4-[(2R,6R)-2-[(2S,6S,7E,10S,11S,12E)-6-[tert-butyl(dimethyl)silyl]oxy-10,11-dihydroxy-2-methyl-13-[(2S)-4-methyl-3,6-dihydro-2H-pyran-2-yl]-4-methylidenetrideca-7,12-dienyl]-3,6-dihydro-2H-pyran-6-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 12.0h,
以75%的产率得到(1R,7S,9E,11S,15S,17R)-11-[tert-butyl(dimethyl)silyl]oxy-7-[(E,1S)-1-hydroxy-3-[(2S)-4-methyl-3,6-dihydro-2H-pyran-2-yl]prop-2-enyl]-15-methyl-13-methylidene-6,21-dioxabicyclo[15.3.1]henicosa-9,19-dien-3-yn-5-one