4-[(2R,3S,4S,6R)-4-[tert-butyl(dimethyl)silyl]oxy-6-[(S)-[(2R,3R,4R,5R,6R)-6-[(4S,5E)-4-[tert-butyl(dimethyl)silyl]oxy-7-chloro-2-methylideneocta-5,7-dienyl]-4,5-bis[(4-methoxyphenyl)methoxy]-3-methyloxan-2-yl]-hydroxymethyl]-6-methoxy-3-methyloxan-2-yl]butyl-triphenylphosphanium;iodide 、
[tert-butyl(diphenyl)silyl] 2-[(2S,4S,6S,8R,10S)-10-acetyloxy-2-[(3R,4S,5S)-4-acetyloxy-7-[(2R,4S,6R,8S,10S)-4-[tert-butyl(dimethyl)silyl]oxy-2-formyl-10-methoxy-1,7-dioxaspiro[5.5]undecan-8-yl]-3,5-dimethyl-2-methylidene-6-oxoheptyl]-4-hydroxy-4-methyl-1,7-dioxaspiro[5.5]undecan-8-yl]acetate 在
lithium diisopropyl amide 作用下,
以
四氢呋喃 、
六甲基磷酰三胺 为溶剂,
以40%的产率得到[tert-butyl(diphenyl)silyl] 2-[(2S,4S,6S,8R,10S)-10-acetyloxy-2-[(3R,4S,5S)-4-acetyloxy-7-[(2R,4S,6R,8S,10S)-4-[tert-butyl(dimethyl)silyl]oxy-2-[(Z)-5-[(2R,3S,4S,6R)-4-[tert-butyl(dimethyl)silyl]oxy-6-[(S)-[(2R,3R,4R,5R,6R)-6-[(4S,5E)-4-[tert-butyl(dimethyl)silyl]oxy-7-chloro-2-methylideneocta-5,7-dienyl]-4,5-bis[(4-methoxyphenyl)methoxy]-3-methyloxan-2-yl]-hydroxymethyl]-6-methoxy-3-methyloxan-2-yl]pent-1-enyl]-10-methoxy-1,7-dioxaspiro[5.5]undecan-8-yl]-3,5-dimethyl-2-methylidene-6-oxoheptyl]-4-hydroxy-4-methyl-1,7-dioxaspiro[5.5]undecan-8-yl]acetate