((2R,4E)-1-(p-methoxybenzyloxy)-5-iodo-4-methylpent-4-en-2-yloxy)(tert-butyl)dimethylsilane 、
dimethyl (7S)-2,4,6,8-tetradeoxy-2,4-dimethyl-L-galacto-non-7-ulopyranosiduronate 在
叔丁基锂 、 magnesium bromide ethyl etherate 作用下,
以
乙醚 、
二氯甲烷 为溶剂,
反应 2.5h,
以98%的产率得到methyl 2-((2S,4S,5R,6R)-4-(tert-butyl-dimethyl-silanyloxy)-6-((4E,2R,3R,7R)-7-(tert-butyl-dimethyl-silanyloxy)-3-hydroxy-8-(p-methoxy-benzyloxy)-5-methyloct-4-en-2-yl)-tetrahydro-2-methoxy-5-methyl-2H-pyran-2-yl)acetate