Patent EP-0173516-B1 (EP)
Inventor: TODA MASAAKI
IPC: A61K31/41
Filed: 1985-08-15
Granted: 1993-12-01
Abstract: An aminophenyl derivative of the general formula: <CHEM> [wherein symbol A represents a single bond or a methylene, ethylene, trimethylene, tetramethylene, vinylene, propenylene, butenylene, butadienylene or ethylene group optionally substituted by one, two or three straight or branched alkyl group(s) of from 1 to 10 carbon atom(s) and/or phenyl group(s),     symbol B represents a divalent group of formula: <CHEM>     symbol T represents an oxygen atom or a sulphur atom,     R<1> represents a group of formula:     (i) <CHEM>     (ii) <CHEM>     (iii) <CHEM>  or (iv) a straight or branched alkyl, alkenyl or alkynyl group of from 1 to 20 carbon atom(s), (wherein R<5> and R<6> independently represent a hydrogen atom or a halogen atom or a straight or branched alkyl, alkenyl or alkynyl group of from 1 to 20 carbon atom(s) wherein one, two, three, four or five of the carbon atom(s) may be replaced by oxygen atom(s), sulphur atom(s), halogen atom(s), nitrogen atom(s), benzene ring(s), thiophene ring(s), naphthalene ring(s), carbocyclic ring(s) of from 4 to 7 carbon atom(s), carbonyl group(s), carbonyloxy group(s), hydroxy group(s), carboxy group(s), azido group(s) and/or nitro group(s)), R<2> represents a hydrogen atom or a straight or branched alkyl group of from 1 to 6 carbon atom(s), R<3> represents a hydrogen atom, a halogen atom, a hydroxy group, a nitro group, a group of general formula: -COOR<7> (wherein R<7> represents a hydrogen atom or a straight or branched alkyl group of from 1 to 6 carbon atom(s)) or a straight or branched alkyl or branched alkyl, alkoxy or alkylthio group of from 1 to 6 carbon atom(s), and     R<4> represents a group of general formula:    -(CH2)s-COOR<8> or <CHEM> (wherein R<8> represents a hydrogen atom or a straight or branched chain alkyl group of from 1 to 6 carbon atoms, s represents an integer of from 1 to 10, and q represents zero or an integer of from 1 to 10),     ; or a non-toxic salt thereof, with the proviso that compounds of the following general formula are excluded: <CHEM> [wherein the symbol A' is a single bond or a vinylene or ethylene group optionally substituted by straight or branched chain alkyl group(s) of from 1 to 4 carbon atoms, R<4'> is -(CH2)n-COOR<8> (wherein R<8> is as defined above and n is an integer of from 1 to 10), R<3'> is a hydrogen atom, halogen atom or straight or branched alkyl or alkoxyl group of from 1 to 4 carbon atoms, and  R<1'> is     (i) a group of the general formula: <CHEM> (wherein R<5'> and R<6'> are hydrogen atom(s), hydroxy group(s), halogen atom(s), trifluoromethyl group(s), straight or branched alkyl, alkenyl, alkynyl, alkoxy, alkenyloxy, alkynyloxy or acyloxy group(s) of from 1 to 4 carbon atom(s) or cycloalkyl group(s) of from 3 to 6 carbon atoms, independently),   (ii) a group of the general formula: <CHEM>  (wherein R<5'> and R<6'> are as defined above), or (iii) an unsubstituted naphthyl group] possess an inhibitory on 5 alpha -reductase and are therefore useful for the prevention and/or treatment for diseases induced by 5 alpha -reductase in mammals, especially human beings.