2-Chloro-N-((2S,11bS)-2-hydroxy-9,10-dimethoxy-1,3,4,6,7,11b-hexahydro-2H-pyrido[2,1-a]isoquinolin-2-ylmethyl)-N-methyl-acetamide 在
potassium tert-butylate 作用下,
以
四氢呋喃 、
叔丁醇 为溶剂,
生成
(2S,11bS)-9,10-dimethoxy-4'-methylspiro[1,3,4,6,7,11b-hexahydrobenzo[a]quinolizine-2,6'-morpholine]-3'-one