methyl (1R,2S,3R,10bR)-8,9-dimethoxy-2-(4-methoxyphenyl)-3-methyl-1-(2-oxoethyl)-1,2,3,5,6,10b-hexahydropyrrolo[2,1-a]isoquinoline-3-carboxylate 、
乙氧甲酰基亚甲基三苯基膦 以
二氯甲烷 为溶剂,
以70%的产率得到methyl (1R,2S,3R,10bR)-1-[(E)-4-ethoxy-4-oxobut-2-en-1-yl]-8,9-dimethoxy-2-(4-methoxyphenyl)-3-methyl-1,2,3,5,6,10b-hexahydropyrrolo[2,1-a]isoquinoline-3-carboxylate