(1R,2R,4R)-4-<(E)-2-bromo-1-propen-1-yl>-2-methoxy-1-<(triisopropylsilyl)oxy>cyclohexane 、
(E)-(2R,3S,5R,6R,10S,12S,13R,14S,16R)-6-Allyl-16-[1,3]dithian-2-yl-12,14-dimethoxy-5-(4-methoxy-benzyloxy)-2,8,10-trimethyl-3,13-bis-triisopropylsilanyloxy-heptadec-7-enal 在
叔丁基锂 、 magnesium bromide 作用下,
以
四氢呋喃 为溶剂,
以60%的产率得到(1E,3S,4S,5S,7R,8R,9E,12S,14S,15R,16S,18R)-18-(1,3-dithian-2-yl)-14,16-dimethoxy-7-[(4-methoxyphenyl)methoxy]-1-[(1R,3R,4R)-3-methoxy-4-tri(propan-2-yl)silyloxycyclohexyl]-2,4,10,12-tetramethyl-8-prop-2-enyl-5,15-bis[tri(propan-2-yl)silyloxy]nonadeca-1,9-dien-3-ol