申请人:Teijin Limited
公开号:US04169150A1
公开(公告)日:1979-09-25
Novel 4H-pyrrolo[1,2-a][1,4]benzodiazepine derivatives of the formula ##STR1## wherein at least one of R.sub.1, R.sub.2 and R.sub.3 represent lower alkyl and the remainder hydrogen, R.sub.4 represents hydrogen or lower alkyl, ring A optionally contains at least one substituent selected from halogen, nitro and trifluoromethyl, and ring B optionally contains at least one substituent selected from halogen, nitro, trifluoromethyl, lower alkyl and lower alkoxy; and novel intermediates thereof expressed by the formula ##STR2## wherein Z represents protected amino. Compounds of formula (I) are prepared by subjecting compounds of formula (II) to protective group-elimination and cyclization. The compounds of formula (I) and acid addition salts thereof have useful anti-anxietic, sedative, anti-convulsant, muscle relaxant and hypnotic, and their toxicity is low.
化合物的式子为##STR1## 其中至少有一个R.sub.1、R.sub.2和R.sub.3代表较低的烷基,其余的代表氢,R.sub.4代表氢或较低的烷基,环A可以含有至少一种取代基,所选取代基来自卤素、硝基和三氟甲基,环B可以含有至少一种取代基,所选取代基来自卤素、硝基、三氟甲基、较低的烷基和较低的烷氧基;以及其新的中间体,其式子为##STR2## 其中Z代表保护氨基。通过对式子(II)的保护基消除和环化反应制备式子(I)的化合物。化合物(I)及其酸加成盐具有有用的抗焦虑、镇静、抗惊厥、肌肉松弛和催眠作用,其毒性低。