2-Azetidinone derivatives.

摘要

2-Azetizinone derivatives, useful as blood platelet aggregation inhibiting agents, are those of the formula: in which R<1> is a halogen atom a C1-C4 alkyl group, a C1-C4 alkoxy group or an alkoxycarbonyl group in which the alkoxy group is a C1-C4 alkoxy group; R<2> is a group of the formula: (in which R<3> and R<4> are the same or different and each is a hydrogen atom, a C1-C5 alkenyl group, a phenyl group or a benzyl group), a group of the formula: (in which R<5> is a hydrogen atom, a phenyl group substituted by a halogen atom or a C1-C4 alkoxy group, a phenyl group, a C1-C4 alkyl group or a pyridyl group), a group of the formula: (in which R<6> is a hydrogen atom, a C1-C4 alkyl group or a benzyl group and R<7> is a hydrogen atom or a C1-C4 alkyl group), a group of the formula: (in which R<8> and R<9> are the same or different and each is a hydrogen atom or C1-C4 alkyl group), a pyrrolidinyl group or a tetrahydroazepinyl group; and n is an integer of from 2 to 10; and salts thereof.