申请人:Fisons Limited
公开号:US03933844A1
公开(公告)日:1976-01-20
There are described compounds of formula I, ##SPC1## in which R.sub.5, r.sub.6, r.sub.7 and R.sub.8, which may be the same or different, are hydrogen, alkyl, halogen, hydroxy, alkenyl, phenyl, alkenyloxy, aralkyl, acyloxy or alkoxy; the alkoxy optionally being substituted by alkoxy, hydroxy, or a heterocyclic ring containing carbon and oxygen; the alkyl, alkenyl and alkoxy groups containing from 1 to 8 carbon atoms, and W is oxygen or sulphur, And pharmaceutically acceptable derivatives thereof. Certain of the compounds in which W is oxygen are excluded. The compounds of formula I are indicated for use in the treatment of asthma, and pharmaceutical compositions containing them and processes for their preparation are also described.
本文描述了化合物I的公式,其中R.sub.5、r.sub.6、r.sub.7和R.sub.8可以相同也可以不同,它们可以是氢、烷基、卤素、羟基、烯基、苯基、烯氧基、芳基烷基、酰氧基或烷氧基;烷氧基可以选用含有碳和氧的杂环环,烷基、烯基和烷氧基含有1至8个碳原子,W是氧或硫,其药学上可接受的衍生物。其中W为氧的某些化合物被排除在外。公式I的化合物适用于哮喘的治疗,并描述了包含它们的制药组合物和制备它们的过程。