申请人:Boehringer Ingelheim GmbH
公开号:US04238496A1
公开(公告)日:1980-12-09
Compounds of the formula ##STR1## wherein R.sub.1 is hydrogen or alkyl of 1 to 4 carbon atoms; R.sub.2 is hydrogen, methyl or carboxyl; and A is pyridyl, benzodioxanyl or ##STR2## where R.sub.3, R.sub.4 and R.sub.5, which may be identical to or different from each other, are each hydrogen, hydroxyl, alkoxy, alkyl, halogen, carboxyalkyl or nitro, or one of R.sub.3, R.sub.4 or R.sub.5 is dialkylamino, carboxamido, morpholino, piperidino, hydroxy-piperidino, cyano or phenyl; non-toxic salts thereof formed with an inorganic base when R.sub.1 is hydrogen and/or R.sub.2 is carboxyl; and non-toxic addition salts thereof formed with an organic base when R.sub.1 is hydrogen. The compounds are useful as antiallergics.
式子为##STR1##的化合物,其中R.sub.1是氢或1至4个碳原子的烷基;R.sub.2是氢、甲基或羧基;而A是吡啶基、苯并二氧杂环基或##STR2##,其中R.sub.3、R.sub.4和R.sub.5,可以相同也可以不同,分别是氢、羟基、烷氧基、烷基、卤素、羧基烷基或硝基,或者R.sub.3、R.sub.4或R.sub.5中的一个是双烷基氨基、羧酰胺、吗啉基、哌啶基、羟基哌啶基、氰基或苯基;当R.sub.1为氢和/或R.sub.2为羧基时,与无机碱形成的无毒盐;当R.sub.1为氢时,与有机碱形成的无毒加合盐。这些化合物可用作抗过敏药物。