Improved processes for preparing 2'-alkoxy-2,5-di-substituted-9-oxo-6,7-benzomorphans from benz[e]indolines and synthesis of the benz[e]indoline intermediates are described. A representative example involves synthesis of 9b-allyl-8-methoxy-3-methyl-5,9b-dihydrobenz[e]indoline and bromination thereof to 9b-allyl-4-bromo-8-methoxy-2,4,5,9b-tetrahydro-1H-benz[e]indole methylbromide which is then hydrolyzed with a weak base such as ammonium bicarbonate to provide 5-allyl-2'-methoxy-2-methyl-9-oxo-6,7-benzomorphan.
本文描述了从苯[e]
吲哚制备2'-烷氧基-2,5-二取代-9-氧代-6,7-苯并
吗啡的改进工艺,并合成了苯[e]
吲哚中间体。一个代表性的例子涉及合成9b-烯丙基-8-甲氧基-3-甲基-5,9b-二氢苯[e]
吲哚,并对其进行
溴化反应,制得9b-烯丙基-4-
溴-8-甲氧基-2,4,5,9b-四氢-1H-苯[e]
吲哚甲
溴化物,然后用弱碱(如
碳酸氢铵)
水解,得到5-烯丙基-2'-甲氧基-2-甲基-9-氧代-6,7-苯并
吗啡。