5-(tert-butyl-dimethyl-silanyloxy)-10-[9-butyl-8-(4-methoxycarbonyl-3-methyl-buta-1,3-dienyl)-3-methyl-9-methylsulfanylmethoxy-1,7-dioxa-spiro[5.5]undec-2-yl]-4,8-dimethyl-deca-2,6,8-trienoic acid methyl ester 在
lithium hydroxide 、
四丁基氟化铵 作用下,
以
四氢呋喃 、
甲醇 、
N,N-二甲基甲酰胺 为溶剂,
生成 (2E,4S,5S,6E,8E)-10-[(2S,3R,6S,8R,9S)-3-butyl-2-[(1E,3E)-5-methoxy-3-methyl-5-oxopenta-1,3-dienyl]-9-methyl-3-(methylsulfanylmethoxy)-1,7-dioxaspiro[5.5]undecan-8-yl]-5-hydroxy-4,8-dimethyldeca-2,6,8-trienoic acid 、 (2E,4S,5S,6E,8E)-10-[(2S,3R,6S,8R,9S)-3-butyl-2-[(1E,3E)-4-carboxy-3-methylbuta-1,3-dienyl]-9-methyl-3-(methylsulfanylmethoxy)-1,7-dioxaspiro[5.5]undecan-8-yl]-5-hydroxy-4,8-dimethyldeca-2,6,8-trienoic acid