The invention relates to novel cyclopenteno[b]pyridine derivatives which have a group X on the 7-position and related tricyclic compounds. X is CONHR.sup.3, or CO.sub.2 R.sup.5 wherein R.sup.3 is hydrogen or lower alkyl and R.sup.5 is hydrogen or a lower alkyl or lower aralkyl group which may be substituted by alkyl, alkoxy, halogen, nitro or trifluoromethyl; other substituents may be present. The compounds are intermediates for compounds wherein X is CSNHR.sup.3 which are anti-ulcer agents.
本发明涉及一种新颖的
环戊烯[b]
吡啶衍生物,其在7-位上有一个X基团,以及相关的
三环化合物。其中X为CONHR.sup.3或CO.sub.2R.sup.5,其中R.sup.3为氢或低碳基,R.sup.5为氢或低碳基或低芳基碳基,其可被烷基、烷氧基、卤素、硝基或三
氟甲基取代;其他取代基也可以存在。这些化合物是X为CSNHR.sup.3的化合物的中间体,后者是抗溃疡剂。