(2R,6S,12bR)-3-Acetyl-2-[bis-(5,5-dimethyl-[1,3]dioxan-2-yl)-methyl]-1,2,6,7,12,12b-hexahydro-indolo[2,3-a]quinolizine-6-carboxylic acid methyl ester 在
sodium tetrahydroborate 作用下,
以
溶剂黄146 为溶剂,
以50%的产率得到(2S,3S,6S,12bR)-2-[Bis-(5,5-dimethyl-[1,3]dioxan-2-yl)-methyl]-3-((S)-1-hydroxy-ethyl)-1,2,3,4,6,7,12,12b-octahydro-indolo[2,3-a]quinolizine-6-carboxylic acid methyl ester