifluoromethyl)pyridin-2-yl]piperazin-1-yl}benzylamine (see below) in 70% yield.
NMR-1H (CDCl3): δ (ppm) 8.43 (s large, 1H); 7.77-7.60 (m, 1H); 7.39-7.02 (m, 4H); 7.00-6.80 (m, 2H); 6.79-6.55 (m, 3H); 4.69 (d, 2H); 3.92-3.63 (m, 4H); 3.34 (dt, 2H); 3.15-2.73 (m, 10H); 2.40 (dt, 2H); 2.07-1.83 (m, 2H)
MS (ESI+): m/z=544 [M+H]+
N-Methyl-2-{4-[5-(trifluoromethyl)pyridin-2-yl]piperazin-1-yl}benzylamine was prepared according general procedure Y from commercial 2-(4-[5-(trifluoromethyl)-2-pyridyl]piperazino)benzaldehyde.
Prepared from 4-(5-fluoro-2,3-dihydro-1H-indolyl-1-yl)butanoic acid (see below) and 2-isopropoxy-N-methylbenzylamine (see example 41) in 32% yield.
NMR-1H (CDCl3): δ (ppm) 7.40-6.60 (m, 6H); 6.55-6.24 (m, 1H); 4.55 (d, 2H); 3.43-3.20 (m, 2H); 3.18-2.83 (m, 7H); 2.48 (t, 2H); 2.06-1.87 (m, 2H); 1.38-1.20 (m, 7H)
MS (ESI+): m/z=385 [M+H]+
4-(5-Fluoro-2,3-dihydro-1H-indolyl-1-yl)butanoic acid was prepared according general procedure X from 5-fluoroindoline [2343-22-8] and commercial ethyl 4-bromobutanoic acid.
Prepared from 4-(5-fluoro-2,3-dihydro-1H-indolyl-1-yl)butanoic acid (see example 81) and commercial 2-methoxy-N-methylbenzylamine in 55% yield.
NMR-1H (CDCl3): δ (ppm) 7.38-7.10 (m, 1H); 7.07-6.62 (m, 5H); 6.51-6.28 (m, 1H); 4.56 (d, 2H); 3.82 (d, 3H); 3.41-3.22 (m, 2H); 3.17-2.73 (m, 7H); 2.53-2.40 (m, 2H); 2.12-1.85 (m, 2H);
MS (ESI+): m/z=357 [M+H]+
Prepared from 4-[(4-fluorophenyl)thio]butanoic acid (see below) and 2,5-difluoro-N-methylbenzylamine [392691-70-2] in 68% yield.
NMR-1H (CDCl3): δ (ppm) 7.38-7.28 (m, 2H); 7.02-6.78 (m, 5H); 4.56 (d, 2H); 3.00-2.91 (m, 5H); 2.54-2.48 (m, 2H); 2.04 (m, 2H); 2.04-1.93 (m, 2H)
MS (ESI+): m/z=354 [M+H]+
4-[(4-Fluorophenyl)thio]butanoic acid was prepared according general procedure X from commercial 4-fluorothiophenol and commercial ethyl 4-butanoic acid.
Prepared from 4-[(4-fluorophenyl)thio]butanoic acid (see example 83) and 5-fluoro-2-methoxy-N-methylbenzylamine [823188-87-0] in 69% yield.
NMR-1H (CDCl3): δ (ppm) 7.46-7.23 (m, 2H), 7.09-6.68 (m, 5H); 4.48 (d, 2H); 3.73 (d, 3H); 2.97-2.77 (m, 5H); 2.50 (quint, 2H); 1.98 (sept, 2H)
MS (ESI+): m/z=366 [M+H]+
Prepared from 4-[(4-fluorophenyl)thio]butanoic acid (see example 83) and 5-fluoro-2-isopropoxy-N-methylbenzylamine (see below) in 74% yield.
NMR-1H (CDCl3): δ (ppm) 7.40-7.25 (m, 2H); 7.04-6.69 (m, 5H); 4.50 (d+sept, 3H); 2.96 (dt, 2H); 2.93 (d, 3H); 2.50 (dt, 2H); 2.07-1.88 (m, 2H); 1.32 (t, 6H)
MS (ESI+): m/z=394 [M+H]+
5-Fluoro-2-isopropoxy-N-methylbenzylamine was prepared according general procedure Y from 5-fluoro-2-isopropoxybenzaldehyde [610797-48-3].
Prepared from 4-[(4-fluorophenyl)thio]butanoic acid (see example 83) and N-methyl-1H-indole-7-methanamine [709649-74-1] in 62% yield.
NMR-1H (CDCl3): δ (ppm) 10.13 (s large, 1H); 7.66-7.62 (m, 1H); 7.32-7.21 (m, 3H); 7.05-6.91 (m, 4H); 6.55-6.53 (m, 1H); 4.74 (s, 2H); 2.97-2.91 (m, 5H); 2.50-2.44 (t, 2H); 2.05-1.89 (m, 2H)
MS (ESI+): m/z=357 [M+H]+
N-(5-Fluoro-2-methoxybenzyl)-4-[(4-methoxyphenyl)thio]-N-methylbutanamide
Prepared from 4-[(4-methoxyphenyl)thio]butanoic acid [52872-94-3] and 5-fluoro-2-methoxy-N-methylbenzylamine [823188-87-0] in 53% yield.
NMR-1H (CDCl3): δ (ppm) 7.40-7.24 (m, 2H); 7.02-6.70 (m, 5H); 4.51 (d, 2H); 3.87-3.72 (m, 6H); 3.00-2.88 (m, 5H); 2.59-2.40 (m, 2H); 2.05-1.83 (m, 2H)
MS (ESI+): m/z=378 [M+H]+
Prepared from 4-[(4-fluorophenyl)thio]butanoic acid (see example 83) and 2,6-dimethoxy-N-methylbenzylamine [958863-63-3] in 49% yield.
NMR-1H (CDCl3): δ (ppm) 7.40-7.21 (m, 3H); 7.02-6.95 (m, 2H); 6.57-6.54 (m, 2H); 4.62 (d, 2H); 3.81-3.78 (m, 6H); 3.03-2.98 (m, 2H); 2.80-2.72 (m, 5H); 2.07-1.95 (m, 2H)
MS (ESI+): m/z=378 [M+H]+
Prepared from 4-[(4-fluorophenyl)thio]butanoic acid (see example 83) and 2-fluoro-5-methoxy-N-methylbenzylamine (see below) in 62% yield.
NMR-1H (CDCl3): δ (ppm) 7.37-7.28 (m, 2H); 7.04-6.92 (m, 2H); 6.80-6.58 (m, 2H); 4.56 (d, 2H); 3.75-3.74 (m, 3H); 3.00-2.91 (m, 5H); 2.54-2.47 (m, 2H); 2.04-1.90 (m, 2H)
MS (ESI+): m/z=366 [M+H]+
2-Fluoro-5-methoxy-N-methylbenzylamine was prepared according general procedure Y from commercial 2-fluoro-5-methoxybenzaldehyde.
Prepared from 4-[(4-fluorophenyl)thio]butanoic acid (see example 83) and 2-allyloxy-N-methylbenzylamine [869941-98-0] in 51% yield.
NMR-1H (CDCl3): δ (ppm) 7.41-7.13 (m, 4H); 7.06-6.81 (m, 4H); 6.16-5.96 (m, 1H); 5.49-5.24 (m, 2H); 4.70-4.47 (m, 4H), 3.05-2.85 (m, 5H); 2.58-2.43 (m, 2H); 2.08-1.86 (m, 2H)
MS (ESI+): m/z=374 [M+H]+
Prepared from 4-[(4-fluorophenyl)thio]butanoic acid (see example 83) and 5-allyl-2-hydroxy-3-methoxy-N-methylbenzylamine (see below) in 25% yield.
NMR-1H (CDCl3): δ (ppm) 8.94 (s, 1H); 7.34-7.28 (m, 2H); 6.99-6.90 (m, 2H); 6.98-6.44 (m, 2H); 6.02-5.86 (m, 1H); 5.10-5.03 (m, 2H); 5.49-4.43 (m, 2H); 3.88-3.85 (m, 3H); 3.31-3.28 (m, 2H); 2.99-2.89 (m, 5H); 2.57-2.43 (m, 2H)
MS (ESI+): m/z=404 [M+H]+
5-Allyl-2-hydroxy-3-methoxy-N-methylbenzylamine was prepared according general procedure Y from commercial 5-allyl-2-hydroxy-3-methoxy-N-methylbenzaldehyde.
Prepared from 4-[(4-fluorophenyl)thio]butanoic acid (see example 83) and 5-bromo-2-methoxy-N-methylbenzylamine [137469-70-6] in 7% yield.
NMR-1H (CDCl3): δ (ppm) 7.40-7.28 (m, 3H); 7.21-7.09 (m, 1H); 7.02-6.92 (m, 2H); 6.78-6.71 (m, 1H); 4.50 (d, 2H); 3.82-3.80 (m, 3H); 3.01-2.90 (m, 5H); 2.55-2.45 (m, 2H); 2.05-1.89 (m, 2H)
MS (ESI+): m/z=426/428 [M+H]+
Prepared from 4-{[4-(methylsulfonylamino)phenyl]thio}butanoic acid (see below) and commercial 2-methoxy-N-methylbenzylamine in 72% yield.
NMR-1H (CDCl3): δ (ppm) 7.50-6.90 (m, 8H); 4.65 (d, 2H); 3.93 (d, 3H); 3.21-2.96 (m, 8H); 2.62 (t, 2H); 2.19-1.99 (m, 2H)
MS (ESI+): m/z=423 [M+H]+
Step 1: ethyl 4-[(4-aminophenyl)thio]butanoate
Prepared from commercial 4-aminothiophenol and commercial ethyl 4-bromobutanoate according general procedure X step 1 in 5% yield.
Step 2: ethyl 4-{[4-(methylsulfonylamino)phenyl]thio}butanoate
To a solution of ethyl 4-[(4-aminophenyl)thio]butanoate (100 mg, 0.418 mmol) in 2 mL of dichloromethane were added methanesulfonyl chloride (48 mg, 0.418 mmol) and triethylamine (58.3 μL, 0.418 mmol). The mixture was stirred overnight at room temperature, then refluxed 5 hours. After cooling, water was added and the mixture was extracted 3 times with ethyl acetate, the combined organic layers were washed with brine, dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (cyclohexane/ethyl acetate 8/2) to give 63 mg (yield 47%) of the sulfonamide.
Step 3: 4-{[4-(methylsulfonylamino)phenyl]thio}butanoic acid
Prepared from ethyl 4-[(4-aminophenyl)thio]butanoate according general procedure X step 2 in 80% yield.
Prepared from 4-[(4-fluorophenyl)methylamino]butanoic acid (see below) and commercial 2-methoxy-N-methylbenzylamine in 42% yield.
NMR-1H (CDCl3): δ (ppm) 7.33-7.14 (m, 2H); 7.04-6.84 (m, 4H); 6.72-6.59 (m, 2H); 4.55 (d, 2H); 3.83 (s, 3H); 3.41-3.24 (m, 2H); 2.90 (dd, 6H); 2.43-2.32 (m, 2H); 2.02-1.82 (m, 2H)
MS (ESI+): m/z=345 [M+H]+
4-[(4-Fluorophenyl)methylamino]butanoic acid was prepared according general procedure X from commercial 4-fluoro-N-methylaniline and commercial ethyl 4-bromobutanoic acid.
Prepared from 4-[(4-fluorophenyl)thio]butanoic acid (see example 83) and 2-(2-furyl)-N-methylbenzylamine (see below) in 57% yield.
NMR-1H (CDCl3): δ (ppm) 7.63-7.50 (m, 2H); 7.37-7.26 (m, 4H); 7.19-7.11 (m, 1H); 6.99-6.94 (m, 2H); 6.53-6.48 (d, 2H); 4.83-4.72 (d, 2H), 3.05-2.85 (m, 5H); 2.58-2.43 (m, 2H); 2.08-1.86 (m, 2H)
MS (ESI+): m/z=384 [M+H]+
2-(2-furyl)-N-methylbenzylamine was prepared according to general procedure Y from commercial 2-(2-furyl)benzaldehyde [16191-32-5] in 52% yield.
Prepared from 4-[(4-fluorophenyl)thio]butanoic acid (see example 83) and N-[(6-fluoro-4H-1,3-benzodioxin-8-yl)methyl]-N-methylamine (see below) in 78% yield.
NMR-1H (CDCl3): δ (ppm) 7.38-7.25 (m, 2H); 7.09-6.89 (m, 2H); 6.79-6.75 (d, 1H); 6.66-6.59 (t, 1H); 5.25-5.22 (d, 2H); 4.90-4.86 (d, 2H); 4.54 (s, 1H); 4.45 (s, 1H); 2.89-2.87 (m, 5H); 2.56-2.43 (m, 2H); 2.06-1.91 (m, 2H)
MS (ESI+): m/z=394 [M+H]+
2-(2-furyl)-N-methylbenzylamine was prepared according to general procedure Y from commercial 6-fluoro-4H-1,3-benzodioxine-8-carbaldehyde [306934-87-2] in 82% yield.
Prepared from 4-[(4-fluorophenyl)thio]butanoic acid (see example 83) and N-(2-methoxy-5-methylbenzyl)-N-methylamine (see below) in 68% yield.
NMR-1H (CDCl3): δ (ppm) 7.38-7.25 (m, 2H); 7.23-6.92 (m, 3H); 6.91-6.75 (m, 2H); 4.58-4.45 (d, 2H); 3.81 (m, 3H); 3.11-2.87 (m, 5H); 2.58-2.47 (t, 2H); 2.28-2.23 (m, 3H); 2.12-1.86 (m, 2H)
MS (ESI+): m/z=362 [M+H]+
Step 1: 2-hydroxy-5-methylbenzaldehyde [613-84-3] was suspended in 5 ml of dichloromethane and 5 ml of water. 1.47 ml (4.4 mmol, 3 eq.) of sodium hydroxide 1N and 1.52 g (2.94 mmol, 2 eq.) of tetrabutyl ammonium hydroxide 50%, then iodomethane (457 μL, 5 eq.) were added to the solution. The mixture was stirred 3 h at room temperature. The reaction mixture was extracted 3 times with dichloromethane, the combined organic layers were washed with brine, dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (cyclohexane/ethyl acetate 9/1) to give 215 mg (yield 97%) of 2-methoxy-5-methylbenzaldehyde.
Step 2: N-(2-methoxy-5-methylbenzyl)-N-methylamine was prepared according to general procedure Y from 2-methoxy-5-methylbenzaldehyde in 68% yield.
Prepared from 4-[(4-fluorophenyl)thio]butanoic acid (see example 83) and N-[5-methoxy-2-(1H-pyrazol-1-yl)benzyl]-N-methylamine in 78% yield.
N-[5-methoxy-2-(1H-pyrazol-1-yl)benzyl]-N-methylamine was prepared according to general procedure Y from commercial 5-methoxy-2-(1H-pyrazol-1-yl)benzaldehyde [1015845-56-3] in 78% yield.
NMR-1H (CDCl3): δ (ppm) 7.71-7.65 (dd, 1H); 7.57-7.52 (dd, 1H); 7.41-7.21 (m, 3H); 7.05-6.72 (m, 4H); 6.45-6.38 (dd, 1H); 4.45-4.39 (d, 2H); 3.79 (m, 3H); 3.03-2.75 (m, 5H); 2.51-2.30 (m, 2H); 2.02-1.86 (m, 2H)
MS (ESI+): m/z=414 [M+H]+
4-[(4-fluorophenyl)thio]-N-[5-methyl-2-(pyrazol-1-yl)benzyl]-N-methylbutanamide Prepared from 4-[(4-fluorophenyl)thio]butanoic acid (see example 83) and N-[5-methyl-2-(1H-pyrazol-1-yl)benzyl]-N-methylamine in 49% yield.
N-[5-methyl-2-(1H-pyrazol-1-yl)benzyl]-N-methylamine was prepared according to general procedure Y from commercial 5-methyl-2-(1H-pyrazol-1-yl)benzaldehyde [956723-07-2] in 70% yield.
NMR-1H (CDCl3): δ (ppm) 7.73-7.68 (dd, 1H); 7.61-7.56 (dd, 1H); 7.39-7.23 (m, 2H); 7.23-7.07 (m, 3H); 7.04-6.90 (m, 2H); 6.46-6.41 (dd, 1H); 4.51-4.47 (d, 2H); 3.05-2.78 (m, 5H); 2.50-2.34 (m, 5H); 2.05-1.87 (m, 2H)
MS (ESI+): m/z=398 [M+H]+
Prepared from 4-[(4-fluorophenyl)thio]butanoic acid (see example 83) and N-(5-chloro-2-methoxy-3-methylbenzyl)-N-methylamine (see below) in 30% yield.
NMR-1H (CDCl3): δ (ppm) 7.38-7.25 (m, 3H); 7.12-6.84 (m, 3H); 4.62-4.50 (d, 2H); 3.70 (s, 3H); 3.02-2.89 (m, 5H); 2.58-2.45 (m, 2H); 2.29-2.25 (m, 3H); 2.06-1.92 (m, 2H)
MS (ESI+): m/z=396 [M+H]+
Step 1: 5-chloro-2-hydroxy-3-methylbenzaldehyde [23602-63-3] was suspended in 5 ml of dichloromethane and 5 ml of water. 1.47 ml (4.4 mmol, 3 eq.) of sodium hydroxide 1N and 1.52 g (2.94 mmol, 2 eq.) of tetrabutyl ammonium hydroxide 50%, then iodomethane (457 μL, 5 eq.) were added to the solution. The mixture was stirred 3 h at room temperature. The reaction mixture was extracted 3 times with dichloromethane, the combined organic layers were washed with brine, dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (dichloromethane) to give 100 mg (yield 93%) of 5-chloro-2-methoxy-3-methylbenzaldehyde.
Step 2: N-(5-chloro-2-methoxy-3-methylbenzyl)-N-methylamine was prepared according to general procedure Y from 5-chloro-2-methoxy-3-methylbenzaldehyde in 80% yield.
Prepared from 4-[(4-fluorophenyl)thio]butanoic acid (see example 83) and N-[2-(allyloxy)-5-chlorobenzyl]-N-methylamine in 57% yield.
N-[2-(allyloxy)-5-chlorobenzyl]-N-methylamine was prepared according to general procedure Y from commercial 2-(allyloxy)-5-chlorobenzaldehyde [152842-93-8] in 67% yield.
NMR-1H (CDCl3): δ (ppm) 7.39-6.92 (m, 6H); 6.78 (t, 1H); 6.09-5.96 (m, 1H); 5.43-5.25 (m, 2H); 4.58-4.47 (m, 4H); 3.02-2.90 (m, 5H); 2.57-2.44 (m, 2H); 2.06-1.91 (m, 2H)
MS (ESI+): m/z=408 [M+H]+
Step 1: N-(5-fluoro-2-methoxyphenyl)-4-[(4-fluorophenyl)thio]butanamide was prepared from 4-[(4-fluorophenyl)thio]butanoic acid (see example 83) and 5-fluoro-2-methoxyaniline [1978-39-8] in 6% yield.
Step 2: to a solution of 30 mg (0.089 mmol) of 4-[(4-fluorophenyl)thio]-N-isoquinolin-1-ylbutanamide in 2 mL of anhydrous N,N-dimethylformamide were added 2 mg (0.098 mmol) of sodium hydride (60% dispersion in mineral oil). The mixture was stirred 1 h at room temperature and 11 μL (0.177 mmol) of iodomethane were added. The mixture was stirred 12 hours at room temperature then water was added. The resulting mixture was extracted 3 times with ethyl acetate, the combined organic layers were dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (cyclohexane/ethyl acetate 7/3) to give 9.5 mg (31% yield) of N-(5-fluoro-2-methoxyphenyl)-4-[(4-fluorophenyl)thio]-N-methylbutanamide.
NMR-1H (CDCl3): δ (ppm) 7.25 (t, 2H); 7.08-6.85 (m, 5H); 3.78 (s, 3H); 3.13 (s, 3H); 2.82 (t, 2H); 2.17-2.07 (m, 2H); 1.90-1.78 (m, 2H)
MS (ESI+): m/z=352 [M+H]+
N-(5-fluoro-2-methoxybenzyl)-4-[(4-hydroxyphenyl)sulfinyl]-N-methylbutanamide
Prepared by oxidation of compound of example 71 as follows:
To a solution of compound of example 71 (260 mg, 0.71 mmol) in 10 mL of dichloromethane was added m-chloroperbenzoic acid (116 mg, 0.67 mmol). The mixture was stirred 10 min at room temperature. 25 ml of a saturated NaHCO3 solution was added to the reaction mixture. The resulting mixture was extracted 3 times with dichloromethane, dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (dichloromethane) to give 251 mg (yield 93%) of N-(5-fluoro-2-methoxybenzyl)-4-[(4-hydroxyphenyl)sulfinyl]-N-methylbutanamide.
NMR-1H (CDCl3): δ (ppm) 7.42-7.37 (dd, 2H); 7.02-6.63 (m, 5H); 4.55-4.45 (d, 2H); 3.80-3.77 (d, 3H); 2.98-2.90 (m, 5H); 2.55-2.51 (m, 2H); 2.06-1.92 (m, 2H)
MS (ESI+): m/z=380 [M+H]+
N-(5-fluoro-2-methoxybenzyl)-4-[(4-methoxyphenyl)sulfinyl]-N-methylbutanamide
Prepared by oxidation of compound of example 87 as follows:
To a solution of compound of example 87 (2 g, 5.29 mmol) in 20 mL of dichloromethane was added m-chloroperbenzoic acid (869 mg, 5.03 mmol). The mixture was stirred 3 h at room temperature. 25 ml of a saturated NaHCO3 solution was added to the reaction mixture. The resulting mixture was extracted 3 times with dichloromethane, dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (dichloromethane/ethyl acetate 95/5) to give 1.5 g (yield 72%) of N-(5-fluoro-2-methoxybenzyl)-4-[(4-methoxyphenyl)sulfinyl]-N-methylbutanamide.
NMR-1H (CDCl3): δ (ppm) 7.55 (t, 2H); 7.03-6.64 (m, 5H); 4.55-4.44 (d, 2H); 3.84-3.78 (m, 6H); 2.96-2.78 (m, 5H); 2.57-2.44 (m, 2H); 2.14-1.91 (m, 2H)
MS (ESI+): m/z=394 [M+H]+
Prepared from 4-(5-cyano-1H-indol-1-yl) butanoic acid (see below) and 5-fluoro-2-methoxy-N-methylbenzylamine [823188-87-0] according to procedure B in 44% yield.
NMR-1H (CDCl3): δ (ppm) 7.94 (d, 1H); 7.45-7.36 (m, 2H); 7.25-7.20 (m, 1H); 6.98-6.53 (m, 4H); 4.58 (s, 1H); 4.32-4.25 (m, 3H); 3.77 (d, 3H); 2.97 (s, 2H); 2.81 (s, 1H); 2.29-2.12 (m, 4H)
MS (ESI+): m/z=380 [M+H]+
Step 1: Commercial 5-cyanoindole (483 mg, 3.40 mmol) ware added to 2.5 mL of concentrated sodium hydroxide followed by 5 mL of dichloromethane, (730 μL, 5.10 mmol) of ethyl 4-bromobutanoate and (2.2 g, 3.40 mmol) of tetrabutylammonium hydroxide. The mixture was stirred 6 h at room temperature then water was added. The resulting mixture was extracted 3 times with dichloromethane, dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was added to 1N hydrochloric acid and the resulting mixture was extracted 3 times with ethyl acetate, dried with anhydrous MgSO4, filtered and concentrated in vacuo to give 797 mg (100%) of 4-(5-cyano-1H-indol-1-yl) butanoic acid.
Prepared from 4-(5-fluoro-1H-indol-1-yl) butanoic acid (see example 106) and 5-fluoro-2-methoxy-N-methylbenzylamine [823188-87-0] according to procedure B in 33% yield.
NMR-1H (CDCl3): δ (ppm) 7.27-7.15 (m, 2H); 7.08-7.01 (dd, 1H); 6.93-6.80 (m, 2H); 6.78-6.58 (m, 2H); 6.37 (dd, 1H); 4.53 (s, 1H); 4.25-4.12 (m, 3H); 3.71 (d, 3H); 2.81 (d, 3H); 2.22-2.11 (m, 4H)
MS (ESI+): m/z=373 [M+H]+
Prepared from 4-(5-chloro-1H-indol-1-yl) butanoic acid (see example 106) and 5-fluoro-2-methoxy-N-methylbenzylamine [823188-87-0] according to procedure B in 63% yield.
NMR-1H (CDCl3): δ (ppm) 7.57 (dd, 1H); 7.27 (dd, 1H); 7.17-7.05 (m, 2H); 6.99-6.66 (m, 3H); 6.42 (dd, 1H); 4.58 (s, 1H); 4.30-4.19 (m, 3H); 3.77 (d, 3H); 2.87 (d, 3H); 2.23-2.10 (m, 4H)
MS (ESI+): m/z=389 [M+H]+
Prepared from 4-(5-bromo-1H-indol-1-yl) butanoic acid (see example 106) and 5-fluoro-2-methoxy-N-methylbenzylamine [823188-87-0] according to procedure B in 82% yield.
NMR-1H (CDCl3): δ (ppm) 7.73 (dd, 1H); 7.24 (dd, 2H); 7.06 (dd, 1H); 6.98-6.63 (m, 3H); 6.41 (dd, 1H); 4.58 (s, 1H); 4.30-4.12 (m, 3H); 3.77 (d, 3H); 2.88 (d, 3H); 2.23-2.07 (m, 4H)
MS (ESI+): m/z=434 [M+H]+
N-(5-fluoro-2-methoxybenzyl)-4-(5-methoxy-1H-indol-1-yl)-N-methylbutanamide
NMR-1H (CDCl3): δ (ppm) 7.24 (dd, 1H); 7.09-6.99 (m, 1H); 6.98-6.67 (m, 5H); 6.40 (dd, 1H); 4.58 (s, 1H); 4.30-4.14 (m, 3H); 3.85 (s, 3H); 3.76 (d, 3H); 2.86 (d, 3H); 2.31-2.12 (m, 4H)
MS (ESI+): m/z=385 [M+H]+
Copper iodide (132 mg, 0.692 mmol) and 600 μL of 30% sodium methoxide were added to a solution of 4-(5-bromo-1H-indol-1-yl)-N-(5-fluoro-2-methoxybenzyl)-N-methylbutanamide in 2 mL of anhydrous N,N-dimethylformamide. The mixture was heated at 150° C. for 20 min under microwave irradiation. The reaction mixture was filtered and poured into water. The resulting mixture was extracted 3 times with dichloromethane, dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (dichloromethane/ethyl acetate 98/2) to give 40 mg (yield 30%) of N-(5-fluoro-2-methoxybenzyl)-4-(5-methoxy-1H-indol-1-yl)-N-methylbutanamide.
Prepared from 4-(4-cyano-1H-indol-1-yl) butanoic acid (see below) and 5-fluoro-2-methoxy-N-methylbenzylamine [823188-87-0] according to procedure B in 54% yield.
NMR-1H (CDCl3): δ (ppm) 7.63 (dd, 1H); 7.45 (dd, 1H); 7.26-7.16 (m, 2H); 6.98-6.62 (m, 4H); 4.59 (s, 1H); 4.32-4.25 (m, 3H); 3.77 (d, 3H); 2.86 (d, 3H); 2.28-2.16 (m, 4H)
MS (ESI+): m/z=380 [M+H]+
NMR-1H (CDCl3): δ (ppm) 7.31-7.20 (m, 2H); 7.11-7.06 (m, 2H); 7.01-6.67 (m, 3H); 4.56-4.45 (d, 2H); 3.85-3.79 (m, 3H); 3.03-2.91 (m, 5H); 2.56-2.45 (m, 2H); 2.31 (t, 3H); 2.07-1.94 (m, 2H)
MS (ESI+): m/z=362 [M+H]+
Prepared from 4-[(4-methylphenyl)thio]butanoic acid (see below) and 5-fluoro-2-methoxy-N-methylbenzylamine [823188-87-0] in 75% yield according to general procedure B.
Step 1: Anhydrous potassium carbonate (834 mg, 6 mmol) and ethyl 4-bromobutanoate (634 μL, 4.43 mmol) were added to a solution of 4-methylbenzene thiol (500 mg, 4.02 mmol) in 5 mL acetonitrile. The mixture was refluxed 4 h then water and ethyl acetate were added after cooling. The mixture was extracted 3 times with ethyl acetate, the combined organic layers were washed with brine, dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography (silica gel) with (cyclohexane/ethyl acetate 98/2) to give 910 mg (95% yield) of ethyl-4-[(4-methylphenyl)thio]butanoate.
Step 2: 2.9 mL of 4N sodium hydroxide were added to a solution of 910 mg (3.82 mmol) of ethyl-4-[(4-methylphenyl)thio]butanoate in 5 mL of methanol. The mixture was stirred 2 h at room temperature then concentrated in vacuo. Water was added then 6N hydrochloric acid. The formed precipitate was filtered to give 792 mg of 4-[(4-methylphenyl)thio]butanoic acid in 99% yield.
4-[(4-chlorophenyl)thio]-N-(5-fluoro-2-methoxybenzyl)-N-methylbutanamide Prepared from 4-[(4-chlorophenyl)thio]butanoic acid (see example 111) and 5-fluoro-2-methoxy-N-methylbenzylamine [823188-87-0] in 61% yield according to general procedure B.
NMR-1H (CDCl3): δ (ppm) 7.28-7.20 (m, 4H); 7.01-6.72 (m, 3H); 4.57-4.45 (d, 2H); 3.85-3.79 (m, 3H); 3.04-2.92 (m, 5H); 2.58-2.45 (m, 2H); 2.07-1.94 (m, 2H)
MS (ESI+): m/z=382 [M+H]+
Prepared by alkylation of example 70.
NMR-1H (CDCl3): δ (ppm) 7.35-6.97 (m, 4H); 6.84-6.73 (m, 3H); 4.55-4.45 (m, 3H); 3.83-3.79 (m, 3H); 2.95-2.82 (m, 5H); 2.55-2.45 (m, 2H); 2.02-1.89 (m, 2H); 1.33-1.30 (d, 6H)
MS (ESI+): m/z=422 [M+H]+
N-(5-chloro-2-methoxybenzyl)-4-[(4-hydroxyphenyl)thio]-N-methylbutanamide was added to a suspension of sodium hydride 60% (10.5 mg, 0.263 mmol) in 3 mL of anhydrous dimethyl formamide. The mixture was stirred for 30 min at room temperature. 2-Iodopropane (29 μL, 0.29 mmol) was added and the mixture was heated to 100° C. for 3 h then cooled to room temperature overnight. Water was added. The resulting mixture was extracted 3 times with ethyl acetate, the combined organic layers were dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (cyclohexane/ethyl acetate 8/2) to give 25 mg (23% yield) of N-(5-chloro-2-methoxybenzyl)-4-[(4-isopropoxyphenyl)thio]-N-methylbutanamide.
Prepared from 4-[(4-methoxyphenyl)thio]butanoic acid [52872-94-3] and N-[5-methyl-2-(1H-pyrazol-1-yl)benzyl]-N-methylamine in 59% yield.
NMR-1H (CDCl3): δ (ppm) 7.71 (dd, 1H); 7.59 (dd, 1H); 7.38-7.00 (m, 5H); 6.82 (t, 2H); 6.44 (dd, 1H); 4.49 (d, 2H); 3.78 (s, 3H); 2.95-2.78 (m, 5H); 2.50-2.34 (m, 5H); 2.00-1.87 (m, 2H)
MS (ESI+): m/z=410 [M+H]+
N-[5-methyl-2-(1H-pyrazol-1-yl)benzyl]-N-methylamine was prepared according to general procedure Y from commercial 5-methyl-2-(1H-pyrazol-1-yl)benzaldehyde [956723-07-2] in 70% yield.
Prepared from 4-[(4-methoxyphenyl)thio]butanoic acid [52872-94-3] and N-(5-chloro-2-methoxybenzyl)-N-methylamine [823188-85-8] in 48% yield.
NMR-1H (CDCl3): δ (ppm) 7.32 (dd, 2H); 7.22-7.15 (m, 1H); 7.03 (dd, 1H); 6.86-6.75 (m, 3H); 4.50 (d, 2H); 3.85-3.77 (m, 6H); 2.97-2.82 (m, 5H); 2.55-2.45 (m, 2H); 2.04-1.89 (m, 2H)
MS (ESI+): m/z=394 [M+H]+
Prepared by oxidation of compound of example 115 according to procedure used for example 104 in 55% yield.
NMR-1H (CDCl3): δ (ppm) 7.54 (dd, 2H); 7.24-7.14 (m, 1H); 7.05-6.91 (m, 3H); 6.78 (t, 1H); 4.78 (d, 2H); 3.85-3.77 (m, 6H); 2.95-2.80 (m, 5H); 2.58-2.45 (m, 2H); 2.13-1.82 (m, 2H)
MS (ESI+): m/z=410 [M+H]+
Prepared from 4-[(4-methoxyphenyl)thio]butanoic acid [52872-94-3] and N-(5-fluoro-2-isopropoxybenzyl)-N-methylamine in 77% yield.
NMR-1H (CDCl3): δ (ppm) 7.34 (d, 1H); 7.31 (d, 1H); 6.99-6.68 (m, 5H); 4.50 (d, 3H); 3.79 (s, 3H); 2.95-2.87 (m, 5H); 2.59-2.42 (m, 2H); 2.00-1.86 (m, 2H); 1.36-1.24 (m, 6H)
MS (ESI+): m/z=406 [M+H]+
N-(5-fluoro-2-isopropoxybenzyl)-N-methylamine was prepared according to general procedure Y from 5-fluoro-2-isopropoxybenzaldehyde (see below) in 81% yield.
1 g (7.14 mmol) of 2-hydroxy-5-methylbenzaldehyde [613-84-3] was suspended in 30 mL of dichloromethane and 30 mL of water. 21.4 mL (21.41 mmol, 3 eq.) of sodium hydroxide 1N and 9.3 g (14.27 mmol, 2 eq.) of tetrabutyl ammonium hydroxide 50%, then 2-iodopropane (3.6 mL, 5 eq.) were added to the solution. The mixture was stirred 12 h at room temperature. The reaction mixture was extracted 3 times with dichloromethane, the combined organic layers were washed with brine, dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (cyclohexane/ethyl acetate 98/2) to give 1.26 g (yield 97%) of 5-fluoro-2-isopropoxybenzaldehyde.
Prepared by oxidation of compound of example 117 according to procedure used for example 104 in 96% yield.
NMR-1H (CDCl3): δ (ppm) 7.49 (dd, 2H); 6.94 (dd, 2H); 6.90-6.65 (m, 3H); 4.49-4.36 (m, 3H); 3.78 (s, 3H); 2.93-2.78 (m, 5H); 2.59-2.42 (m, 2H); 2.08-1.86 (m, 2H); 1.32-1.18 (m, 6H)
MS (ESI+): m/z=422 [M+H]+
Prepared from 4-[(4-methoxyphenyl)thio]butanoic acid [52872-94-3] and N-(2-methoxy-5-methylbenzyl)-N-methylamine (see example 97) in 69% yield.
NMR-1H (CDCl3): δ (ppm) 7.38-7.26 (m, 2H); 7.16-6.97 (m, 2H); 6.88-6.74 (m, 3H); 4.52 (d, 2H); 3.81 (s, 3H); 3.78 (d, 3H), 2.94-2.85 (m, 5H); 2.50 (t, 2H); 2.26 (d, 3H); 2.08-1.86 (m, 2H)
MS (ESI+): m/z=374 [M+H]+
Prepared from 4-(5-fluoro-1H-indol-1-yl) butanoic acid (see example 105) and N-(2-methoxy-5-methylbenzyl)-N-methylamine (see example 97) in 73% yield.
NMR-1H (CDCl3): δ (ppm) 7.32-7.21 (m, 2H); 7.12-6.72 (m, 5H); 6.42 (dd, 1H); 4.60 (s, 1H); 4.33 (s, 1H); 4.26-4.16 (m, 2H); 3.75 (d, 3H); 2.86 (d, 3H); 2.34-2.11 (m, 7H)
MS (ESI+): m/z=369 [M+H]+
Prepared from 4-(6-fluoro-1H-indol-1-yl) butanoic acid (see example 105) and N-(2-methoxy-5-methylbenzyl)-N-methylamine (see example 97) in 31% yield.
NMR-1H (CDCl3): δ (ppm) 7.55-7.46 (m, 1H); 7.12-6.72 (m, 6H); 6.44 (dd, 1H); 4.61 (s, 1H); 4.34 (s, 1H); 4.24-4.13 (m, 2H); 3.77 (d, 3H); 2.87 (d, 3H); 2.35-2.12 (m, 7H)
MS (ESI+): m/z=369 [M+H]+
Prepared from 4-(5-fluoro-1H-indol-1-yl) butanoic acid (see example 106) and 2-(2-furan-2-yl)-N-methylbenzylamine (see below) according to procedure B in 50% yield.
2-(2-furan-2-yl)-N-methylbenzylamine was prepared according to general procedure Y from commercial 2-(2-furyl)benzaldehyde [16191-32-5] in 74% yield.
NMR-1H (CDCl3): δ (ppm) 7.61 (d, 1H); 7.51 (s, 1H); 7.34-6.83 (m, 7H); 6.52-6.37 (m, 3H); 4.71 (d, 2H); 4.23 (dt, 2H); 2.84 (d, 3H); 2.29-2.15 (dd, 4H)
MS (ESI+): m/z=391 [M+H]+
NMR-1H (CDCl3): δ (ppm) 7.93 (d, 1H); 7.82 (d, 1H); 7.65 (dd, 1H); 7.57-7.46 (m, 2H); 7.38 (t, 1H); 7.23-7.08 (m, 3H); 6.94-6.83 (m, 2H); 6.30 (d, 1H); 4.15-4.06 (m, 2H); 3.36 (s, 3H); 2.09-1.78 (m, 4H)
MS (ESI+): m/z=361 [M+H]+
Step 1: 4-(5-fluoro-1H-indol-1-yl)-N-1-naphthylbutanamide
Prepared from 4-(5-fluoro-1H-indol-1-yl) butanoic acid (see example 106) and 1-naphthaleneamine [134-32-7] according to procedure B in 43% yield.
Step 2: to a solution of 100 mg (0.288 mmol) of 4-(5-fluoro-1H-indol-1-yl)-N-1-naphthylbutanamide in 2 mL of anhydrous N,N-dimethylformamide were added 7 mg (0.303 mmol) of sodium hydride (60% dispersion in mineral oil). The mixture was stirred 30 minutes at room temperature and 18 μL (0.288 mmol) of iodomethane were added. The mixture was stirred 12 hours at room temperature then water was added. The resulting mixture was extracted 3 times with ethyl acetate, the combined organic layers were dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (cyclohexane/ethyl acetate 7/3) to give 31 mg (30% yield) of 4-(5-fluoro-1H-indol-1-yl)-N-methyl-N-1-naphthylbutanamide.
NMR-1H (CDCl3): δ (ppm) 7.26 (dd, 2H); 7.06 (d, 2H); 6.92-6.74 (m, 3H); 4.64 (d, 2H); 3.86-3.76 (m, 7H); 2.98-2.81 (m, 9H); 2.56 (t, 1H); 2.47 (t, 1H); 2.28 (d, 3H); 2.13-1.86 (m, 2H)
MS (ESI+): m/z=429 [M+H]+
Prepared from 4-[(4-methoxyphenyl)thio]butanoic acid [52872-94-3] and N-[5-methyl-2-(morpholin-4-yl)benzyl]-N-methylamine (see below) in 50% yield.
Step 1: 5-methyl-2-(morpholin-4-yl)benzonitrile
Potassium carbonate (1.7 g, 12.21 mmol) and morpholine (4.13 mL, 24.41 mmol) was added to a solution of commercial 2-fluoro-5-methylbenzonitrile [64113-84-4] (1.1 g, 8.14 mmol) in 5 mL of N,N-dimethylformamide. The mixture was heated to 180° C. for 1 h 30 under microwave irradiation. After cooling, water was added and the resulting mixture was extracted 3 times with ethyl acetate, the combined organic layers were dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (cyclohexane/ethyl acetate 9/1) to give 817 mg (50% yield) of 5-methyl-2-(morpholin-4-yl)benzonitrile.
Step 2: 5-methyl-2-(morpholin-4-yl)benzaldehyde
Raney nickel (1.38 g, 16.16 mmol) was added to a solution of 5-methyl-2-(morpholin-4-yl)benzonitrile (817 mg, 4.04 mmol) in 50% aqueous formic acid (8 mL, 16.16 mmol). The mixture was refluxed overnight, coiled then filtered through Celite™. Sodium hydroxide 1N was added and the mixture was extracted 3 times with ethyl acetate, the combined organic layers were dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (cyclohexane/ethyl acetate 9/1) to give 130 mg (16% yield) of 5-methyl-2-(morpholin-4-yl)benzaldehyde.
Step 3: N-[5-methyl-2-(morpholin-4-yl)benzyl]-N-methylamine was prepared according to procedure Y in 60% yield.
Prepared from commercial 5-(4-methoxyphenyl)-5-oxopentanoic acid [4-59-6] and 5-chloro-2-methoxy-N-methylbenzylamine [823188-85-8] in 64% yield.
NMR-1H (CDCl3): δ (ppm) 7.96 (dd, 2H); 7.22-7.03 (m, 2H); 6.98-6.86 (m, 2H); 6.76 (dd, 1H); 4.52 (d, 2H); 3.83 (dd, 6H); 3.11-2.92 (m, 5H); 2.55-2.45 (m, 2H); 2.18-2.03 (m, 2H)
MS (ESI+): m/z=390 [M+H]+
To a solution of the acid (1 eq) in dichloromethane (3 mL/mmol) was added thionyl chloride (2 eq). The mixture was refluxed 3 hours then concentrated in vacuo and co-evaporated 3 times with toluene. Dichloromethane (3 mL/mmol) was added to the residue then triethylamine (1 eq) and the amine (1 eq) were added. The mixture was stirred overnight at room temperature and water was added. The mixture was extracted 3 times with dichloromethane, the combined organic layers were dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography (silica gel) with the appropriate gradient determined by TLC to give the amide.
The following compounds were prepared according general procedure C:
Prepared from 4-[(4-fluorophenyl)thio]butanoic acid [18850-56-1] and commercial 2-methoxy-N-methylaniline in 31% yield.
NMR-1H (CDCl3): δ (ppm) 7.39-7.20 (m, 3H); 7.12 (br d, 1H); 7.03-6.89 (m, 4H); 3.80 (s, 3H); 3.16 (s, 3H); 2.82 (t, 2H); 2.18-2.05 (m, 2H); 1.84 (quint, 2H)
MS (ESI+): m/z=334 [M+H]+
Prepared from 4-[(4-fluorophenyl)thio]butanoic acid (see example 83) and 2-methoxy-N-(2,2,2-trifluoroethyl)benzylamine [1016737-83-9] in 15% yield.
NMR-1H (CDCl3): δ (ppm) 7.35-7.21 (m, 4H); 7.00-6.86 (m, 4H); 4.67 (d, 2H); 4.06-3.82 (m, 5H); 2.92 (t, 2H); 2.61-2.49 (m, 2H); 2.03-1.92 (m, 2H)
MS (ESI+): m/z=416 [M+H]+
To a solution of the amine (1 eq) in anhydrous N,N-dimethylformamide (2 mL/mmol) was added sodium hydride (60% dispersion in mineral oil) (1.2 eq). The mixture was stirred for 1 hour at room temperature. In a second flask, oxalyl chloride (1 eq.) was added to a solution of the acid (1 eq.) in dichloromethane (2 mL/mmol) and a drop of anhydrous N,N-dimethylformamide. The mixture was stirred for 1 hour at room temperature. Both mixture were assembled and stirred overnight at room temperature then water was added. The mixture was extracted 3 times with ethyl acetate, the combined organic layers were dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography (silica gel) with the appropriate gradient determined by TLC to give the amide.
The following compounds were prepared according general procedure D:
NMR-1H (CDCl3): δ (ppm) 8.44-8.42 (dd, 1H); 7.94-7.89 (m, 2H); 7.80-7.62 (m, 3H); 7.20-7.14 (m, 2H); 6.90 (t, 2H); 3.38 (s, 3H); 2.78-2.73 (m, 2H); 2.19-1.84 (m, 4H)
MS (ESI+): m/z=355 [M+H]+
Step 1: 4-[(4-fluorophenyl)thio]-N-isoquinolin-1-ylbutanamide was prepared from 4-[(4-fluorophenyl)thio]butanoic acid (see example 83) and commercial 1-aminoisoquinoline in 49% yield.
Step 2: to a solution of 300 mg (0.881 mmol) of 4-[(4-fluorophenyl)thio]-N-isoquinolin-1-ylbutanamide in 2 mL of anhydrous N,N-dimethylformamide were added 22 mg (0.925 mmol) of sodium hydride (60% dispersion in mineral oil). The mixture was stirred 30 minutes at room temperature and 55 μL (0.881 mmol) of iodomethane were added. The mixture was stirred 12 hours at room temperature then water was added. The resulting mixture was extracted 3 times with ethyl acetate, the combined organic layers were dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (cyclohexane/ethyl acetate 7/3) to give 156 mg (50% yield) of 4-[(4-fluorophenyl)thio]-N-isoquinolin-1-yl-N-methylbutanamide.
Prepared by oxidation of example 128 according to procedure used for example 104 in 51% yield.
NMR-1H (CDCl3): δ (ppm) 7.93 (d, 1H); 7.87-6.66 (m, 7H); 7.17 (t, 2H); 3.37 (s, 3H); 2.92-2.67 (m, 2H); 2.19-1.69 (m, 4H)
MS (ESI+): m/z=371 [M+H]+
Step 1: 4-[(4-fluorophenyl)thio]-N-quinolin-8-ylbutanamide was prepared from 4-[(4-fluorophenyl)thio]butanoic acid (see example 83) and commercial 8-aminoquinoline in 13% yield.
Step 2: to a solution of 60 mg (0.176 mmol) of 4-[(4-fluorophenyl)thio]-N-quinolin-8-ylbutanamide in 2 mL of anhydrous N,N-dimethylformamide were added 7 mg (0.176 mmol) of sodium hydride (60% dispersion in mineral oil). The mixture was stirred 30 minutes at room temperature and 11 μL (0.176 mmol) of iodomethane were added. The mixture was stirred 12 hours at room temperature then water was added. The resulting mixture was extracted 3 times with ethyl acetate, the combined organic layers were dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (cyclohexane/ethyl acetate 7/3) to give 29 mg (47% yield) of 4-[(4-fluorophenyl)thio]-N-methyl-N-quinolin-8-ylbutanamide.
NMR-1H (CDCl3): δ (ppm) 8.93 (dd, 1H); 8.22 (dd, 1H); 7.88-7.82 (m, 1H); 7.60-7.55 (dd, 2H); 7.50-7.42 (m, 1H); 7.22-7.16 (m, 2H); 6.93 (t, 2H); 3.38 (s, 3H); 2.79-2.72 (m, 2H); 2.19-1.79 (m, 4H)
MS (ESI+): m/z=355 [M+H]+
Step 1: 4-[(4-fluorophenyl)thio]-N-isoquinolin-5-ylbutanamide was prepared from 4-[(4-fluorophenyl)thio]butanoic acid (see example 83) and commercial 5-aminoisoquinoline
[1125-60-6] in 27% yield.
Step 2: to a solution of 126 mg (0.37 mmol) of 4-[(4-fluorophenyl)thio]-N-isoquinolin-5-ylbutanamide in 2 mL of anhydrous N,N-dimethylformamide were added 30 mg (0.74 mmol) of sodium hydride (60% dispersion in mineral oil). The mixture was stirred 30 minutes at room temperature and 28 μL (0.44 mmol) of iodomethane were added. The mixture was stirred 12 hours at room temperature then water was added. The resulting mixture was extracted 3 times with dichloromethane, the combined organic layers were dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (dichloromethane/ethanol 95/5) to give 39 mg (30% yield) of 4-[(4-fluorophenyl)thio]-N-isoquinolin-5-yl-N-methylbutanamide.
NMR-1H (CDCl3): δ (ppm) 9.36 (d, 1H); 8.60 (dd, 1H); 8.03 (dd, 1H); 7.65 (t, 1H); 7.55 (dd, 2H); 7.15 (dt, 2H); 6.89 (t, 2H); 3.33 (s, 3H); 2.76 (dt, 2H); 2.19-2.05 (m, 2H); 1.88-175 (m, 2H)
MS (ESI+): m/z=355 [M+H]+
NMR-1H (CDCl3): δ (ppm) 8.44 (d, 1H); 7.92 (dt, 2H); 7.80-7.62 (m, 3H); 7.17 (d, 2H); 6.75 (d, 2H); 3.77 (s, 3H); 3.38 (s, 3H); 2.76-2.65 (m, 2H); 2.19-1.84 (m, 4H)
MS (ESI+): m/z=367 [M+H]+
Step 1: 4-[(4-fluorophenyl)thio]-N-isoquinolin-1-ylbutanamide was prepared from 4-[(4-methoxyphenyl)thio]butanoic acid [52872-94-3] and commercial 1-aminoisoquinoline in 49% yield.
Step 2: to a solution of 300 mg (0.881 mmol) of 4-[(4-fluorophenyl)thio]-N-isoquinolin-1-ylbutanamide in 2 mL of anhydrous N,N-dimethylformamide were added 22 mg (0.925 mmol) of sodium hydride (60% dispersion in mineral oil). The mixture was stirred 30 minutes at room temperature and 55 μL (0.881 mmol) of iodomethane were added. The mixture was stirred 12 hours at room temperature then water was added. The resulting mixture was extracted 3 times with ethyl acetate, the combined organic layers were dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (cyclohexane/ethyl acetate 7/3) to give 156 mg (50% yield) of N-isoquinolin-1-yl-4-[(4-methoxyphenyl)thio]-N-methylbutanamide.
Prepared by oxidation of example 132 according to procedure used for example 104 in 70% yield.
NMR-1H (CDCl3): δ (ppm) 8.43 (d, 1H); 7.95-6.65 (m, 5H); 7.49 (d, 2H); 6.98 (d, 2H); 3.84 (s, 3H); 3.37 (s, 3H); 2.86-2.65 (m, 2H); 2.03-1.76 (m, 4H)
MS (ESI+): m/z=383 [M+H]+
Prepared from 4-[(4-methoxyphenyl)thio]butanoic acid [52872-94-3] and commercial 6-methoxyindole [3189-13-7] in 6% yield.
NMR-1H (CDCl3): δ (ppm) 8.01 (d, 1H); 7.38-7.20 (m, 4H); 6.85 (dd, 1H); 6.77 (d, 2H); 6.50 (dd, 1H); 3.82 (s, 3H); 3.72 (s, 3H); 3.04-2.90 (m, 4H); 2.11-2.00 (m, 2H)
MS (ESI+): m/z=356 [M+H]+
Prepared from 4-{[2-(ethoxycarbonyl)-4-fluorophenyl]thio}butanoic acid (see below) and commercial 6-methoxyindole [3189-13-7] in 14% yield.
NMR-1H (CDCl3): δ (ppm) 8.08 (d, 1H); 7.65 (dd, 1H); 7.44-7.31 (m, 3H); 7.18 (dt, 1H); 6.91 (dd, 1H); 6.56 (dd, 1H); 4.38 (d, 2H); 3.89 (s, 3H); 3.17-3.06 (m, 4H), 2.32-2.07 (m, 2H); 1.40 (t, 3H)
MS (ESI+): m/z=416 [M+H]+
Step 1: 5 mg of 4-dimethylaminopyridine were added to 25 mL of tert-butyl alcohol and 25 mL of pyridine. The mixture was cooled to 0° C. and commercial chlorobutanoyl chloride [4635-59-0] (8.3 mL, 73.5 mmol) was added dropwise. The mixture was allowed to warm up to room temperature and stirred to 3 hours. Saturated NaHCO3 solution was added to the reaction mixture. The resulting mixture was extracted 3 times with ethyl acetate. The combined organic phases were washed with brine, separated then dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (dichloromethane) to give 12.5 g (yield 95%) of tert-butyl 4-chlorobutanoate.
Step 2: Sodium iodide (40 g, 265.88 mmol) was added to a solution of tert-butyl 4-chlorobutanoate (12.5 g, 69.96 mmol) in 125 mL of tetrahydrofurane. The mixture was refluxed for 24 hours, then, after cooling water was added. The resulting mixture was extracted 3 times with ethyl acetate. The combined organic phases were washed with brine, separated then dried with anhydrous MgSO4, filtered and concentrated in vacuo to give 14.5 g of tert-butyl 4-iodobutanoate (77% yield).
Step 3: 60 mg (1.5 mmol) of sodium hydride (60% dispersion in mineral oil) was added to a solution of commercial ethyl 5-fluoro-2-sulfanylbenzoate [870703-85-8] (300 mg, 1.5 mmol) in 5 mL of anhydrous N,N-dimethylformamide. The mixture was stirred for 30 min at room temperature then a solution of tert-butyl 4-iodobutanoate (485.6 mg, 1.5 mmol) in 2 mL of anhydrous N,N-dimethylformamide was added. The mixture was heated to a 100° C. overnight, then, after cooling, water was added. The resulting mixture was extracted 3 times with ethyl acetate. The combined organic phases were washed with brine, separated then dried with anhydrous MgSO4, filtered and concentrated in vacuo to give 644 mg (92% yield) of ethyl 2-[(4-tert-butoxy-4-oxobutyl)thio]-5-fluorobenzoate.
Step 4: 600 μL of trifluoroacetic acid were added to a solution of 644 mg (1.5 mmol) of ethyl 2-[(4-tert-butoxy-4-oxobutyl)thio]-5-fluorobenzoate in 6 mL of dichloromethane. The mixture was stirred for 5 hours at room temperature then washed twice with water, dried with anhydrous MgSO4, filtered and concentrated in vacuo to give 429 mg of 4-{[2-(ethoxycarbonyl)-4-fluorophenyl]thio}butanoic acid (100% yield).
In a three-neck round-bottom flask equipped with a Dean-Stard trap, commercial 2-methoxy-N-methylbenzylamine (4.88 g, 32.4 mmol) and camphorsulfonic acid (1.5 g, 6.46 mmol) were added to a solution of thiobutyrolactone (3.3 g, 32.4 mmol) in 50 mL of toluene. The mixture was refluxed 24 hours then concentrated in vacuo. The residue was purified by flash chromatography on silica gel (cyclohexane/ethyl acetate 9/1 to 7/3) to give 6.4 g (78% yield) of 4-mercapto-N-(2-methoxybenzyl)-N-methylbutanamide.
Potassium tert-butoxide (1.5 eq) and the chloro derivative (1 eq) were added to a solution of 4-mercapto-N-(2-methoxybenzyl)-N-methylbutanamide (1, 5 eq) in dry DMSO. The mixture was heated 2.5 hours at 110° C., then aqueous NaOH 1N was added. The mixture was extracted 3 times with ethyl acetate, the combined organic layers were washed with brine, dried on anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography (silica gel) with the appropriate gradient determined by TLC to give the required compound.
The following compounds were prepared according general procedure E:
Prepared from commercial 2-chloroquinoxaline in 56% yield.
NMR-1H (CDCl3): δ (ppm) 8.56 (d, 1H); 8.08-7.77 (m, 2H); 7.75-7.51 (m, 2H); 7.33-7.12 (m, 1H); 6.99 (dd, 1H); 6.88 (q, 2H); 4.55 (d, 2H); 3.81 (d, 3H); 3.48-3.37 (m, 2H); 2.94 (s, 3H); 2.58 (t, 2H); 2.31-2.04 (m, 2H)
MS (ESI+): m/z=382 [M+H]+
Prepared from commercial 2,5-dichloropyridine in 49% yield.
NMR-1H (CDCl3): δ (ppm) 8.31 (ddd, 1H); 7.44-7.38 (m, 1H); 7.31-7.05 (m, 2H); 7.04-6.79 (m, 3H); 4.53 (d, 2H); 3.81 (d, 3H); 3.19 (dt, 2H); 2.92 (s, 3H); 2.51 (t, 2H); 2.15-1.91 (m, 2H).
MS (ESI+): m/z=365 [M+H]+
Step 1: synthesis of substituted N-benzyl-4-chloro-N-methylbutanamide:
Triethylamine (1 eq) and 4-chlorobutyryl chloride (1 eq) were added to a solution of the substituted N-methylbenzylamine (1 eq) in dichloromethane (1.3 mL/mmol). The mixture was stirred 3 hours at room temperature then water was added. The resulting mixture was extracted 3 times with dichloromethane, the combined organic layers were dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography (silica gel) with the appropriate gradient determined by TLC to give the substituted N-benzyl-4-chloro-N-methylbutanamide.
Step 2: alkylation of thiols with substituted N-benzyl-4-chloro-N-methylbutanamide:
Anhydrous potassium carbonate (1.5 eq) and substituted N-benzyl-4-chloro-N-methylbutanamide (1 eq) were added to a solution of the thiol derivative (1 eq) in acetonitrile (6 mL/mmol). The mixture was refluxed overnight then water and ethyl acetate was added after cooling. The mixture was extracted 3 times with ethyl acetate, the combined organic layers were washed with brine, dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography (silica gel) with the appropriate gradient determined by TLC to give the thio-ether.
The following compounds were prepared according general procedure F:
Prepared from commercial 3,4-difluorothiophenol and commercial 2-methoxy-N-methylbenzylamine in 27% yield.
NMR-1H (CDCl3): δ (ppm) 7.32-6.85 (m, 7H); 4.55 (d, 2H); 3.84-3.82 (m, 3H); 3.03-2.92 (m, 5H); 2.50 (t, 2H); 2.04-1.94 (m, 2H) MS (ESI+): m/z=366 [M+H]+
Prepared from commercial 3-fluorothiophenol and commercial 2-methoxy-N-methylbenzylamine in 37% yield.
NMR-1H (CDCl3): δ (ppm) 7.32-6.80 (m, 8H); 4.55 (d, 2H); 3.84-3.82 (m, 3H); 3.08-2.94 (m, 5H); 2.53 (t, 2H); 2.08-1.98 (m, 2H)
MS (ESI+): m/z=348 [M+H]+
Prepared from commercial 2,4-difluorothiophenol and commercial 2-methoxy-N-methylbenzylamine in 15% yield.
NMR-1H (CDCl3): δ (ppm) 7.44-7.13 (m, 2H); 7.02-6.77 (m, 5H); 4.55 (d, 2H); 3.85-3.82 (m, 3H); 2.99-2.88 (m, 5H); 2.51 (t, 2H); 1.97-1.89 (m, 2H)
MS (ESI+): m/z=366 [M+H]+
Prepared from commercial 3-chloro-4-fluorothiophenol and commercial 2-methoxy-N-methylbenzylamine in 4% yield.
NMR-1H (CDCl3): δ (ppm) 7.43-7.09 (m, 4H); 7.07-6.76 (m, 3H); 4.52 (d, 2H); 3.81 (d, 3H); 3.04-2.86 (m, 5H); 2.48 (t, 2H); 2.06-1.86 (m, 2H)
MS (ESI+): m/z=382/384 [M+H]+
Prepared from commercial 2-chloro-4-fluorothiophenol and commercial 2-methoxy-N-methylbenzylamine in 5% yield.
NMR-1H (CDCl3): δ (ppm) 7.41-6.85 (m, 7H); 4.56 (d, 2H); 3.84-3.82 (m, 3H); 3.05-2.94 (m, 5H); 2.54 (t, 2H); 2.08-1.93 (m, 2H)
MS (ESI+): m/z=382 [M+H]+
Prepared from methyl 4-mercaptobenzoate [6302-65-4] and N-methyl-2-(trifluoromethyl)benzylamine [296276-41-0] in 46% yield.
NMR-1H (CDCl3): δ (ppm) 7.98-7.85 (m, 2H); 7.75-7.16 (m, 6H); 4.76 (d, 2H); 3.90 (d, 3H); 3.15 (t, 1H); 3.05 (t, 1H); 3.00 (s, 1H); 2.92 (s, 2H); 61 (t, 1H); 2.44 (t, 1H); 2.20-1.96 (m, 2H)
MS (ESI+): m/z=426 [M+H]+
Prepared from commercial 1,2,3,4-tetrahydroquinoline and 2-isopropoxy-N-methylbenzylamine (see below) in 63% yield.
NMR-1H (CDCl3): δ (ppm) 7.38-7.08 (m, 1H); 7.10-6.77 (m, 5H); 6.66-6.46 (m, 2H); 4.53 (d, 2H); 3.39-3.17 (m, 4H); 2.94-2.92 (m, 2H); 2.77-2.64 (m, 2H); 2.40 (t, 2H); 2.07-1.77 (m, 4H)
MS (ESI+): m/z=381 [M+H]+
2-Isopropoxy-N-methylbenzylamine was prepared according general procedure Y from commercial 2-isopropoxybenzaldehyde.
Prepared from commercial 4-bromothiophenol and 5-fluoro-2-methoxy-N-methylbenzylamine [823188-87-0] in 51% yield.
NMR-1H (CDCl3): δ (ppm) 7.40-7.36 (m, 2H); 7.28-7.15 (m, 2H); 7.02-6.72 (m, 3H); 4.52 (d, 2H); 3.82-3.80 (m, 3H); 3.06-2.95 (m, 5H); 2.56-2.45 (m, 2H); 2.09-1.93 (m, 2H)
MS (ESI+): m/z=426/428 [M+H]+
Prepared from methyl 4-mercaptobenzoate [6302-65-4] and commercial 2-methoxy-N-methylbenzylamine in 15% yield.
NMR-1H (CDCl3): δ (ppm) 7.94-7.88 (m, 2H); 7.35-7.13 (m, 3H); 7.05-6.85 (m, 3H); 4.55 (d, 2H); 3.9 (s, 3H); 3.83 (d, 3H); 3.09 (dt, 2H); 2.94 (d, 3H); 2.53 (t, 2H); 2.19-1.90 (m, 2H)
MS (ESI+): m/z=388 [M+H]+
Prepared from methyl 4-mercaptobenzoate [6302-65-4] and 5-fluoro-2-methoxy-N-methylbenzylamine [823188-87-0] in 46% yield according to general procedure E
NMR-1H (CDCl3): δ (ppm) 7.94-7.88 (m, 2H); 7.35-7.30 (d, 2H); 7.01-6.72 (m, 3H); 4.58-4.45 (d, 2H); 3.89 (s, 3H); 3.81 (d, 3H); 3.17-3.02 (m, 2H); 2.95 (s, 3H); 2.60-2.44 (m, 2H); 2.14-1.95 (m, 2H).
MS (ESI+): m/z=406 [M+H]+
Prepared by reduction of example 138 according to the following procedure:
Sodium borohydride (21 mg, 0.185 mmol) were added to a solution of methyl 4-({4-[(5-fluoro-2-methoxybenzyl)methylamino]-4-oxobutyl}thio)benzoate in 2 ml of ethanol. The mixture was stirred at room temperature overnight then refluxed for 5 h. After cooling, water was added and the resulting mixture was extracted 3 times with ethyl acetate, the combined organic layers were washed with brine, dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (cyclohexane/ethyl acetate 5/5) to give 24 mg (yield 34%) of the corresponding alcohol. NMR-1H (CDCl3): δ (ppm) 7.31-7.16 (m, 4H); 6.92-6.61 (m, 3H); 4.58 (dd, 2H); 4.50-4.38 (d, 2H); 3.74 (dd, 3H); 3.03-2.85 (m, 5H); 2.49-2.36 (m, 2H); 1.99-1.86 (m, 2H). MS (ESI+): m/z=378 [M+H]+
Alkylation of anilines with 4-chloro-N-(2-methoxybenzyl)-N-methylbutanamide:
Potassium iodide (20 mg/mmol), 4-chloro-N-(2-methoxybenzyl)-N-methylbutanamide and acetonitrile (4 mL/mmol) were charged in a sealed vial and heated 15 to 30 minutes at 120-140° C. in a microwave apparatus. After cooling, the mixture was concentrated in vacuo and purified by semi-preparative HPLC (acetonitrile/H2O) to give the alkylaniline.
The following compounds were prepared according general procedure G:
Prepared from N-cyclopropyl-4-fluoroaniline [136005-64-6] in 16% yield.
NMR-1H (CDCl3): δ (ppm) 7.39-7.08 (m, 1H); 7.08-6.77 (m, 7H); 4.53 (d, 2H); 3.83 (d, 3H); 3.49-3.29 (m, 2H); 2.95 (d, 2H); 2.88 (s, 1H); 2.49-2.17 (m, 3H); 2.02-1.79 (m, 2H); 0.84-0.72 (m, 2H); 0.61-0.48 (m, 2H)
MS (ESI+): m/z=371 [M+H]+
Prepared from N-ethyl-4-fluoroaniline [405-67-4] in 17% yield.
NMR-1H (CDCl3): δ (ppm) 7.34-7.13 (m, 2H); 7.05-6.83 (m, 4H); 6.71-6.56 (m, 2H); 4.56 (d, 2H); 3.83 (s, 3H); 3.39-3.17 (m, 4H); 2.94 (d, 3H); 2.45-2.32 (m, 2H); 2.03-1.82 (m, 2H); 1.18-1.02 (q, 3H)
MS (ESI+): m/z=359 [M+H]+
Prepared from 4-fluoroaniline in 36% yield.
NMR-1H (CDCl3): δ (ppm) 7.31-6.80 (m, 6H); 6.54-6.46 (m, 2H); 4.56 (d, 2H); 3.82 (s, 3H); 3.18-3.06 (m, 3H); 2.96-2.94 (m, 3H); 2.52-2.44 (m, 2H); 2.04-1.94 (m, 2H)
MS (ESI+): m/z=331 [M+H]+
Prepared from 4-fluoro-N-(2-hydroxyethyl)aniline [702-17-0] in 7% yield.
NMR-1H (CDCl3): δ (ppm) 7.35-7.08 (m, 2H); 7.03-6.81 (m, 6H); 4.53 (d, 2H); 3.82 (d, 3H); 3.73 (t, 2H); 3.50-3.27 (m, 4H); 2.99-2.87 (m, 3H); 2.39 (t, 2H); 2.02-1.80 (m, 2H) MS (ESI+): m/z=375 [M+H]+
Prepared by saponification of compound of example 107.
NMR-1H (CDCl3): δ (ppm) 7.96 (d, 2H); 7.44-7.13 (m, 3H); 7.09-6.79 (m, 3H); 4.57 (d, 2H); 3.82 (d, 3H); 3.10 (dt, 2H); 2.96 (d, 3H); 2.58 (t, 2H); 2.14-1.98 (m, 2H);
MS (ESI+): m/z=374 [M+H]+
Prepared from compound of example 112 as follows:
To a solution of compound of example 112 (90 mg, 0.241 mmol) and methylamine 2M in THF (120 μL, 0.241 mmol) in N,N-dimethylformamide were added 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (46.2 mg, 0.241 mmol) and N,N-dimethylaminopyridine (29.4 mg, 0.241 mmol). The solution was stirred overnight at room temperature and a saturated solution of NaHCO3 was added. The mixture was extracted 3 times with ethyl acetate, the organic layers were combined and washed with HCl 1N, dried over anhydrous MgSO4 and concentrated under vacuum. The residue was purified by flash chromatography on silica gel (cyclohexane/ethyl acetate 5/5 to 3/7) to give 17.5 mg (yield 19%) of 4-({4-[(2-methoxybenzyl)(methyl)amino]-4-oxobutyl}thio)-N-methylbenzamide.
NMR-1H (CDCl3): δ (ppm) 7.64 (t, 2H); 7.30 (q, 2H); 7.23-7.14 (m, 1H); 7.02-6.85 (m, 3H); 6.13 (s, 1H); 4.55 (d, 2H); 3.83 (d, 3H); 3.19-3.03 (m, 2H); 3.02 (d, 3H); 2.94 (s, 3H); 2.53 (t, 2H); 2.12-1.96 (m, 2H)
MS (ESI+): m/z=387 [M+H]+
Prepared by oxidation of compound of example 3 as follows:
To a solution of compound of example 3 (200 mg, 0.572 mmol) in 3 mL of dichloromethane was added m-chloroperbenzoic acid (197.3 mg, 1.143 mmol). The mixture was stirred overnight at room temperature, then the precipitate was filtered. The filtrate was washed with a saturated NaHCO3 solution, dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (cyclohexane/ethyl acetate 5/5 to 0/10) to give 80 mg (yield 38%) of N-(2-chlorobenzyl)-4-[(4-hydroxyphenyl)sulfinyl]-N-methylbutanamide.
NMR-1H (CDCl3): δ (ppm) 7.48-6.96 (m, 6H); 6.89 (dd, 2H); 4.63 (d, 2H); 3.04-2.80 (m, 5H); 2.52 (dt, 2H); 2.15-1.85 (m, 2H)
MS (ESI+): m/z=366 [M+H]+
To a solution of N-benzyl-4-(4-benzyloxyphenoxy)-N-methylbutanamide (see below, 200 mg, 0.513 mmol) in 3 mL of anhydrous dichloromethane under argon was added BCl3 1M in dichloromethane (1 mL, 1 mmol), then the mixture was stirred 2 hours at room temperature. The mixture was quenched with a saturated NaHCO3 solution, extracted 2 times with dichloromethane. The combined organic layers were washed with brine, dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (cyclohexane/ethyl acetate 7/3 to 5/5) to give 119 mg (yield 76%) of N-benzyl-4-(4-hydroxyphenoxy)-N-methylbutanamide.
NMR-1H (CDCl3): δ (ppm) ppm 7.52-7.02 (m, 5H); 6.96-6.49 (m, 4H); 4.62 (d, 2H); 3.95 (dd, 2H); 2.96 (d, 3H); 2.61 (t, 2H); 2.24-2.05 (m, 2H)
MS (ESI+): m/z=300 [M+H]+
N-Benzyl-4-(4-benzyloxyphenoxy)-N-methylbutanamide was prepared according general procedure A from 4-[4-(benzyloxyphenoxy)]butanoic acid [202126-58-7] and commercial N-methylbenzylamine in 88% yield.
Step 1: 4-[(4-hydroxyphenyl)thio]-N-methyl-N-(2-nitrobenzyl)butanamide
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and N-methyl-2-nitrobenzylamine [56222-08-3] in 62% yield.
Step 2: N-(2-aminobenzyl)-4-[(4-hydroxyphenyl)thio]-N-methylbutanamide
To a solution of 4-[(4-hydroxyphenyl)thio]-N-methyl-N-(2-nitrobenzyl)butanamide (200 mg, 0.555 mmol) in a mixture of acetic acid (2 mL), water (8 mL) and ethyl acetate (6 mL) were added iron powder (155 mg, 2.775 mmol). The mixture was stirred 10 minutes at 65° C., then filtered on Celite®. The filtrate was extracted 3 times with ethyl acetate, the combined organic layers were washed with brine, dried with anhydrous MgSO4, filtered and concentrated in vacuo to give 148 mg of the amine which was used without purification.
Step 3: N-[2-(acetylamino)benzyl]-4-[(4-hydroxyphenyl)thio]-N-methylbutanamide acetate
To a solution of N-(2-aminobenzyl)-4-[(4-hydroxyphenyl)thio]-N-methylbutanamide (148 mg, 0.448 mmol) in 3 mL of dichloromethane were added acetic anhydride (101 mg, 0.985 mmol) and pyridine (158 μL, 1.792 mmol). The mixture was refluxed 4 hours, cooled to room temperature, washed with brine, dried with anhydrous MgSO4 and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (cyclohexane/ethyl acetate 5/5) to give 123 mg (yield 66%) of the acetamide.
Step 4: N-[2-(acetylamino)benzyl]-4-[(4-hydroxyphenyl)thio]-N-methylbutanamide
The compound was prepared by saponification (NaOH, methanol) of N-[2-(acetylamino)benzyl]-4-[(4-hydroxyphenyl)thio]-N-methylbutanamide acetate and purified by semi-preparative HPLC.
NMR-1H (CDCl3): δ (ppm) 9.80 (br s, 1H); 8.40 (d, 1H); 7.41-7.15 (m, 4H); 7.04 (dt, 1H); 6.76 (d, 2H); 6.03 (br s, 1H); 4.50 (s, 2H); 2.94 (s, 3H); 2.87 (t, 2H); 2.49 (t, 2H); 2.16 (s, 3H); 2.00-1.81 (m, 2H)
MS (ESI+): m/z=373 [M+H]+
Step 1: methyl [2-({[4-(4-(fluorophenyl)thio)-butyryl]-methylamino}-methyl)-phenoxy]acetate
To a solution of compound of example 43 (300 mg, 0.9 mmol) in 5 mL of acetonitrile were added anhydrous potassium carbonate (187 mg, 1.35 mmol) and methyl bromoacetate (151 mg, 0.99 mmol). The mixture was refluxed overnight then water was added. The resulting mixture was extracted 3 times with ethyl acetate, the combined organic layers were washed with brine, dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (cyclohexane/ethyl acetate 8/2) to give 300 mg (yield 82%) of the ester.
Step 2: [2-({[4-(4-(fluorophenyl)thio)-butyryl]-methylamino}-methyl)-phenoxy]acetic acid
The compound was prepared by saponification (NaOH, methanol) of the ester (step 1) and used without purification.
Step 3: 4-[(4-fluorophenyl)thio]-N-[2-(2-methylamino-2-oxoethoxy)benzyl]-N-methylbutanamide
The compound was prepared according the procedure described for example 113 in 18% yield.
NMR-1H (CDCl3): δ (ppm) 8.26 (s, large 1H); 7.38-7.27 (m, 3H); 7.22 (dd, 1H); 7.04-6.91 (m, 3H); 6.81 (d, 1H); 4.69 (s, 2H); 4.41 (s, 2H); 3.00-2.84 (m, 5H); 2.81 (s, 3H); 2.47 (t, 2H); 1.95 (p, 2H)
MS (ESI+): m/z=405 [M+H]+
Step 1: to a solution of compound of example 43 (200 mg, 0.6 mmol) in 3 mL of acetonitrile were added anhydrous potassium carbonate (124 mg, 0.9 mmol) and commercial 2-(boc-amino)ethyl bromide (148 mg, 0.66 mmol). The mixture was refluxed overnight then water and ethyl acetate were added. The resulting mixture was extracted 3 times with ethyl acetate, the combined organic layers were washed with brine, dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (cyclohexane/ethyl acetate 9/1 to 8/2) to give 100 mg (yield 35%) of the boc derivative.
Step 2: to a solution of the boc derivative (100 mg, 0.21 mmol) in 3 mL of dichloromethane was added 162 μL of trifluoroacetic acid. The mixture was stirred 3 hours at room temperature, then concentrated in vacuo. Ethyl acetate was added to the residue, and the solution was washed with a saturated solution of NaHCO3, dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on reversed-phase silica gel (acetonitrile/water) to give 67 mg (84% yield) of N-[2-(2-aminoethoxy)benzyl]-4-[(4-fluorophenyl)thio]-N-methylbutanamide.
NMR-1H (CDCl3): δ (ppm) 7.50-6.70 (m, 8H); 4.57 (d, 2H); 4.17-3.84 (m, 2H); 3.16-3.00 (m, 2H); 3.03-2.84 (m, 5H); 2.49 (dt, 2H); 1.96 (quint, 2H)
MS (ESI+): m/z=377 [M+H]+
To a solution of compound of example 43 (90 mg, 0.27 mmol) in 2 mL of anhydrous DMF were added sodium hydride (60% in mineral oil, 22 mg, 0.54 mmol). The mixture was stirred 30 minutes at room temperature and 2-dimethylaminoethyl chloride hydrochloride (38.9 mg, 0.27 mmol) was added. The mixture was stirred at 80° C. overnight then water was added. The resulting mixture was extracted 3 times with ethyl acetate, the combined organic layers were washed with brine, dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on reversed-phase silica gel (acetonitrile/water) to give 51 mg (yield 47%) of N-{2-[2-(dimethylamino)ethoxy]benzyl}-4-[(4-fluorophenyl)thio]-N-methylbutanamide.
NMR-1H (CDCl3): δ (ppm) 7.47-7.06 (m, 4H); 7.06-6.80 (m, 4H); 4.56 (d, 2H); 4.11 (dt, 2H); 3.08-2.68 (m, 7H); 2.56-2.44 (m, 2H); 2.37 (d, 2H); 2.07-1.85 (m, 2H)
MS (ESI+): m/z=405 [M+H]+
Prepared by saponification (NaOH, methanol) of compound of example 46.
NMR-1H (DMSO-D6): δ (ppm) 13.06 (br s, 1H); 9.53 (br s, 1H); 8.09-7.74 (m, 1H); 7.72-6.96 (m, 5H); 6.70 (dd, 2H); 4.85 (d, 2H); 3.00-2.66 (m, 5H); 2.32 (t, 1H); 1.84-1.58 (m, 2H)
MS (ESI+): m/z=360 [M+H]+
Step 1: tert-butyl 4-[2-({4-[(4-hydroxyphenyl)thio]butanoyl}methylamino)-methylphenyl]piperazine-1-carboxylate
Prepared from 4-[(4-hydroxyphenyl)thio]butanoic acid [85896-82-8] and tert-butyl 4-[2-(methylamino)methylphenyl]piperazine-1-carboxylate (see below) according general procedure B in 67% yield.
Tert-Butyl 4-[2-(methylamino)methylphenyl]piperazine-1-carboxylate was prepared according general procedure Y from commercial tert-butyl 4-(2-formylphenyl)piperazine-1-carboxylate [174855-57-3].
Step 2: to a solution of the Boc derivative (158 mg, 0.316 mmol) in 3 mL of dichloromethane was added 244 μL of trifluoroacetic acid. The mixture was stirred 3 hours at room temperature, then water was added. The mixture was extracted with dichloromethane, the combined organic layers were washed with a saturated solution of NaHCO3, dried with anhydrous MgSO4, filtered and concentrated in vacuo to give 61 mg (48% yield) of 4-[(4-hydroxyphenyl)thio]-N-methyl-N-(2-piperazin-1-ylbenzyl)butanamide. NMR-1H (CDCl3): δ (ppm) 7.29-7.05 (m, 6H); 6.78-6.71 (m, 2H); 4.62 (d, 2H); 3.05-2.78 (m, 13H); 2.58-2.53 (t, 1H); 2.47-2.42 (t, 1H); 2.01-1.86 (m, 2H)
MS (ESI+): m/z=400 [M+H]+
To a solution of compound of example 121 (60 mg, 0.15 mmol) in 3 mL of dichloromethane were added 49 μL of pyridine and acetic anhydride (31.2 μL, 0.33 mmol). The mixture was refluxed 4 hours then water was added. The mixture was extracted with dichloromethane, the combined organic layers were washed with brine, dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (cyclohexane/ethyl acetate 5/5 to 0/10) to give 56 mg (77% yield) of N-[2-(4-acetylpiperazin-1-yl)benzyl]-4-({4-[benzyl(methyl)amino]-4-oxobutyl}thio) phenyl acetate.
NMR-1H (CDCl3): δ (ppm) 7.38-6.95 (m, 8H); 4.66 (d, 2H); 3.82-3.67 (m, 2H); 3.64-3.53 (m, 2H); 3.09-2.78 (m, 9H); 2.51 (dt, 2H); 2.28 (s, 3H); 2.14 (d, 3H); 2.13-1.90 (m, 2H) MS (ESI+): m/z=484 [M+H]+
To a solution of compound of example 35 (300 mg, 0.868 mmol) in 5 mL of toluene was added Lawesson's Reagent (351 mg, 0.868 mmol). The mixture was refluxed 2 hours then concentrated in vacuo. The residue were co-evaporated 3 times with dichloromethane then purified by flash chromatography on reversed-phase silica gel (acetonitrile/water) to give 24 mg (8% yield) of 4-[(4-hydroxyphenyl)thio]-N-(2-methoxybenzyl)-N-methylbutanethioamide.
NMR-1H (CDCl3): δ (ppm) 7.33-7.14 (m, 4H); 6.97-6.85 (m, 2H); 6.79-6.68 (m, 2H); 5.04 (d, 2H); 3.82 (d, 3H); 3.27 (d, 3H); 2.98-2.82 (m, 4H); 2.14-1.99 (m, 2H)
MS (ESI+): m/z=362 [M+H]+
Prepared by saponification (NaOH, methanol) of compound of example 122 in 34% yield. NMR-1H (CDCl3): δ (ppm) 7.34-7.05 (m, 6H); 6.80-6.73 (m, 2H); 4.66 (d, 2H); 3.74-3.55 (m, 4H); 2.95-2.79 (m, 9H); 2.51 (dt, 2H); 2.16-2.13 (m, 3H); 2.03-1.89 (m, 2H)
MS (ESI+): m/z=442 [M+H]+
Prepared by saponification (NaOH, methanol) of compound of example 104 in 99% yield. NMR-1H (CDCl3): δ (ppm) 8.03-7.89 (m, 2H); 7.73-7.15 (m, 6H); 4.76 (d, 2H); 3.14 (t, 1H); 3.04 (t, 1H); 2.96 (d, 3H); 2.62 (t, 1H); 2.45 (t, 1H); 2.20-1.96 (m, 2H)
MS (ESI+): m/z=442 [M+H]+
To a solution of compound of example 25 (79 mg, 0.227 mmol) in 2.4 mL of acetic acid were added 65 μL of hydrogen peroxide (35 wt. % solution in water). The mixture was stirred 2 hours at room temperature then refluxed 1 hour. Water was added and the mixture was extracted with dichloromethane. The combined organic layers were washed with H2O then brine, dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (dichloromethane/ethanol 100/0 to 95/5) to give 49 mg (57% yield) of 4-[(4-fluorophenyl)sulfonyl]-N-(2-methoxybenzyl)-N-methylbutanamide.
NMR-1H (CDCl3): δ (ppm) 8.03-7.77 (m, 2H); 7.34-7.05 (m, 3H); 7.03-6.76 (m, 3H); 4.50 (d, 2H); 3.83 (d, 3H); 3.30-3.15 (m, 2H); 2.92 (d, 3H); 2.60-2.44 (m, 2H); 2.16-1.92 (m, 2H),
MS (ESI+): m/z=380 [M+H]+
Step 1: N-(2-bromobenzyl)-4-[(4-hydroxyphenyl)thio]-N-methylbutanamide
Prepared from 4-[(4-fluorophenyl)thio]butanoic acid [18850-56-1] and commercial 2-bromo-N-methylbenzylamine in 64% yield.
Step 2: N-(2-bromobenzyl)-4-[(4-hydroxyphenyl)thio]-N-methylbutanamide (200 mg, 0.507 mmol), commercial 3,6-dihydro-2H-pyridine-1-tert-butoxycarbonyl-4-boronic acid pinacol ester (156.8 mg, 0.507 mmol), Pd(PPh3)4 (29.3 mg, 0.025 mmol), LiCl (64.5 mg, 1.521 mmol), 1.2 mL of an aqueous solution 1M of Na2CO3, 1 mL of toluene, 1 mL of THF and 0.5 mL of ethanol were charged in a sealed vial and heated 15 minutes at 120° C. on a microwave apparatus (Biotage), then 10 mg of Pd(PPh3)4 were added and the mixture was heated 30 minutes at 150° C. Water was added and the mixture was extracted 3 times with ethyl acetate. The combined organic layers were washed with brine, dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (cyclohexane/ethyl acetate) to give 255 mg (100% yield) of 4-[(4-hydroxyphenyl)thio]-N-methyl-N-[2-(N′-boc-1,2,3,6-tetrahydropyridin-4-yl)benzyl]butanamide.
Step 3: to a solution of the Boc derivative (255 mg, 0.507 mmol) in 3 mL of dichloromethane was added 391 μL of trifluoroacetic acid. The mixture was stirred 3 hours at room temperature, then basified with 1N NaOH. The mixture was extracted 3 times with dichloromethane, the combined organic layers were washed with brine, dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (dichloromethane/ethanol 99/1 to 90/10) to give 42 mg (21% yield) of 4-[(4-hydroxyphenyl)thio]-N-methyl-N-[2-(1,2,3,6-tetrahydropyridin-4-yl)benzyl]butanamide.
NMR-1H (DMSO-D6): δ (ppm) 7.73-7.18 (m, 6H); 6.94 (t, 2H); 5.87-5.70 (m, 1H); 4.80-4.65 (m, 2H); 3.70-3.28 (m, 3H); 3.22 (t, 1H); 3.14-2.87 (m, 5H); 2.64-2.35 (m, 4H); 2.05-1.80 (m, 2H)
MS (ESI+): m/z=397 [M+H]+
Step 1: 4-[(4-fluorophenyl)thio]-N-1-naphthylbutanamide
Prepared from 4-[(4-fluorophenyl)thio]butanoic acid [18850-56-1] and commercial 1-naphthylamine in 83% yield.
Step 2: to a solution of 4-[(4-fluorophenyl)thio]-N-1-naphthylbutanamide (100 mg, 0.295 mmol) in 2 mL of N,N-dimethylformamide were added sodium hydride (60% dispersion in mineral oil, 12 mg, 0.295 mmol). The mixture was stirred 30 minutes at room temperature and iodomethane (20 μL, 0.325 mmol) were added. The mixture was stirred 3 hours at room temperature then water was added. The resulting mixture was extracted 3 times with ethyl acetate, the combined organic layers were dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (cyclohexane/ethyl acetate 9/1) to give 64 mg (62% yield) of 4-[(4-fluorophenyl)thio]-N-methyl-N-1-naphthylbutanamide.
NMR-1H (CDCl3): δ (ppm) 8.01-7.85 (m, 2H); 7.82-7.70 (m, 1H); 7.65-7.45 (m, 3H); 7.38-7.29 (dd, 1H); 7.23-7.12 (m, 2H); 6.97-6.84 (m, 2H); 3.35 (s, 3H); 2.75 (dt, 2H); 2.27-1.75 (m, 4H)
MS (ESI+): m/z=354 [M+H]+
General Procedure H: synthesis of 4-arylpyrazole
To a solution of the starting material (1 eq) in N,N-dimethylformamide (1.7 mL/mmol) were added anhydrous potassium carbonate (1.5 eq) and ethyl 4-bromobutyrate (1.2 eq). The mixture was stirred at room temperature overnight, then water was added. The mixture was extracted 3 times with ethyl acetate, the organic layers were combined, dried on anhydrous MgSO4, filtered and concentrated in vacuum to afford the title compound which was used without purification.
The bromo-pyrazole (1 eq), the boronic acid (1.2 eq), Pd(PPh3)4 (0.05 eq), an aqueous solution 1M of K2CO3 (2 eq), toluene (2.2 mL/mmol of bromo-pyrazole), methanol (2.2 mL/mmol of bromo-pyrazole) were charged in a sealed vial and heated 20 minutes at 150° C. on a microwave apparatus (Biotage). Water was added and the mixture was washed 3 times with ethyl acetate. The aqueous layer was acidified to pH=2 with 1N HCl, then extracted 3 times with ethyl acetate. The organic layers were combined, dried on anhydrous MgSO4, filtered and concentrated in vacuum to afford the acid which was used without purification.
This step was performed using general coupling procedure B.
The bromo-pyrazole (1 eq), the boronic acid (1.2 eq), Pd(PPh3)4 (0.05 eq), an aqueous solution 1M of K2CO3 (2 eq), toluene (2.2 mL/mmol of bromo-pyrazole), methanol (2.2 mL/mmol of bromo-pyrazole) were charged in a sealed vial and heated 20 minutes at 150° C. on a microwave apparatus (Biotage). Water was added and the mixture was extracted 3 times with ethyl acetate. The organic layers were combined, dried on anhydrous MgSO4, filtered and concentrated in vacuum. The residue was purified by flash chromatography (silica gel) with the appropriate gradient determined by TLC to afford the title 4-arylpyrazole.
General Procedure J: Synthesis of 5-aryloxazole
To a solution of the aminoacetophenone hydrochloride (1 eq) in pyridine at 0° C. was slowly added methyl 4-(chloroformyl)butyrate (1 eq) then the mixture was stirred 24 hours at room temperature. The mixture was partitioned between water and dichloromethane then extracted 3 times with dichloromethane. The organic layers were combined, dried on anhydrous MgSO4, filtered and concentrated in vacuum. The residue was triturated in ethanol/diethyl ether and the precipitated was filtered to afford the title amide.
To a solution of the amide (1 eq) in chloroform (4 mL/mmol) was added phosphorous pentoxide (4 eq), then the mixture was refluxed 24 hours. Ice was added to the cooled mixture then it was neutralised with a saturated aqueous solution of NaHCO3. The mixture was extracted 3 times with dichloromethane and the organic layers were combined, dried on anhydrous MgSO4, filtered and concentrated in vacuum to afford the title oxazole.
To a solution of the ester (1 eq) in methanol was added 4N NaOH (4 eq), then the mixture was stirred 2 hours at room temperature. The solvent was distilled off in vacuum and water was added. The mixture was acidified with 4N HCl and the precipitate was filtered to give the title acid.
This step was performed using general coupling procedure B.
Step 1: ethyl 4-(4-bromopyrazol-1-yl)butanoate
Prepared from commercial 4-bromopyrazole [2075-45-8].
NMR-1H (CDCl3): δ (ppm) 7.46 (s, 1H); 7.41 (s, 1H); 4.16 (q, 2H); 4.12 (t, 2H); 2.29 (t, 2H); 2.16 (q, 2H); 1.26 (t, 3H)
MS (ESI+): m/z=261/263 [M+H]+
Step 2: 4-[4-(4-fluorophenyl)pyrazol-1-yl]butanoic acid
Prepared from compound of step 1 and commercial 4-fluorobenzeneboronic acid [1765-93-1].
MS (ESI+): m/z=249 [M+H]+
Step 3: N-(5-fluoro-2-methoxybenzyl)-4-[4-(4-fluorophenyl)pyrazol-1-yl]-N-methylbutanamide
Prepared from compound of step 2 and 5-fluoro-2-methoxy-N-methylbenzylamine [823188-87-0] in 91% yield.
NMR-1H (CDCl3): δ (ppm) 7.73-7.41 (massif, 4H); 7.04 (t, 2H); 6.94-6.70 (massif, 3H); 4.50 (d, 2H); 4.26 (dt, 2H); 3.77 (d, 3H); 2.93 (d, 3H); 2.40-2.21 (massif, 4H)
MS (ESI+): m/z=400 [M+H]+
Step 1: ethyl 4-(4-bromo-3-methylpyrazol-1-yl)butanoate
Prepared from commercial 4-bromo-3-methylpyrazole [13808-64-5].
MS (ESI+): m/z=275/277 [M+H]+
Step 2: 4-[4-(4-fluorophenyl)-3-methylpyrazol-1-yl]butanoic acid
Prepared from compound of step 1 and commercial 4-fluorobenzeneboronic acid [1765-93-1].
MS (ESI+): m/z=263 [M+H]+
Step 3: N-(5-fluoro-2-methoxybenzyl)-4-[4-(4-fluorophenyl)-3-methylpyrazol-1-yl]-N-methylbutanamide
Prepared from compound of step 2 and 5-fluoro-2-methoxy-N-methylbenzylamine [823188-87-0] in 42% yield.
NMR-1H (CDCl3): δ (ppm) 7.55-7.21 (massif, 3H); 7.13-6.99 (massif, 2H); 6.96-6.66 (massif, 3H); 4.49 (d, 2H); 4.24-4.11 (massif, 2H); 3.80-3.75 (massif, 3H); 2.97-2.91 (massif, 3H); 2.45-2.10 (massif, 7H)
MS (ESI+): m/z=414 [M+H]+
Step 1: ethyl 4-(4-bromo-3,5-dimethylpyrazol-1-yl)butanoate
Prepared from commercial 4-bromo-3,5-dimethylpyrazole [3398-16-1].
MS (ESI+): m/z=289/291 [M+H]+
Step 2: 4-[4-(4-fluorophenyl)-3,5-dimethylpyrazol-1-yl]butanoic acid
Prepared from compound of step 1 and commercial 4-fluorobenzeneboronic acid [1765-93-1].
MS (ESI+): m/z=277 [M+H]+
Step 3: N-(5-fluoro-2-methoxybenzyl)-4-[4-(4-fluorophenyl)-3-methylpyrazol-1-yl]-N-methylbutanamide
Prepared from compound of step 2 and 5-fluoro-2-methoxy-N-methylbenzylamine [823188-87-0] in 54% yield.
NMR-1H (CDCl3): δ (ppm) 7.21-7.04 (massif, 4H); 6.97-6.70 (massif, 3H); 4.51 (d, 2H); 4.12 (m, 2H); 3.79 (d, 3H); 2.95 (d, 3H); 2.42 (q, 2H); 2.27-2.09 (massif, 8H)
MS (ESI+): m/z=428 [M+H]+
Prepared according general procedure B from 4-[4-(4-fluorophenyl)pyrazol-1-yl]butanoic acid (see Example 170) and 5-chloro-2-methoxy-N-methylbenzylamine [823188-85-8] in 47% yield.
NMR-1H (CDCl3): δ (ppm) 7.56-7.32 (massif, 4H); 7.25-6.91 (massif, 4H); 6.76 (t, 1H); 4.48 (d, 2H); 4.26 (m, 2H); 3.78 (d, 3H); 2.92 (d, 3H); 2.42-2.14 (massif, 4H)
MS (ESI+): m/z=416 [M+H]+
Prepared according general procedure I from 4-(4-bromopyrazol-1-yl)-N-(5-fluoro-2-methoxybenzyl)-N-methylbutanamide (see below) and commercial 4-methoxybenzeneboronic acid [5720-07-0] in 50% yield.
NMR-1H (CDCl3): δ (ppm) 7.73-7.31 (massif, 4H); 6.97-6.67 (massif, 5H); 4.49 (d, 2H); 4.21 (m, 2H); 3.80 (d; 3H); 2.93 (d, 3H); 2.38-2.12 (massif, 4H)
MS (ESI+): m/z=412 [M+H]+
4-(4-Bromopyrazol-1-yl)-N-(5-fluoro-2-methoxybenzyl)-N-methylbutanamide was prepared according general coupling procedure B from 4-(4-bromopyrazol-1-yl)butanoic acid [898054-60-9] and 5-fluoro-2-methoxy-N-methylbenzylamine [823188-87-0] in 66% yield. NMR-1H (CDCl3): δ (ppm) 7.50-7.35 (massif, 2H); 7.02-6.68 (massif, 3H); 4.49 (d, 2H); 4.25 (m, 2H); 3.81 (d; 3H); 3.75 (s, 3H), 2.92 (d, 3H); 2.41-2.13 (massif, 4H)
MS (ESI+): m/z=384/386 [M+H]+
Prepared according general procedure I from 4-(4-bromopyrazol-1-yl)-N-(5-fluoro-2-methoxybenzyl)-N-methylbutanamide (see Example 174) and commercial 4-fluoro-2-methylbenzeneboronic acid [139911-29-8] in 97% yield.
NMR-1H (CDCl3): δ (ppm) 7.74-7.41 (massif, 4H); 7.27-7.16 (massif, 1H); 6.99-6.67 (massif, 3H); 4.50 (d, 2H); 4.27 (m, 2H); 3.78 (d; 3H); 2.93 (d, 3H); 2.43-2.19 (massif, 4H); 2.34 (d, 3H)
MS (ESI+): m/z=414 [M+H]+
Prepared according general procedure I from 4-(4-bromopyrazol-1-yl)-N-(5-fluoro-2-methoxybenzyl)-N-methylbutanamide (see Example 174) and commercial 4-hydroxybenzeneboronic acid [71597-85-8] in 70% yield.
NMR-1H (CDCl3): δ (ppm) 7.67 (d, 1H); 7.48 (d, 1H); 7.31-7.23 (massif, 2H); 6.96-6.69 (massif, 5H); 4.50 (d, 2H); 4.23 (m, 2H); 3.76 (d; 3H); 2.93 (d, 3H); 2.44-2.19 (massif, 4H)
MS (ESI+): m/z=398 [M+H]+
Prepared according general procedure I from 4-(4-bromopyrazol-1-yl)-N-(5-fluoro-2-methoxybenzyl)-N-methylbutanamide (see Example 174) and commercial 4-cyanobenzeneboronic acid [126747-14-6] in 10% yield.
NMR-1H (CDCl3): δ (ppm) 7.80 (d, 1H); 7.73 (d, 1H); 7.68-7.48 (massif, 4H); 6.98-6.67 (massif, 3H); 4.50 (d, 2H); 4.29 (m, 2H); 3.78 (d; 3H); 2.94 (d, 3H); 2.43-2.19 (massif, 4H)
MS (ESI+): m/z=407 [M+H]+
Prepared according general procedure I from 4-(4-bromopyrazol-1-yl)-N-(5-fluoro-2-methoxybenzyl)-N-methylbutanamide (see Example 174) and commercial 4-pyridinylboronic acid [1692-15-5] in 33% yield.
NMR-1H (CDCl3): δ (ppm) 8.54 (brs, 1H); 7.84 (d, 1H); 7.77 (d, 1H); 7.38-7.29 (massif, 2H); 6.97-6.68 (massif, 3H); 4.50 (d, 2H); 4.30 (m, 2H); 3.77 (d; 3H); 2.94 (d, 3H); 2.43-2.18 (massif, 4H)
MS (ESI+): m/z=383 [M+H]+
Step 1: 4-[4-(4-fluorophenyl)pyrazol-1-yl]-N-isoquinolin-1-yl-butamide
Prepared according general procedure B from 4-[4-(4-fluorophenyl)pyrazol-1-yl]butanoic acid (see Example 170) and commercial 1-aminoisoquinoline [1532-84-9]. The amide was obtained with a 50% purity and used without purification.
MS (ESI+): m/z=375 [M+H]+
Step 2: 4-[4-(4-fluorophenyl)pyrazol-1-yl]-N-isoquinolin-1-yl-N-methylbutamide
To a solution of -[4-(4-fluorophenyl)pyrazol-1-yl]-N-isoquinolin-1-yl-butamide (86 mg, 0.223 mmol) in 2 mL of N,N-dimethylformamide were added sodium hydride (60% dispersion in mineral oil, 18.4 mg, 0.46 mmol). The mixture was stirred 30 minutes at room temperature and iodomethane (43 μL, 0.69 mmol) were added. The mixture was stirred overnight at room temperature then water was added. The resulting mixture was extracted 3 times with ethyl acetate, the combined organic layers were dried with anhydrous MgSO4, filtered and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (cyclohexane/ethyl acetate 8/2 to 0/10) to afford 11 mg (12% yield) of the title compound.
NMR-1H (CDCl3): δ (ppm) 8.36 (d, 1H); 7.92-7.81 (massif, 2H); 7.76-7.45 (massif, 5H); 7.41-7.29 (massif, 2H); 7.05 (t, 2H); 4.12 (brs, 2H); 3.40 (s; 3H); 2.24-1.94 (massif, 4H)
MS (ESI+): m/z=389 [M+H]+
N-(5-Fluoro-2-methoxybenzyl)-4-[5-(4-methoxyphenyl)oxazol-2-yl]-N-methylbutanamide
Step 1: methyl 4-{[2-(4-bromophenyl)-2-oxoethyl]amino}-4-oxobutanoate
Prepared from commercial 2-amino-4′-methoxyacetophenone hydrochloride [3883-94-1] in 61% yield.
NMR-1H (DMSO-d6): δ (ppm) 7.96 (d, 2H); 6.97 (d, 2H); 6.61 (brs, 1H); 4.71 (d, 2H); 3.89 (s, 3H); 3.69 (s, 3H); 2.47-2.34 (massif, 4H); 2.02 (m, 2H)
MS (ESI+): m/z=294 [M+H]+
Step 2: methyl 4-[5-(4-methoxyphenyl)oxazol-2-yl]butanoate
Prepared from compound of step 1 in 82% yield.
MS (ESI+): m/z=276 [M+H]+
Step 3: 4-[5-(4-methoxyphenyl)oxazol-2-yl]butanoic acid
Prepared from compound of step 2 in 98% yield.
NMR-1H (DMSO-d6): δ (ppm) 12.10 (brs, 1H); 7.58 (d, 2H); 7.37 (s, 1H); 7.00 (d, 2H); 3.78 (s, 3H); 2.80 (t, 2H); 2.33 (t, 2H); 1.92 (m, 2H)
Step 4: N-(5-fluoro-2-methoxybenzyl)-4-[5-(4-methoxyphenyl)oxazol-2-yl]-N-methylbutanamide
Prepared from compound of step 3 and 5-fluoro-2-methoxy-N-methylbenzylamine [823188-87-0] in 70% yield.
NMR-1H (CDCl3): δ (ppm) 7.51 (t, 2H); 7.06 (d, 1H); 6.97-6.71 (massif, 5H); 4.52 (d, 2H); 3.83 (s, 3H); 3.78 (d; 3H); 2.99-2.84 (massif, 5H); 2.49 (m, 2H); 2.19 (m, 2H)
MS (ESI+): m/z=413 [M+H]+
General Procedure K: Synthesis of 3-arylpyrazole
To a solution of the starting material (1 eq) in N,N-dimethylformamide (1.7 mL/mmol) were added anhydrous potassium carbonate (1.5 eq) and ethyl 4-bromobutyrate (1.2 eq). The mixture was stirred at room temperature overnight, then 3 to 6 hours at 100° C. After cooling, water was added and the resulting mixture was extracted 3 times with ethyl acetate, the organic layers were combined, dried on anhydrous MgSO4, filtered and concentrated in vacuum to afford the title compound which was used without purification.
To a solution of the ester (1 eq) in methanol was added 4N NaOH (4 eq), then the mixture was stirred 2 to 4 hours at room temperature. The solvent was distilled off in vacuum and water was added. The mixture was acidified with 4N HCl and the precipitate was filtered to give the title acid.
This step was performed using general coupling procedure B.
Step 1: ethyl 4-[3-(4-fluorophenyl)pyrazol-1-yl]butanoate
Prepared from commercial 3-(4-fluorophenyl)pyrazole [154258-82-9] and used without purification.
MS (ESI+): m/z=277 [M+H]+
Step 2: 4-[3-(4-fluorophenyl)pyrazol-1-yl]butanoic acid
Prepared from compound of step 1 in 99% yield.
MS (ESI+): m/z=249 [M+H]+
Step 3: N-(5-fluoro-2-methoxybenzyl)-4-[3-(4-fluorophenyl)pyrazol-1-yl]-N-methylbutamide
Prepared from compound of step 2 and 5-fluoro-2-methoxy-N-methylbenzylamine [823188-87-0] in 47% yield.
NMR-1H (CDCl3): δ (ppm) 7.80-7.66 (massif, 2H); 7.39 (dd, 1H); 7.15-6.56 (massif, 5H); 6.45 (dd, 1H); 4.48 (d, 2H); 4.26 (m, 2H); 3.76 (d, 3H); 2.92 (d, 3H); 2.43-2.20 (massif, 4H)
MS (ESI+): m/z=400 [M+H]+
N-(5-Fluoro-2-methoxybenzyl)-4-[3-(4-methoxyphenyl)pyrazol-1-yl]-N-methylbutamide
Step 1: ethyl 4-[3-(4-methoxyphenyl)pyrazol-1-yl]butanoate
Prepared from commercial 3-(4-methoxyphenyl)pyrazole [27069-17-6] and used without purification.
NMR-1H (CDCl3): δ (ppm) 7.72 (d, 2H); 7.37 (d, 1H); 6.92 (d, 2H); 6.45 (d, 1H); 4.26-4.07 (massif, 4H2H); 3.84 (d, 3H); 2.41-2.09 (massif, 4H); 1.26 (m, 3H)
Step 2: 4-[3-(4-methoxyphenyl)pyrazol-1-yl]butanoic acid
Prepared from compound of step 1 in 75% yield.
Step 3: N-(5-fluoro-2-methoxybenzyl)-4-[3-(4-methoxyphenyl)pyrazol-1-yl]-N-methylbutamide
Prepared from compound of step 2 and 5-fluoro-2-methoxy-N-methylbenzylamine [823188-87-0] in 58% yield.
NMR-1H (CDCl3): δ (ppm) 7.80-7.66 (massif, 2H); 7.70 (dd, 2H); 7.38 (dd, 1H); 7.01-6.66 (massif, 5H); 6.44 (dd, 1H); 4.49 (d, 2H); 3.89-3.70 (m, 6H); 2.92 (d, 3H); 2.43-2.20 (massif, 4H)
MS (ESI+): m/z=412 [M+H]+
Step 1: 4-Chloro-1-(6-methoxy-2,3-dihydroindol-1-yl)butanone
4-Chlorobutyryl chloride (229 μL, 2 mmol, 1 eq) was added dropwise to a mixture of 6-Methoxy-2,3-dihydro-1H-indole1 (305 mg, 2 mmol) and DIPEA (697 μL, 4 mmol, 2 eq) solubilised in THF (9 mL) and cooled at 4° C. After addition, the suspension was stirred at room temperature for 1 hour. Water (15 mL) and AcOEt (15 mL) were added. The aqueous phase was extracted 2 times with ethyl acetate. The combined organic layers were washed successively with HCl 1N, saturated NaHCO3 and brine. After drying (Na2SO4) and filtration, evaporation of the solvent yielded an off-white solid which was purified by recrystallisation from a mixture of ethyl acetate and pentane (426 mg, 84%).
NMR-1H (CDCl3): δ (ppm) 7.85 (d, 1H); 6.98 (d, 1H); 6.51 (dd, 1H); 4.03 (t, 2H); 3.74 (s, 3H); 3.45 (t, 2H), 3.07 (t, 2H); 2.55 (t, 2H); 2.15 (quint., 2H).
MS (ESI+): m/z=254 [M+H]+1Reagent was prepared according to literature procedure J. Med. Chem. 2004, 47, 5451-5466 from 6-Methoxy-1H-indole
Step 2: 5-Ethyl-2-fluoromercaptobenzoate (112 μL, 0.694 mmol, 1.3 eq.) was added to a suspension of NaH (60% in mineral oil, 28 mg, 0.694 mmol, 1.3 eq.) in DMF (1 mL) at 0° C. After the mixture was stirred for 0.5 h, a solution of 4-chloro-1-(6-methoxy-2,3-dihydroindol-1-yl)butanone (135 mg, 0.533 mmol, 1 eq.) in DMF (1 mL) was added dropwise at 0° C. The reaction mixture was stirred at room temperature for 3 hours. The mixture was quenched with water (5 mL) and extracted with ethyl acetate/diethyl ether (1/1) (3×5 mL). The organic phase was washed with brine, dried (Na2SO4) and evaporated to dryness. Crude product was triturated in a mixture of diethylether/pentane, filtrated and washed (pentane) affording the title compound (145 mg, 65%) as a white solid.
NMR-1H (CDCl3): δ (ppm) 7.92 (d, 1H) 7.65 (dd, 1H); 7.40 (dd, 1H); 7.17 (ddd, 1H); 7.04 (d, 1H); 6.57 (dd, 1H), 4.38 (q, 2H); 4.05 (t, 2H); 3.80 (s, 3H); 3.11 (t, 2H) 3.08 (t, 2H), 2.62 (t, 2H), 2.16 (quint., 2H), 1.40 (t, 3H).
MS (ESI+): m/z=418 [M+H]+
White solid (77%)
NMR-1H (CDCl3): δ (ppm) 7.94 (m, 2H); 7.42 (m, 2H); 7.16 (m, 1H); 7.04 (d, 1H); 6.57 (dd, 1H); 4.38 (q, 2H); 4.04 (t, 2H); 3.80 (s, 3H); 3.10 (m, 4H); 2.63 (t, 2H), 2.19 (quint., 2H), 1.40 (t, 3H).
MS (ESI+): m/z=400 [M+H]+
Beige solid (65%)
NMR-1H (CDCl3): δ (ppm) 7.93 (d, 1H); 7.31 (d, 1H); 7.00-7.19 (m, 4H); 6.57 (dd, 1H); 4.04 (t, 2H); 3.80 (s, 3H); 3.11 (t, 2H) 3.06 (t, 2H), 2.60 (t, 2H), 2.37 (s, 3H), 2.11 (quint., 2H)
MS (ESI+): m/z=342 [M+H]+
Beige solid (48%)
NMR-1H (CDCl3): δ (ppm) 7.92 (d, 1H); 7.35 (m, 2H); 7.04 (d, 1H); 6.83 (m, 2H); 6.57 (dd, 1H); 4.02 (t, 2H); 3.80 (s, 3H); 3.77 (s, 3H); 3.10 (t, 2H); 2.97 (m, 2H), 2.56 (t, 2H), 2.02 (quint., 2H).
MS (ESI+): m/z=358 [M+H]+
White solid (62%)
NMR-1H (CDCl3): δ (ppm) 7.94 (m, 2H); 7.43 (m, 2H); 7.16 (m, 1H); 7.04 (d, 1H); 6.57 (dd, 1H); 4.04 (t, 2H); 3.91 (s, 3H); 3.80 (s, 3H); 3.10 (m, 4H); 2.63 (t, 2H); 2.20 (quint., 2H)
MS (ESI+): m/z=386 [M+H]+
Prepared using the same procedure as example 183, starting from commercially available methyl salicylate.
White solid, 8%.
NMR-1H (CDCl3): δ (ppm) 7.94 (d, 1H); 7.78 (dd, 1H); 7.44 (ddd, 1H); 6.93-7.06 (m, 3H); 6.57 (dd, 1H); 4.18 (t, 2H); 4.12 (t, 2H); 3.87 (s, 3H); 3.80 (s, 3H); 3.10 (t, 2H); 2.76 (t, 2H); 2.27 (quint., 2H).
MS (ESI+): m/z=370 [M+H]+
White solid (44%)
NMR-1H (CDCl3): δ (ppm) 7.93 (d, 1H); 7.32 (dd, 1H); 7.18 (td, 1H); 7.04 (d, 1H); 6.91 (td, 1H); 6.84 (br d, 1H); 6.57 (dd, 1H); 4.04 (t, 2H); 3.88 (s, 3H); 3.80 (s, 3H) 3.10 (t, 2H); 3.06 (t, 2H); 2.60 (t, 2H); 2.09 (quint., 2H).
MS (ESI+): m/z=358 [M+H]+
NMR-1H (DMSO-d6): δ (ppm) 13.32 (s, br, 1H); 7.74 (d, 1H); 7.60 (dd, 1H); 7.52 (dd, 1H); 7.40 (td, 1H); 7.10 (d, 1H); 6.55 (dd, 1H); 4.07 (t, 2H); 3.70 (s, 3H); 2.93-3.10 (m, 4H); 2.61 (t, 2H); 1.89 (quint., 2H).
MS (ESI+): m/z=390 [M+H]+
Ethyl 5-fluoro-2-((4-(6-methoxy-2,3-dihydro-1H-indol-1-yl)-4-oxobutyl)thio)benzoate (20 mg, 46 μmol) was dissolved in THF (0.5 mL) and MeOH (0.5 mL), then LiOH (1.7 mg, 1.5 eq) in H2O (0.5 mL) was added and the mixture stirred at rt for 2 h. More LiOH (2 mg) in H2O (0.5 mL) was added and stirring continued for 2 h at rt. Organic solvents were evaporated then the residue was diluted with water and extracted using Et2O. The basic aqueous phase was then made acidic using HCl 1N and extracted using AcOEt. After drying (Na2SO4) the solvent was removed under vacuum. The yellow oily residue was triturated in Et2O, causing precipitation. The title compound was isolated by filtration as a white solid (15.5 mg, 83%).
Ethyl 5-fluoro-2-((4-(6-methoxy-2,3-dihydro-1H-indol-1-yl)-4-oxobutyl)thio)benzoate (50 mg, 0.12 mmol) was dissolved in DCM (5 mL) at rt, then mCPBA (−70%, 29 mg, 1 eq) was added and the mixture was stirred at rt for 3 h. After evaporation of DCM, the residue was partitioned between AcOEt and H2O. The organic phase was then extracted using AcOEt. The combined organic phases were washed using saturated aqueous NaHCO3, dried over Na2SO4 and concentrated under reduced pressure. The resulting oily residue was purified by silica gel chromatography (pentane/AcOEt 2/8) to give sulfone 15966 (6 mg, 10%) and then sulfoxide 15965 (45 mg, 86%).
15965 (Yellow oil)
NMR-1H (CDCl3): δ (ppm) 8.24 (dd, 1H) 7.90 (d, 1H); 7.75 (dd, 1H); 7.47 (ddd, 1H); 7.04 (d, 1H); 6.57 (dd, 1H); 4.03-4.28 (m, 4H); 3.78 (s, 3H); 3.20-3.34 (m, 1H) 3.13 (t, 2H); 2.60-2.89 (m, 3H), 2.17-2.44 (m, 2H); 1.30 (t, 3H).
MS (ESI+): m/z=434 [M+H]+
15966 (yellow oil)
NMR-1H (CDCl3): δ (ppm) 8.10 (dd, 1H) 7.89 (d, 1H); 7.38 (dd, 1H); 7.31 (ddd, 1H); 7.04 (d, 1H); 6.58 (dd, 1H); 4.42 (q, 2H); 4.06 (t, 2H); 3.79 (s, 3H); 3.67 (t, 2H) 3.13 (t, 2H); 2.68 (t, 2H); 2.25 (quint., 2H); 1.40 (t, 3H).
MS (ESI+): m/z=450 [M+H]+
Prepared using the same procedure as in example 183, starting from commercially available 3-fluoro-N-methylaniline [1978-37-6].
Colorless oil, 56%.
NMR-1H (CDCl3): δ (ppm) 7.63 (d, 1H); 7.30-7.43 (m, 2H); 7.16 (ddd, 1H); 7.06 (t, 1H); 6.97 (d, 1H); 6.90 (dt, 1H); 4.36 (q, 2H); 3.25 (s, 3H); 2.92 (t, 2H); 2.18-2.34 (m, 2H); 1.98 (quint., 2H); 1.39 (t, 3H).
MS (ESI+): m/z=394 [M+H]+
Under N2, NaH (60% in mineral oil, 4 mg, 0.1 mmol, 1.02 eq) was suspended in THF (2 mL), then N-hydroxyacetimidamide (10.6 mg, 1.5 eq) was added and the mixture stirred at rt for 10 min and then at 50° C. for 50 min. This mixture was then cooled at rt, ester 15959 (40 mg, 0.096 mmol, 1 eq) in THF (0.5 mL+0.5 mL rinse) was added and the resulting mixture heated at reflux for 3 h. The mixture was cooled at rt, H2O (2 mL) and AcOEt (2 mL) were added. The aqueous phase was extracted using AcOEt, then the combined organic phases were washed (H2O and brine), dried (Na2SO4) and concentrated to a yellow residue. Purification by preparative TLC (Pentane/AcOEt 7/3) afforded title compound (17 mg, 42%) as a pale yellow solid.
NMR-1H (CDCl3): δ (ppm) 7.91 (d, 1H); 7.72 (dd, 1H); 7.54 (dd, 1H); 7.22 (td, 1H); 7.04 (d, 1H); 6.57 (dd, 1H); 4.03 (t, 2H); 3.80 (s, 3H); 3.12 (t, 2H); 3.10 (t, 2H); 2.58 (t, 2H); 2.50 (s, 3H); 2.13 (quint., 2H).
MS (ESI+): m/z=428 [M+H]+
Ethyl 5-fluoro-2-({4-[(3-methoxyphenyl)(methyl)amino]-4-oxobutyl}thio)benzoate
Prepared using the same procedure as example 183, starting from commercially available 3-methoxy-N-methylaniline.
Yellow oil, 71%.
NMR-1H (CDCl3): δ (ppm) 7.63 (dd, 1H); 7.26-7.37 (m, 2H); 7.16 (ddd, 1H); 6.88 (dd, 1H); 6.75 (d, 1H); 6.70 (t, 1H); 4.36 (q, 2H); 3.81 (s, 3H); 3.25 (s, 3H); 2.90 (t, 2H); 2.28 (t, 2H); 1.97 (quint., 2H); 1.38 (t, 3H).
MS (ESI+): m/z=406 [M+H]+
Prepared using the same procedure as example 183, starting from commercially available 2-methoxy-N-methylaniline.
Pale yellow oil, 63%.
NMR-1H (CDCl3): δ (ppm) 7.62 (dd, 1H); 7.39-7.28 (m, 2H); 7.21-7.10 (m, 2H); 6.96 (m, 2H); 4.35 (q, 2H); 3.80 (s, 3H); 3.17 (s, 3H); 2.88 (t, 2H); 2.28-2.12 (m, 2H); 1.94 (quint., 2H); 1.38 (t, 3H).
MS (ESI+): m/z=406 [M+H]+
Prepared using the same procedure as example 183, starting from commercially available 4-methoxy-N-methylaniline.
Orange oil, 75%.
NMR-1H (CDCl3): δ (ppm) 7.63 (dd, 1H); 7.33 (dd, 1H); 7.16 (ddd, 1H); 7.03-7.11 (m, 2H); 6.95-6.86 (m, 2H); 4.36 (q, 2H); 3.83 (s, 3H); 3.22 (s, 3H); 2.89 (t, 2H); 2.23 (t, 2H); 1.95 (quint., 2H); 1.38 (t, 3H).
MS (ESI+): m/z=406 [M+H]+
Prepared using the same procedure as example 194 starting from example 188.
Off white solid, 52%.
NMR-1H (CDCl3): δ (ppm) 7.99 (d, 1H); 7.92 (d, 1H); 7.48 (m, 2H); 7.26 (m, 1H); 7.03 (d, 1H); 6.59 (dd, 1H); 4.02 (t, 2H); 3.80 (s, 3H); 3.16 (t, 2H); 3.10 (t, 2H); 2.60 (t, 2H); 2.51 (s, 3H); 2.17 (quint., 2H).
MS (ESI+): m/z=410 [M+H]+
(48 mg, 0.12 mmol) was dissolved in DCM (5 mL) at rt, then mCPBA (˜70%, 50 mg, 1.8 eq) was added and the mixture was stirred at rt over night. After evaporation of DCM, the residue was partitioned between AcOEt and H2O. The organic phase was then extracted using AcOEt. The combined organic phases were washed using saturated aqueous NaHCO3, dried over Na2SO4 and concentrated. The resulting oily residue was purified by silica gel chromatography (pentane/AcOEt 2/8) to give the sulfone as an orange solid that was triturated and sonicated in Et2O, filtrated and dried to give the title compound as a slightly orange solid (27 mg, 52%)
NMR-1H (CDCl3): δ (ppm) 8.23 (d, 1H); 7.89-7.77 (m, 4H); 7.05 (d, 1H); 6.59 (dd, 1H); 4.06 (t, 2H); 3.83 (t, 2H); 3.79 (s, 3H); 3.13 (t, 2H); 2.71 (t, 2H); 2.48 (s, 3H); 2.29 (quint., 2H).
MS (ESI+): m/z=442 [M+H]+
Under N2, NaH (12.5 mg, 0.31 mmol 1.1 eq) was suspended in dry THF (1 mL) and cooled at 0° C. Methyl 2-(4-(6-methoxy-2,3-dihydro-1H-indol-1-yl)-4-oxobutoxy)benzoate (100 mg, 0.28 mmol, 1 eq) in THF (0.5 mL) was added and the mixture stirred at 0° C. for 30 min, then Methyl iodide (35 μL, 0.56 mmol, 2 eq) was added and the mixture stirred at rt overnight. The mixture was quenched with water (5 mL) and extracted with ethyl acetate. The organic phase was washed with brine, dried (Na2SO4) and evaporated to dryness to provide the title compound as an off white solid (31 mg, 30%).
NMR-1H (CDCl3): δ (ppm) 7.92 (d, 1H); 7.39 (br d, 2H); 7.26-7.15 (m, 2H); 7.04 (d, 1H); 6.57 (dd, 1H); 4.57 (s, 2H); 4.02 (t, 2H); 3.80 (s, 3H); 3.43 (s, 3H); 3.20 (t, 2H); 3.07 (t, 2H); 2.56 (t, 2H); 2.09 (quint., 2H).
MS (ESI+): m/z=372 [M+H]+
Prepared using the same procedure as example 183, starting from commercially available ethyl salicylate.
White solid, 15%.
NMR-1H (CDCl3): δ (ppm) 7.94 (d, 1H); 7.77 (dd, 1H); 7.43 (ddd, 1H); 6.92-7.07 (m, 3H); 6.56 (dd, 1H); 4.34 (q, 2H); 4.17 (t, 2H); 4.11 (t, 2H); 3.80 (s, 3H); 3.10 (t, 2H); 2.76 (t, 2H); 2.26 (quint., 2H); 1.37 (t, 3H).
MS (ESI+): m/z=384 [M+H]+
Several assays have been described (in Antiviral Methods and Protocols edited by Derek Kinchington and Raymond F. Schinazi, 2000, Humana press Inc. Totowa, N.J.; Techniques in HIV research. Editors Aldovini A. & Walker B D New York: Stockton Press. 1990; Liu R, Chen B, Landau N R. Use of Luciferase Reporter Viruses for Studying HIV Entry. Methods in Molecular Medicine, Vol 17 HIV Protocols. ed. Michael N L, Kim J H. 35-40. Humana Press Inc, Totowa, N.J. 1999.) to measure the antiviral activity anti-HIV by compounds. In particular, assays may be based on multiple rounds infection experiments by measuring the production of capsid antigen CA p24 by target cells infected with replication competent HIV, or on single round infection experiments by assay of the activity of a reporter luciferase gene inserted in the HIV viral genome deleted of its Env gene and pseudotyped by heterologous envelope such as the glycoprotein g from the vesicular stomatitis virus (VSV).
1)) Single cycle infection assay of the expression of the Firefly Luciferase reporter gene harboured by Env-deleted NL4-3 vector virus pseudotyped with the VSV g envelope (Rose J K, Bergmann J E. Expression from cloned cDNA of cell-surface secreted forms of the glycoprotein of vesicular stomatitis virus in eukaryotic cells. Cell, 1982 October; 30(3): 753-62.)
To generate the envelope-deleted NL4-3 vector (NL4-3Δenv), a frameshift was introduced in the env gene. The NdeI site (nt6399) in pNL4-3 was digested, filled with Klenow, and religated. The Firefly Luciferase gene (De Wet et al Mol Cell Biol. 1987 February; 7(2):725-37.) was then inserted in the Nef gene at the XBO1 site resulting in the pNL4-3Δenv-Luc plasmid.
Virus stocks were produced by co-transfecting human embryonic kidney 293 T cells using the calcium phosphate method with the pNL4-3Δenv-Luc construct and the expression vector encoding the vesicular stomatitis virus [VSV] g envelope. Supernatants were collected 2 days after transfection, and levels of HIV-1 p24 antigen were monitored by enzyme-linked immunoabsorbent assay (BD Biosciences). Target cells, Sup T1 or MT4 human T cell lines, or Primary human Blood Mononuclear Cells (PBMC) isolated from non infected normal donors and activated by IL2 at 10 U/ml and PHA at 1-2 μg/ml, as described in Kinter A. et al. CC-chemokines enhance the replication of T-tropic strains of HIV-1 in C+ T cells: Role of signal transduction. Proc. Natl. Acad. Sci. USA voll. 95, pp 11880-11885, 1998, were infected with viral doses corresponding to MOI 0.01 during 2 hours at 37° C. in 24 well plates.
After centrifugation at 3000 rpm and washings in PBS, pellet of infected cells were diluted in medium and plated in 96 well plates in the presence of test compounds at various concentrations. At day 2 post-infection, cells were lysed and luciferase activity was measured using the PROMEGA* Luciferase Assay System-10 pack (1000 assays)* (10×10 ml), ref:*E1501) according manufacturer's instructions. Cell viability was determined in parallel by MTT cell proliferation assay from LGC Promochem (ATCC), *MTT Cell Proliferation Assay, 2500 tests*, ref: *30-1010K, according manufacturer's instructions. EC50 for antiviral activity corresponded to the concentration of compound effective for a 50% inhibition of luciferase activity.
All compounds have been tested in this assay; in particular, the following compounds present an EC50 below 5 μM: Examples 3, 10, 11, 12, 13, 14, 15, 17, 19, 20, 22, 26, 27, 29, 30, 31, 34, 35, 37, 39, 41, 42, 47, 50, 53, 56, 59, 65, 69, 70, 71, 73, 74, 75, 80, 84, 85, 87, 90, 92, 93, 95, 96, 97, 98, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 128, 129, 130, 131, 132, 133, 141, 145, 147, 148, 162, 164, 168, 169, 170, 171, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 193, 195.
All compounds have been tested in this assay; in particular, the following compounds present an EC50 below 500 nM: Examples 70, 71, 84, 85, 97, 103, 104, 105, 106, 107, 108, 113, 116, 118, 120, 123, 125, 128, 129, 130, 132, 145, 162, 169, 170, 171, 173, 174, 175, 176, 177, 178, 179, 180.
2) Multiple cycle infection assay of CAp24 antigen production (according to Emiliani et al, J Biol. Chem. 2005 Jul. 8; 280(27):25517-23):
Virus stock of the NL4-3 strain of HIV-1 (Adachi et al, J. Virol. 1986 August; 59(2):284-91) was prepared as described in Lopez-Verges et al. Proc Natl Acad Sci USA. 2006 Oct. 3; 103(40):14947-52, by transfecting 1.5×106 293T cells with 20 μg of NL4-3 proviral DNA by using calcium phosphate procedure. Forty eight hours later, transfected cell supernatants were harvested, filtered through 0.22-μm-pore-size filters, quantified for HIV-1 p24 antigen by using a Coulter HIV-1 p24 antigen assay (Beckman Coulter) according manufacturer's instructions, and used in infection experiments.
SupT1 MT4 cells, or Primary human Blood Mononuclear Cells (PBMC) isolated and activated as described above, were infected with NL4-3 virus at a multiplicity of infection (MOI) 0.01, or mock infected with medium only (RPMI), during two hours at 37° C. in 24 well plates. After centrifugation at 3000 rpm and washings in PBS, pellet of infected cells were diluted in medium and plated in 96 well plates in the presence of test compounds at various concentrations. At day 4 and day −6 post-infection, aliquots of supernatant were taken and assayed for CA p24 production by Elisa assay (BD Biosciences). Cell viability was determined in parallel by MTT cell proliferation assay from LGC Promochem (ATCC), *MTT Cell Proliferation Assay, 2500 tests*, ref: *30-1010K, according manufacturer's instructions. EC50 for antiviral activity corresponded to the concentration of compound effective for a 50% inhibition of CA p24 production.
Most active compounds were tested in this assay thus confirming that they are active against wild type replication competent viruses: in particular, the following compounds present an EC50 below 5 μM: Examples 3, 10, 11, 12, 13, 14, 15, 17, 19, 20, 22, 26, 27, 29, 30, 31, 34, 35, 37, 39, 41, 42, 47, 50, 53, 56, 59, 65, 69, 70, 71, 73, 74, 75, 80, 84, 85, 87, 90, 92, 93, 95, 96, 97, 98, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 128, 129, 130, 131, 132, 133, 141, 145, 147, 148, 162, 164, 168, 169, 170, 171, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 191, 193.
Most active compounds were tested in this assay, in particular the following compounds present an EC50 below 500 nM: Examples 70, 71, 84, 85, 97, 103, 104, 105, 106, 107, 108, 113, 116, 118, 120, 123, 125, 128, 129, 130, 132, 145, 162, 169, 170, 171, 173, 174, 175, 176, 177, 178, 179, 180.
The CC50 of cytotoxicity of the tested compounds in the same cells that were used for antiviral activity testing, corresponded to the concentration that resulted in the decrease of MTT assay of 50%. All compounds had a CC50 value of 40 μM or greater.
| Number | Date | Country | Kind |
|---|---|---|---|
| 08305909.7 | Dec 2008 | EP | regional |
This application claims benefit to U.S. Provisional application No. 61/274,096 filed on 31 Mar. 2009, the disclosure of which is incorporated herein by reference in its entirety as if fully set forth herein.
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/EP2009/066853 | 12/10/2009 | WO | 00 | 9/29/2011 |
| Number | Date | Country | |
|---|---|---|---|
| 61274096 | Mar 2009 | US |
