methyl <(2,4-dimethoxybenzyl)oxy>acetate 、
(Z)-(2R,5S,6S)-5-(tert-Butyl-dimethyl-silanyloxy)-6-methoxy-2-methyl-non-7-enal 在
lithium diisopropyl amide 作用下,
生成 (Z)-(4R,7S,8S)-7-(tert-Butyl-dimethyl-silanyloxy)-2-(2,4-dimethoxy-benzyloxy)-3-hydroxy-8-methoxy-4-methyl-undec-9-enoic acid methyl ester