申请人:Kowa Co., Ltd.
公开号:US04898876A1
公开(公告)日:1990-02-06
A benzopylpiperazine ester of the following formula: ##STR1## wherein A represents a single bond or an alkylene group, vinylene group, --O--alkylene group or methine group, R.sub.1 represents a bicyclic carbon ring residue which may be substituted with a lower alkyl group, lower alkoxy group, oxo group or nitro group or a halogen atom, or may be partially saturated; a fluorene residue which may contain an oxo group; a fluorenylidene group; an anthracene residue; a phenanthrene residue which may be substituted with a lower alkyl group, or may be partially saturated; a benzofuran residue or thianaphthene residue which may be substituted with a lower alkyl group or lower alkoxy group; a benzopyran residue or benzoazine residue which may be substituted with an oxo group or phenyl group and partially saturated; a phthalimide residue; a benzodiazine residue; an isozazole residue which may be substituted with a lower alkyl group or phenyl group; or an alkylene dioxybenzene residue or xanthene residue; and R.sub.2 represents an alkyl group, cycloalkyl group, cycloalkylalkyl group or aralkyl group, excepting the case where A is a single bond, R.sub.1 is ##STR2## and R.sub.2 is a methyl group, exhibits excellent chymotrypsin inhibitive activity.
下列化合物的苯并哌嗪酯化物式:##STR1## 其中,A代表单键或烷基、乙烯基、--O--烷基或甲基基团,R.sub.1代表一个双环碳环残基,可以被低烷基、低氧基、氧代基或硝基或卤素原子取代,或者部分饱和;一个含氧代基的芴环残基;一个芴亚甲基基团;一个蒽环残基;一个苯并并芘环残基,可以被低烷基取代,或者部分饱和;一个苯并呋喃环残基或噻萘环残基,可以被低烷基或低氧基取代;一个苯并吡喃环残基或苯并嗪环残基,可以被氧代基或苯基取代并部分饱和;一个邻苯二甲酰亚胺残基;一个苯并二氮杂环残基;一个噻唑杂环残基,可以被低烷基或苯基取代;或者一个烷基双氧基苯环残基或黄色素环残基;R.sub.2代表烷基、环烷基、环烷基烷基或芳基烷基,除非A是单键,R.sub.1是##STR2##,R.sub.2是甲基基团,否则展现出出色的胰蛋白酶抑制活性。