Novel tricyclic compounds of the formula: ##STR1## wherein A is --CH.sub.2 --CH.sub.2 --, --CH=CH-- or ##STR2## X is hydrogen, halogen, nitro, trifluoromethyl, C.sub.1 -C.sub.3 alkyl or C.sub.1 -C.sub.3 alkoxy, R.sub.1 and R.sub.2 are each hydrogen or C.sub.1 -C.sub.4 alkyl and R.sub.3 is hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.3 -C.sub.5 alkenyl, C.sub.3 -C.sub.5 alkynyl, C.sub.3 -C.sub.6 cycloalkyl (C.sub.1 -C.sub.3)alkyl, ar(C.sub.1 -C.sub.3)alkyl, polyhalo(C.sub.1 -C.sub.2)alkyl, C.sub.1 -C.sub.4 alkoxy(C.sub.1 -C.sub.3)alkyl or hydroxy(C.sub.1 -C.sub.3)alkyl, and non-toxic salts thereof which are useful as antidepressants and can be prepared by reduction of a compound of the formula: ##STR3## wherein A, X, R.sub.1, R.sub.2 and R.sub.3 are each as defined above.
式子如下:##STR1##其中,A为--CH.sub.2 --CH.sub.2 --,--CH=CH--或##STR2## X为氢、卤素、硝基、三
氟甲基、C.sub.1-C.sub.3烷基或C.sub.1-C.sub.3烷氧基,R.sub.1和R.sub.2分别为氢或C.sub.1-C.sub.4烷基,R.sub.3为氢、C.sub.1-C.sub.4烷基、C.sub.3-C.sub.5烯基、C.sub.3-C.sub.5炔基、C.sub.3-C.sub.6环烷基(C.sub.1-C.sub.3)烷基、ar(C.sub.1-C.sub.3)烷基、多卤(C.sub.1-C.sub.2)烷基、C.sub.1-C.sub.4烷氧基(C.sub.1-C.sub.3)烷基或羟基(C.sub.1-C.sub.3)烷基。这些化合物的非毒性盐可作为抗抑郁剂,可通过还原式子:##STR3##其中A、X、R.sub.1、R.sub.2和R.sub.3均如上所述。