Patent GB-1325528-A (GB)
Title: Aminophenylcycloamidine derivatives their production and their medicinal use
IPC: C07D211/00
Filed: 1971-06-11
Abstract: 1325528 Aminophenyl - cycloamidine derivatives BAYER AG 11 June 1971 [13 June 1970] 27494/71 Heading C2C Novel aminophenyl-cycloamidine derivatives (1) wherein R is a hydrogen atom or a straight or branched chain alkyl, alkenyl or alkynyl group, which can be substituted by a halogen atom or an alkoxy or hydroxy group; R<SP>2</SP> is a -COR<SP>4</SP> or -SO 2 R<SP>5</SP> group [in which R<SP>4</SP> is a hydrogen atom; a straight or branched chain alkyl, alkenyl, alkynyl, alkoxy, alkenyloxy, alkynyloxy, alkoxyalkoxy, alkoxyalkyl or alkoxy group, which can be substituted by a chlorine atom or by a hydroxy, cyano or oxo group; a cycloalkyl group or a cycloalkenyl group containing one or two double bonds, which groups can be substituted by one or more alkyl groups; a cycloalkylalkyl, tetrahydrofurfuryl, tetrahydrofuryl or tetrahydropyranyl group which can be substituted by one or more alkyl groups; a trifluoromethyl group; a carbalkoxyalkyl group; a cycloalkylalkoxy, cycloalkoxy, or tetrahydrofurylalkoxy group; a phenalkoxy, phenoxyalkoxy, phenoxy, phenylalkyl, phenyl or naphthyl group, the aromatic ring of which can be substituted by one or more alkyl, alkenyl, alkoxy, nitro, trifluoromethyl, cyano, alkylsulphonyl, acylamino and/or alkylsulphonylamino groups and/or halogen atoms; or a heteroaromatic O- and/or N-containing ring system; R<SP>5</SP> is a straight or branched chain alkyl or alkenyl group; a cycloalkyl group; a phenylalkyl, phenyl or naphthyl group, the aromatic ring of which can be substituted by one or more alkyl, alkenyl, alkoxy, nitro, trifluoromethyl, cyano, acylamino, alkylsulphonyl and/or alkylsulphonylamino groups and/or chlorine, bromine or fluorine atoms]; R<SP>3</SP>, R<SP>7</SP> and R<SP>8</SP>, which can be the same or different, are each a hydrogen or halogen atom or a straight or branchedchain alkyl, alkenyl or alkoxy group or a cyano or trifluoromethyl group; R<SP>6</SP> and R<SP>9</SP>, which can be the same or different, are each a hydrogen atom or an alkyl group; and n is 3, 4 or 5; and salts thereof may be prepared by (a) reacting a compound (3) with a lactam or thiolactam (4) in which W is oxygen or sulphur, or with a salt or a reactive derivative thereof especially a lactam; (b) reacting an imide chloride (6) with an amine RNH 2 ; (c) reacting an arylisocyanate (8)  with a lactam (9) (d) reacting a carbamic acid chloride (10) with a lactam (9); (e) alkylating a compound (1) in which R is hydrogen with B-R in which B is a reactive ester group or a halogen, and R is as above except hydrogen; or (f) reacting an aminophenyl-cyclo-amidine (13) with an acylating or sulphonating agent R<SP>2</SP>Y where Y is a reactive ester group. The intermediate 2-(4-aminophenyl-imino)-1- methyl-pyrrolidine may be prepared by catalytic hydrogenation of 2 - (4 - nitrophenylimino)- 1-methyl pyrrolidine. Other listed intermediates may be prepared by known methods. Pharmaceutical compositions of the compounds (1) show parasiticide, especially antihelminthic, activity and some have antihypertensive activity when administered orally or parenterally alone or with the usual excipients.