乙酸酐 、 (2S,3S,4R,5R,6R)-6-((2S,3R,4S)-4,6-Dimethoxy-3-methyl-tetrahydro-pyran-2-yl)-2,4-dimethyl-heptane-1,3,5-triol 在
4-二甲氨基吡啶 、
溶剂黄146 作用下,
生成
Acetic acid (1S,2S)-3-acetoxy-1-[(S)-1-((1R,3S,4S,5R,7R,8S)-7-methoxy-4,8-dimethyl-2,9-dioxa-bicyclo[3.3.1]non-3-yl)-ethyl]-2-methyl-propyl ester