4-{6-[10-(2,2-dimethyl-[1,3]dioxolan-4-yl)-10-(4-methoxy-benzyloxy)-2-methyl-4-methylene-6-triisopropylsilanyloxy-dec-7-enyl]-5,6-dihydro-2H-pyran-2-yl}-but-2-ynoic acid 在
三苯基膦 、
偶氮二甲酸二乙酯 作用下,
以
苯 为溶剂,
生成
7-(2,2-dimethyl-[1,3]dioxolan-4-yl)-15-methyl-13-methylene-11-triisopropylsilanyloxy-6,21-dioxa-bicyclo[15.3.1]henicosa-9,19-dien-3-yn-5-one