4-((2R,6R)-6-((2S,6S,7E,10S,11S,12E)-6-(tert-butyldimethylsilyloxy)-11-hydroxy-10-(4-methoxybenzyloxy)-2-methyl-13-((S)-4-methyl-3,6-dihydro-2H-pyran-2-yl)-4-methylenetrideca-7,12-dienyl)-5,6-dihydro-2H-pyran-2-yl)but-2-ynoic acid 在
2,4,6-三氯苯甲酰氯 、
三乙胺 、
4-二甲氨基吡啶 作用下,
以
苯 为溶剂,
反应 16.0h,
以35%的产率得到(1R,7S,8S,12S,16S,18R,E)-12-(tert-butyldimethylsilyloxy)-8-(4-methoxybenzyloxy)-16-methyl-7-((E)-2-((S)-4-methyl-3,6-dihydro-2H-pyran-2-yl)vinyl)-14-methylene-6,22-dioxabicyclo[16.3.1]docosa-10,20-dien-3-yn-5-one