2',4',4"-tri-O-acetyldesmycosin 、
甲氧羰基亚甲基三苯基正膦 以
苯 为溶剂,
反应 2.0h,
以85%的产率得到4-[15-(5-acetoxy-3,4-dimethoxy-6-methyl-tetrahydro-pyran-2-yloxymethyl)-6-(3,5-diacetoxy-4-dimethylamino-6-methyl-tetrahydro-pyran-2-yloxy)-16-ethyl-4-hydroxy-5,9,13-trimethyl-2,10-dioxo-oxacyclohexadeca-11,13-dien-7-yl]-but-2-enoic acid methyl ester