Patent Application
20090048221
Anti-inflammatory medicaments can be classified into those of steroid and of nonsteroidal type. Steroid anti-inflammatory compounds are still the most effective ones in the treatment of inflammatory diseases and conditions such as: asthma, inflammatory nasal diseases such as allergic rhinitis, nasal polyps, intestinal diseases such as Crohn's disease, colitis, ulcerative colitis, dermatological inflammations such as eczema, psoriasis, allergic dermatitis, neurodermatitis, pruritis, conjunctivitis and rheumatoid arthritis. In addition to excellent potency and effectiveness, medicaments of this type also possess numerous unfavourable side-effects, (e.g. disturbance of carbohydrate metabolism, decreased calcium resorption, decreased excretion of endogenous corticosteroids and disturbance of physiological functions of the pituitary gland, adrenal cortex and thymus. Steroids present on the market are highly effective against inflammatory conditions and processes whereas their systemic side-effects are diminished. Patent applications WO 94/13690; 94/14834; 92/13872 and 92/13873 describe the so-called “soft” steroids or hydrolysable corticosteroids designed for topical application at the inflammation site, whereas their systemic side-effects are diminished due to the hydrolysis in the serum, wherein the active steroid very rapidly hydrolyses into the inactive form. An ideal steroid, however, without unfavourable effects in a long-term and continuous treatment as required for the control of diseases such as asthma or Crohn's disease has yet to be found, so that there are intense efforts on the discovery and development of steroids with improved therapeutic profile.
Macrolide antibiotics accumulate preferentially within different cells of subjects, especially within phagocyte cells such as mononuclear peripheral blood cells, and peritoneal and alveolar macrophages. (Gladue, R. P. et al, Antimicrob. Agents Chemother. 1989, 33, 277-282; Olsen, K. M. et al, Antimicrob. Agents Chemother. 1996, 40, 2582-2585). Inflammatory effects of some macrolides have been described in the literature, although their effects are relatively weak. For example, the anti-inflammatory effect of erythromycin derivatives (J. Antimicrob. Chemother. 1998, 41, 37-46; WO Patent Application No. 00/42055) and azithromycin derivatives has been described (EP Pat. Br. 0283055). Anti-inflammatory effects of some Wpacrolides are also known from in vitro and in vivo studies in experimental animal models such as in zymosan-induced peritonitis in mice (J. Antimicrob. Chemother. 1992, 30, 339-348) and endotoxin-induced neutrophil accumulation in rat trachea (J. Immunol. 1997, 159, 3395-4005). The modulating effect of macrolides upon cytokines such as interleukin 8 (IL-8) (Am. J. Respir. Crit. Care. Med. 1997, 156, 266-271) and interleukin 5 (IL-5) (EP Pat. No. 0775489 and EP Pat. No. 771564) is known as well. International Publication No. WO 02/055531 A1, herein incorporated by reference in its entirety, discloses conjugate compounds represented by the Formula II:
wherein M represents a macrolide subunit possessing the property of accumulation in inflammatory cells, A represents an anti-inflammatory subunit that can be steroid or nonsteroid, and L represents a linker molecule linking M and A, (b) their pharmacologically acceptable salts, prodrugs and solvates, (c) processes and intermediates for their preparation, and (d) their use in the treatment of inflammatory diseases and conditions in humans and animals. In WO 02/05531, the conjugate steroid-macrolide compounds are mostly linked with the steroid subunit at the N/9a-position of macrolide ring.
U.S. Published Application 2004 0014685 and International Publication No. WO 04/005310 A2, herein incorporated by reference in their entirety, relate to compounds represented by Formula III.
wherein M represents a macrolide subunit (macrolide moiety) derived from macrolide possessing the property of accumulation in inflammatory cells, S represents a steroid subunit derived from a steroid drug with anti-inflammatory activity and L represents a linker molecule linking M and S to their pharmaceutically acceptable salts and solvates processes and intermediates for their preparation and to their use in the treatment of inflammatory diseases and conditions in humans and animals.
US Published Application 20040077612 herein incorporated by reference in its entirety relates to new compounds represented by Formula IV.
wherein M represents a macrolide subunit (macrolide moiety) derived from macrolide possessing the property of accumulation in inflammatory cells, V represents an anti-inflammatory steroid or non steroid subunit or an anti neoplastic or antiviral subunit and L represents a linking group covalently linking M and V to their pharmaceutically acceptable salts and solvates processes and intermediates for their preparation and to their use in the treatment of inflammatory diseases and conditions in humans and animals.
US Published Application 2004 0097434 and International Publication No. WO 04/005309, each of which are herein incorporated by reference in their entirety relates to new compounds represented by formula V.
wherein M represents a macrolide subunit (macrolide moiety) derived from macrolide possessing the property of accumulation in inflammatory cells, D represents a nonsteroidal subunit (nonsteroidal moiety) derived from a nonsteroid drug with anti-inflammatory, analgesic and/or antipyretic activity (NSAID) and L represents a linking group covalent linking M and D to their pharmaceutically acceptable salts and solvates processes and intermediates for their preparation and to their use in the treatment of inflammatory diseases and conditions in humans and animals.
US Published Application 20050080003, herein incorporated by reference in its entirety, describes yet further conjugate compounds having a steroid or non-steroidal anti-inflammatory subunit D linked via the chain L to position N/9a of an aglycone type macrolide subunit.
US Published Application 20040087517 and International Publication WO2003/070174 disclose a conjugate of (i) a “transportophore” and (ii) a “non-antibiotic therapeutic agent” covalently linked by a bond or a linker incorporating the transportophore. The transportophore and conjugate must have an immune selectivity ratio of at least 2. “Transportophore” is broadly defined as a compound, a portion of which resembles and is recognized as a substrate for transport protein(s).
However, there is still need for novel anti-inflammatory conjugates of macrolides and steroids having therapeutic action.
The present invention relates to: a) new compounds represented by the structure I:
wherein M represents a macrolide subunit derived from macrolides, possessing the property of accumulation in inflammatory cells, Z represents either a steroid subunit or nonsteroidal subunit derived from nonsteroidal anti-inflammatory drugs (NSAID), and L represents a chain linking M and Z; b) their pharmacologically acceptable salts and solvates; c) processes and intermediates for their preparation and d) their activity and use in the treatment of inflammatory diseases and conditions in humans and animals. Specifically. the macrolide subunit is an 9-deoxo-9-dihydro-9a-aza-9a-homoerithronolide A or an azithromycin aglycone subunit and the linkage to Z is effected via the linker L through the hydroxy group at position C/11 or through the nitrogen at position 9a of the aglycone ring. Also, specifically the macrolide subunit is an 9-deoxo-9-dihydro-9a-aza-9a-homoerithronolide A or an azithromycin aglycone subunit and Z is steroid subunit and the linkage to M is effected via the linker L through the 17α-hydroxy group
A characteristic of compounds represented by Formula I is selective accumulation in target organs and cells in the above mentioned inflammatory diseases and conditions. These pharmacokinetic properties enable the compounds represented by Formula I to act at the inflammation site in inflammation cells by inhibiting the production of inflammation mediators. In such a manner, the unfavourable systemic side-effects of corticosteroids or non-steroidal anti-inflammatory molecules are avoided and the therapeutic action of either the steroid or the NSAID moiety is targeted to the area where it is most needed. Following local or systemic application molecules rapidly accumulate in inflammation cells wherein they act by inhibiting the production of cytokines and chemokines and/or other inflammatory mediators thus suppressing the inflammation.
According to the known and established state of the art, compounds represented by Formula I, which are the object of the present invention, their pharmacologically acceptable salts, pharmaceutical compositions comprising them, and processes for making them have hitherto not been described. None of the compounds which are the object of the present invention has been described either as anti-inflammatory substance or as an inhibitor of eosinophilic accumulation in inflammation tissues.
In one aspect, the present invention relates to:
a) compounds represented by Formula I:
wherein M represents a macrolide subunit with substructure VIII:
wherein
R1, R2, R3, R4 and R5 are, independently of each other, hydrogen or groups such as C1-C4 alkyl (preferably methyl), alkanoyl (preferably acetyl), alkoxycarbonyl (preferably methoxycarbonyl or tert-butoxycarbonyl), arylmethoxycarbonyl (preferably benzyloxycarbonyl), aroyl (preferably benzoyl), arylalkyl (preferably benzyl), alkylsilyl (preferably trimethylsilyl), alkylsilylalkoxyalkyl (preferably trimethylsilylethoxymethyl) or a covalent bond with X1 of chain L of formula IX;
In another aspect R1, R2, R3, R4 and R5 are independently chosen from the group consisting of C1-C4 alkyl and hydrogen.
In another aspect R1, R2, R3, R4 and R5 are independently chosen from the group consisting of methyl and hydrogen.
In another aspect R1, R2, R3, R4 and R5 are hydrogen.
In another aspect R4 is group that can combine with R5 to form a “bridge” (e.g. a cyclic carbonate or carbamate) or R4 is a group that can combine with >NRN to form a “bridge” (e.g. a cyclic carbamate).
In another aspect R4 represents a covalent bond with X1 of chain L of formula IX;
RN represents hydrogen, C1-C4 alkyl group or the covalent bond with X1 of chain L of formula IX;
L represents a linker chain
Preferably L represents a linker chain with substructure IX or XIII:
—X1—(CH2)m-Q-(CH2)n—X2— IX
—X1—(CH2)m—V—(CH2)p-Q-(CH2)n—X2— XIII
wherein
X1 is selected from: —CH2—, —CH2—NH—, —C(O)—, —OC(O)—, ═N—O—, —C(O)NH— or —OC(O)NH—;
X2 is selected from: —NH—, —CH2—, —NHC(O)—, —C(═O), —OC(O)—, —C(═O)O—, or —C(O)NH—;
Q is —NH— or —CH2—;
This definition of the linking group is preferred not only for conjugates of nonsteroids and macrolides of Formula VIII but for any conjugate within Formula I. Other linking groups can be used as long as they provide the necessary spacer and can serve to link one subunit of the Formula I with the other, as is well-known in the art. For example at U.S. Pat. No. 6,297,260, which is incorporated by reference in its entirety, at claim 1 and the specific list of NSAIDs contained therein.
Z represents a nonsteroidal subunit derived from nonsteroidal anti-inflammatory drugs (NSAID) or a steroid subunit preferably a steroid of substructure X:
wherein
Ra, Rb, independently, are hydrogen, methyl or halogen;
Rf is hydrogen, hydroxyl group or halogen (preferably chlorine) or forms a C═O (carbonyl) group with the carbon atom to which it is linked;
RcC is hydroxy; C1-C4 alkyl (preferably methyl); C1-C4 alkoxy (preferably methoxy); C1-C4alkylhydroxy (preferably CH2OH); NH—C1-C4 alkyl (preferably NHCH3); CH2OC(O)C1-C4alkyl (preferably CH2OC(O)CH3); XC(O)N(R1R2) wherein X is S or O, R1 and R2 are independently C1-C6 alkyl or R1 and R2 together are C1-C6 alkylene; or RcC is SCH2Y or CH2Y wherein Y is halogen (preferably chlorine or fluorine) or Rc is the covalent link with X2 of chain L provided that chain L is linked to R4 of macrolide subunit of formula VIII;
Rd is the covalent link with X2 of chain L, hydrogen, hydroxy, methyl or C1-C4 alkoxy (preferably methoxy or n-propoxy) or together with Re and the pertaining C-atoms represent 1,3-dioxolane ring which can be additionally alkyl or alkenyl mono or di-substituted (preferably 2,2-dimethyl or 2-monopropyl or trans-propenyl ring);
Re is hydrogen, hydroxy, methyl or C1-C4 alkoxy (preferably methoxy or n-propoxy) or together with the Rd and pertaining C-atoms represent 1,3-dioxolane ring which can be additionally alkyl or alkenyl mono or di-substituted (preferably 2,2-dimethyl or 2-monopropyl or trans-propenyl ring);
In another aspect Rd is preferably. the covalent link with X2 of chain L;
Rj is hydrogen or halogen (preferably chlorine).
In another aspect the present invention relates to compounds of Formula X chosen from the group consisting of
In another aspect, the present invention relates to processes for preparation of the foregoing compounds and to intermediates which may be used in such preparation.
In a third aspect, the present invention relates to combinations of one or more of the foregoing compounds in quantities sufficient for suppression of inflammatory processes; (e.g. two or more NSAID conjugates of the invention, two or more steroid conjugates of the invention, two or more compounds of the invention with at least one being an NSAID conjugate of the invention and at least one being a steroid conjugate of the invention.) These combinations offer more pronounced antiinflammatory activity if needed to treat inflammatory disease and conditions.
In yet an additional aspect, the present invention directed to methods for the use of the foregoing compounds in the treatment of disorders and conditions caused by inflammatory processes or to uses of the present compound in the treatment of the foregoing disorders or in the manufacture of medicaments for such treatment.
In yet another aspect of the invention pharmaceutical compositions comprising a compound of the invention and pharmaceutically acceptable salts or solvates thereof including pharmaceutically acceptable diluent or carrier are contemplated. Examples include but are not limited to carboxymethylcellulose and salts thereof, polyacrylic acid and salts thereof, carboxyvinyl polymers and salts thereof, alginic acid and salts thereof, propylene glycol alginate, chitosan, hydroxypropylcellulose, hydroxypropylmethylcellulose, hydroxyethylcellulose, ethylcellulose, methylcellulose, polyvinyl alcohol, polyvinyl pyrolidone, N-vinylacetamide polymer, polyvinyl methacrylate, polyethylene glycol, pluronic, gelatin, methyl vinyl ether-maleic anhydride copolymer, starch, soluble starch croscaremlose, pullulan and a copolymer of methyl acrylate and 2-ethylhexyl acrylate lecithin, lecithin derivative, propylene glycol fatty acid esters, glycerin fatty acid esters, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyethylene glycol fatty acid esters polyoxyethylene hydrated caster oil, polyoxyethylene alkyl ethers, and pluronic. Appropriate buffer system if diluent is used is in pH range of 4 to 8, together with low molecular weight alcohols like thanol and isopropanol. The use of preservatives and masking agents is suitable.
In yet another aspect of the invention is a method of treatment of inflamatory diseases, disorders, and conditions characterized by or associated with an undesirable inflammatory immune response and all diseases and conditions induced by or associated with an excessive secretion of TNF-α and IL-1 which comprises administering to a subject a therapeutically effective amount of a compound of the invention.
In yet another aspect of the invention is a method of treating inflammatory conditions and immune or anaphylactic disorders associated with infiltration of leukocytes into inflamed tissues in a subject in need thereof which comprises administering to said subject a therapeutically effective amount of a compound of the invention.
In yet another aspect of the invention inflammatory conditions and immune disorders to be treated by the compounds of the invention are chosen from the group consisting of asthma, adult respiratory distress syndrome, bronchitis, cystic fibrosis, rheumatoid arthritis, rheumatoid spondylitis, osteoarthritis, gouty arthritis, uveitis, conjunctivitis, inflammatory bowel conditions, Crohn's disease, ulcerative colitis, distal proctitis, psoriasis, eczema, dermatitis, coronary infarct damage, chronic inflammation, endotoxin shock, and smooth muscle proliferation disorders.
In yet another aspect of the invention inflammatory conditions and immune disorders to be treated by the compounds of the invention are chosen from the group consisting of asthma, adult respiratory distress syndrome, chronic obstructive pulmonary disorder (COPD) inflammatory bowel conditions, Crohn's disease, bronchitis, and cystic fibrosis.
In yet another aspect of the invention is a method of treatment of inflammatory diseases, disorders and conditions characterized by or associated by excessive unregulated production of cytokines or inflamatory mediators which comprises administering to a subject a therapeutically effective amount of a compound of the invention.
Symbols M, L and Z represent three different subunits of compounds of Formula I. The symbol M represents the macrolide subunit, and the symbol Z represents the steroid or nonsteroidal subunit linked through the chain L with the macrolide subunit M.
In Formula I, Z can represent a nonsteroidal anti-inflammatory subunit, i.e., a moiety of a nonsteroidal antiinflammatory drug (NSAID). Suitable NSAIDs include, but are not limited to, those which inhibit cyclooxygenase, the enzyme responsible for the biosyntheses of the prostaglandins and certain autocoid inhibitors, including inhibitors of the various isoenzymes of cyclooxygenase (including, but not limited to, cyclooxygenase-1 and -2), and as inhibitors of both cyclooxygenase and lipoxygenase relates to nonsteroidal anti-inflammatory drug (NSAID), such as the commercially available NSAIDs aceclofenac, acemetacin, acetaminophen, acetaminosalol, acetyl-salicylic acid, acetyl-salicylic-2-amino-4-picoline-acid, 5-aminoacetylsalicylic acid, alclofenac, aminoprofen, amfenac, ampyrone, ampiroxicam, anileridine, bendazac, benoxaprofen, bermoprofen, α-bisabolol, bromfenac, 5-bromosalicylic acid acetate, bromosaligenin, bucloxic acid, butibufen, carprofen, celecoxib, chromoglycate, cinmetacin, clindanac, clopirac, sodium diclofenac, diflunisal, ditazol, droxicam, enfenamic acid, etodolac, etofenamate, felbinac, fenbufen, fenclozic acid, fendosal, fenoprofen, fentiazac, fepradinol, flufenac, flufenamic acid, flunixin, flunoxaprofen, flurbiprofen, glutametacin, glycol salicylate, ibufenac, ibuprofen, ibuproxam, indomethacin, indoprofen, isofezolac, isoxepac, isoxicam, ketoprofen, ketorolac, lomoxicam, loxoprofen, meclofenamic acid, mefenamic acid, meloxicam, mesalamine, metiazinic acid, mofezolac, montelukast, mycophenolic acid, nabumetone, naproxen, niflumic acid, nimesulide, olsalazine, oxaceprol, oxaprozin, oxyphenbutazone, paracetamol, parsalmide, perisoxal, phenyl-acethyl-salicylate, phenylbutazone, phenylsalicylate, pyrazolac, piroxicam, pirprofen, pranoprofen, protizinic acid, reserveratol, salacetamide, salicylamide, salicylamide-O-acetyl acid, salicylsulphuric acid, salicin, salicylamide, salsalate, sulindac, suprofen, suxibutazone, tamoxifen, tenoxicam, theophylline, tiaprofenic acid, tiaramide, ticlopridine, tinoridine, tolfenamic acid, tolmetin, tropesin, xenbucin, ximoprofen, zaltoprofen, zomepirac, tomoxiprol, zafirlukast and cyclosporine. Additional NSAID genera and particular NSAID compounds are disclosed in U.S. Pat. No. 6,297,260, incorporated entirely by reference (especially in the generic formulas of its claim 1 and the recitation of specific list of NSAID's contained therein and in claim 3, and thiazulidene NSAIDs disclosed in International Patent Application WO 01/87890, incorporated herein by reference in its entirety. Preferred are flufenamic acid, flunixin and celecoxib. In certain embodiments, the NSAID subunit is neither acetyl salicylic acid nor mycophenolic acid.
In formula I, Z may also represent a steroid subunit including, but not limited to, corticosteroids (such as glucocorticoids and mineralocorticoids) and androgens. Non-limiting examples of corticosteroids include cortisol, cortisone, clobetasol, hydrocortisone, fludrocortisone, fludroxycortide, flumetasone, flunisolide, fluocinolone, fluocinonide, fluocortolone, fluorometholone, prednisone, prednisolone, 6-alpha-methylprednisolone, triamcinolone, alclometasone, beclometasone, betamethasone, budesonide, dexamrethasone, amcinonide, cortivazol, desonide, desoximethasone diflucortolone, difluprednate, fluclorolone and dichlorisone, fluperinidene, fluticasone, halcinonide, meprednisone, methylprednisolone, paramethasone, prednazoline, prednylidene, tixocortol, triamcinolone, and acid derivatives thereof, e.g., acetate, propionate, dipropionate, valerate, phosphate, isonicotinate, metasulfobenzoate, tebutate, and hemisuccinate).
Unless stated otherwise, the following terms have the meanings ascribed to them below.
“Halogen” means a halogen atom which may preferably be: fluorine, chlorine or bromine (the most preferably fluorine or chlorine).
“Alkyl” means a linear or branched saturated monovalent hydrocarbon radical of one to ten carbon atoms, more preferably one to six carbon atoms The preferred straight-chain or branched-chain alkyls include methyl, ethyl, propyl, iso-propyl, butyl, sec-butyl and tert-butyl. C1-C4 alkyl is preferred. Methyl is most preferred. Alkyl groups may be substituted with one up to five substituents including halogen (preferably fluorine or chlorine), hydroxy, alkoxy (preferably methoxy or ethoxy), acyl, acylamino cyano, amino, N—(C1-C4)alkylamino (preferably N-methylamino or N-ethylamino), N,N-di(C1-C4-alkyl)amino (preferably dimethylamino or diethylamino), aryl (preferably phenyl) or heteroaryl, thiocarbonylamino, acyloxy, amino, amidino, alkylamidino, thioamidino, aminoacyl, aminocarbonylamino, aminothiocarbonylamino, aminocarbonyloxy, aryl, heteroaryl, aryloxy, aryloxyaryl, nitro, carboxyl, carboxylalkyl, carboxyl-substituted alkyl, carboxyl-cycloalkyl, carboxyl-substituted cycloalkyl, carboxylaryl, carboxyl-substituted aryl, carboxylheteroaryl, carboxyl-substituted heteroaryl, carboxylheterocyclic, carboxyl-substituted heterocyclic, cycloalkyl, cycloalkoxy, heteroaryloxy, heterocyclyloxy, and oxycarbonylamino. Such substituted alkyl groups are within the present definition of “alkyl.” The present definition of alkyl carries over to other groups having an alkyl moiety such as alkoxy or alkanoyl.
“Alkenyl” means a linear or branched monovalent hydrocarbon radical of two to ten and preferably two to six carbon atoms which has at least one double carbon-carbon bond. Alkenyl groups may be substituted with the same groups as alkyl and such optionally substituted alkenyl groups are encompassed within the term “alkenyl”. Ethenyl, propenyl, butenyl and cyclohexenyl are preferred.
“Alkynyl” means a linear or branched monovalent hydrocarbon radical, having a straight-chain or a branched-chain of two to ten, and preferably two to six carbon atoms and containing at least one and preferably no more than three triple carbon-carbon bonds. Alkynyl groups can be substituted with the same groups as alkyl, and the substituted groups are within the present definition of alkynyl. Ethynyl, propynyl and butynyl groups are preferred.
“Cycloalkyl” means a cyclic group having 3-8 carbon atoms having a single ring optionally fused to an aryl or heteroaryl group. The cycloalkyl groups can be substituted as specified for “aryl” below, and the substituted cycloalkyl groups are within the present definition of “cycloalkyl”. Preferred cycloalkyls are cyclopentyl and cyclohexyl.
“Aryl” means an unsaturated aromatic carbocyclic group having 6-14 carbon atoms having a single ring such as phenyl or multiple fused rings such as naphthyl. Aryl may optionally be further fused to an aliphatic or aryl group or can be substituted with one or more substituents such as halogen (fluorine, chlorine and/or bromine), hydroxy, C1-C7 alkyl, C1-C7 alkoxy or aryloxy, C1-C7 alkylthio or arylthio, alkylsulfonyl, cyano or primary or nonprimary amino.
“Heteroaryl” means a monocyclic or a bicyclic aromatic hydrocarbon ring having from 2 to 10 carbon atoms and from 1 to 4 heteroatoms, such as O, S or N. The heteroaryl ring may optionally be fused to another heteroaryl, aryl or aliphatic cyclic group. Examples of this type are furan, thiophene, imidazole, indole, pyridine, oxazole, thiazole, pyrrole, pyrazole, tetrazole, pyrimidine, pyrazine and triazine, with furan, pyrrole, pyridine and indole being preferred. The term includes groups that are substituted with the same substituents as specified for aryl above.
“Heterocyclic” means a saturated or unsaturated group having a single or multiple rings and from 1 to 10 carbon atoms and from 1-4 heteroatoms selected from nitrogen, sulfur or oxygen, wherein in a fused ring system the other ring or rings can be aryl or heteroaryl. Heterocyclic groups can be substituted as specified for alkyl groups and the thus substituted heterocyclic groups are within the present definition.
When Rc represents a covalent bond, the nonsteroidal or steroid subunit Z is linked via Rc with the chain L to the R4 of macrolide subunit M.
When Rd represents a covalent bond, the nonsteroidal or steroid subunit Z is linked via Rd with the chain L to the macrolide subunit M.
When RN represents a covalent bond, the macrolide subunit M is linked via RN with the chain L to the nonsteroidal or steroid subunit Z.
When R4 represents a covalent bond, the macrolide subunit M is linked via R4 with the chain L to the nonsteroidal or steroid subunit Z.
In the preparation of the compounds represented by Formula I of the specified pharmacological activity, in the present invention certain new compounds were prepared as intermediates in the preparation of pharmacologically active compounds. The present invention also relates to such intermediates.
The term “salts” can include acid addition salts or addition salts of free bases. Examples of acids which may be employed to form pharmaceutically acceptable acid addition salts include but are not limited to salts derived from nontoxic inorganic acids such as nitric, phosphoric, sulfuric, or hydrobromic, hydroiodic, hydrofluoric, phosphorous, as well as salts derived from nontoxic organic acids such as aliphatic mono- and dicarboxylic acids, phenyl-substituted alkanoic acids, hydroxyl alkanoic acids, alkanedioic acids, aromatic acids, aliphatic and aromatic sulfonic acids, and acetic, maleic, succinic, or citric acids. Non-limiting examples of such salts include napadisylate, besylate, sulfate, pyrosulfate, bisulfate, sulfite, bisulfite, nitrate, phosphate, monohydrogenphosphate, dihydrogenphosphate, metaphosphate, pyrophosphate, chloride, bromide, iodide, acetate, trifluoroacetate, propionate, caprylate, isobutyrate, oxalate, malonate, succinate, suberate, sebacate, fumarate, maleate, mandelate, benzoate, chlorobenzoate, methylbenzoate, dinitrobenzoate, phthalate, benzenesulfonate, toluenesulfonate, phenylacetate, citrate, lactate, maleate, tartrate, methanesulfonate, and the like. Also contemplated are salts of amino acids such as arginate and the like and gluconate, galacturonate (see, for example, Berge S. M. et al. “Pharmaceutical Salts,” J. of Pharma. Sci., 1977; 66:1).
The acid addition salts of said basic compounds are prepared by contacting the free base form with a sufficient amount of the desired acid to produce the salt in the conventional manner. The free base form may be regenerated by contacting the salt form with a base and isolating the free base in the conventional manner. The free base forms differ from their respective salt forms somewhat in certain physical properties such as solubility in polar solvents, but otherwise the salts are equivalent to their respective free base for purposes of the present invention.
Pharmaceutically acceptable base addition salts are formed with metals or amines, such as alkali and alkaline earth metals or organic amines. Examples of metals used as cations are sodium, potassium, magnesium, calcium, and the like. Examples of suitable amines are N,N′-dibenzylethylenediamine, chloroprocaine, choline, diethanolamine, dicyclohexylamine, ethylenediamine, N-methylglucamine, and procaine.
The base addition salts of said acidic compounds are prepared by contacting the free acid form with a sufficient amount of the desired base to produce the salt in the conventional manner. The free acid form may be regenerated by contacting the salt form with an acid and isolating the free acid in the conventional manner.
The phrase “pharmaceutically acceptable”, as used in connection with compositions of the invention, refers to molecular entities and other ingredients of such compositions that are physiologically tolerable and do not typically produce untoward reactions when administered to a mammal (e.g., human). Preferably, as used herein, the term “pharmaceutically acceptable” means approved by a regulatory agency of the Federal or a state government or listed in the U.S. Pharmacopeia or other generally recognized pharmacopeia for use in mammals, and more particularly in humans.
The term “carrier” applied to pharmaceutical compositions of the invention refers to a diluent, excipient, or vehicle with which an active compound is administered. Such pharmaceutical carriers can be sterile liquids, such as water, saline solutions, aqueous dextrose solutions, aqueous glycerol solutions, and oils, including those of petroleum, animal, vegetable or synthetic origin, such as peanut oil, soybean oil, mineral oil, sesame oil and the like. However, since memantine is highly soluble, aqueous solutions are preferred. Suitable pharmaceutical carriers are described in “Remington's Pharmaceutical Sciences” by E.W. Martin, 18th Edition. Particularly preferred for the present invention are carriers suitable for immediate-release, i.e., release of most or all of the active ingredient over a short period of time, such as 60 minutes or less, and make rapid absorption of the drug possible.
The present invention also encompasses solvates (preferably hydrates) formed by the compounds represented by Formula I or their salts.
The present invention also relates to all possible tautomeric forms which can be formed by individual compounds of Formula I.
The present invention also encompasses prodrugs of Formula I compounds, i.e., compounds which release an active parent drug according to Formula (I) in vivo when administered to a mammalian subject. Prodrugs of a compound of Formula I are prepared by modifying functional groups present in the compound of Formula I in such a way that the modifications may be cleaved in vivo to release the parent compound. Prodrugs include compounds of Formula I wherein a hydroxy, amino, or carboxy group of a Formula I compound is bonded to any group that may be cleaved in vivo to regenerate the free hydroxyl, amino or carboxy group, respectively. Examples of prodrugs include, but are not limited to esters (e.g., acetate, formate, and benzoate derivatives) of compounds of Formula I. The compounds of Formula I have one or more chirality centers and, depending on the nature of individual substituents, they can also have geometrical isomers. Isomers that differ in the arrangement of their atoms in space are termed “stereoisomers”. Stereoisomers that are not mirror images of one another are termed “diastereomers” and those that are non-superimposable mirror images of each other are termed “enantiomers”. When a compound has a chiral center, a pair of enantiomers is possible. An enantiomer can be characterized by the absolute configuration of its asymmetric center and is described by the R- and S-sequencing rules of Cahn and Prelog, or by the manner in which the molecule rotates the plane of polarized light and designated as dextrorotatory or levorotatory (i.e., as (+) or (−)-isomer respectively). A chiral compound can exist as either an individual enantiomer or as a mixture of enantiomers. A mixture containing equal proportions of the enantiomers is called a “racemic mixture”. The present invention encompasses all individual isomers of compounds of Formula I. The description or naming of a particular compound in the specification and claims is intended to include both individual enantiomers and mixtures, racemic or otherwise, thereof. Methods for the determination of stereochemistry and the separation of stereoisomers are well-known in the art.
A “pharmaceutically acceptable excipient” means an excipient that is useful in preparing a pharmaceutical composition that is generally safe, non-toxic and neither biologically nor otherwise undesirable, and includes an excipient that is acceptable for veterinary use as well as human pharmaceutical use. A “pharmaceutically acceptable excipient” as used in the present application includes both one and more than one such excipient.
“Treating” or “treatment” of a state, disorder or condition includes:
(1) preventing or delaying the appearance of clinical symptoms of the state, disorder or condition developing in a mammal that may be afflicted with or predisposed to the state, disorder or condition but does not yet experience or display clinical or subclinical symptoms of the state, disorder or condition,
(2) inhibiting the state, disorder or condition, i.e., arresting or reducing the development of the disease or at least one clinical or subclinical symptom thereof, or
(3) relieving the disease, i.e., causing regression of the state, disorder or condition or at least one of its clinical or subclinical symptoms.
The benefit to a subject to be treated is either statically significant or at least perceptible to the patient or to the physician
A “therapeutically effective amount” means the amount of a compound that, when administered to a mammal for treating a state, disorder or condition, is sufficient to effect such treatment. The “therapeutically effective amount” will vary depending on the compound, the disease and its severity and the age, weight, physical condition and responsiveness of the mammal to be treated.
The four classic symptoms of acute inflammation are redness, elevated temperature. Swelling, and pain in the affected area, and loss of function of the affected organ. Symptoms and signs of inflammation associated with specific conditions include:
Subclinical symptoms include without limitation diagnostic markers for inflammation the appearance of which may precede the manifestation of clinical symptoms. One class of subclinical symptoms is immunological symptoms, such as the invasion or accumulation in an organ or tissue of proinflammatory lymphoid cells or the presence locally or peripherally of activated pro-inflammatory lymphoid cells recognizing a pathogen or an antigen specific to the organ or tissue. Activation of lymphoid cells can be measured by techniques knowvn in the art.
“Delivering” a therapeutically effective amount of an active ingredient to a particular location within a host means causing a therapeutically effective blood concentration of the active ingredient at the particular location. This can be accomplished, e.g., by local or by systemic administration of the active ingredient to the host.
The term host or subject in need thereof as used herein refers to a mammal preferably a human.
The term leaving group refers to a chemical group which is capable of being displaced by a nucleophile. Examples of such groups include but are not limited to halogen, mesylate, tosylate and ester groups.
A further aspect of the present invention relates to a method for the preparation of compounds within Formula I comprising:
Steroid or nonsteroidal subunits of the substructure XI are either commercially available products or have been obtained, like the starting macrolide subunits of the substructure XII by methods for preparation of analogous compounds described in our earlier patent applications (HR Patent Application No. 20010018; WO Patent Application No. 02/055531); WO 04/005309; WO 04/005310 herein incorporated by reference in their entireties.
The reaction is generally performed with acid derivatives which have the ability to activate the carboxylic acid group of steroidal anti-inflammatory subunit, such as halogenides, mixed anhydrides and especially carbodiimides (such as -(3-dimethylaminopropyl)-3-ethyl-carbodiimide (EDC)) and benzotriazoles. The reaction proceeds in the presence of a base, such as an organic base (e.g., triethylamine), at room temperature under an inert atmosphere such as nitrogen or argon. The reaction may require several hours to several days to come to completion.
The steroid subunit may be linked to the macrolide through the 21 hydroxy group in steroids that have such a group. Beginning with a 21-hydroxy steroid cyclic ketal is reacted with an appropriate carboxylic acid halide or an anhydride, preferably in a solvent such as methylene chloride in the presence of a tertiary amine base or pyridine at a reduced temperature (−50° C.-100° C.). The intermediate so produced is reacted with H2N-L-M to form compounds of Formula I
The steroid subunit may also be linked to the macrolide through the 17 position on the steroid subunit. One method for preparing such a compound is as follows:
As illustrated by the synthetic schemes above and below there are two synthetic pathway alternatives: one derivatives the carboxylic acid group at C17 to form C(O)—Rc prior to coupling with the linker-macrolide partion, and the other derivatives the same carboxylic group only subsequent to such coupling.
For example, when L is —K—NH— (wherein K is the portion of the L molecule attached to the macrolide) the compound of Formula I can be formed by derivatizing an NH group on the macrolide ring to a terminal —N—K—NH2 group and reacting the derivatized macrolide with a steroid anti-inflammatory subunit represented by Formula Sa:
Compounds represented by Formula I, where X2 is —NH—, can be prepared by reacting a macrolide subunit and a steroid subunit having a —C═C— bond as shown below.
The carboxylic acid group at the 17 position of the starting steroid subunit may be modified prior to the reaction with NH2-L-M.
The carboxylic acid group at the 17 position of the starting steroid subunit can also be protected prior to the reaction with NH2-L-M and deprotected after the reaction with NH2-L-M or the esterification step.
The non-steroidal anti-inflammatory subunit D may contain a —C(O)L1 group (such as a free carboxylic acid group) or be derivatized by methods known in the art.
According to Scheme 1, NSAID compounds having a hydroxyl group may alternatively be derivatized by the action of succinic anhydride in the presence of pyridine followed by reaction of the intermediate so produced with triethylamine, 4-pyrrolopyridine in methylene chloride to produce NSAID having free carboxylic acid group (Huang C. M. et al. Chem. & Biol. 2000, 7, 453-461, Hess S. et al. Bioorg. & Med. Chem. 2001, 9, 1279-1291) The NSAID derivatives so produced may be coupled to a linker macrolide compound such as formula VIa.
According to Scheme II, NSAHD compounds having an amino group may alternatively be derivatized by the action of sodium hydride and tert-butyliodoacetate in N,N-dimethylformamide to produce a (butoxy carbonyl derivative of the NSAID which is then reacted with (trifluoracetic acid in methylene chloride to produce NSAID having free carboxylic acid group (Hess S. et al. Bioorg. & Med. Chem. 2001, 9, 1279-1291). The NSAID derivatives so produced may be coupled to a linker macrolide compound such as formula VIa.
Alternatively by NSAID compounds having an amino group may be derivatized according to Scheme III by the action of succinic anhydride in the presence of dimethylaminopyridine, N,N′-diisopropylethylamine in dimethylformamide to produce NSAID having free carboxylic acid group (Pandori M. W. et al. Chem. & Biol. 2002, 9, 567-573). The NSAID derivatives so produced may be coupled to a linker macrolide compound such as formula VIa.
Compounds of Formula I can generally be obtained so that: one end of the chain L, is first linked to the macrolide subunit M, and then the other end of the chain is linked to the nonsteroidal or steroid subunit D; or one a of the chain L is first linked to the nonsteroidal or steroid subunit D and then the other end of the chain is linked to the macrolide subunit M, and, finally, one end of the yet unformed chain is linked to the macrolide subunit M, and the other end of the also unformed chain is linked to the nonsteroidal or steroid subunit D, and subsequently the ends are chemically linked to form the chain L.
To prevent undesirable side-reactions, it is frequently necessary to protect certain groups such as e.g. a hydroxy or amino group. A comprehensive discussion of the ways in which such groups may be protected and methods for cleaving the resulting protected derivatives is given by for example T. W. Greene and P. G. M Wuts in Protective Groups in Organic Synthesis 2nd ed., John Wiley & Son, Inc 1991 and by P. J. Kocienski in Protecting Groups, Georg Thieme Verlag 1994 which are incorporated herein by reference. Examples of suitable amino protecting groups include acyl type protecting groups (e.g. formyl, trifluoroacetyl and acetyl), aromatic urethane type protecting groups (e.g. benzyloxycarbonyl (Cbz) and substituted Cbz, and 9-fluorenylmethoxycarbonyl (Fmoc)), aliphatic urethane protecting groups (e.g. t-butyloxycarbonyl (Boc), isopropyloxycarbonyl and cyclohexyloxycarbonyl) and alkyl type protecting groups (e.g. benzyl, trityl and chlorotrityl). Examples of suitable oxygen protecting groups may include for example alkyl silyl groups, such as trimethylsilyl or tert-butyldimethylsilyl; alkyl ethers such as tetrahydropyranyl or tert-butyl; or esters such as acetate. Hydroxy groups may be protected by reaction of for example acetic anhydride, benzoic anhydride or a trialkylsilyl chloride in an aprotic solvent. Examples of aprotic solvents are dichloromethane, N,N-dimethylformamide, dimethylsulfoxide, tetrahydrofuran and the like.
For example, one possibility for the protection of the amino group is t-butyloxycarbonyl (Boc). Deprotection using trifluoroacetic acid (TFA) is described in the examples. Corresponding protection for amino and alkylamino groups are groups such as alkanoyl (acetyl), alkoxycarbonyl (methoxycarbonyl, etoxycarbonyl or tert-butoxycarbonyl), arylmethoxycarbonyl (benzyloxycarbonyl), aroyl (benzoyl) and alkylsilyl group (trimethylsilyl or trimethylsilyletoxymethyl). The conditions for elimination of the protective group depend on the selection and properties of that group. Thus, for example, acyl groups such as alkanoyl, alkoxycarbonyl and aroyl group can be removed by hydrolysis in the presence of a base (sodium or potassium hydroxide), tert-butoxycarbonyl or alkylsilyl (trimethylsilyl) group can be removed with a corresponding acid (for example, hydrochloric, sulphuric, phosphoric or trifluoroacetic acid), while arylmethoxycarbonyl group (benzyloxycarbonyl) can be removed by hydrogenolysis in the presence of a catalyst such as palladium-on-charcoal.
A further aspect of the present invention relates to the methods for using the compounds of Formula I as anti-inflammatory, anti-anaphylactic and immunomodulating agents which can be administered in different ways, depending on the inflammation site, e.g. percutaneously, orally, buccally, rectally, parenterally or by inhalation when application within the respiratory tract is intended.
A further aspect of the present invention relates to the methods for using the compounds of Formula I as anti-inflammatory, anti-anaphylactic and immunomodulating agents which can be administered in different ways, depending on the inflammation site. Further, the present invention relates to pharmaceutical compositions containing an effective dose of compounds of the present invention as well as pharmaceutically acceptable excipients, such as carriers or diluents.
The preparation of the pharmaceutical compositions of the invention can include mixing, granulating, tabletting and dissolving the ingredients. Chemical carriers can be in solid or liquid form. Solid carriers can be lactose, sucrose, talc, gelatine, agar, pectin, magnesium stearate, fatty acids without limitation. Liquid carriers can be syrups, oils such as olive, sunflower seed or soybean oils, water, or physiologic saline without limitation. Similarly, carriers may also contain a component for a sustained release of the active component such as glyceryl monostearate or glyceryl distearate. Several forms of pharmaceutical compositions can be prepared. If a solid carrier is used, these forms can include tablets, caplets, solid gelatinous capsules, powders or granules without limitation that can be administered orally. The amount of the solid carrier can vary but mainly it is in the range from 25 mg to 1 g. If a liquid carrier is used, the formulation can be in the form of a syrup, emulsion, soft gelatinous capsules, or sterile injectable liquids, or nonaqueous liquid suspensions topically or systemically, e.g., orally, parenterally, percutaneously, mucosally, e.g., buccally, intranasally, intrarectally and intravaginally. “Parenterally” means by intravenous, intramuscular or subcutaneous route.
The corresponding preparations of the compounds of the present invention can be used in the prophylaxis as well as in the therapeutic treatment (prevention, delay, inhibition or relief) of several disorders (diseases and other pathological inflammatory conditions) caused by or associated with an abnormal or undesirable (excessive, nonregulated, or dysregulated) inflammatory immune response involving the production of inflammatory cytokines or other inflammation mediators, including without limitation TNf-α and IL-1β. These disorders include autoimmune diseases such as rheumatoid arthritis, insulin-dependent diabetes mellitus, autoimmune thyroiditis, multiple sclerosis, uveoretinitis, lupus erythematosus, scleroderma; other arthritic conditions having an inflammatory component such as rheumatoid spondylitis, osteoarthritis, septic arthritis and polyarthritis; other inflammatory brain disorders, such as meningitis, Alzheimer's disease, AIDS dementia encephalitis, other inflammatory eye inflammations, such as retinitis; inflammatory skin disorders, such as, eczema, other dermatites (e.g., atopic, contact), psoriasis, bums induced by UV radiation (sun rays and similar UV sources); inflammatory bowel disease, such as Crohn's disease, ulcerative colitis; asthma; other allergy disorders, such as allergic rhinitis; conditions associated with acute trauma such as cerebral injury following stroke, heart tissue injury due to myocardial ischemia, lung injury such as that which occurs in adult respiratory distress syndrome; inflammation accompanying infection, such as sepsis, septic shock, toxic shock syndrome, other inflammatory conditions associated with particular organs or tissues, such as nephritis (e.g., glomerulonephritis), inflamed appendix, gout, inflamed gall bladder, congestive heart failure, Type II diabetes, lung. fibrosis, vascular disease, such as atherosclerosis and restenosis; and alloimmunity leading to transplant rejection. The compounds can also be administered by inhalation when application within the respiratory tract is intended. A further object of the present invention relates to the preparation of various pharmaceutical forms of the compounds to achieve the optimal bioavailability of the active compound of Formula I.
For percutaneous or mucosal external administration, the compound of Formula I can be prepared in a form of an ointment or cream, gel or lotion. Ointments, creams and gels can be formulated using a water or oil base with addition of an appropriate emulsifier or gelling agent Formulation of the present compounds is especially significant for respiratory inhalation, wherein the compound of Formula I is to be delivered in the form of an aerosol under pressure. It is preferred to micronize the compound of Formula I after it has been homogenised, e.g., in lactose, glucose, higher fatty acids, sodium salt of dioctylsulfosuccinic acid or, most preferably, in carboxymethyl cellulose, in order to achieve a microparticle size of 5 μm or less for the majority of particles. For the inhalation formulation, the aerosol can be mixed with a gas or a liquid propellant for dispensing the active substance. An inhaler or atomizer or nebulizer may be used. Such devices are known. See, e.g., Newman et al., Thorax, 1985, 40:61-676 Berenberg, M., J. Asthma USA, 1985, 22:87-92. A Bird nebulizer can also be used. See also U.S. Pat. Nos. 6,402,733; 6,273,086; and 6,228,346.
The compound of the structure I for inhalation is preferably formatted in the form of a dry powder with micronized particles, as described herein.
The compound can also be incorporated into a formulation for treating inflammation localized in an organ or tissue, e.g., Crohn's disease, where it can be administered orally or rectally. Formulations for oral administration can incorporate excipients enabling bioavailability of the compound at the site of inflammation. This can be achieved by different combinations of enteric and delayed release formulations. The compound of Formula I can also be used in the treatment of Crohn's disease and intestinal inflammation disease if the compound is applied in the form of a clyster, for which a suitable formulation can be used, as is well known in the field.
A therapeutically effective amount of the compound of the present invention can be determined by methods known in the art. Since the compound of the present invention is more efficiently delivered to the desired site than the corresponding anti-inflammatory steroid or NSAID drug alone, a lesser amount of the compound on a molar basis than of the steroid or NSAID anti-inflammatory drug can be administered while still achieving the same therapeutic effect. Furthermore, since administration of the compound results in fewer side effects than with the corresponding steroid or NSAID anti-inflammatory drug, the steroid or NSAID amount can be increased. Thus, the table below serves only as a guide. A threshold therapeutically effective amount of the compound, a pharmaceutically salt thereof, a solvate thereof, or a prodrug thereof is generally equal to or less than a therapeutically effective amount of the nonsteroidal anti-inflammatory drug on a molar basis. Broad and preferred effective amounts of the compound, a pharmaceutically salt thereof, a solvate thereof, or a prodrug thereof are shown in the table below.
For example, if the preferred amount range for prednisone is 1-50 mg/day, this corresponds to a range of 2.79 μmol to 139.5 μmol per day. The starting amount range for a hybrid steroid-macrolide conjugate according to the invention will be also 2.79 μmol to 139.5 μmol of conjugate per day. This dosage can be fine-tuned in light of the present specification using the ordinary skill in the art.
The efficacy of the present compounds can be assessed by any method for assessing inflammation or anti-inflammatory effect. There are many known methods for this purpose including without limitation use of contrast ultrasound in conjunction with injection of microbubbles, measurement of inflammatory cytokines (such as TNF-α, IL-1, IFN-γ) measurement of activated immune system cells (activated T cells, cytotoxic T cells specifically recognizing the inflamed or transplanted tissue) as well as by observation (reduction of oedema, reduction of erythema, reduction of pruritus or burning sensation, reduction of body temperature, improvement in function of the afflicted organ) as well as any of the methods provided below as well as any of the methods provided below.
The therapeutic effect of compounds of the present invention was determined in in vitro and in vivo experiments such as the following.
The beneficial antiinflammatory effect of the compounds of the present invention was determined in the following in vitro and in vivo experiments:
Formulations for oral administration can be so designed to enable bioavailability of the compound at the site of inflammation in the intestines. This can be achieved by different combinations of delayed release formulations. The compound of Formula I can also be used in the treatment of Crohn's disease and intestinal inflammation disease if the compound is applied in the form of an enema, for which a suitable formulation can be used.
The corresponding preparations of the compounds of the present invention can be used in the prophylaxis (including without limitation the prevention, delay or inhibition of recurrence of one or more of the clinical or subclinical symptoms discussed and defined in connection with the definitions of “treatment” above. as well as in the therapeutic treatment of several diseases and pathological inflammatory conditions including: chronic obstructive pulmonary disorder (COPD) asthma, inflammatory nasal diseases such as allergic rhinitis, nasal polyps, intestinal diseases such as Crohn's disease, colitis, intestinal inflammation, ulcerative colitis, dermatological inflammations such as eczema, psoriasis, allergic dermatitis, neurodermatitis, pruritis, conjunctivitis and rheumatoid arthritis.
The biological effect of the compounds of the present invention was determined in the following in vitro and in vivo experiments:
The gene for the alpha isoform of human glucocorticoid receptor was cloned by reverse polymerase chain reaction. The total RNA was isolated from human peripheral blood lymphocytes according to the instructions of the manufacturer (Qiagen, Milano, Italy), transcripted into cDNA with AMV reverse transcriptase (Roche, Basel, Switzerland) and the gene was multiplied by specific primers 1) 5′ATATGGATCCCTGATGGACTCCAAAGAATCATTAACTCC3′ and 2) 5′ATAT-CTCGAGGGCAGTCACTMTTGATGAAACAGAAG3′. The reaction product obtained was cloned into the XhoI/BamHI site of Bluescript KS plasmid (Stratagene, La Jolla, Calif. USA), subjected to sequencing by the dideoxy fluorescent method with M13 and M13rev primers (Microsynth, Balgach, Switzerland) and then it was cloned into the XhoI/BamHI site of pcDNA3.1 Hygro(+)plazmid (Invitrogen). 1×105 COS-1 cells were seeded onto a 12-well plate (Falcon) in DMEM medium (Life Technologies, Carlsbad, Calif. USA) with 10% FBS (Biowhitaker) and cultivated to a 70% confluence at 37° C. in an atmosphere with 5% CO2. The medium was removed and 1 μg of DNA, 7 μl of PLUS reagent and 2 μl of Lipofectamin (Life Technologies) in 500 μl of DMEM were added per well. The cells were incubated at 37° C. in an atmosphere with 5% CO2 and after 5 hours the same volume of 20% FBS/DMEM was added. After 24 hours, the medium was completely changed. 48 hours after transfection, the test compounds in different concentrations and 24 nM [3H]dexamethazone (Pharmacia, Piscataway, N.J. USA) in DMEM medium were added. The cells were incubated for 90 minutes at 37° C. in an atmosphere with 5% CO2, washed three times with PBS buffer (Sigma, St. Louis, Mo. USA) cooled to 4° C. (pH=7.4), and then lysed in Tris buffer (pH=8.0) (Sigma, St. Louis, Mo. USA) with 0.2% of SDS (Sigma, St. Louis, Mo. USA). After the to addition of UltimaGold XR (Packard BioScience, Groningen, The Netherlands) scintillation liquid, the residual radioactivity was read in a Tricarb (Packard) β-scintillation counter. Compounds 7 and 10 have affinity for the glucocorticoid receptor since in the assay they displace radioactive dexamethasone from the glucocorticoid receptor. Other compounds of the invention will demonstrate similar results when tested in this assay.
Triplicates of test steroid dilution in RPMI medium (Institute of Immunology, Zagreb) with 10% FBS were added to a 96 well plate. To solutions containing compounds at various concentrations, 20000 cells per well were added and incubated overnight at 37 CC in an atmosphere with 5% CO2. Then 1 μCi of [3H]thymidine (Pharmacia, Piscataway, N.J. USA) was added and the mixture was incubated for an additional 3 hours. The cells were harvested by applying a vacuum over GF/C filter (Packard). Onto each well, 30 μl of Microscynt O scintillation liquid (Packard) was added and the incorporated radioactivity was measured on a β-scintillation counter (Packard). The specificity of apoptosis induction by glucocorticoids was demonstrated by antagonizing the proliferation inhibition with mifepristone (Sigma, St. Louis, Mo. USA) a potent glucocorticoid receptor antagonist.
Compounds 7, 9 and 10 exhibit inhibition of T-cell hybridoma 13 proliferation in the concentrations from 1 μM to 1 nM. Other compounds of the invention will demonstrate antiproliferativeactivity where tested in this assay.
Splenocytes were isolated from the spleen of Balb/C mice sacrificed by thiopental injection (Pliva, Zagreb, Croatia). Spleens were chopped and mononuclear cells separated on Histopaque 1083 (Sigma Diagnostics, St. Louis, Mo. USA Cat. No 1083-1). Into a 96-well plate, compounds diluted in RPMI medium (Institute of Immunology, Zagreb, Croatia) were pipetted with 10% foetal bovine serum (Biowhittaker) and cells (200000 per well) in the same medium, and concanavalin-A stimulator (Sigma 2002-2003 cat. No C5275) at a final concentration of 51g/ml were added. The positive control, in place of the dilution of compounds, consisted of RPMI medium with 10% foetal bovine serum and concanavalin-A in the same concentration of. Cells were incubated for 72 hours at 37° C., 95% humidity and in an atmosphere with 5% CO2. Until determination of cytokines, the cells were frozen at −70° C.
Cytokines interleukin 4, interleukin 5 and interferon γ were determined by the specific ELISA method, according to manufacturer's recommendations (R&D).
Inhibition (as percentage) was calculated using the following formula:
% inh=(1−[concentration of cytokines in sample]/[concentration of cytokines in positive control])*100
Compound 10 inhibits the production of cytokines in concentrations from 1 μM to 1 nM.
Male Balb/C mice with a body weight of 20-25 g were randomly divided into groups, and sensitised by an i.p. injection of ovalbumin (OVA, Sigma, St. Louis, Mo. USA) on day zero and day fourteen. On the twentieth day, the mice were subjected to a challenge test by i.n. (intranasal) application of OVA (positive control or test groups) or PBS (negative control). 48 hours after i.n. application of OVA, the animals were anaesthetized and the lungs were rinsed with 1 mL of PBS. The cells were separated on Cytospin 3 cytocentrifuge (Shandon). The cells were stained in Diff-Quick (Dade) and the percentage of eosinophils was determined by differential counting of at least 100 cells.
Beclomethasone (Pliva d.d.) were used as a standard substances, with positive and negative control. The compounds were administered daily i.n. or i.p. in different doses 2 days before the challenge test and up to the completion of the test.
Corticosterone levels were determined in plasma from each animal using a kit for determination of corticosterone (R&D systems). Compound 10 (2 mg/kg intranasaly) had no effect on corticosterone levels, while beclomethasone (1 mg/kg intranasaly) used as standard significantly suppressed corticosterone levels.
Compound 10 also statistically significantly reduced (t-test, p<0.05) the number of eosinophils in the lung rinse with respect to positive control. It is anticipated that similar results will be observed for other compounds of the invention.
Test and reference substances, as well as vehicle (acetone), were administered topically to the inner and the outer surface of the right ear of each animal with an automatic pipette, in a volume of 60 μL/ear (30 μL/surface), thirty minutes before the croton oil challenge. Test substances were administered in the doses of 2 or 5 mg/ear/60 μL of acetone. Dexamethasone was administered in the dose of 1 mg/ear/60 μL of acetone. Thirty minutes later, 20% croton oil emulsion in acetone was applied topically to the inner and the outer surface of the right ear of each animal with an automatic pipette, in a volume of 60 μL/ear (30 μL/surface). Five hours after the challenge, animals were euthanized by asphyxiation in 100% CO2 atmosphere. For assessing the auricular edema, 8 mm discs were cut out of left and right auricular pinna and weighed. The degree of edema was calculated by subtracting the weight of 8 mm disc of the untreated ear from that of the treated contralateral ear. The inhibition of edema in the treated animals was presented as a percentage of that in the control rats (0%).
Dexamethasone, a reference substance, applied topically once (1 mg/ear), significantly reduced ear edema by 85.77% (p<0.05, Non-parametric ANOVA, n=8). Compound 10, a test substance, applied topically once as a single dose of 2 mg/ear reduced the ear edema by 51.58% (p>0.05 by Non-parametric ANOVA, p=0.0285 by Unpaired t-test, n=8) and applied topically once, in a dose of 5 mg/ear, significantly reduced ear edema by 85.53% (p<0.05, Non-parametric ANOVA, n=8).
In another experiment compound 17 applied topically once in a dose of 5 mg/ear, significantly reduced ear edema by 76.59% (ANOVA with Tukey-Kramer Multiple Comparisons Test, p<0.01, n=8).
In this model, local inflammation was followed by determination of newly formed granulation tissue together with determination of compound effects on plasma corticosterone concentration and thymus weight in Sprague-Dawley rats. Sprague-Dawley rats were purchased from Iffa Credo, Lyon, France and 10 weeks old male rats were used. PVA sponge material was purchased as 5 mm thick sheets (Oriolik, Croatia). The sponge sheets were cut into 14 mm disks using appropriate cork bore. The disks were pre-washed first with running tap water, followed by demineralized water and finally soaked in Pursept solution (Merz Hygiene, Germany) for 1 hour. Afterwards, they were rinsed well with demineralized water, dryed and heated at 80° C. for 2 hours and stored under sterile conditions. All substances were dissolved in ethanol, applied onto sterile sponges and allowed to dry in the laminar flow cabinet prior to the sponge implantation. Compound 10 was administered in a single dose of 10 mg/0.3 mL/sponge while beclomethasone dipropionate was applied at 2 or 10 mg/0.3mL/sponge.
On day 0, animals were anaesthetized by inhalation of Isoflurane (Abbott Laboratories Ltd., USA) and 5% oxygen, delivered in an anesthesia induction chamber (Stoelting Co., USA). Gas scavenging was provided using the Fluovac 240V system (International Market Supply, England). Anesthesia was maintained using a gas anesthesia mask (Stoelting Co., USA) and pedal reflex response where checked at intervals. The implantation area was shaved and subsequently disinfected using Pursept solution (MERZ Hygiene, Germany). Using strict aseptic procedure, two 1 cm long skin incisions were made just below the left and right regio scapularis. Small subcutaneous pockets were made on the left side of the left wound and the right side of the right wound using blunt forceps. In all animals, sponges with vehicle or dissolved substance applied were inserted on the left side and non-treated ones on the right side. Skin was closed with sutures and disinfected with Pursept solution. On day 7 rats were anaesthetized by intraperitoneal administration of Thiopental (PLIVA; 0.5 mL/100g body weight) and exanguinated by puncturing A. carolis com.
Blood was collected into Vacutainer tubes (Becton Dickinson, USA) for plasma corticosterone concentration analysis. Corticosterone levels in plasma were measured using R&D Systems kit for quantitative determination of corticosterone. Competitive ELISA was performed with alkaline phosphatase conjugated corticosterone as competitor. Samples were incubated for 2 hours, and after successive washing, substrate was added. After 1 h absorbance was measured on 405 mm. OD values are inversely correlated with increasing corticosterone concentrations. Corticosterone concentrations were calculated using calibration curve generated with corticosterone standard concentration dilutions. For assessing the thymus weight, thymuses were extirpated and weighed using the analytical balance. The reduction of thymus size in treated animals was presented as a percentage of that in control rats (0%).
For assessing the newly formed granulation tissue, sponges were carefully excised and each sponge perforated with sterile surgical sewing suture to keep it on the top of the Falcon tube during centrifugation. Tubes were centrifuged (1000 rpm per 10 minutes). Sponges were put into sterilizer and heated at 60° C. to dry. 24 hours later, the sponges were weighed using the analytical balance for measurement of newly formed granulation tissue. The weight of treated sponge was compared to the weight of contra-lateral non-treated sponge of the same animal. For thymus and sponge weight comparison, one-way Analyses of Variance (ANOVA) with Tukey-Kramer Multiple Comparisons Test was used. For corticosterone concentration comparison non-parametric ANOVA—Kruskal-Wallis Test with Dunn's Multiple Comparisons test was performed. Level of significance was set at p<0.05.
Seven days after sponge implantation, compound 10, administered into the sponge at single dose of 10 mg/sponge, significantly reduced granulation tissue formation, in comparison to non-treated and vehicle sponges. In comparison to vehicle beclomethasone significantly decreased thymus weight seven days after sponge implantation, at both doses: 2 and 10 mg/sponge while compound 10 administered at dose of 10 mg/sponge had no effect on thymus weight. In comparison to vehicle control beclomethasone at dose of 10 mg/sponge significantly decreased plasma corticosterone concentration while compound 10 had no significant effect on plasma corticosterone levels.
Male Balb/cJ mice (Iffa Credo, Lyon, France) weighing 25 g were randomly grouped in three groups: test, positive and negative control (10 animals per each group). Vehicle, beclomethasone dipropionate or test substance were applied intranasally (i.n.) to Balb/cJ mice. Thirty minutes later, 60 μl of bacterial lipopolysaccharide (LPS), dissolved in PBS at the concentration of 167 μg/ml, was given i.n. to all groups except the negative control group, which received the same volume of PBS. Animals were sacrificed after 24 hours and bronchoalveolar lavage fluid (BALF) collected for determination of neutrophils and 1.1-6 and TNF-α concentration. Cytokines were measured using sandwich ELISA (R&D Systems). Statistical analysis was performed using GraphPad prism software, one-way ANOVA Turkey Kramer Multiple comparison test. Beclometbasone dipropionate (2 mgfkg) non-significantly decreased all tested parameters. Compared to positive control group, compound 10 in the form of phosphate salt (4 mg/kg) statistically significantly decreased neutrophils and concentrations of TNF-α and IL-6 in BALF.
In the following examples of methods of preparation, which in no way limit the uniqueness of the invention, the synthesis of the compound of Formula I from macrolide precursors M1-M8 and steroid precursors S1-S24 and nonsteroidal precursors D10, D11 and D12 is described.
Macrolide subunits M1-M8 are compounds represented by the following general structure:
Compound M9. PS-Carbodiimide resin (1.15 mg; 1.38 mmol) was added to a dry reaction vessel. 12-(Fmoc-amino)dodecanoic acid (Fluka, Lot 440842/150903094) (2) (200 mg; 0.46 mmol) in CH2Cl2 (7.5 ml) was added to the dry resin and the mixture stirred at room temperature. After 45 minutes, compound M3 (109 mg; 0.23 mmol) in CH2Cl2 (3.5 ml) was added and the reaction stirred at 50° C. for 20 hours to afford the amide product. 1he mixture was filtered and solvent was concentrated under vacuum. Crude product was purified on silica gel column in the solvent system CH2Cl2:MeOH:NH4OH 6:1:0.1 the compound M9 (160 mg) was obtained.
LC/NIS (area %): 93.4%.
HPLC-MS: MS (ES) m/z: [MH]+ 896.66 (calcd.: 896.59)
Compound M10. Compound M9 (160 mg, 0.18 mmol) was dissolved in piperidine (1 ml) and CH2Cl2 (5 ml). The reaction mixture was stirred at room temperature for 2 hours. The solvents were evaporated and remaining traces of piperidine were removed by addition and removal under vacuum of CH2Cl2 (several portions). Crude product was purified on silica gel column in the solvent system CH2Cl2:MeOH:NH4OH 6:1:0.1 the compound M10 (132 mg) was obtained.
LC/MS (area %): 95.7%.
HPLC-MS: MS (ES) m/z: [MH]+ 674.62 (calcd.: 674.52)
IR (KBr) cm−1: 3307, 3093, 2927, 2854, 1722, 1715, 1667, 1660, 1651, 1645, 1557, 1539, 1505, 1463, 1456, 1373, 1353, 1265, 1165, 1091, 1053, 958, 811, 736.
Steroid subunits S1-S24 are compounds represented by the following general structure:
To a solution of compound S4 (500 mg, 1.38 mmol) in dry CH2Cl2 (10 ml) under argon, were added triethylamine (1.5 mL, 10.76 mmol), 1-hydroxybenzotriazole (373 mg, 2.76 mmol), NH2CH2CH2NHBoc (218 μl, 1.38 mmol) and 1-(3-dimethylaminopropyl)-3-ethyl-carbodiimide hydrochloride (1.06 g, 5.52 mmol). The reaction mixture was stirred for 24 hours at room temperature in a flow of argon and concentrated under reduced pressure. Purification on a silica gel column (eluent: CH2Cl2:MeOH:NH4OH=6:1:0.1) gave 646 mg of the compound S7.
MS (ES) m/z: [MH]+ 505.46
A solution of compound S7 (630 mg, 1.25 mmol) in TFA (3 ml) and CH2Cl2 (3 ml) was stirred at room temperature for 1.5 hours. TFA and CH2Cl2 was removed under vacuum, and remaining traces of TFA were removed by addition and removal under vacuum of CH2Cl2 (several portions) to give 1.32 g of the compound S13.
MS (ES) m/z: [MH]+ 405.30
A solution of steroid S1 (1.5 g, 3.96 mmol) and triethylamine (1.1 ml, 7.93 mmol) in CH2Cl2 (40 ml) at 0° C. was treated with acryloyl chloride (644 μl, 7.93 mmol). After 30 min the reaction mixture was washed with sat. NaHCO3 and then H2O, dried over anhydrous Na2SO4 and evaporated under reduced pressure to give the solid intermediate. This was stirred in acetone (30 mL) with diethylamine (2.07 mL, 19.8 mmol) for 2 hours. Solution was concentrated, diluted with water and washed with ethyl acetate. The aqueous phase was acidified to pH 2 with 2 M HCl and filtered to provide a solid. 1.28 g of the compound S9 was obtained. MS (ES) m/z: [MH]+ 433.28; IR (KBr) cm−1: 3477, 2940, 2879, 2601, 1731, 1655, 1596, 1452, 1401, 1376, 1276, 1401, 1376, 1276, 1221, 1195, 1146, 1118, 1064, 1038, 1011, 975, 951, 931, 904, 874, 832, 812, 767, 703, 657, 635.
To a solution of compound S9 (1.1 g, 2.54 mmol) in dry THF (8 ml) under argon, was added LiOHxH2O (106 mg, 2.54 mmol). Reaction mixture was stirred at room temperature for 30 min. Me2SO4 (235 μl, 2.54 mmol) was then added and the resulting mixture was stirred at 65° C. for 3 hours. The reaction mixture was diluted with ethyl acetate (30 ml) and washed with sat. NaHCO3 and then with water. Organic layer was dried over Na2SO4 and the solvent evaporated under reduced pressure. 925 mg of the compound S10 was obtained. MS (ES) m/z: [MH]+ 447.32; IR (KBr) cm−1: 3333, 3111, 2944, 2878, 1753, 1728, 1659, 1604, 1450, 1434, 1409, 1285, 1262, 1239, 1192, 1148, 1117, 1101, 1065, 1043, 1013, 977, 928, 893, 879, 809, 707, 686, 662.
In a solution of compound S10 (800 mg, 1.8 mmol) in MeOH (20 ml) and CH3CN (10 ml) NH2CH2CH2NHBoc (570 μl, 3.6 mmol) was added. Reaction mixture was stirred at 55° C. for 24 hours. After evaporation of the solvent under reduced pressure mixture was purified on a silica gel column in the solvent system CH2Cl2:MeOH:NH4OH=90:9:1.5. 925 mg of the compound S14 was obtained. MS (ES) m/z: [MH]+ 607.38; IR (KBr) cm−1: 3404, 2975, 2941, 2878, 1745, 1665, 1619, 1509, 1459, 1392, 1366, 1268, 1243, 1175, 1116, 1064, 1047, 1032, 1015, 977, 929, 889, 814, 795, 735, 706, 687, 656.
A solution of compound S14 (697 mg, 1.15 mmol) in TFA (2 ml) and CH2Cl2 (2 ml) was stirred at room temperature for 2 hours. TFA and CH2Cl2 was removed under vacuum, and remaining traces of TFA were removed by addition and removal under vacuum of CH2Cl2 (several portions). Crude product was diluted in CH2Cl2 (20 ml) and extracted with water. Aqueous layer was neutralised with NaOH and extracted with ethyl acetate (2×20 ml). The organic layers were combined, dried over Na2SO4, filtered and concentrated under vacuum. 523 mg of the compound S22 was obtained. MS (ES) m/z: [MH]+ 507.44; IR (KBr) cm−1: 3416, 2940, 2878, 1741, 1664, 1619, 1452, 1392, 1375, 1268, 1240, 1201, 1178, 1117, 1064, 1047, 1032, 1014, 977, 928, 889, 799, 721, 686.
A solution of steroid S5 (500 mg, 1.32 mmol) and triethylamine (0.37 mL, 2.64 mmol) in CH2Cl2 (30 ml) at 0° C. was treated with acryloyl chloride (0.22 mL, 2.64 mmol). After 30 min the reaction mixture was diluted with CH2Cl2, washed with aqueous NaHCO3 and then H2O, dried and evaporated to give the solid intermediate. This was stirred in acetone (25 mL) with diethylamine (0.69 mL, 6.61 mmol) for 2 hours. Solution was concentrated, diluted with water and washed with EtOAc. The aqueous phase was acidified to pH 2 with 2 N HCl and filtered to provide a solid. 259 mg of compound S15 was obtained. MS (m/z): 433.36 [MH]+; IR(cm−1)/KBr: 3438, 3246, 2937, 2878, 2656, 1731, 1717, 1663, 1628, 1609, 1458, 1453, 1409, 1365, 1318, 1300, 1278, 1260, 1193, 1180, 1118, 1080, 1061, 1038, 988, 971, 928, 900, 835, 807, 780, 719, 706.
A solution of steroid S2 (0.5 g, 1.26 mmol) and triethylamine (0.35 mL, 2.52 mmol) in CH2Cl2 (30 ml) at 0° C. was treated with acryloyl chloride (0.21 mL, 2.52 mmol). After 30 min the reaction mixture was diluted with CH2Cl2, washed with aqueous NaHCO3 and then H2O, dried and evaporated to give the solid intermediate. This was stirred in acetone (25 ml) with diethylamine (0.66 mL, 6.31 mmol) for 2 hours. Solution was concentrated, diluted with water and washed with EtOAc. The aqueous phase was acidified to pH 2 with 2 N HCl and filtered to provide a solid. 212 mg of compound S11 was obtained. MS (m/z): 451.00 [MH]+; IR(cm−1)/KBr: 3423, 2941, 2880, 2624, 1726, 1665, 1619, 1609, 1458, 1407, 1377, 1301, 1261, 1234, 1199, 1150, 1120, 1071, 1041, 1028, 993, 978, 937, 899, 851, 808, 777, 710, 659.
1,8-Diazabicyclo[5.4.0]undec-7-ene (DBU) (1 equiv, 0.11 mmol) was added to a 10% solution of acid S11 (0.11 mmol, 50 mg) in dimethylcarbonate and the resulting mixture was heated (100° C.) for 10 minutes in microwave reactor. Reaction mixture was cooled to room temperature and diluted with CH2Cl2 and water. The organic layer was dried over Na2SO4, evaporated and purified on a silica gel column in the solvent system CH2Cl2:MeOH=12:1. 39 mg of the compound S12 was obtained. MS (m/z): 464.96 [MH]+; IR(cm−1)/KBr: 3339, 2978, 2943, 2881, 1736, 1663, 1619, 1606, 1452, 1452, 1432, 1406, 1375, 1285, 1255, 1243, 1214, 1194, 1116, 1103, 1072, 1042, 1006, 990, 978, 933, 896, 851, 812, 735, 712, 685.
A solution of steroid S16 (0.5 g, 1.44 mmol) and triethylamine (0, 40 mL, 2.89 mmol) in CH2Cl2 (30 ml) at 0° C. was treated with acryloyl chloride (0.24 mL, 2.89 mmol). After 30 min the reaction mixture was diluted with CH2Cl2, washed with aqueous NaHCO3 and then H2O, dried and evaporated to give the solid intermediate. This was stirred in acetone (25 mL) with diethylamine (0.75 mL, 7.22 mmol) for 2 hours. Solution was concentrated, diluted with water and washed with EtOAc. The aqueous phase was acidified to pH 2,with 2 N HCl and filtered to provide a solid. 260 mg of compound S17 was obtained. MS (m/z): 401.25 [MH]+; IR(cm−1)/KBr: 3567, 3448, 2938, 2914, 2851, 2643, 2602, 1732, 1713, 1653, 1606, 1596, 1452, 1406, 1394, 1346, 1297, 1258, 1212, 1184, 1126, 1084, 1040, 988, 972, 941, 930, 908, 888, 828, 812, 769, 719, 656.
1,8-Diazabicyclo[5.4.0]undec-7-ene (DBU) (1 equiv, 0.23 mmol) was added to a 10% solution of acid S15 (0.23 mmol, 100 mg) in dimethylcarbonate and the resulting mixture was heated to reflux (90° C.). After completion, the reaction mixture was cooled to room temperature and diluted with EtOAc and water. The organic layer was dried over Na2SO4, evaporated and purified on a silica gel column in the solvent system CH2Cl2:MeOH:NH4OH=90:8:1. 40 mg of the compound S18 was obtained. MS (m/z): 447.39 [MH]+; IR(cm−1)/KBr: 3423, 3368, 2973, 2944, 2875, 1737, 1726, 1657, 1619, 1602, 1459, 1450, 1406, 1389, 1367, 1307, 1284, 1242, 1196, 1116, 1083, 1065, 1040, 987, 976, 941, 928, 895, 828, 812, 712, 671.
1,8-Diazabicyclo[5.4.0]undec-7-ene (DBU) (1 equiv, 0.25 mmol) was added to a 10% solution of acid S17 (0.2-5 mmol, 100 mg) in dimethylcarbonate and the resulting mixture was heated to reflux (90° C.). After completion, the reaction mixture was cooled to room temperature and diluted with EtOAc and water. The organic layer was dried over Na2SO4, evaporated and purified on a silica gel column in the solvent system CH2Cl2:MeOH:NH4OH=90:8:1. 42 mg of the compound S19 was obtained.
MS (m/z): 415.32 [MH]+
A solution of steroid S6 (700 mg, 1.942 mmol) and triethylamine (0.54 mL, 3.884 mmol) in CH2Cl2 (50 ml) at 0° C. was treated with acryloyl chloride (0.315 mL, 3.884 mmol). After 30 min the reaction mixture was diluted with CH2Cl2, washed with aqueous NaHCO3 and then H2O, dried and evaporated to give the solid intermediate. This was stirred in acetone (40 mL) with diethylamine (1.015 mL, 9.71 mmol) for 2 hours. Solution was concentrated, diluted with water and washed with EtOAc. The aqueous phase was acidified to pH 2 with 2 N HCl and filtered to provide a solid. 111 mg of compound S23 was obtained. MS (m/z): 415.48 [MH]+
In a solution of compound S23 (100 mg, 0.24 mmol) in dry THF (1.5 mL) 10.1 mg (0.24 mmol) of LiOHxH2O was added. Reaction mixture was stirred at room temperature for 30 min. In the reaction mixture 22.3 μL of Me2SO4 (0.24 mmol) was added and the mixture was stirred for 2 hours at 65° C. After completion, the reaction mixture was cooled to room temperature, diluted with 20 mL EtOAc and then treated sequentially with 20 mL of saturated NaHCO3 and 20 mL of water. The organic layer was dried over Na2SO4, and evaporated. 121 mg of compound S24 was obtained. MS (m/z): 429.48 [MH]+
Preparation of compound S25
To the solution of 1.0 g (2.30 mmol) paramethasone acetate in 20 mL toluene, 960 μL (6.90 mmol, 3 eq) TEA was added, followed by 219 μL (2.30 mmol, 1 eq) 3-chloropropionyl chloride. The solution was stirred at room temperature for 24 hours, the evaporated and the crude product purified on the silicagel column, using solvent system ethyl-acetate:hexane 5:3. 417 mg of pure product was isolated.
MS (m/z):489.38 [MH]+ MS (teor.)=488.55
Purity (HPLC-MS): 96.42%
IR (KBr): 3386, 3112, 3037, 2960, 2924, 2876, 1751, 1724, 1679, 1619, 1602, 1501, 1452, 1410, 1388, 1373, 1342, 1318, 1267, 1234, 1198, 1178, 1139, 1120, 1092, 1050, 1028, 1011, 986, 916, 894, 871, 845, 816, 789, 742, 721, 695, 657.
Preparation of compound S26
To the solution of 100 mg (0.205 mmol) compound 825 in u 5 mL THF, 17 mg (0.410 mmol) LiOHxH2O and 5 mL water was added and the reaction mixture stirred at room temperature for 15 min. pH was then adjusted to 8 using 1M NaOH, and the product extracted with DCM. The organic layer was dried over anhydrous Na2SO4 and evaporated giving 28 mg of pure product.
MS (m/z): 447.10 [MH]+ MS (teor.)=446.51
Purity (HPLC-MS): 98.37%
A solution of compound S12 in 10 mL of dry THF was treated with 30.7 mg (1.0 mmol) K2CO3 and 0.0197 mL (1.1 mmol) ethyl-iodide. The reaction mixture was stirred at room temp. for 24 h but no product was obtained. Heating the mixture to 55° C. resulted with product in 2 hours. The mixture was poured into a mixture of 20 mL DCM and 20 mL water and extracted. The organic layer was washed with water, dried over anhydrous Na2SO4 and evaporated. 45 mg of crude product was isolated.
MS (m/z):479.09 [MH]+ MS (teor.)=478.53
Purity (HPLC-MS): 76.77%
Precursors for the synthesis are nonsteroidal anti-inflammatory drugs (NSAID), such as aceclofenac, acemetacin, acetaminophen, acetaminosalol, acetyl-salicylic acid, acetyl-salicylic-2-amino-4-picoline-acid, -5-aminoacetylsalicylic acid, alclofenac, amino-profen, amfenac, anileridine, bendazac, benoxaprofen, bermoprofen, α-bisabolol, bromfenac, 5-bromosalicylic acid acetate, bromosaligenin, bucloxic acid, butibufen, carprofen, chromoglycate, cinmetacin, clindanac, clopirac, sodium diclofenac, diflunisal, ditazol, enfenamic acid, etodolac, etofenamate, felbinac, fenbufen, fenclozic acid, fendosal, fenoprofen, fentiazac, fepradinol, flufenamic acid, flunixin, flunoxaprofen, flurbiprofen, glutametacin, glycol salicylate, ibufenac, ibuprofen, ibuproxam, indomethacin, indoprofen, isofezolac, isoxepac, isoxicam, ketoprofen, ketorolac, lornoxicam, loxoprofen, meclofenamic acid, mefenamic acid, meloxicam, mesalamine, metiazinic acid, mofezolac, montelukast, naproxen, niflumic acid, olsalazine, oxaceprol, oxaprozin, oxyphenbutazone, parsalmide, perisoxal, phenyl-acethyl-salicylate, phenylbutazone, phenylsalicylate, pyrazolac, piroxicam, pirprofen, pranoprofen, protizinic acid, salacetamide, salicylamide-O-acetyl acid, salicylsulphuric acid, salicin, salicylamide, salsalate, sulindac, suprofen, suxibutazone, tenoxicam, tiaprofenic acid, tiaramide, tinoridine, tolfenamic acid, tolmetin, ttopesin, xenbucin, ximoprofen, zaltoprofen, zomepirac, tomoxiprol, zafirlukast, and some example of precursors are flunixin (D10), flufenamic acid (D11) and celecoxib (D12)
A mixture of celecoxib (D12) (4 g, 10.5 mmol), DMAP (640 mg, 5.24 mmol), di-t-butyl dicarbonate (7.52 mL, 31.5 mmol) and triethylamine (1.75 mL, 12.57 mmol) in anhydrous THF (20 mL) was stirred at room temperature for 1 hour. Methyl bromoacetate (2.63 mL, 26.24 mmol) and K2CO3 (2.9 g, 21 mmol) was then added and the resulting mixture was stirred at room temperature for 22 hours. The reaction mixture was poured into sat. NaHCO3 and extracted with ethyl acetate (2×50 mL). The organic layers were combined, washed with sat. NaCl (50 mL), dried over MgSO4, filtered and concentrated under vacuum. The resulting glass was purified by chromatography (silica gel, 90:9:1.5 CH2Cl2:MeOH:NH4OM) to afford 4.53 g of the product D13 as a white powder. MS (ES) m/z: [MH]+ 554.33; IR (KBr) cm−1 3449, 3136, 3108, 2983, 1919, 1759, 1738, 1618, 1598, 1501, 1473, 1450, 1411, 1372, 1314, 1273, 1239, 1165, 1146, 1095, 1016, 995, 976, 939, 846, 808, 763, 744, 718, 653.
A solution of compound D13 (4.53 g, 8.18 mmol) in TFA (5 mL) and CH2Cl2 (5 mL) was stirred at room temperature for 2 hours. TFA and CH2Cl2 was removed under vacuum, and remaining traces of TFA were removed by addition and removal under vacuum of CH2Cl2 (several portions) to give 4.43 g oil product D14. MS (ES) m/z: [MH]+ 454.27; IR (KBr) cm−1: 3281, 2954, 2925, 1747, 1595, 1555, 1499, 1476, 1438, 1411, 1376, 1354, 1324, 1279, 1238, 1216, 1162, 1133, 1100, 1016, 978, 949, 874, 849, 803, 762, 744, 722, 700, 633.
A solution of compound D14 (4.43 g, 9.77 mmol) in THF (15 mL) was treated with a solution of LiOH (820 mg, 19.54 mmol) in water (15 mL) and stirred for 30 min. TI-IF was removed under vacuum and resulting mixture was adjusted to pH 2 with 0.1 M HCl. Resulting solid was isolated by filtration to give 3.84 g of the compound D15. MS (ES) m/z: [MH]+ 440.25; IR (KBr) cm−1: 3396, 1606, 1574, 1501, 1472, 1415, 1373, 1326, 1274, 1238, 1169, 1156, 1129, 1098, 1022, 974, 930, 847, 813, 758, 628.
To a solution of compound D15 (500 mg, 1.14 mmol) in dry CH2Cl2 (10 mL) under argon, were added triethylamine (1.4 mL, 10 mmol), 1-hydroxybenzotriazole (308 mg, 2.28 mmol), NH2CH2CH2NHBoc (180 μl, 1.14 mmol) and 1-(3-dimethylaminopropyl)-3-ethyl-carbodiimide hydrochloride (874 mg, 4.56 mmol). The reaction mixture was stirred for 24 hours at room temperature in a flow of argon and concentrated under reduced pressure. Purification on a silica gel column (eluent: CH2Cl2:MeOH:NH4OH=6:1:0.1) gave 390 mg of the compound D16. MS (ES) m/z: [MH]+ 582.33; IR (KBr) cm−1: 3378, 2979, 2933, 2878, 1686, 1598, 1528, 1499, 1473, 1450, 1409, 1369, 1341, 1273, 1238, 1163, 1135, 1097, 1006, 976, 843, 827, 808, 761, 744, 719, 694, 627.
A solution of compound D16 (300 mg, 0.52 mmol) in TFA (3 mL) and CH2Cl2 (5 mL) was stirred at room temperature for 2 hours. TFA and CH2Cl2 was removed under vacuum, and remaining traces of TFA were removed by addition and removal under vacuum of CH2Cl2 (several portions) to give 250 mg of the product D17. MS (ES) m/z: [MH]+ 482.19.
To a solution of flufenamic acid D11 (245 mg, 0.87 mmol) in dry CH2Cl2 (20 ml) under argon, were added triethylamine (1.2 ml, 8.73 mmol), 1-hydroxybenzotriazole (240 mg, 1.78 mmol), NH2(CH2)6NHFmoc (300 mg, 0.9 mmol) and 1-(3-dimethylaminopropyl)-3-ethyl-carbodiimide hydrochloride (700 mg, 3.65 mmol). The reaction mixture was stirred for 24 hours at room temperature in a flow of argon and concentrated under reduced pressure. Purification on a silica gel column (eluent: CH2Cl2:MeOH:NH4OH=6:1:0.1) gave 430 mg of the compound D18.
A solution of compound D18 (400 mg, 0.66 mmol) in ethyl acetate (5 mL) and piperidine (2 mL) was stirred at room temperature for 1 hours. Ethyl acetate and piperidine was removed under vacuum. 370 mg of the compound D19 was obtained.
MS (ES) m/z: [MH]+ 380.22
To a solution of flunixin D10 (340 mg, 1.15 mmol) in dry CH2Cl2 (10 mL) under argon, were added triethylamine (1.6 mL, 11.5 mmol), 1-hydroxybenzotriazole (312 mg, 2.3 mmol), NH2(CH2)6NHFmoc (390 mg, 1.15 mmol) and 1-(3-dimethylaminopropyl)-3-ethyl-carbodiimide hydrochloride (880 mg, 4.6 mmol). The reaction mixture was stirred for 24 hours at room temperature in a flow of argon and concentrated under reduced pressure. Purification on a silica gel column (eluent: CH2Cl2:MeOH:NH4OH=6:1:0.1) gave 548 mg of the compound D2O.
MS (ES) m/z: [MH]+ 617.66
A solution of compound D20 (548 mg, 0.89 mmol) in ethyl acetate (5 mL) and piperidine (2 mL) was stirred at room temperature for 1 hours. Ethyl acetate and piperidine was removed under vacuum. 732 mg of the product D21 was obtained.
MS (ES) m/z: [MH]+ 395.45
In a solution of compound S9 (250 mg, 0.58 mmol) in methanol (20 mL) 915 mg (1.16 mmol) of the macrolide M3 was added. Reaction mixture was stirred at 55° C. for 24 hours. After evaporation of the solvent, mixture was purified on a silica gel column in the solvent system CH2Cl2:MeOH:NH4OH 30:50:2. 540 mg of the compound I was obtained. MS (m/z): 909.42 [MH]+.
Compound S13 (1.3 g, 3.2 mmol) and compound M7 (130 mg, 0.3 mmol) was dissolved in pyridine (5 mL). Then, pyridine hydrochloride (35 mg, 0.3 mmol) and 1,8-diazabicyclo[5.4.0]-undec-7-ene (1 ml) were added to the solution. The reaction mixture was stirred at room temperature for 7 days. The product was extracted by CH2Cl2 and washed with water and the organic layer was subsequently dried over Na2SO4 and the solvent evaporated under reduced pressure. After purification of the mixture on a silica gel column in the solvent system CH2Cl2:MeOH:NH4OH=6:1:0.1 80 mg of the product 2 was obtained. MS (ES) m/z: [MH]+ 850.70; IR (KBr) cm−1: 3409, 2939, 2877, 1664, 1535, 1495, 1381, 1296, 1248, 1163, 1091, 1070, 975, 928, 889, 829, 757, 702.
Compound D17 (220 mg, 0.5 mmol) and compound M7 (222 mg, 0.5 mmol) was dissolved in pyridine (5 mL). Then, pyridine hydrochloride (58 mg, 0.5 mmol) and 1,8-diazabycyclo[5.4.0]-undec-7-ene (1 mL) were added to the solution. The reaction mixture was. stirred at room temperature for 6 days. The product was extracted by CH2Cl2 and washed with water and the organic layer was subsequently dried over Na2SO4 and the solvent evaporated under reduced pressure. After purification of the mixture on a silica gel column in the solvent system CH2Cl2:MeOH:NH4OH=90:9:1.5 24 mg of the product 3 was obtained. MS (ES) m/z: [MH]+ 927.68; IR (KBr) cm−1: 3416, 2973, 2934, 2880, 1660, 1599, 1546, 1498, 1471, 1376, 1339, 1272, 1238, 1163, 1134, 1097, 974, 843, 808, 761, 740, 703, 615.
Compound D21 (732 mg, 1.86 mmol) and compound M7 (220 mg, 0.5 mmol) was dissolved in pyridine (7 mL). Then, pyridine hydrochloride (60 mg, 0.5 mmol) and 1,8-diazabycyclo[5.4.0]-undec-7-ene (1 mL) were added to the solution. The reaction mixture was stirred at room temperature for 6 days. The product was extracted by CH2Cl2 and washed with water and the organic layer was subsequently dried over Na2SO4 and the solvent evaporated under reduced pressure. After purification of the mixture on a silica gel column in the solvent system CH2Cl2:MeOH:NH4OH=90:9:1.5 70 mg of the product 4 was obtained. MS (ES) m/z: [MH]+ 840.43; IR (KBr) cm−1: 3339, 2971, 2935, 2878, 1645, 1593, 1524, 1462, 1380, 1320, 1254, 1186, 1168, 1122, 1088, 1023, 975, 927, 795, 772, 720, 665, 614
Compound S22 (220 mg, 0.5 mmol) and compound M7 (223 mg, 0.5 mmol) was dissolved in pyridine (5 mL). Then, pyridine hydrochloride (58 mg, 0.5 mmol) and 1,8-diazabycyclo[5.4.0]-undec-7-ene (1 mL) was added to the solution. The reaction mixture was stirred at room temperature for 6 days. The product was extracted by CH2Cl2 and washed with water and the organic layer was subsequently dried over Na2SO4 and the solvent evaporated under reduced pressure. After purification of the mixture on a silica gel column in the solvent system CH2Cl2:MeOH:NH4OH=90:9:1.5 80 mg of the product 5 was obtained. MS (ES) m/z: [MH]+ 953.80
Compound D19 (380 mg, 0.5 mmol) and compound M7 (222 mg, 0.5 mmol) was dissolved in pyridine (5 mL). Then, pyridine hydrochloride (58 mg, 0.5 mmol) and 1,8-diazabycyclo[5.4.0]-undec-7-ene (1 mL) were added to the solution. The reaction mixture was stirred at room temperature for 6 days. The product was extracted by CH2Cl2 and washed with water and the organic layer was subsequently dried over Na2SO4 and the solvent evaporated under reduced pressure. After purification of the mixture on a silica gel column in the solvent system CH2Cl2:MeOH:NH4OH=90:9:1.5 18 mg of the product 6 was obtained. MS (ES) m/z: [MH]+ 825.47; IR (KBr) cm−1: 3369, 2970, 2935, 2878, 1632, 1595, 1524, 1452, 1426, 1377, 1336, 1283, 1248, 1165, 1124, 1097, 1070, 975, 928, 793, 750, 699, 663.
In a solution of compound S10 (50 mg, 0.11 mmol) in methanol (10 mL) 107 mg (0.22 mmol) of the macrolide M3 was added. Reaction mixture was stirred at 55° C. for 24 hours. After evaporation of the solvent, mixture was purified on a silica gel column in the solvent system CH2Cl2:MeOH:NH4OH=6:1:0.1. 23 mg of the compound 7 was obtained. MS (m/z): 923.47 [MH]+; IR(cm−1)/KBr: 3449, 2938, 2878, 1738, 1665, 1621, 1562, 1544, 1525, 1521, 1460, 1377, 1353, 1266, 1242, 1178, 1099, 1050, 1015, 977, 957, 891, 810, 705, 673.
In a solution of compound S19 (41 mg, 0.099 mmol) in methanol (6 mL) 47 mg (0.009 mmol) of the macrolide M3 was added. Reaction mixture was stirred at 55° C. for 24 hours. After evaporation of the solvent, mixture was purified on a silica gel column in the solvent system CH2Cl2:MeOH:NH4OH=90:8:1. 19 mg of the compound 8 was obtained. MS (m/z): 891.58 [MH]+; IR(cm−1)/1 KBr: 3449, 2974, 2935, 2876, 1871, 1846, 1735, 1658, 1618, 1545, 1509, 1459, 1375, 1352, 1283, 1177, 1127, 1087, 1036, 995, 958, 939, 888, 819, 708.
Reaction mixture of compound S18 (77 mg, 0.17 mmol) in methanol (8 mL) and 165 mg (0.35 mmol) of the macrolide M3 was stirred at 55° C. for 24 hours. After evaporation of the solvent, mixture was purified on a silica gel column in the solvent system CH2Cl2:MeOH:NH4OH=90:8:1 and 36 mg of the compound 9 was obtained. MS (m/z): δ 923.61 [MH]+; IR(cm−1)/KBr: 3449, 2974, 2951, 2935, 2878, 1736, 1665, 1626, 1605, 1561, 1509, 1459, 1375, 1319, 1289, 1254, 1175, 1080, 1038, 958, 928, 900, 822, 757, 719, 666.
Reaction mixture of compound 812 (37 mg, 0.08 mmol) in methanol:acetonitrile (2:5) and 76 mg (0.16 mmol) of the macrolide M3 was stirred at 55° C. for 24 hours. After evaporation of the solvent, mixture was purified on a silica gel column in the solvent system CH2Cl2:MeOH:NH4OH=90:8:1 and 55 mg of the compound 10 was obtained. MS (m/z): 941.97 [MH]+; IR(cm−1)/KBr: 3449, 2964, 2936, 2878, 1736, 1670, 1630, 1561, 1509, 1459, 1376, 1288, 1260, 1236, 1178, 1106, 1074, 1035, 994, 956, 940, 899, 849, 817, 755, 709, 669.
A solution of compound 1 (130 mg, 0.14 mmol) and dimethyltiocarbamoylchloride (35.32 mg, 0.286 mmol) in 2-butanone (10 mL) at room temperature was treated sequentially with triethylamine (0.044 ml, 0.31 mmol), sodium iodide (21 mg, 0.143 mmol), and water (0.013 mL) and stirred for 3 days. Reaction mixture was then treated sequentially with dimethyacetamide (0.52 mL) and water (3.23 mL); cooled to 0° C., stirred for 2 hours and extracted with EtOAc. Organic layer was dried over Na2SO4 and evaporated under reduced pressure. Mixture was purified on a silica gel column in the solvent system CH2Cl2:MeOH:NH4OH=90:9:0.5. 32 mg of the compound 11 was obtained. MS (m/z): 996.48[MH]+; IR(cm−1)/KBr: 3449, 2938, 2878, 1735, 1665, 1624, 1458, 1375, 1250, 1174, 1103, 1056, 1034, 1013, 981, 956, 929, 894, 781, 703, 672.
A solution of compound 1 (130 mg, 0.14 mmol) and dimethylcarbamoylchloride (35.32 mg, 0.286 mmol) in 2-butanone (10 mL) at room temperature was treated sequentially with triethylamine (0.044 ml, 0.31 mmol), sodium iodide (21 mg, 0.143 mmol), and water (0.013 mL) and stirred for 3 days. Reaction mixture was then treated sequentially with dimethyacetamide (0.52 mL) and water (3.23 mL); cooled to 0° C., stirred for 2 hours and extracted with EtOAc. Organic layer was dried over Na2SO4 and evaporated under reduced pressure. Mixture was purified on a silica gel column in the solvent system CH2Cl2:MeOH:NH4OH=90:9:0.5. 30 mg of the compound 12 was obtained. MS (m/z): 980.5 [MH]+
In a solution of compound S24 (70 mg, 0.163 mmol) in 10 mL of methanol and 5 mL of acetonitrile 156 mg (0.327 mmol) of the macrolide M3 was added. Reaction mixture was stirred at 55° C. for 24 hours. After evaporation of the solvent, mixture was purified on a silica gel column in the solvent system CH2Cl2:MeOH:NH4OH=90:9:1,5. 50 mg of the compound 13 was obtained. MS (m/z): 906.00 [MH]+.
Compound M10 (60 mg; 0.09 mmol) and compound S12 (42 mg; 0.09 mmol) were dissolved in MeOH (10 ml) and CH3CN (5 ml) and the resulting reaction mixture was stirred at 50° C. over night. After concentrating solvents under vacuum the crude product was purified two times on silica gel column in the solvent system CH2Cl2:MeOH:NH4OH 90:8:1 giving 31 mg of compound 14.
LC/MS (area %): 94%.
HPLC-MS: MS (ES) m/z: [MH]+ 1138.80 (calcd. 1138.73)
IR (KBr) cm−1: 3417, 2932, 2855, 1742, 1670, 1633, 1547, 1457, 1376, 1288, 1260, 1181, 1091, 1074, 1051, 994, 957, 940, 899, 849, 818, 711.
In 10 mL MeOH, 25 mg of compound S26 was disolved followed by addition 134.68 mg of amine M3. The reaction mixture was stirred for 24 h at 55° C. After evaporation of the solvent, product was purified on on a silica gel column using solvent system CHCl3:MeOH:NH4OH 6:1:0.1 giving 12 mg of compound 15.
MS (m/z):923.31 [MH]+ MS (teor.)=923.16
Purity (HPLC-MS): 93.50%
To a solution of 45 mg (0.094 mmol) of compound S27 in 10 mL MeOH, 89.6 mg (0.188 mmol) of amine M3 was added. The reaction mixture was stirred for 24 h at 55° C. After evaporation of the solvent, product was purified on on a silica gel column using solvent system CHCl3:MeOH:NH4OH 6:1:0.1 giving 15 mg of compound 16.
MS (m/z):955.41 [MH]+ MS (teor.)=955.17
Purity (HPLC-MS): 88.26%
To a solution of 100 mg (0.215 mmol) of compound S12 in 10 mL MeOH, 137.3 mg (0.280 mmol) amine M11 (prepared as described in international publication WO2004/094449, example 16) was added. The reaction mixture was stirred for 24 h at 55° C. After evaporation of the solvent, product was purified on a silica gel column using solvent system CHCl3:MeOH:NH4OH 6:1:0.1 giving 139 mg of compound 17.
MS (m/z):955.35 [MH]+ MS (teor.)=954.56
Purity (HPLC-MS): 97.65%
IR (KBr): 3450, 2939, 2879, 1738, 1671, 1628, 1562, 1545, 1525, 1459, 1377, 1288, 1259, 1236, 1179, 1072, 1053, 1036, 994, 957, 941, 900, 850, 817, 756, 709, 667.
To a solution of 100 mg (0.215 mmol) of compound S12 in 10 mL MeOH, 137.3 mg (0.280 mmol) of amine M12 (prepared as described in international publication WO2004/094449, example 17) was added. The reaction mixture was stirred for 24 b at 55° C. After evaporation of the solvent, product was purified on on a silica gel column using solvent system CHCl3:MeOH:NH4OH 6:1:0.1 giving 162 mg of compound 18.
MS (m/z):983.37 [MH]+ MS (teor.)=982.59
Purity (HPLC-MS): 98.68%
IR (KBr): 3448, 2937, 2878, 1736, 1671, 1631, 1458, 1376, 1288, 1259, 1236, 1178, 1105, 1073, 1053, 1036, 994, 975, 957, 941, 899, 849, 817, 755, 709, 664.
To a solution of 150 mg (0.307 mmol) of compound S25 in 10 mL MeOH, 292.6 mg (0.615 mmol) of amine M3 was added. The reaction mixture was stirred for 24 h at 55° C. After evaporation of the solvent, product was purified on on a silica gel column using solvent system CHCl3:MeOH:NH4OH 6:1:0.1 giving 43 mg of compound 19.
MS (m/z):983.37 [MH]+ MS (teor.)=965.19
Purity (HPLC-MS): 98.15%
Compound 10 (97 mg; 0.1 mmol) was dissolved in MeOH (10 ml), and cooled to 2° C. At this temperature, acetanhydride (2 μl; 0,2 mmol) was added drop wise to the reaction mixture. After stirring for three hours at this temperature, the solvent was evaporated and a white, oily product was obtained which was subsequently purified on a silica gel column, eluent CHCl3:MeOH:NH4OH 90:8:1. 88 mg of the compound 20 was obtained.
HPLC-MS: MS (ES) m/z: [MH]+ 983.5
IR (KBr) cm−1: 3444, 2953, 2879, 1744, 1714, 1671, 1633, 1455, 1377, 1289, 1259, 1180, 1074, 1049, 1035, 994, 957, 940, 899, 849, 818, 709
Compound 10 (100 mg; 0.1 mmol) was dissolved in MeOH (10 ml). In the solution N,N-diisopropylethylamine (177 μl; 1 mmol) and iodoethane (52 μl; 0.65 mmol) were added. The reaction mixture was stirred at 50° C. for 24 hours. The solvent was evaporated under vacuum and crude product was purified on silica gel column in the solvent system
CH2Cl2:MeOH:NH4OH 90:8:1. 22 mg of the compound 21 was obtained.
MS (ES) m/z: [MH]+ 969.4
Compound 10 (200 mg; 0,2 mmol) was dissolved in CH3CN (10 ml). In the solution N,N-diisopropylethylamine (442 μl; 2.6 mmol) and 2-iodopropane (520 μl; 5.2 mmol) were added. The reaction mixture was stirred at 50° C. for 24 hours. The solvent was evaporated under vacuum and crude product was purified on silica gel column in the solvent system CH2Cl2:MeOH:NH4OH 90:8:1. 70 mg of the compound 22 was obtained.
MS (ES) m/z: [MH]+ 983.5
Compound 10 (200 mg; 0.2 mmol) was dissolved in THF (10 ml). In the solution methylbromoacetate (46 μl; 0.5 mmol) and potassium carbonate (55 mg; 0.4 mmol) were added. The reaction mixture was stirred at room temperature for 20 hours. The solvent was evaporated under vacuum and crude product was purified on silica gel column in the solvent system CH2Cl2:MeOH:NH4OH 90:8:1. 148 mg of the compound 23 was obtained.
MS (ES) m/z: [MH]+ 1013.5
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/IB05/03213 | 10/27/2005 | WO | 00 | 5/2/2007 |
| Number | Date | Country | |
|---|---|---|---|
| 60623154 | Oct 2004 | US |
