申请人:Fisons plc
公开号:US04670452A1
公开(公告)日:1987-06-02
There are provided benzopyrans of formula I ##STR1## wherein R.sub.6 and R.sub.7 together form the chain --CHOCH.dbd.(A.sub.1 E.sub.1)--O-- in which --O-- is attached to R.sub.7, R.sub.5 represents hydrogen, R.sub.8 represents propyl, A represents a single bond, A.sub.1 represents a single bond, phenylene or (CH.sub.2).sub.m, m represents an integer from 1 to 10 inclusive, E and E.sub.1, which may be the same or different, independently represent --COOH, 5H-tetrazolyl, or CONR.sub.24 R.sub.25, wherein R.sub.24 and R.sub.25, which may be the same or different, represent hydrogen or alkyl of C.sub.1 to C.sub.6 ; provided that when A.sub.1 represents a single bond, then E.sub.1 represents 5H-tetrazolyl or CONR.sub.24 R.sub.25, and their pharmaceutically acceptable salts, all of which are useful as anti-asthmatics.
提供了具有以下结构的苯并吡喃化合物:其中R.sub.6和R.sub.7共同形成链--CHOCH.dbd.(A.sub.1 E.sub.1)--O--,其中--O--连接到R.sub.7,R.sub.5代表氢,R.sub.8代表丙基,A代表单键,A.sub.1代表单键,苯基或(CH.sub.2).sub.m,m为1至10的整数,E和E.sub.1可能相同也可能不同,独立代表--COOH,5H-四唑基,或CONR.sub.24 R.sub.25,其中R.sub.24和R.sub.25可能相同也可能不同,代表氢或C.sub.1到C.sub.6的烷基;只要A.sub.1代表单键,那么E.sub.1代表5H-四唑基或CONR.sub.24 R.sub.25,以及它们的药用盐,这些化合物可用作抗哮喘药。