申请人:Pfizer Inc.
公开号:US04414388A1
公开(公告)日:1983-11-08
Antiallergy and antiulcer agents having the formula (I), ##STR1## and their pharmaceutically acceptable salts, wherein R.sub.1 and R.sub.2 taken separately are each hydrogen or lower alkyl; and R.sub.1 and R.sub.2 taken together are alkylene of 3-9 carbon atoms or phenylalkylene of 9-11 carbon atoms, with the proviso that the ring so formed is between 5- and 8-membered; acids of the formula (II), ##STR2## wherein R.sub.1 and R.sub.2 are as defined above and R.sub.3 is hydrogen, which are useful as intermediates for compounds of the formula (I), but in many instances also possess the same useful biological activity as do formula I compounds; and intermediates of the formula II wherein R.sub.1 and R.sub.2 are defined as above, and R.sub.3 is alkyl of 1 to 4 carbon atoms, carbalkoxy of 2 to 5 carbon atoms, carbophenoxy or carbobenzoxy, are also described.
具有以下式子(I)的抗过敏和抗溃疡剂,以及它们的药学上可接受的盐:##STR1## 其中R.sub.1和R.sub.2分别为氢或低碳基;而R.sub.1和R.sub.2在一起则为3-9个碳原子的烷基或9-11个碳原子的苯基烷基,但所形成的环在5-8个成员之间;式子(II)的酸:##STR2## 其中R.sub.1和R.sub.2如上所定义,而R.sub.3为氢,这些酸是化合物(I)的中间体,但在许多情况下也具有与化合物(I)相同的有用生物活性;还描述了式子II的中间体,其中R.sub.1和R.sub.2如上所定义,而R.sub.3为1-4个碳原子的烷基,2-5个碳原子的羰基烷氧基,羰基苯氧基或羰基苯甲氧基。