Anticholinergics, processes for the preparation thereof, and pharmaceutical compositions

SUMMARY OF THE INVENTION

[0002] The present invention relates to new anticholinergics of general formula 1

[0003] wherein X− and the groups A, B, R, R1, R2, R3, R3′, R4, R4′, Rx, and Rx′, may have the meanings given in the claims and in the specification, processes for preparing them, and their use as pharmaceutical compositions.

DESCRIPTION OF THE INVENTION

[0004] The present invention relates to compounds of general formula 1

[0005] wherein:

[0006] X− denotes an anion with a single negative charge, preferably an anion selected from among chloride, bromide, iodide, sulfate, phosphate, methanesulfonate, nitrate, maleate, acetate, citrate, fumarate, tartrate, oxalate, succinate, benzoate, and p-toluenesulfonate;

[0007] A and B, which may be identical or different, preferably identical, denote —O—, —S—, —NH—, —CH2—, —CH═CH, or —N(C1-C4-alkyl)-;

[0008] R denotes hydrogen, hydroxy, —C1-C4-alkyl, —C1-C4-alkyloxy, —C1-C4-alkylene-halogen, —O—C1-C4-alkylene-halogen, —C1-C4-alkylene-OH, —CF3, —CHF2, —C1 -C4-alkylene-C1-C4-alkyloxy, —O—COC1-C4-alkyl, —O—COC1-C4-alkylene-halogen, —C1-C4-alkylene-C3-C6-cycloalkyl, —O—COCF3, or halogen;

[0009] R1 and R2, which may be identical or different, denote —C1-C5-alkyl, which may optionally be substituted by —C3-C6-cycloalkyl, hydroxy, or halogen, or

[0010] R1 and R2 together denote a —C3-C5-alkylene bridge;

[0011] R3, R4, R3′, and R4′, which may be identical or different, denote hydrogen, C1-C4-alkyl, C1-C4-alkyloxy, hydroxy, —CF3, —CHF2, —CN, —NO2, or halogen; and

[0012] Rx and Rx′, which may be identical or different, denote hydrogen, C1-C4-alkyl, C1-C4-alkyloxy, hydroxy, —CF3, —CHF2, —CN, —NO2, or halogen, or

[0013] Rx and Rx′ together denote a single bond or a bridging group selected from among the bridges —O—, —S—, —NH—, —CH2—, —CH2—CH2—, —N(C1-C4-alkyl)-, —CH(C1-C4-alkyl)-, and —C(C1-C4-alkyl)2-.

[0014] Preferred compounds of general formula 1 are those wherein:

[0015] X− denotes an anion with a single negative charge selected from among chloride, bromide, 4-toluenesulfonate, and methanesulfonate, preferably bromide;

[0016] A and B, which may be identical or different, preferably identical, denote —O—, —S—, —NH—, or —CH═CH—;

[0017] R denotes hydrogen, hydroxy, —C1-C4-alkyl, —C1-C4-alkyloxy, —CF3, —CHF2, fluorine, chlorine, or bromine;

[0018] R1 and R2, which may be identical or different, denote C1-C4-alkyl, which may optionally be substituted by hydroxy, fluorine, chlorine, or bromine, or

[0019] R1 and R2 together denote a —C3-C4-alkylene-bridge;

[0020] R3, R4, R3′, and R4′, which may be identical or different, denote hydrogen, C1-C4-alkyl, C1-C4-alkyloxy, hydroxy, —CF3, —CHF2, —CN, —NO2, fluorine, chlorine, or bromine; and

[0021] Rx and Rx′, which may be identical or different, denote hydrogen, C1-C4-alkyl, C1-C4-alkyloxy, hydroxy, —CF3, —CHF2, —CN, —NO2, fluorine, chlorine, or bromine, or

[0022] Rx and Rx′ together denote a single bond or a bridging group selected from among the bridges —O—, —S—, —NH—, and —CH2—.

[0023] Particularly preferred compounds of general formula 1 are those wherein:

[0024] X− denotes an anion with a single negative charge selected from among chloride, bromide, and methanesulfonate, preferably bromide;

[0025] A and B, which may be identical or different, preferably identical, denote —S— or —CH═CH—;

[0026] R denotes hydrogen, hydroxy, methyl, ethyl, methyloxy, ethyloxy, —CF3, or fluorine;

[0027] R1 and R2, which may be identical or different, denote methyl, ethyl, —CH2F, or —CH2CH2F, preferably methyl or ethyl;

[0028] R3, R4, R3′, and R4′, which may be identical or different, denote hydrogen, methyl, methyloxy, —CF3, or fluorine;

[0029] Rx and Rx′, which may be identical or different, denote hydrogen, methyl, methyloxy, —CF3, or fluorine, or

[0030] Rx and Rx′ together denote a single bond or the bridging group —O—.

[0031] Of particular importance according to the invention are compounds of general formula 1, wherein:

[0032] X− denotes an anion with a single negative charge selected from among chloride, bromide, and methanesulfonate, preferably bromide;

[0033] A and B, which may be identical or different, preferably identical, denote —S— or —CH═CH—;

[0034] R denotes hydrogen, hydroxy, or methyl;

[0035] R1 and R2, which may be identical or different, denote methyl or ethyl;

[0036] R3, R4, R3′, and R4′, which may be identical or different, denote hydrogen, —CF3, or fluorine, preferably hydrogen;

[0037] Rx and Rx′, which may be identical or different, denote hydrogen, —CF3, or fluorine, preferably hydrogen, or

[0038] Rx and Rx′ together denote a single bond or the bridging group —O—.

[0039] Also preferred according to the invention are compounds of general formula 1, wherein:

[0040] X− denotes bromide;

[0041] A and B denote —CH═CH—;

[0042] R denotes hydrogen, hydroxy, or methyl;

[0043] R1 and R2 denote methyl;

[0044] R3, R4, R3′, and R4′, which may be identical or different, denote hydrogen or fluorine, preferably hydrogen;

[0045] Rx and Rx′, which may be identical or different, denote hydrogen or fluorine, preferably hydrogen, or

[0046] Rx and Rx′ together denote a single bond or the bridging group —O—.

[0047] The invention relates to the compounds of formula 1 optionally in the form of the individual optical isomers, mixtures of the individual enantiomers or racemates, as well as optionally in the form of the pharmacologically acceptable acid addition salts thereof.

[0048] In the compounds of general formula 1, the groups R3, R4, R3′, and R4′, if they do not represent hydrogen, may in each case be arranged in the ortho, meta, or para position relative to the bond to the “—C—R” group. If none of the groups R3, R4, R3′, and R4′ denotes hydrogen, R3 and R3′ are preferably linked in the para position and R4 and R4′ are preferably linked in the ortho or meta position, most preferably in the meta position. If one of the groups R3 and R4 and one of the groups R3′ and R4′ denotes hydrogen, the other group in each case is preferably bonded in the meta or para position, most preferably in the para position. If none of the groups R3, R4, R3′, and R4′ denotes hydrogen, the compounds of general formula 1 wherein the groups R3, R4, R3′, and R4′ have the same meaning are particularly preferred according to the invention.

[0049] Of particular importance according to the invention are the compounds of general formula 1 wherein the two rings which contain A and B are arranged so that A and B are each in the ortho configuration relative to the bond to the “C—R” carbon. This preferred configuration is particularly important when A and B do not represent —CH═CH—. These compounds correspond to the general formula ortho-1.

[0050] Of particular importance according to the invention are the compounds of general formula 1 wherein A represents —CH═CH— and B represents —CH═CH—. These compounds correspond to general formula 1′.

[0051] Of particular importance according to the invention are the compounds of general formula 1 wherein the ester substituent at the nitrogen bicyclic group is in the α configuration. These compounds correspond to general formula 1-α

[0052] The compounds of general formula 1 preferred according to the invention wherein the two rings which contain A and B are arranged so that A and B in each case ortho-configured relative to the bond to the “C—R” carbon and wherein, moreover, the ester substituent at the nitrogen bicyclic group is α-configured correspond to general formula ortho-1-α

[0053] The compounds of general formula 1 which are particularly preferred according to the invention wherein A represents —CH═CH— and B represents —CH═CH— and wherein the ester substituent at the nitrogen bicyclic group is α-configured correspond to general formula 1′-α.

[0054] The following compounds are particularly important according to the invention: cyclopropyltropinebenzilate methobromide; cyclopropyltropine 2,2-diphenylpropionate methobromide; cyclopropyltropine 9-hydroxyxanthene-9-carboxylate methobromide; cyclopropyltropine 9-methylfluorene-9-carboxylate methobromide; cyclopropyltropine 9-methylxanthene-9-carboxylate methobromide; cyclopropyltropine 9-hydroxyfluorene-9-carboxylate methobromide; and cyclopropyltropine methyl 4,4′-difluorobenzilate methobromide.

[0055] The alkyl groups used, unless otherwise stated, are branched and unbranched alkyl groups having 1 to 4 carbon atoms. Examples include: methyl, ethyl, propyl, or butyl. The groups methyl, ethyl, propyl, or butyl may optionally also be referred to by the abbreviations Me, Et, Prop, or Bu. Unless otherwise stated, the definitions propyl and butyl also include all possible isomeric forms of the groups in question. Thus, for example, propyl includes n-propyl and isopropyl, butyl includes isobutyl, sec-butyl, and tert-butyl, etc.

[0056] The cycloalkyl groups used, unless otherwise stated, are alicyclic groups with 3 to 6 carbon atoms. These are the cyclopropyl, cyclobutyl, cyclopentyl, and cyclohexyl groups. According to the invention, cyclopropyl is of particular importance within the scope of the present invention.

[0057] The alkylene groups used, unless otherwise stated, are branched and unbranched double-bonded alkyl bridges with 1 to 4 carbon atoms. Examples include: methylene, ethylene, propylene, or butylene.

[0058] The alkylene-halogen groups used, unless otherwise stated, are branched and unbranched double-bonded alkyl bridges with 1 to 4 carbon atoms which may be mono-, di-, or trisubstituted, preferably disubstituted, by a halogen. Accordingly, unless otherwise stated, the term alkylene-OH groups denotes branched and unbranched double-bonded alkyl bridges with 1 to 4 carbon atoms which may be mono-, di-, or trisubstituted, preferably monosubstituted, by a hydroxy.

[0059] The alkyloxy groups used, unless otherwise stated, are branched and unbranched alkyl groups with 1 to 4 carbon atoms which are linked via an oxygen atom. The following may be mentioned, for example: methyloxy, ethyloxy, propyloxy, or butyloxy. The groups methyloxy, ethyloxy, propyloxy, or butyloxy may optionally also be referred to by the abbreviations MeO, EtO, PropO, or BuO. Unless otherwise stated, the definitions propyloxy and butyloxy also include all possible isomeric forms of the groups in question. Thus, for example, propyloxy includes n-propyloxy and isopropyloxy, butyloxy includes isobutyloxy, sec-butyloxy, and tert-butyloxy, etc. The word alkoxy may also possibly be used within the scope of the present invention instead of the word alkyloxy. The groups methyloxy, ethyloxy, propyloxy, or butyloxy may optionally also be referred to as methoxy, ethoxy, propoxy, or butoxy.

[0060] The alkylene-alkyloxy groups used, unless otherwise stated, are branched and unbranched double-bonded alkyl bridges with 1 to 4 carbon atoms which may be mono-, di-, or trisubstituted, preferably monosubstituted, by an alkyloxy group.

[0061] The —O—CO-alkyl groups used, unless otherwise stated, are branched and unbranched alkyl groups with 1 to 4 carbon atoms which are bonded via an ester group. The alkyl groups are bonded directly to the carbonyl carbon of the ester group. The term —O—CO-alkyl-halogen group should be understood analogously. The group —O—CO—CF3 denotes trifluoroacetate.

[0062] Within the scope of the present invention halogen denotes fluorine, chlorine, bromine, or iodine. Unless otherwise stated, fluorine and bromine are the preferred halogens. The group CO denotes a carbonyl group.

[0063] As explained hereinafter, the compounds according to the invention may be prepared partly analogously to the methods already known in the art (Diagram 1). The carboxylic acid derivatives of formula 3 are known in the art or may be obtained by methods of synthesis known in the art. If only suitably substituted carboxylic acids are known in the art, the compounds of formula 3 may also be obtained directly from them by acid- or base-catalyzed esterification with the corresponding alcohols or by halogenation with the corresponding halogenation reagents.

[0064] Starting from the compounds of formula 2 the esters of general formula 4 may be obtained by reaction with the carboxylic acid derivatives of formula 3, wherein R′ denotes for example chlorine or a C1-C4-alkyloxy group. When R′ equals C1-C4-alkyloxy this reaction may be carried out for example in a sodium melt at elevated temperature, preferably at about 50° C.-150° C., more preferably at about 90° C.-100° C. at low pressure, preferably at below 500 mbar, most preferably at below 75 mbar. Alternatively, instead of the derivatives 3 wherein R′ denotes C1-C4-alkyloxy, the corresponding acid chlorides (where R is Cl) may also be used.

[0065] The compounds of formula 4 thus obtained may be converted into the target compounds of formula 1 by reacting with the compounds R2—X, wherein R2 and X may have the abovementioned meanings. This synthesis step may also be carried out analogously to the examples of synthesis disclosed in WO 92/16528. In the case wherein R1 and R2 together form an alkylene bridge, there is no need to add the reagent R2—X, as will be apparent to the skilled man. In this case, the compounds of formula 4 contain a suitably substituted group R1 (for example, —C3-C5-alkylene-halogen) according to the above definitions and the compounds of formula 1 are prepared by intramolecular quaternization of the amine.

[0066] Alternatively, the compounds of formula 4 wherein R denotes halogen may also be prepared by the method shown in Diagram 2.

[0067] For this, the compounds of formula 4 wherein R denotes hydroxy are converted into the compounds 4 wherein R denotes halogen using suitable halogenation reagents. The method used for the halogenation reactions to be carried out according to Diagram 2 is sufficiently well known in the art.

[0068] As is apparent from Diagram 1, the intermediate products of general formula 4 have a central importance. Accordingly, in another aspect, the present invention relates to the intermediates of formula 4

[0069] wherein the groups A, B, R, R1, R3, R3′, R4, R4′, Rx, and Rx′ may be defined as above, optionally in the form of the acid addition salts thereof. By acid addition salts are meant salts selected from among the hydrochloride, hydrobromide, hydroiodide, hydrosulfate, hydrophosphate, hydromethanesulfonate, hydronitrate, hydromaleate, hydroacetate, hydrocitrate, hydrofumarate, hydrotartrate, hydrooxalate, hydrosuccinate, hydrobenzoate and hydro-p-toluenesulfonate salts, preferably the hydrochloride, hydrobromide, hydrosulfate, hydrophosphate, hydrofumarate, and hydromethanesulfonate salts.

[0070] As in the compounds of general formula 1, the groups R3, R4, R3′, and R4′, if they do not represent hydrogen, may in each case be arranged in the ortho, meta, or para position relative to the bond to the “—C—R” group in the compounds of general formula 4 as well. If none of the groups R3, R4, R3′, and R4′ denotes hydrogen, R3 and R3′ are preferably linked in the para position and R4 and R4′ are preferably linked in the ortho or meta position, most preferably in the meta position. If one of the groups R3 and R4 and one of the groups R3′ and R4′ denotes hydrogen, the other group in each case is preferably linked in the meta or para position, most preferably in the para position. If none of the groups R3, R4, R3′, and R4′ denotes hydrogen the compounds of general formula 4 which are particularly preferred according to the invention are those wherein the groups R3, R4, R3′, and R4′ have the same meaning.

[0071] As is apparent from Diagram 1, the compounds of formula 2 are used as starting products for preparing the compounds of formula 1. These compounds are not known in the prior art. Accordingly, in another aspect, the present invention relates to compounds of general formula 2

[0072] wherein R1 denotes hydrogen or —C1-C5-alkyl, which may optionally be substituted by —C3-C6-cycloalkyl hydroxy, or halogen, optionally in the form of the acid addition salts thereof.

[0073] By the term acid addition salts are meant salts selected from among the hydrochloride, hydrobromide, sulfate, phosphate, fumarate, and methanesulfonate.

[0074] Preferred compounds of general formula 2 are those wherein R1 denotes hydrogen or C1-C4-alkyl, which may optionally be substituted by hydroxy, fluorine, chlorine, or bromine, optionally in the form of the acid addition salts thereof.

[0075] Particularly preferred compounds of general formula 2 are those wherein R1 denotes hydrogen, methyl, ethyl, —CH2F, or —CH2CH2F, preferably methyl or ethyl, optionally in the form of the acid addition salts thereof.

[0076] Of particular importance according to the invention are compounds of general formula 2 wherein R1 denotes hydrogen, methyl, or ethyl, optionally in the form of the acid addition salts thereof.

[0077] Also preferred according to the invention are compounds of general formula 2 wherein R1 denotes hydrogen or methyl, optionally in the form of the acid addition salts thereof.

[0078] Preferably, according to the invention, the compounds of formula 2 are used as starting materials in the α-configured form. These α-configured compounds are therefore of particular importance according to the invention and correspond to general formula 2-α

[0079] Compounds of general formula 2-α where R1 is methyl are hereinafter referred to as cyclopropyltropine. It is assumed that the alcohol group will be in the a position and the cyclopropyl group will have the exo configuration (i.e., cyclopropyltropine is exo-cyclopropyl-α-tropine). The α-configured compound is optionally known as pseudo-cyclopropyltropine and the endo isomer is known as endo-cyclopropyltropine.

[0080] In another aspect, the present invention relates to the use of compounds of general formula 2 for preparing the compounds of general formula 4. Moreover, the present invention relates to the use of the compounds of general formula 2 as starting materials for preparing the compounds of general formula 1.

[0081] The compounds of general formula 2 may be obtained analogously to the methods known from the prior art starting from the corresponding tropenol derivatives. Suitable cyclopropylating reagents include diazomethane, for example.

[0082] The examples of synthesis described below serve to illustrate the present invention still further. However, they are to be regarded as only examples of the procedure, as further illustration of the invention, without restricting the invention to the object described below by way of example.

[0083] Preparation of the Compound of Formula 2

[0084] Cyclopropyltropine 2a

[0085] 35 mL (0.35 mol) of 40% aqueous potassium hydroxide solution is overlaid with 100 mL of diethyl ether and cooled in the ice bath. For this, 23.64 g (0.101 mol) of N-methyl-N-nitrosourea is added batchwise and then the mixture is stirred for about 10 minutes. The ether phase is decanted off and the solution obtained is used in the following step. 25 mL of the diazomethane solution prepared above is added to a solution of 4.01 g (0.028 mol) of tropenol in 25 mL of diethyl ether and 5 mL of methanol while cooling with an ice bath; 53.4 mg (0.000139 mol) of bis(benzonitrile)dichloropalladium(II) is then added. A further 28 mL of the diazomethane solution is then added batchwise. After about 1.5 hours, the solvent is distilled off in vacuo, the residue remaining is extracted, this solution is filtered, and the solvent is removed by distillation. Yield: 4.25 g of slightly yellowish crystals of 2a (96% of theoretical yield).

EXAMPLE 1

Cyclopropyltroninebenzilate Methobromide

[0086]

[0087] 1.1: Methylbenzilate 3a

[0088] 90 g (0.394 mol) of benzilic acid are dissolved in 900 mL acetonitrile and at 5° C. 109.6 g (0.72 mol) of DBU are added dropwise. After the addition of 204.4 g (1.44 mol) of methyl iodide, the mixture is stirred for 24 hours at ambient temperature (about 20° C. to 23° C.). The solution is evaporated down to the residue, the residue is taken up in diethyl ether and extracted with water. The organic phase is washed with 5% aqueous sodium carbonate solution and water, dried, and the solvent is distilled off. The product is purified by recrystallization from cyclohexane. Yield: 77.19 g of white crystals (81% of theoretical yield); melting point: 74° C.-76° C.

[0089] 1.2: CycloPropyltropinebenzilate 4a

[0090] 5.34 g (0.022 mol) methylbenzilate 3a, 1.53 g (0.01 mol) of 2a, and 0.25 g (0.01 mol) of sodium are heated as a melt over a bath of boiling water at 75 mbar for 1 hour with occasional shaking. After cooling, the sodium residues are dissolved with acetonitrile, the solution is evaporated to dryness and the residue is extracted with dichloromethane/water. The organic phase is extracted with 10% potassium hydrogen sulfate solution and the resulting aqueous phase is made basic and extracted with dichloromethane. The organic phase is separated off, dried, and evaporated to dryness. The product is purified by recrystallization from acetonitrile. Yield: 2.41 g of white crystals (66% of theoretical yield).

[0091] 1.3: Cyclopropyltropinebenzilate Methobromide

[0092] 0.46 g (0.0013 mol) of 4a is taken up in 5 mL acetonitrile and stirred with 1.53 g (0.0082 mol) of 50% methyl bromide solution in acetonitrile in a pressurised reaction vessel at 80° C. After 2 days, the solution is evaporated to dryness, the residue is taken up in acetonitrile and filtered while hot. After cooling, the precipitated crystals are separated off, dried, and recrystallized from acetonitrile. Yield: 0.066 g of white crystals (11% of theoretical yield); melting point: 208° C.-209° C.; elemental analysis: calculated: C, (62.89); H, (6.16); N, (3.06). found: C, (62.98); H, (6.20); N, (3.03).

EXAMPLE 2

Cyclopropyltropine 2,2-diphenylpropionate methobromide

[0093]

[0094] 2.1: 2,2-Diphenylpropionic acid chloride 3b

[0095] 52.08 g (0.33 mol) oxalyl chloride is slowly added dropwise at 20° C. to a suspension of 25.0 g (0.11 mol) of 2,2-diphenylpropionic acid, 100 mL of dichloromethane, and 4 drops of dimethylformamide. It is stirred for 1 hour at 20° C. and 0.5 hour at 50° C. The solvent is distilled off and the residue remaining is used in the next step without any further purification.

[0096] 2.2: Cyclopropyltropine 2,2-diphenylpropionate 4b

[0097] 2.3 g (0.015 mol) of 2a and 2.13 g (0.016 mol) of diisopropylethylamine are placed in 30 mL of dichloromethane and within 15 minutes combined with a solution of acid chloride 3b in dichloromethane prepared as in step 2.1. Then the mixture is stirred for 2 hours at ambient temperature and 72 hours at 40° C. For working up, it is washed with water, dried over magnesium sulfate, and the solvent is distilled off. The product is converted into its hydrochloride with a solution of HCl in diethyl ether. To purify it, the precipitated hydrochloride is taken up in water and extracted with diethyl ether. The aqueous phase is made basic with 10% aqueous sodium carbonate solution and extracted with dichloromethane. The organic phase is dried over magnesium sulfate and the solvent is distilled off. Yield: 2.15 g of yellow oil (36% of theoretical yield).

[0098] 2.3: Cyclopropyltropine 2,2-diphenylpropionate methobromide

[0099] 1.8 g (0.005 mol) of the free base 4b are reacted analogously to the method in step 1.3. The purification is carried out by recrystallization from acetonitrile-diethyl ether. Yield: 1.53 g of white crystals (67% of theoretical yield); melting point: 208° C.-209° C.; elemental analysis: calculated: C, (65.79); H, (6.63); N, (3.07). found: C, (65.47); H, (6.77); N, (3.03).

EXAMPLE 3

Cyclopropyltropine 9-hydroxyxanthene-9-carboxylate methobromide

[0100]

[0101]

3
.1.: Methyl 9-hydroxyxanthene-9-carboxylate 3c

[0102] a) Methylxanthene-9-carboxylate

[0103] A sodium ethoxide solution is generated from 21.75 g (0.95 mol) of sodium and 1500 mL of ethanol. 214 g (0.95 mol) of xanthene-9-carboxylic acid is added batchwise to this solution and the resulting suspension is stirred for 1 hour at ambient temperature. Then the solid is separated off, washed with 1500 mL of diethyl ether, and the isolated crystals are suspended in 1500 mL of dimethylformamide and 126.73 mL (2.0 mol) of methyl iodide is added with stirring. The solution obtained is left to stand for 24 hours at ambient temperature, then diluted with water to a total volume of 6 L, crystallized, suction filtered, washed with water, and dried. Yield: 167 g of white crystals (74% of theoretical yield); melting point: 82° C.

[0104] b) Methyl-9-hydroxyxanthene-9-carboxylate 3c:

[0105] 48.05 g (0.2 mol) of methylxanthene-9-carboxylate is dissolved in 1200 mL of tetrahydrofuran and combined with 23.63 g (0.2 mol) of potassium tert-butoxide at 0° C. Oxygen is then piped in for 2 hours at −10° to −5° C., then the mixture is acidified with 2 N aqueous hydrochloric acid and most of the solvent is removed by distillation. The residue remaining is extracted with ethyl acetate and water, and the organic phase is extracted with aqueous Na2S2O5 solution, washed with water, dried, and the solvent is distilled off. The product is purified by crystallization from diisopropylethyl and cyclohexane. Yield: 11.10 g of white crystals (22% of theoretical yield).

[0106] 3.2: Cyclopropyltropine 9-hydroxyxanthene-9-carboxylate 4c

[0107] 6.0 g (0.023 mol) 3c, 3.065 g (0.02 mol) 2a, and 0.02 g sodium are reacted analogously to step 1.2 to obtain 4c. Yield: 2.2 g of white crystals (25% of theoretical yield); melting point: 115° C.-116° C.

[0108] 3.3: Cyclopropyltropine 9-hydroxyxanthene-9-carboxylate methobromide

[0109] 2.1 g (0.006 mol) of the free base 4c are reacted analogously to the method in step 1.3. The purification is carried out by recrystallization from isopropanol. Yield: 1.05 g of beige crystals (37% of theoretical yield); melting point: 218° C.; elemental analysis: calculated: C, (61.02); H, (5.55); N, (2.97). found: C, (60.40); H, (5.72); N, (2.96).

EXAMPLE 4

Cyclopropyltropine 9-methylfluorene-9-carboxylate methobromide

[0110]

[0111] 4.1.: 9-methylfluorene-9-carboxylic acid 3d

[0112] a) Methyl-9-methylfluorene-9-carboxylate

[0113] A sodium ethoxide solution is prepared from 7.6 g (0.33 mol) sodium and 300 mL of ethanol, and 69.6 g (0.33 mol) of 9-fluorenecarboxylic acid is added batchwise thereto. After the addition has ended, it is stirred for 2.5 hours at ambient temperature. Then it is evaporated to dryness, the residue is suspended in 600 mL of dimethylformamide and 93.96 g (0.662 mol) of methyl iodide is added dropwise. The mixture is stirred for 3 hours at constant temperature. The cloudy solution is stirred into 500 mL of water and 300 mL diethyl ether with cooling and extracted; the organic phase is washed with water and 10% sodium carbonate solution, dried, and evaporated to dryness. The residue is purified by column chromatography, eluent: cyclohexane-ethyl acetate (96:4). Yield: 12.61 g of white crystals (16% of theoretical yield); melting point: 108° C.-109° C.

[0114] b) 9-methylfluorene-9-carboxylic acid 3d:

[0115] 12.6 g (0.053 mol) of methyl 9-methylfluorene-9-carboxylate and 53 mL of 2 molar aqueous sodium hydroxide solution are stirred in 120 mL of 1,4-dioxane for 24 hours at ambient temperature. The dioxane is distilled off, water is added to give a total volume of 300 mL, and the mixture is extracted with diethyl ether. The aqueous phase is acidified with 3 molar aqueous HCl, crystallized and filtered. Yield: 11.25 g of white crystals (95% of theoretical yield); melting point: 168° C.- 169° C.

[0116] 4.2: Cyclopropyltropine 9-methyl-fluorene-9-carboxylate 4d

[0117] The acid chloride is prepared from 4.0 g (0.018 mol) of 3d, 4.53 g (0.036 mol) of oxalyl chloride, and 4 drops of dimethylformamide in 40 mL dichloromethane. 2.48 g (0.016 mol) of 2a and 1.91 g (0.019 mol) of triethylamine are suspended in 30 mL of dichloroethane, the acid chloride is added dropwise to 30 mL of dichloroethane at 30° C. within 15 minutes, and then stirred for 24 hours at 40° C. The suspension is extracted with dichloromethane and water, the organic phase is washed with aqueous acetic acid, dried, and the solvent is removed by distillation. The product is converted into its hydrochloride. To purify it, the precipitated hydrochloride is taken up in water and extracted with diethyl ether. The aqueous phase is made basic and extracted with dichloromethane. The organic phase is dried over magnesium sulfate, and the solvent is distilled off. The crude product is purified by recrystallization from acetonitrile. Yield: 1.81 g of slightly beige crystals (30% of theoretical yield); melting point: 138° C.-139° C.

[0118] 4.3: Cyclopropyltropine 9-methylfluorene-9-carboxylate methobromide

[0119] 1.81 g (0.005 mol) of the free base 4d is reacted analogously to the method in step 1.3. The purification is carried out by recrystallization from acetonitrile. Yield: 1.26 g of white crystals (56% of theoretical yield); melting point: 228° C.-229° C.; elemental analysis: calculated: C, (66.09); H, (6.21); N, (3.08). found: C, (66.26); H, (6.26); N, (3.11).

EXAMPLE 5

Cyclopropyltropine 9-methylxanthene-9-carboxylate methobromide

[0120]

[0121] 5.1: 9-methylxanthene-9-carboxylic acid 3e

[0122] a) Methyl 9-methylxanthene-9-carboxylate

[0123] Starting from 9.61 g (0.04 mol) of methyl 9-xanthenecarboxylate (obtainable according to step 3.1.a) the reaction to obtain the title compound is carried out analogously to the method in step 4.1.a. Yield: 6.05 g of white crystals (60% of theoretical yield); melting point: 91° C.-92° C.

[0124] b) 9-methylxanthene-9-carboxylic acid 3e

[0125] Starting from 20.34 g (0.08 mol) of methyl-9-methylxanthene-9-carboxylate the reaction to obtain the title compound is carried out analogously to the method in step 4.1.b. Yield: 14.15 g of white crystals (74% of theoretical yield); melting point: 207° C.-208° C.

[0126] 5.2: Cyclopropyltropine 9-methylxanthene-9-carboxylate 4e

[0127] The acid chloride is prepared from 5.0 g (0.021 mol) of 3e, 5.53 g (0.042 mol) of oxalyl chloride, and 4 drops of dimethylformamide in 50 mL of dichloromethane. 3.06 g (0.02 mol) of 2a and the acid chloride produced above are reacted analogously to the method in step 4.2 to obtain the title compound. Yield: 1.95 g of slightly beige crystals (26% of theoretical yield); melting point: 87° C.-88° C.

[0128] 5.3: Cyclopropyltropine 9-methylxanthene-9-carboxylate methobromide

[0129] 1.95 g (0.005 mol) of the free base 4e is reacted analogously to the method in step 1.3. The purification is carried out by recrystallization from acetonitrile. Yield: 0.54 g of white crystals (23% of theoretical yield); melting point: 193° C.-194° C.; elemental analysis: calculated: C, (63.83); H, (6.00); N, (2.98). found: C, (61.42); H, (6.24); N, (2.97).

EXAMPLE 6

Cyclopropyltropine 9-hydroxyfluorene-9-carboxylate methobromide

[0130]

[0131] 6.1: Methyl-9-hydroxyfluorene-9-carboxylate 3f

[0132] 50.4 g (0.223 mol) of 9-hydroxy-9-fluorenecarboxylic acid is dissolved in 500 mL of methanol, combined with 5 mL (0.089 mol) of concentrated sulfuric acid and refluxed for 1 hour. After cooling, 100 mL of sodium hydrogen carbonate solution (approx. pH 8) is added and the methanol is largely evaporated down. It is extracted with dichloromethane and water; the organic phase is dried and evaporated to dryness. The purification is carried out by recrystallization from ethyl acetate. Yield: 50.0 g of white crystals (93% of theoretical yield).

[0133] 6.2: Cyclopropyltropine 9-hydroxyfluorene-9-carboxylate 4f

[0134] 6.0 g (0.025 mol) of 3f, 3.45 g (0.023 mol) of 2a, and 0.03 g of sodium are reacted analogously to step 1.2 to obtain 4f. The purification is carried out by recrystallization from acetonitrile. Yield: 3.46 g of white crystals (38% of theoretical yield); melting point: 131° C.-132° C.

[0135] 6.3: Cyclopropyltropine 9-hydroxyfluorene-9-carboxylate methobromide

[0136] 3.36 g (0.009 mol) of the free base 4f are reacted analogously to the method in step 1.3. The purification is carried out by recrystallization from isopropanol. Yield: 3.32 g of white crystals (79% of theoretical yield); melting point: 219° C.-220° C.; elemental analysis: calculated: C, (63.16); H, (5.74); N, (3.07). found: C, (62.93); H, (5.93); N, (3.10).

EXAMPLE 7

Cyclopropyltropine 4,4′-difluoromethylbenzilate methobromide

[0137]

[0138] 7.1.: 4,4′-difluoromethylbenzilate 3g

[0139] a) 4,4′-difluorobenzilic acid

[0140] A solution of 24.62 g (0.1 mol) of 4,4′-difluorobenzil in 250 mL dioxane is added dropwise to a solution of 49.99 g (1.25 mol) of NaOH flakes in 300 mL of water at about 100° C. and stirred for 2 hours. The dioxane is largely distilled off and the aqueous solution remaining is extracted with dichloromethane. When the aqueous solution is acidified with sulfuric acid, a precipitate is deposited, which is suction filtered, washed, and dried. The filtrate is extracted with dichloromethane, the organic phase is dried over Na2SO4 and evaporated to dryness. Yield: 25.01 g (95% of theoretical yield); melting point: 133° C.-136° C.

[0141] b) 4,4′-difluoromethylbenzilate 3g

[0142] 25.0 g (0.095 mol) of 4,4′-difluorobenzilic acid is added to freshly prepared sodium ethoxide solution from 2.17 g (0.095 mol) of sodium and 200 mL of ethanol at 20° C. and stirred for 3 hours. The solution is evaporated to dryness, the residue is dissolved in DMF, 22.57 g (0.16 mol) of methyl iodide are added dropwise at 20° C. and the mixture is stirred for 24 hours. 300 mL of water are added dropwise to the suspension formed, while cooling with ice, the mixture is extracted with diethyl ether, the organic phase is washed with water, dried over Na2SO4, and evaporated to dryness. Yield: 21.06 g (80% of theoretical yield).

[0143] 7.2: Cyclopropyltropine-4,4′-difluoromethylbenzilate 4g

[0144] 6.2 g (0.022 mol) of 3 g, 3.37 g (0.022 mol) of 2a, and 0.051 g sodium are reacted analogously to step 1.2 to obtain 4g. The purification is carried out by recrystallization from acetonitrile. Yield: 4.15 g of white crystals (47% of theoretical yield); melting point: 120° C.-121° C.

[0145] 7.3: Cyclopropyltropine-4,4′-difluoromethylbenzilate methobromide

[0146] 2.0 g (0.005 mol) of the free base 4g is reacted analogously to the method in step 1.3. The purification is carried out by recrystallization from ethanol-diethyl ether. Yield: 1.8 g of white crystals (73% of theoretical yield); melting point: 206° C.-207° C.; elemental analysis: calculated: C, (58.31); H, (5.30); N, (2.83). found: C, (58.15); H, (5.42); N, (2.84).

[0147] It was found that the compounds according to the invention of formula 1 are antagonists of the M3 receptor (Muscarinic Receptor subtype 3). The compounds according to the invention have Ki values of less than 10 nM in terms of their affinity for the M3 receptor. These values were determined by the method described below.

[0148] Chemicals

[0149]

3
H-NMS was obtained from Messrs Amersham of Braunschweig, with a specific radioactivity of 3071 GBq/mmol (83 Ci/mmol). All the other reagents were obtained from Serva of Heidelberg and Merck of Darmstadt.

[0150] Cell Membranes

[0151] We used cell membranes from CHO (Chinese hamster ovary) cells which were transfected with the corresponding genes of the human muscarinic receptor subtypes hm1 to hm5 (BONNER). The cell membranes of the desired subtype were thawed, resuspended by hand with a glass homogenizer, and diluted with HEPES buffer to a final concentration of 20-30 mg of protein/mL.

[0152] Receptor Binding Studies

[0153] The binding assay was carried out in a final volume of 1 mL and consisted of 100 μL of unlabelled substance in various concentrations, 100 μL of radioligand (3H-N-methylscopolamine 2 nmol/L (3H-NMS), 200 μL of membrane preparation, and 600 μL of HEPES buffer (20 mmol/L HEPES, 10 mmol/L MgCl2, 100 mmol/L NaCl, adjusted with 1 mol/L NaOH to pH 7.4).

[0154] The nonspecific binding was determined using 10 μmol/L of atropine.

[0155] The preparation was incubated for 45 minutes at 37° C. in 96-well microtitre plates (Beckman, polystyrene, No. 267001) as a double measurement. The incubation was ended by filtering using an Inotech Cell Harvester (type IH 110) through Whatman G-7 filters. The filters were washed with 3 mL of ice-cooled HEPES buffer and dried before measuring.

[0156] Determining the Radioactivity

[0157] The radioactivity of the filter mats was measured simultaneously using a two-dimensional digital autoradiograph (Berthold, Wildbad, type 3052).

[0158] Evaluation

[0159] The Ki values were calculated using implicit equations which were derived directly from the mass-action law, with the model for the 1 receptor 2 ligand reaction (SysFit—Software, SCHITTKOWSKI).

[0160] Literature

[0161] BONNER TI, New Subtypes of Muscarinic Acetylcholine Receptors, Trends Pharmacol. Sci. 10, Suppl.: 11-15 (1989); SCHITTKOWSKI K, Parameter Estimation in Systems of Nonlinear Equations, Numer Math. 68: 129-142 (1994).

[0162] The compounds of formula 1 according to the invention are characterized by their range of uses in the therapeutic field. Particular mention should be made of those applications for which the compounds of formula 1 according to the invention may preferably be used on the basis of their pharmaceutical activity as anticholinergics.

[0163] These are, for example, the treatment of asthma or COPD (chronic obstructive pulmonary disease). The compounds of general formula 1 may also be used to treat vagally induced sinus bradycardia and to treat heart rhythm disorders. Generally, the compounds according to the invention may also be used therapeutically to treat spasms, for example, in the gastrointestinal tract. They may also be used to treat spasms in the urinary tract and also to treat menstrual pain, for example. Of the ranges of indications mentioned above, the treatment of asthma and COPD with the compounds of formula 1 according to the invention is of particular importance.

[0164] The compounds of general formula 1 may be used on their own or in conjunction with other active substances of formula 1. The compounds of general formula 1 may also be used in combination with other pharmacologically active substances. These may be, in particular, betamimetics, antiallergics, PAF antagonists, PDE-IV inhibitors, leukotriene antagonists, p38 kinase inhibitors, EGFR-kinase inhibitors, and corticosteroids, as well as combinations of active substances.

[0165] Examples of betamimetics which may be used according to the invention in conjunction with the compounds of formula 1 include compounds selected from among bambuterol, bitolterol, carbuterol, clenbuterol, fenoterol, formoterol, hexoprenaline, ibuterol, pirbuterol, procaterol, reproterol, salmeterol, sulphonterol, terbutaline, tolubuterol, 4-hydroxy-7-[2-{[2-{[3-(2-phenylethoxy)propyl]sulfonyl}ethyl]amino}ethyl]-2(3H)-benzothiazolone, 1-(2-fluoro-4-hydroxyphenyl)-2-[4-(1-benzimidazolyl)-2-methyl-2-butylamino]ethanol, 1-[3-(4-methoxybenzylamino)-4-hydroxyphenyl]-2-[4-(1-benzimidazolyl)-2-methyl-2-butylamino]ethanol, 1-[2H-5-hydroxy-3-oxo-4H-1,4-benzoxazin-8-yl]-2-[3-(4-N,N-dimethylaminophenyl)-2-methyl-2-propylamino]ethanol, 1-[2H-5-hydroxy-3-oxo-4H-1,4-benzoxazin-8-yl]-2-[3-(4-methoxyphenyl)-2-methyl-2-propylamino]ethanol, 1-[2H-5-hydroxy-3-oxo-4H-1,4-benzoxazin-8-yl]-2-[3-(4-n-butyloxyphenyl)-2-methyl-2-propylamino]ethanol, 1-[2H-5-hydroxy-3-oxo-4H-1,4-benzoxazin-8-yl]-2-{4-[3-(4-methoxyphenyl)-1,2,4-triazol-3-yl]-2-methyl-2-butylamino}ethanol, 5-hydroxy-8-(1-hydroxy-2-isopropylaminobutyl)-2H-1,4-benzoxazin-3-(4H)-one, 1-(4-amino-3-chloro-5-trifluormethylphenyl)-2-tert-butylamino)ethanol and 1-(4-ethoxycarbonylamino-3-cyano-5-fluorophenyl)-2-(tert-butylamino)ethanol, optionally in the form of the racemates, the enantiomers, the diastereomers and optionally the pharmacologically acceptable acid addition salts and the hydrates thereof. Most preferably, the betamimetics used as active substances in conjunction with the compounds of formula 1 according to the invention are selected from among fenoterol, formoterol, salmeterol, 1-[3-(4-methoxybenzylamino)-4-hydroxyphenyl]-2-[4-(1-benzimidazolyl)-2-methyl-2-butylamino]ethanol, 1-[2H-5-hydroxy-3-oxo-4H-1,4-benzoxazin-8-yl]-2-[3-(4-N,N-dimethylaminophenyl)-2-methyl-2-propylamino]ethanol, 1-[2H-5-hydroxy-3-oxo-4H-1,4-benzoxazin-8-yl]-2-[3-(4-methoxyphenyl)-2-methyl-2-propylamino]ethanol, 1-[2H-5-hydroxy-3-oxo-4H-1,4-benzoxazin-8-yl]-2-[3-(4-n-butyloxyphenyl)-2-methyl-2-propylamino]ethanol, 1-[2H-5-hydroxy-3-oxo-4H-1,4-benzoxazin-8-yl]-2-{4-[3-(4-methoxyphenyl)-1,2,4-triazol-3-yl]-2-methyl-2-butylamino}ethanol, optionally in the form of the racemates, the enantiomers, the diastereomers, and optionally the pharmacologically acceptable acid addition salts thereof, and the hydrates thereof. Of the betamimetics mentioned above, the compounds formoterol and salmeterol are particularly preferred, optionally in the form of the racemates, the enantiomers, the diastereomers and optionally the pharmacologically acceptable acid addition salts thereof, and the hydrates thereof. According to the invention, the acid addition salts of the betamimetics selected, for example, from among the hydrochloride, hydrobromide, sulfate, phosphate, fumarate, methanesulfonate, and xinafoate are preferred. Particularly preferred in the case of salmeterol are the salts selected from among the hydrochloride, sulfate, and xinafoate, of which the xinafoate is particularly preferred. Particularly preferred in the case of formoterol are the salts selected from among the hydrochloride, sulfate, and fumarate, of which the hydrochloride and fumarate are particularly preferred. According to the invention, formoterol fumarate is of exceptional importance.

[0166] Within the scope of the present invention, the corticosteroids which may optionally be used in conjunction with the compounds of formula 1 may be compounds selected from among flunisolide, beclomethasone, triamcinolone, budesonide, fluticasone, mometasone, ciclesonide, rofleponide, GW 215864, KSR 592, ST-126, and dexamethasone. Preferably, within the scope of the present invention, the corticosteroids are selected from among flunisolide, beclomethasone, triamcinolone, budesonide, fluticasone, mometasone, ciclesonide, and dexamethasone, while budesonide, fluticasone, mometasone and ciclesonide are important and budesonide and fluticasone are particularly important. In some cases, within the scope of the present patent application, the term steroids is used on its own instead of the word corticosteroids. Any reference to steroids within the scope of the present invention includes a reference to salts or derivatives which may be formed from the steroids. Examples of possible salts or derivatives include: sodium salts, sulfobenzoates, phosphates, isonicotinates, acetates, propionates, dihydrogen phosphates, palmitates, pivalates, or furoates. In some cases, the corticosteroids may also occur in the form of their hydrates.

[0167] Examples of PDE-IV inhibitors which may be used according to the invention as a combination with the compound of formula 1 include compounds selected from among enprofylline, roflumilast, ariflo, Bay-198004, CP-325,366, BY343, D-4396 (Sch-351591), V-11294A, and AWD-12-281. Preferred PDE-IV inhibitors are selected from among enprofylline, roflumilast, ariflo, and AWD-12-281, while AWD-12-281 is particularly preferred for combining with the compounds of general formula 1 according to the invention. Any reference to the abovementioned PDE-IV inhibitors also includes, within the scope of the present invention, a reference to any pharmacologically acceptable acid addition salts thereof which may exist. By the physiologically acceptable acid addition salts which may be formed by the abovementioned PDE-IV inhibitors are meant, for example, pharmaceutically acceptable salts selected from among the salts of hydrochloric acid, hydrobromic acid, sulfuric acid, phosphoric acid, methanesulfonic acid, acetic acid, fumaric acid, succinic acid, lactic acid, citric acid, tartaric acid, and maleic acid. According to the invention, the salts selected from among the acetate, hydrochloride, hydrobromide, sulfate, phosphate, and methanesulfonate are preferred.

[0168] Within the scope of the present invention, the term dopamine agonists, which may optionally be used in conjunction with the compounds of formula 1, denotes compounds selected from among bromocriptine, cabergolin, alpha-dihydroergocryptine, lisuride, pergolide, pramipexol, roxindole, ropinirole, talipexole, terguride, and viozan. It is preferable within the scope of the present invention to use, as combination partners with the compounds of formula 1, dopamine agonists selected from among pramipexol, talipexole, and viozan, pramipexol being of particular importance. Any reference to the abovementioned dopamine agonists also includes, within the scope of the present invention, a reference to any pharmacologically acceptable acid addition salts and hydrates thereof which may exist. By the physiologically acceptable acid addition salts thereof which may be formed by the abovementioned dopamine agonists are meant, for example, pharmaceutically acceptable salts selected from among the salts of hydrochloric acid, hydrobromic acid, sulfuric acid, phosphoric acid, methanesulfonic acid, acetic acid, fumaric acid, succinic acid, lactic acid, citric acid, tartaric acid, and maleic acid.

[0169] Examples of antiallergic agents which may be used according to the invention as a combination with the compound of formula 1 include epinastine, cetirizine, azelastine, fexofenadine, levocabastine, loratadine, mizolastine, ketotifene, emedastine, dimetindene, clemastine, bamipine, hexachloropheniramine, pheniramine, doxylamine, chlorophenoxamine, dimenhydrinate, diphenhydramine, promethazine, ebastine, desloratadine, and meclizine. Preferred antiallergic agents which may be used within the scope of the present invention in combination with the compounds of formula 1 according to the invention are selected from among epinastine, cetirizine, azelastine, fexofenadine, levocabastine, loratadine, ebastine, desloratadine, and mizolastine, epinastine and desloratadine being particularly preferred. Any reference to the abovementioned antiallergic agents also includes, within the scope of the present invention, a reference to any pharmacologically acceptable acid addition salts thereof which may exist.

[0170] Examples of PAF antagonists which may be used according to the invention as a combination with the compounds of formula 1 include 4-(2-chlorophenyl)-9-methyl-2-[3(4-morpholinyl)-3-propanon-1-yl]-6H-thieno-[3,2-f][1,2,4]triazolo[4,3-a][1,4]diazepine and 6-(2-chlorophenyl)-8,9-dihydro-1-methyl-8-[(4-morpholinyl)carbonyl]-4H,7H-cyclopenta-[4,5]thieno-[3,2-f][1,2,4]triazolo[4,3-a][1,4]diazepine.

[0171] Especially preferred examples of EGFR-kinase inhibitors which may be used according to the invention as a combination with the compounds of formula 1 include, in particular, 4-[(3-chloro-4-fluorophenyl)amino]-7-[4-((R)-6-methyl-2-oxomorpholin-4-yl)butyloxy]-6-[(vinylcarbonyl)amino]quinazoline, 4-[(3-chloro-4-fluorophenyl)amino]-7-[4-((S)-6-methyl-2-oxomorpholin-4-yl)butyloxy]-6-[(vinylcarbonyl)amino]quinazoline, 4-[(3-chloro-4-fluorophenyl)amino]-7-(2-{4-[(S)-(2-oxotetrahydrofuran-5-yl)carbonyl]piperazin-1-yl}ethoxy)-6-[(vinylcarbonyl)amino]quinazoline, 4-[(3-chloro-4-fluorophenyl)amino]-7-[2-((S)-6-methyl-2-oxomorpholin-4-yl)ethoxy]-6-[(vinylcarbonyl)amino]quinazoline, 4-[(3-chloro-4-fluorophenyl)amino]-6-[(4-{N-[2-(ethoxycarbonyl)ethyl]-N-[(ethoxycarbonyl)methyl]amino}-1-oxo-2-buten-1-yl)amino]-7-cyclopropyl-methoxyquinazoline, 4-[(R)-(1-phenylethyl)amino]-6-{[4-(morpholin-4-yl)-1-oxo-2-buten-1-yl]amino}-7-cyclopropylmethoxyquinazoline, and 4-[(3-chloro-4-fluorophenyl)amino]-6-[3-(morpholin-4-yl)propyloxy[-7-methoxyquinazoline. Any reference to the abovementioned EGFR-kinase inhibitors also includes, within the scope of the present invention, a reference to any pharmacologically acceptable acid addition salts thereof which may exist. By the physiologically or pharmacologically acceptable acid addition salts thereof which may be formed by the EGFR-kinase inhibitors are meant, for example, pharmaceutically acceptable salts selected from among the salts of hydrochloric acid, hydrobromic acid, sulfuric acid, phosphoric acid, methanesulfonic acid, acetic acid, fumaric acid, succinic acid, lactic acid, citric acid, tartaric acid, and maleic acid. According to the invention the salts of the EGFR-kinase inhibitors selected from among the salts of acetic acid, hydrochloric acid, hydrobromic acid, sulfuric acid, phosphoric acid and methanesulfonic acid are preferred.

[0172] Particularly preferred examples of p38 kinase inhibitors which may be used according to the invention as a combination with the compounds of formula 1 include, in particular, 1-[5-tert-butyl-2-p-tolyl-2H-pyrazol-3-yl]-3-[4-(2-morpholin-4-ylethoxy)naphthalin-1-yl]urea; 1-[5-tert-butyl-2-p-tolyl-2H-pyrazol-3-yl]-3-[4-(2-(1-oxothiomorpholin-4-yl)ethoxy)naphthalin-1-yl]urea; 1-[5-tert-butyl-2-(2-methylpyridin-5-yl)-2H-pyrazol-3-yl[-3-[4-(2-pyridine-4-ylethoxy)naphthalin-1-yl]urea; 1-[5-tert-butyl-2-(2-methoxypyridin-5-yl)-2H-pyrazol-3-yl]-3-[4-(2-morpholin-4-ylethoxy)naphthalin-1-yl]urea, or 1-[5-tert-butyl-2-methyl-2H-pyrazol-3-yl]-3-[4-(2-morpholin-4-ylethoxy)naphthalen-1-yl]urea. Any reference to the abovementioned p38-kinase inhibitors also includes, within the scope of the present invention, a reference to any pharmacologically acceptable acid addition salts thereof which may exist. By the physiologically or pharmacologically acceptable acid addition salts thereof which may be formed by the p38 kinase inhibitors are meant, for example, pharmaceutically acceptable salts selected from among the salts of hydrochloric acid, hydrobromic acid, sulfuric acid, phosphoric acid, methanesulfonic acid, acetic acid, fumaric acid, succinic acid, lactic acid, citric acid, tartaric acid, and maleic acid.

[0173] If the compounds of formula 1 are used in conjunction with other active substances, the combination with steroids, PDE-IV inhibitors, or betamimetics is particularly preferred, of the categories of compounds mentioned above. The combination with betamimetics, particularly with long-acting betamimetics, is of particular importance. The combination of the compounds of formula 1 according to the invention with salmeterol or formoterol is particularly preferred.

[0174] Suitable preparations for administering the salts of formula 1 include, for example, tablets, capsules, suppositories, and solutions, etc. Administration of the compounds according to the invention by inhalation is of particular importance according to the invention (particularly for treating asthma or COPD). The content of the pharmaceutically active compound(s) should be in the range from 0.05 to 90 wt.-%, preferably 0.1 to 50 wt.-% of the composition as a whole. Suitable tablets may be obtained, for example, by mixing the active substance(s) with known excipients, for example, inert diluents such as calcium carbonate, calcium phosphate or lactose, disintegrants such as corn starch or alginic acid, binders such as starch or gelatine, lubricants such as magnesium stearate or talc and/or agents for delaying release, such as carboxymethyl cellulose, cellulose acetate phthalate, or polyvinyl acetate. The tablets may also comprise several layers.

[0175] Coated tablets may be prepared accordingly by coating cores produced analogously to the tablets with substances normally used for tablet coatings, for example, collidone or shellac, gum arabic, talc, titanium dioxide or sugar. To achieve delayed release or prevent incompatibilities, the core may also consist of a number of layers. Similarly, the tablet coating may consist of a number or layers to achieve delayed release, possibly using the excipients mentioned above for the tablets.

[0176] Syrups or elixirs containing the active substances or combinations thereof according to the invention may additionally contain a sweetener such as saccharine, cyclamate, glycerol, or sugar and a flavor enhancer, e.g., a flavoring such as vanillin or orange extract. They may also contain suspension adjuvants or thickeners such as sodium carboxymethyl cellulose, wetting agents such as, for example, condensation products of fatty alcohols with ethylene oxide, or preservatives such as p-hydroxybenzoates.

[0177] Solutions are prepared in the usual way, e.g., with the addition of isotonic agents, preservatives such as p-hydroxybenzoates or stabilizers such as alkali metal salts of ethylenediaminetetraacetic acid, optionally using emulsifiers and/or dispersants, while if water is used as diluent, for example, organic solvents may optionally be used as solubilizers or dissolving aids, and the solutions may be transferred into injection vials or ampoules or infusion bottles.

[0178] Capsules containing one or more active substances or combinations of active substances may for example be prepared by mixing the active substances with inert carriers such as lactose or sorbitol and packing them into gelatine capsules.

[0179] Suitable suppositories may be made for example by mixing with carriers provided for this purpose, such as neutral fats or polyethyleneglycol or the derivatives thereof.

[0180] Excipients which may be used include, for example, water, pharmaceutically acceptable organic solvents such as paraffins (e.g., petroleum fractions), vegetable oils (e.g., groundnut or sesame oil), mono- or polyfunctional alcohols (e.g., ethanol or glycerol), carriers such as, e.g., natural mineral powders (e.g., kaolins, clays, talc, and chalk), synthetic mineral powders (e.g., highly dispersed silicic acid and silicates), sugars (e.g., cane sugar, lactose, and glucose), emulsifiers (e.g., lignin, spent sulfite liquors, methylcellulose, starch, and polyvinylpyrrolidone) and lubricants (e.g., magnesium stearate, talc, stearic acid, and sodium lauryl sulfate).

[0181] For oral use the tablets may obviously contain, in addition to the carriers specified, additives such as sodium citrate, calcium carbonate and dicalcium phosphate together with various additional substances such as starch, preferably potato starch, gelatin, and the like. Lubricants such as magnesium stearate, sodium lauryl sulfate, and talc may also be used to produce the tablets. In the case of aqueous suspensions, the active substances may be combined with various flavor enhancers or colorings in addition to the abovementioned excipients.

[0182] When the compounds of formula 1 are used for the treatment of asthma or COPD they are preferably administered as preparations or pharmaceutical formulations for inhalation. For inhalation, the compounds may be in the form of inhalable powders, propellant-containing metering aerosols, or propellant-free inhalable solutions. Within the scope of the present invention, the term propellant-free inhalable solutions also includes concentrates or sterile inhalable solutions ready for use. The formulations which may be used within the scope of the present invention are described in detail in the next part of the specification.

[0183] The inhalable powders which may be used according to the invention may contain the compounds 1 either on their own or in admixture with suitable physiologically acceptable excipients. If the active substances 1 are present in admixture with physiologically acceptable excipients, the following physiologically acceptable excipients may be used to prepare these inhalable powders according to the invention: monosaccharides (e.g., glucose or arabinose), disaccharides (e.g., lactose, saccharose, or maltose), oligo- and polysaccharides (e.g., dextrane), polyalcohols (e.g., sorbitol, mannitol, or xylitol), salts (e.g., sodium chloride or calcium carbonate) or mixtures of these excipients with one another. Preferably, mono- or disaccharides are used, while the use of lactose or glucose is preferred, particularly, but not exclusively, in the form of their hydrates. For the purposes of the invention, lactose is the particularly preferred excipient, while lactose monohydrate is most particularly preferred.

[0184] Within the scope of the inhalable powders according to the invention, the excipients have a maximum average particle size of up to 250 μm, preferably between 10 μm and 150 μm, most preferably between 15 μm and 80 μm. It may sometimes seem appropriate to add finer excipient fractions with an average particle size of 1 μm to 9 μm to the excipients mentioned above. These finer excipients are also selected from the group of possible excipients listed hereinbefore. Finally, in order to prepare the inhalable powders according to the invention, micronised active substance 1, preferably with an average particle size of 0.5 μm to 10 μm, more preferably from 1 μm to 5 μm, is added to the excipient mixture. Processes for producing the inhalable powders according to the invention by grinding and micronizing and by finally mixing the ingredients together are known from the prior art. The inhalable powders according to the invention may be administered using inhalers known from the prior art.

[0185] The inhalation aerosols containing propellant gas which may be used according to the invention may contain the compounds 1 dissolved in the propellant gas or in dispersed form. The compounds 1 may be present in separate preparations or in a combined preparation, while the compounds 1 may either both be dissolved, both dispersed or only one component is dissolved and the other may be dispersed.

[0186] The propellant gases which may be used to prepare the inhalation aerosols are known from the prior art. Suitable propellant gases are selected from among hydrocarbons such as n-propane, n-butane, or isobutane, and halohydrocarbons such as fluorinated derivatives of methane, ethane, propane, butane, cyclopropane, or cyclobutane. The propellant gases mentioned above may be used on their own or in mixtures thereof. Particularly preferred propellant gases are fluorinated alkane derivatives selected from TG134a and TG227 and mixtures thereof.

[0187] The propellant-driven inhalation aerosols may also contain other ingredients such as cosolvents, stabilizers, surfactants, antioxidants, lubricants and pH adjusters. All these ingredients are known in the art.

[0188] The propellant-driven inhalation aerosols mentioned above may be administered using inhalers known in the art such as metered dose inhalers (MDIs).

[0189] Moreover, the active substances 1 according to the invention may be administered in the form of propellant-free inhalable solutions and suspensions. The solvent used may be an aqueous or alcoholic, preferably an ethanolic solution. The solvent may be water on its own or a mixture of water and ethanol. The relative proportion of ethanol compared with water is not limited but the maximum is up to 70 percent by volume, more particularly up to 60 percent by volume, and most preferably up to 30 percent by volume. The remainder of the volume is made up of water. The solutions or suspensions containing 1 are adjusted to a pH of 2 to 7, preferably 2 to 5, using suitable acids. The pH may be adjusted using acids selected from inorganic or organic acids. Examples of particularly suitable inorganic acids include hydrochloric acid, hydrobromic acid, nitric acid, sulfuric acid, and/or phosphoric acid. Examples of particularly suitable organic acids include ascorbic acid, citric acid, malic acid, tartaric acid, maleic acid, succinic acid, fumaric acid, acetic acid, formic acid, and/or propionic acid. Preferred inorganic acids are hydrochloric and sulfuric acids. It is also possible to use the acids which already form an acid addition salt. Of the organic acids, ascorbic acid, fumaric acid and citric acid are preferred. If desired, mixtures of the above acids may be used, particularly in the case of acids which have other properties in addition to their acidifying qualities, e.g., as flavorings, antioxidants, or complexing agents, such as citric acid or ascorbic acid, for example. According to the invention, it is particularly preferred to use hydrochloric acid to adjust the pH.

[0190] In these formulations it may be possible to do without the addition of edetic acid (EDTA) or one of the known salts thereof, sodium edetate, as stabilizer or complexing agent. Other embodiments contain these compounds. In a preferred embodiment, the content, based on sodium edetate, is less than 100 mg/100 mL, preferably less than 50 mg/100 mL, most preferably less than 20 mg/100 mL. Generally, inhalable solutions in which the content of sodium edetate is from 0 to 10 mg/100 mL are preferred. Cosolvents and/or other excipients may be added to the propellant-free inhalable solutions. Preferred cosolvents are those which contain hydroxyl groups or other polar groups, such as alcohols, particularly isopropyl alcohol, glycols, particularly propyleneglycol, polyethyleneglycol, polypropyleneglycol, glycol ether, glycerol, polyoxyethylene alcohols, and polyoxyethylene fatty acid esters. By excipients and additives are meant, in this context, any pharmacologically acceptable substance which is not an active substance, but can be formulated together with the active substance(s) in the pharmacologically suitable solvent to improve the qualitative properties of the active substance formulation. Preferably, these substances have no noticeable or at least no unwanted pharmacological activity in the context of the desired therapy. The excipients and additives include, e.g., surfactants such as soya lecithin, oleic acid, sorbitan esters such as polysorbates, polyvinylpyrrolidone, other stabilizers, complexing agents, antioxidants, and/or preservatives which guarantee or extend the shelf life of the finished pharmaceutical formulation, flavorings, vitamins and/or other additives known in the art. The additives also include pharmacologically acceptable salts such as for example sodium chloride as isotonic agents.

[0191] The preferred excipients include antioxidants, such as, for example, ascorbic acid, unless already used to adjust the pH, vitamin A, vitamin E, tocopherols, and similar vitamins or provitamins which occur in the human body.

[0192] Preservatives may be used to protect the formulation from contamination with pathogens. Suitable preservatives are those known in the art, particularly cetylpyridinium chloride, benzalkonium chloride, or benzoic acid or benzoates such as sodium benzoate in the concentration known from the prior art. The abovementioned preservatives are preferably present in concentrations of up to 50 mg/100 mL, most preferably between 5 and 20 mg/100 mL.

[0193] Preferred formulations contain only benzalkonium chloride and sodium edetate, in addition to the solvent water and the active substance 1. In another preferred embodiment, no sodium edetate is used.

[0194] The dosage of the compounds according to the invention is naturally highly dependent on the method of administration and the complaint which is being treated. When administered by inhalation the compounds of formula 1 are characterized by a high potency even at doses in the μg range. The compounds of formula 1 may also be used effectively above the μg range. The dosage may then be in the gram range, for example.

[0195] When administered by routes other than by inhalation the compounds according to the invention may be administered in higher doses (for example, but not restrictively, in the range from 1 to 1000 mg).

[0196] The following examples of formulations illustrate the present invention without restricting its scope:

Examples of Pharmaceutical Formulations

[0197]

1

A. Tablets Containing 100 mg of Active Substance

Component
Amount per tablet (mg)

active substance 1
100

lactose
140

corn starch
240

polyvinylpyrrolidone
15

magnesium stearate
5

TOTAL
500

[0198] The finely ground active substance, lactose, and some of the corn starch are mixed together. The mixture is screened, then moistened with a solution of polyvinylpyrrolidone in water, kneaded, wet-granulated, and dried. The granules, the remaining corn starch and the magnesium stearate are screened and mixed together. The mixture is compressed to produce tablets of suitable shape and size.

2B. Tablets Containing 80 mg of Active SubstanceComponentAmount per tablet (mg)active substance 180lactose55corn starch190microcrystalline cellulose35polyvinylpyrrolidone15sodium-carboxymethyl starch23magnesium stearate2TOTAL400

[0199] The finely ground active substance, some of the corn starch, lactose, microcrystalline cellulose, and polyvinylpyrrolidone, are mixed together, the mixture is screened and worked with the remaining corn starch and water to form a granulate which is dried and screened. The sodium carboxymethyl starch and the magnesium stearate are added and mixed in and the mixture is compressed to form tablets of a suitable size.

3C. Ampoule Solution Containing 50 mg of Active SubstanceComponentAmountactive substance 150.0mgsodium chloride50mgwater for inj.5mL

[0200] The active substance is dissolved in water at its own pH or optionally at pH 5.5 to 6.5 and sodium chloride is added to make the solution isotonic. The resulting solution is filtered to remove pyrogens and the filtrate is transferred under aseptic conditions into ampoules which are then sterilized and heat-sealed. The ampoules contain 5 mg, 25 mg, and 50 mg of active substance.

4D. Metering AerosolComponentAmountactive substance 10.005sorbitan trioleate0.1 monofluorotrichloromethanead 100and difluorodichloromethane (2:3)

[0201] The suspension is transferred into a conventional aerosol container with metering valve. Preferably 50 μL suspension are released on each actuation. The active substance may also be released in higher doses if desired (e.g., 0.02 wt.-%).

5E. SolutionComponentmg/100 mLactive substance 1333.3formoterol fumarate333.3benzalkonium chloride 10.0EDTA 50.0HCl (1 N)to pH 3.4

[0202] This solution may be prepared in the usual way.

6F. Inhalable PowderComponentAmountactive substance 16μgformoterol fumarate6μglactose monohydrateto 25mg

[0203] The inhalable powder is prepared in the usual way by mixing the individual ingredients.

7G. Inhalable PowderComponentAmountactive substance 110μglactose monohydrateto 25mg

[0204] The inhalable powder is prepared in the usual way by mixing the individual ingredients.

Anticholinergics, processes for the preparation thereof, and pharmaceutical compositions

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