申请人:Hoffmann-La Roche Inc.
公开号:US05001140A1
公开(公告)日:1991-03-19
The invention relates to compounds of the formula: ##STR1## wherein R is hydrogen or lower alkyl, R.sub.1, R.sub.2, R.sub.3 and R.sub.4, independently, are hydrogen, lower alkyl, lower alkenyl, cycloalkyl or phenyl unsubstituted or substituted by up to 3 substituents independently selected from lower alkyl, lower alkoxy or halogen, or R.sub.1 and R.sub.2 taken together with the carbon atom are alkylene of 2 to 5 carbon atoms unsubstituted or substituted by lower alkyl, and n is an integer of from 0 to 3, and, when R.sub.1 is different from R.sub.2 and/or when R.sub.3 is different from R.sub.4, enantiomers, diastereomers and racemates thereof and, when R is hydrogen, salts thereof with pharmaceutically acceptable bases. The compounds of formula I and, when R is hydrogen, pharmaceutically exceptable salts thereof are useful as bronchopulmonary agents, for example, in the relief of asthma and allergic reactions.
本发明涉及公式为:##STR1##的化合物,其中R为氢或低碳基,R.sub.1、R.sub.2、R.sub.3和R.sub.4独立地为氢、低碳基、低烯基、环烷基或苯基,未取代或取代1至3个取代基,所述取代基独立地选自低碳基、低烷氧基或卤素,或R.sub.1和R.sub.2与碳原子一起为未取代或取代的2至5个碳原子的烷基,所述烷基未取代或取代为低碳基,n为0至3的整数,当R.sub.1与R.sub.2不同和/或R.sub.3与R.sub.4不同时,其对映体、顺反异构体和外消旋体,以及当R为氢时,其与药学上可接受的碱盐一起使用。公式I的化合物和当R为氢时,其药学上可接受的盐在支气管肺疾病治疗中有用,例如,缓解哮喘和过敏反应。