申请人:Sawai Pharmaceutical Co., Ltd.
公开号:US04879295A1
公开(公告)日:1989-11-07
Compounds of the formula: ##STR1## wherein A is a C.sub.1-6 alkyl group, an aryl group which is unsubstituted or substituted with at least one substituent selected from hydroxy, alkoxy, aryl-(C.sub.1-6)alkoxy, C.sub.1-6 alkylcarbonyloxy, halo-(C.sub.1-6)alkyl, halogen, nitro and amino, or 5- or 6-membered heterocyclic group containing at least one hetero atom selected from oxygen, nitrogen and sulfur, or a condensed heterocyclic group consisting of a heterocycle as defined above and a benzene nucleus, these two heterocyclic groups being unsubstituted or substituted with at least one substituent selected from hydroxy, C.sub.1-6 alkyl and halogen, and R is hydrogen or a C.sub.1-6 alkyl group, or a pharmaceutically acceptable salt thereof are nobel and useful as antiallergic.
公式为:##STR1## 其中A是C.sub.1-6烷基,苯基,未取代或取代至少一个取代基,所选取代基包括羟基,烷氧基,芳基-(C.sub.1-6)烷氧基,C.sub.1-6烷基羰氧基,卤代-(C.sub.1-6)烷基,卤素,硝基和氨基,或者是含有至少一个氧,氮和硫杂原子的5-或6元杂环基,或者是由上述定义的杂环和苯环组成的紧缩杂环基,这两个杂环基未取代或取代至少一个取代基,所选取代基包括羟基,C.sub.1-6烷基和卤素,R是氢或C.sub.1-6烷基,或其药学上可接受的盐,这些化合物是抗过敏的,具有新颖性和实用性。