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,5S,6R)-4,5-dihydroxy-3-methyl-6-[(4S,5E)-2-methylidene-4-triethylsilyloxyocta-5,7-dienyl]oxan-2-yl]-triethylsilyloxymethyl]-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-methyl-4-triethylsilyloxy-1,7-dioxaspiro[5.5]undecan-8-yl]acetic acid 在
2,4,6-三氯苯甲酰氯 、
N,N-二异丙基乙胺 、
4-二甲氨基吡啶 作用下,
以
苯 为溶剂,
反应 27.0h,
以4.4 mg的产率得到[(1S,3S,5R,9R,10R,11R,13R,14S,15R,17S,18S,19R,23Z,25R,27S,29R,31S,33S,36S,37S,38R,41S,43S,49S)-37-acetyloxy-17,27-bis[[tert-butyl(dimethyl)silyl]oxy]-10-hydroxy-15,31-dimethoxy-18,36,38,43,49-pentamethyl-39-methylidene-11-[(4S,5E)-2-methylidene-4-triethylsilyloxyocta-5,7-dienyl]-7,35-dioxo-14,43-bis(triethylsilyloxy)-8,12,45,46,47,48,50-heptaoxaheptacyclo[39.3.1.11,5.19,13.115,19.125,29.129,33]pentacont-23-en-3-yl] acetate