(3aR,3a
1R,3bR,6aS,6bR,11bR)-methyl 3a-ethyl-9-methoxy-7-methyl-5-thioxo-3a,3a
1,3b,6a,6b,7,12,13-octahydro-1H-[1,3]dioxolo[4,5-a]indolizino[8,1-cd]carbazole-6a-carboxylate 在
1,3-二甲基-2-苯基-2-磷杂咪唑烷 作用下,
以
邻二氯苯 为溶剂,
反应 2.5h,
以91%的产率得到(3aS,3a
1S,5aR,10bR)-methyl 3a-ethyl-8-methoxy-6-methyl-3a,3a
1,5a,6,11,12-hexahydro-1H-indolizino[8,1-cd]carbazole-5-carboxylate