(4S,5R,6R)-7-Benzyloxy-5-methoxymethoxy-4,6-dimethyl-heptan-3-one 、
[(Z)-(1S,2R)-1-((R)-2-Benzyloxy-1-methyl-ethyl)-5-iodo-2,4-dimethyl-pent-3-enyloxy]-tert-butyl-dimethyl-silane 在
六甲基磷酰三胺 、
lithium diisopropyl amide 作用下,
以
四氢呋喃 为溶剂,
以23%的产率得到(Z)-(2R,3R,4S,10R,11S,12R)-1,13-Bis-benzyloxy-11-(tert-butyl-dimethyl-silanyloxy)-3-methoxymethoxy-2,4,6,8,10,12-hexamethyl-tridec-8-en-5-one