4-O-[(1S,2E,4E)-1-[(2R,5S,8S,9R)-9-[(2E,4E,6S,7S)-6,8-bis[[tert-butyl(dimethyl)silyl]oxy]-3,7-dimethylocta-2,4-dienyl]-2-butyl-8-methyl-1,10-dioxaspiro[4.5]decan-2-yl]-4-methyl-6-oxo-6-(2-trimethylsilylethoxy)hexa-2,4-dienyl] 1-O-(2-trimethylsilylethyl) butanedioate 在
吡啶 、
氟化氢吡啶 作用下,
以
四氢呋喃 为溶剂,
反应 6.0h,
以65%的产率得到4-O-[(1S,2E,4E)-1-[(2R,5S,8S,9R)-2-butyl-9-[(2E,4E,6S,7S)-6-[tert-butyl(dimethyl)silyl]oxy-8-hydroxy-3,7-dimethylocta-2,4-dienyl]-8-methyl-1,10-dioxaspiro[4.5]decan-2-yl]-4-methyl-6-oxo-6-(2-trimethylsilylethoxy)hexa-2,4-dienyl] 1-O-(2-trimethylsilylethyl) butanedioate