Patent EP-0023569-A1 (EP)
Inventor: GRISS GERHART DR DIPL-CHEM
IPC: C07D223/16
Filed: 1980-06-28
Abstract: 1. Claims (for the Contracting States : BE, CH, DE, FR, GB, IT, LI, LU, NL, SE) Carboxylic acid amides of general formula I  see diagramm : EP0023569,P97,F1  wherein R represents a hydrogen, chlorine or bromine atom or a cyclic alkyleneimino group with 4 to 7 carbon atoms in the imino ring ; R1 represents a hydrogen, fluorine, chlorine or bromine atom ; an alkyl or alkoxy group with 1 to 6 carbon atoms ; an alkoxy group with 1 to 3 carbon atoms substituted by a phenyl group ; a hydroxy, nitro, amino, cyano or carboxy group ; an alkanoylamino, alkoxycarbonyl or dialkylamidosulphonyl group, wherein the alkyl part may contain 1 to 3 carbon atoms ; R2 and R3 , which may be the same or different, represent alkyl groups with 1 to 7 carbon atoms, alkenyl groups with 3 to 7 carbon atoms, cycloalkyl groups with 3 to 7 carbon atoms, alkyl groups with 1 to 3 carbon atoms substituted by a phenyl group, or phenyl or adamantyl groups, or R2 and R3 together with the nitrogen atom between them represent an unbranched alkyleneimino group with 3 to 12 carbon atoms in the imino ring, an unbranched alkyleneimino group with 4 to 6 carbon atoms in the imino ring which may be substituted by one or two alkyl groups each with 1 to 4 carbon atoms, an alkoxy group with 1 to 3 carbon atoms, a hydroxy, phenyl, carboxy or alkoxycarbonyl group with a total of 2 to 4 carbon atoms and/or wherein a methylene group is replaced by an imino group (which may be substituted by an alkyl group with 1 to 3 carbon atoms, an alkoxycarbonyl group with a total of 2 to 4 carbon atoms, a phenyl, halophenyl, benzyl, pyridyl or furoyl group), by an oxygen or sulphur atom or by a carbonyl, sulphoxide or sulphonyl group ; a saturated or partially unsaturated azabicycloalkyl group with 7 to 10 carbon atoms, a piperidino group substituted in the 3- and 5-positions by a total of 3 or 4 alkyl groups each with 1 to 3 carbon atoms ; a 1,4-dioxa-8-aza-spiroalkyl group with 6 to 9 carbon atoms, or a pyrrolyl or tetrahydropyridino group ; R4 represents a hydrogen atom or an alkyl group with 1 to 3 carbon atoms ; Y represents an oxygen atom, an imino group or a methylene group optionally substituted by one or two alkyl groups each having 1 to 3 carbon atoms, Z represents a hydrogen or halogen atom, a carboxy, cyano, formyl, hydroxymethyl, hydroxycarbonylethylene, nitro, amino, allyloxycarbonyl, phenoxycarbonyl, benzyloxycarbonyl or phenylethoxycarbonyl group, an alkoxycarbonyl group with a total of 2 to 8 carbon atoms, a cycloalkoxycarbonyl group with a total of 4 to 8 carbon atoms, a methyl group optionally substituted by 2 or 3 alkoxy groups or by a carboxy, alkoxycarbonyl or ethylenedioxy group, wherein the alkoxy group may contain 1 to 3 carbon atoms ; an acetyl group, optionally substituted by a carboxy group or alkoxycarbonyl group with a total of 2 to 4 carbon atoms ; an ethyl or ethylene group substituted by one or two alkoxycarbonyl groups each having a total of 2 to 4 carbon atoms, or by two carboxy groups ; an aminocarbonyl group optionally mono- or di-substituted by an alkyl group with 1 to 7 carbon atoms, a cycloalkyl group with 3 to 7 carbon atoms and/or an alkenyl group with 3 to 7 carbon atoms ; a piperidinocarbonyl, morpholinocarbonyl, thiomorpholinocarbonyl or N-alkyl-piperazinocarbonyl group wherein the alkyl group may contain 1 to 3 carbon atoms ; or an ethyl group substituted by a carboxy group if the groups R2 and R3 together with the nitrogen atom between them represent one of the above-mentioned cyclic imino groups, and the physiologically acceptable salts thereof with inorganic or organic acids and also bases if Z represents or contains a carboxy group. 1. Claims (for the Contracting State AT) Process for the preparation of new carboxylic acid amides of general formula I  see diagramm : EP0023569,P104,F1  wherein R represents a hydrogen, chlorine or bromine atom or a cyclic alkyleneimino group with 4 to 7 carbon atoms in the imino ring ; R1 represents a hydrogen, fluorine, chlorine or bromine atom ; an alkyl or alkoxy group with 1 to 6 carbon atoms ; an alkoxy group with 1 to 3 carbon atoms substituted by a phenyl group ; a hydroxy, nitro, amino, cyano or carboxy group ; an alkanoylamino, alkoxycarbonyl or dialkylamido-sulphonyl group, wherein the alkyl part may contain 1 to 3 carbon atoms ; R2 and R3 , which may be the same or different, represent alkyl groups with 1 to carbon atoms, alkenyl groups with 3 to 7 carbon atoms, cycloalkyl groups with 3 to 7 carbon atoms, alkyl groups with 1 to 3 carbon atoms substituted by a phenyl group, or phenyl or adamantyl groups, or R2 and R3 together with the nitrogen atom between them represent an unbranched alkyleneimino group with 3 to 12 carbon atoms in the imino ring, an unbranched alkyleneimino group with 4 to 6 carbon atoms in the imino ring which may be substituted by one or two alkyl groups each with 1 to 4 carbon atoms, an alkoxy group with 1 to 3 carbon atoms, a hydroxy, phenyl, carboxy or alkoxycarbonyl group with a total of 2 to 4 carbon atoms and/or wherein a methylene group is replaced by an imino group (which may be substituted by an alkyl group with 1 to 3 carbon atoms, an alkoxycarbonyl group with a total of 2 to 4 carbon atoms, a phenyl, halophenyl, benzyl, pyridyl or furoyl group), by an oxygen or sulphur atom or by a carbonyl, sulphoxide or sulphonyl group ; with 7 to 10 carbon atoms, a piperidino group substituted in the 3- and 5-positions by a total of 3 or 4-alkyl groups each with 1 to 3 carbon atoms ; a 1,4-dioxa-8-aza-spiroalkyl group with 6 to 9 carbon atoms, or a pyrrolyl or tetrahydropyridino group ; R4 represents a hydrogen atom or an alkyl group with 1 to 3 carbon atoms ; Y represents an oxygen atom, an imino group or a methylene group optionally substituted by one or two alkyl groups each having 1 to 3 carbon atoms, Z represents a hydrogen or halogen atom, a carboxy, cyano, formyl, hydroxymethyl, hydroxycarbonylethylene, nitro, amino, allyloxycarbonyl, phenoxycarbonyl, benzyloxycarbonyl or phenylethoxycarbonyl group, an alkoxycarbonyl group with a total of 2 to 8 carbon atoms, a cycloalkoxycarbonyl group with a total of 4 to 8 carbon atoms, a methyl group optionally substituted by 2 or 3 alkoxy groups or by a carboxy, alkoxycarbonyl or ethylene-dioxy group, wherein the alkoxy group may contain 1 to 3 carbon atoms ; an acetyl group, optionally substituted by a carboxy group or alkoxycarbonyl group with a total of 2 to 4 carbon atoms ; an ethyl or ethylene group substituted by 1 or two alkoxycarbonyl groups each having a total of 2 to 4 carbon atoms, or by two carboxy groups ; an aminocarbonyl group optionally mono- or di-substituted by an alkyl group with 1 to 7 carbon atoms, a cycloalkyl group with 3 to 7 carbon atoms, a cycloalkyl group with 3 to 7 carbon atoms and/or an alkenyl group with 3 to 7 carbon atoms ; a piperidinocarbonyl, morpholinocarbonyl, thiomorpholinocarbonyl or N-alkyl-piperazinocarbonyl group wherein the alkyl group may contain 1 to 3 carbon atoms ; or an ethyl group substituted by a carboxy group if the groups R2 and R3 together with the nitrogen atom between them represent one of the above-mentioned cyclic imino groups, and the physiologically acceptable salts thereof with inorganic or organic acids and also bases if Z represents or contains a carboxy group, characterised in that a) an aminobenzoic acid of general formula II  see diagramm : EP0023569,P105,F1  wherein R, R1 , R2 and R3 are as hereinbefore defined, or a reactive derivative thereof, optionally prepared in the reaction mixture, is reacted with an amine of general formula III  see diagramm : EP0023569,P105,F2  wherein R4 , Y and Z are as hereinbefore defined, or with an N-activated amine of general formula III optionally formed in the reaction mixture, if an aminobenzoic acid of general formula II is used and if Z in an N-activated amine of general formula III does not contain any carboxy or amino groups, or b) in order to prepare compounds of general formula I wherein R1 has the definitions given hereinbefore, with the exception of the hydroxy and amino group, and Y represents a methylene group optionally substituted by one or two alkyl groups each having 1 to 3 carbon atoms, a compound of general formula IV see diagramm : EP0023569,P105,F3  wherein R, R4 and Z are as hereinbefore defined, R1 and Y are defined as above and E represents a halogen atom, is reacted with an amine of general formula V  see diagramm : EP0023569,P105,F4  wherein R2 and R3 are as hereinbefore defined, or c) in order to prepare compounds of general formula I wherein Z represents a carboxy group and Y does not represent an NH group a compound of general formula VI  see diagramm : EP0023569,P105,F5  wherein R and R1 to R4 are as hereinbefore defined, Y has the meanings given hereinbefore with the exception of the NH group and A represents a group which can be converted into a carboxy group by oxidation, is oxidised or d) in order to prepare compounds of general formula I wherein Z represents a carboxy group, a compound of general formula VII  see diagramm : EP0023569,P106,F1 wherein R, R1 to R4 and Y are as hereinbefore defined and B represents a group which can be converted into a carboxy group by hydrolysis, is hydrolysed, or e) in order to prepare compounds of general formula I wherein R2 represents an alkyl group with 1 to 7 carbon atoms, a cycloalkyl group with 3 to 7 carbon atoms, an alkyl group with 1 to 3 carbon atoms substituted by a phenyl group, or an alkenyl group with 3 to 7 carbon atoms, R3 represents an alkyl group with 1 to 7 carbon atoms, a cycloalkyl group with 3 to 7 carbon atoms, an alkenyl group with 3 to 7 carbon atoms, an alkyl group with 1 to 3 carbon atoms substituted by a phenyl group, or an adamantyl group, or R2 and R3 together with the nitrogen atom between them represent a 5- to 7-membered alkyleneimino ring, a piperidino group