[(2S,4S,6R,8S,10S)-2-[(3S,5R,6R)-7-[(2R,4S,6S,8S,10S)-4-[tert-butyl(dimethyl)silyl]oxy-2-[[tert-butyl(diphenyl)silyl]oxymethyl]-10-methoxy-1,7-dioxaspiro[5.5]undecan-8-yl]-6-[(4-methoxyphenyl)methoxy]-3,5-dimethyl-2-methylidene-4-oxoheptyl]-4-hydroxy-8-[2-[(4-methoxyphenyl)methoxy]ethyl]-4-methyl-1,7-dioxaspiro[5.5]undecan-10-yl] acetate 在
potassium carbonate 作用下,
以
甲醇 、
水 为溶剂,
生成 (3R,5R,6R)-7-[(2R,4S,6S,8S,10S)-4-[tert-butyl(dimethyl)silyl]oxy-2-[[tert-butyl(diphenyl)silyl]oxymethyl]-10-methoxy-1,7-dioxaspiro[5.5]undecan-8-yl]-2-[[(2S,4S,6R,8S,10S)-4,10-dihydroxy-8-[2-[(4-methoxyphenyl)methoxy]ethyl]-4-methyl-1,7-dioxaspiro[5.5]undecan-2-yl]methyl]-6-[(4-methoxyphenyl)methoxy]-3,5-dimethylhept-1-en-4-one 、