methyl (2E,4S,5S,6E,8E)-5-((tert-butyldimethylsilyl)oxy)-10-((2R,3S,6S,8R,9S)-8-formyl-3,9-dimethyl-1,7-dioxaspiro[5.5]undecan-2-yl)-4,8-dimethyldeca-2,6,8-trienoate 、
4-二乙基膦酰基-3-甲基-2-丁烯酸甲酯 在
六甲基磷酰三胺 、
lithium hexamethyldisilazane 作用下,
以
四氢呋喃 为溶剂,
反应 1.0h,
以70%的产率得到(2E,6E,8E)-(4S,5S)-10-{(2R,3S,6S,8R,9S)-8-[(1E,3E)-4-methoxycarbonyl-3-methyl-buta-1,3-dienyl]-3,9-dimethyl-1,7-dioxa-spiro(5.5)undec-2-yl}-5-(tert-butyl-dimethyl-silanyloxy)-4,8-dimethyl-deca-2,6,8-trienoic acid methyl ester