(3aR,5aR,6S,9R,10aR,Z)-6-((2S,3R,4S,5R)-4,5-dihydroxy-3-triethylsilyloxy-tetrahydro-2H-pyran-2-yloxy)-8-((triethylsilyloxy)methyl)-1-isopropyl-3a,5a-dimethyl-2,3,3a,4,5,5a,6,9,10,10a-decahydrocyclohepta[e]inden-9-yl benzoate 、
苯甲酸酐 在
4-二甲氨基吡啶 TEA 作用下,
以
二氯甲烷 为溶剂,
反应 5.0h,
以92%的产率得到(3aR,5aR,6S,9R,10aR,Z)-6-((2S,3R,4S,5R)-5-benzyloxy-4-hydroxy-3-triethylsilyloxy-tetrahydro-2H-pyran-2-yloxy)-8-((triethylsilyloxy)methyl)-1-isopropyl-3a,5a-dimethyl-2,3,3a,4,5,5a,6,9,10,10a-decahydrocyclohepta[e]inden-9-yl benzoate