tert-butyl N-[2-(3,4-dimethoxyphenyl)ethyl]carbamate 在
盐酸 、
lithium diisopropyl amide 作用下,
以
四氢呋喃 、
1,4-二氧六环 、
二氯甲烷 为溶剂,
反应 4.5h,
生成
methyl (2R,3R,11bS)-2-[2-(benzyloxy)ethyl]-9,10-dimethoxy-4-oxo-2,3,4,6,7,11b-hexahydro-1H-pyrido[2,1-a]isoquinoline-3-carboxylate 、
methyl (2R,3S,11bS)-2-[2-(benzyloxy)ethyl]-9,10-dimethoxy-4-oxo-2,3,4,6,7,11b-hexahydro-1H-pyrido[2,1-a]isoquinoline-3-carboxylate 、 (2R,3R,11bR)-methyl 2-(2-(benzyloxy)ethyl)-9,10-dimethoxy-4-oxo-2,3,4,6,7,11b-hexahydro-1H-pyrido[2,1-a]isoquinoline-3-carboxylate 、 methyl (2R,3S,11bR)-2-[2-(benzyloxy)ethyl]-9,10-dimethoxy-4-oxo-2,3,4,6,7,11b-hexahydro-1H-pyrido[2,1-a]isoquinoline-3-carboxylate