(1S,3S,4S,5S,6R)-3-Acetoxy-5,6-dihydroxy-7-oxa-bicyclo[2.2.1]heptane-2,2-dicarboxylic acid diethyl ester 在
对甲苯磺酸 作用下,
以
丙酮 为溶剂,
反应 1.0h,
生成
(1R,2R,6S,7S,9S)-9-Acetoxy-4,4-dimethyl-3,5,10-trioxa-tricyclo[5.2.1.02,6]decane-8,8-dicarboxylic acid diethyl ester