(8R,8aS)-8-Benzyloxy-8-methyl-6-[(E)-(R)-2-methyl-5-((4R,5R)-2,2,5-trimethyl-[1,3]dioxolan-4-yl)-hex-4-en-(E)-ylidene]-hexahydro-indolizin-7-one 在
sodium tetrahydroborate 、 cerium(III) chloride 作用下,
以
甲醇 为溶剂,
以95%的产率得到(6E,7S,8R,8aS)-8-methyl-6-[(E,2R)-2-methyl-5-[(4R,5R)-2,2,5-trimethyl-1,3-dioxolan-4-yl]hex-4-enylidene]-8-phenylmethoxy-1,2,3,5,7,8a-hexahydroindolizin-7-ol