(3aR,4S,4aS,7aR)-4-Acetoxymethyl-6,6-dimethyl-3-oxo-3,3a,4,4a,5,6,7,7a-octahydro-1H-2-oxa-s-indacene-4-carboxylic acid methyl ester 在
potassium tert-butylate 作用下,
以
乙醚 为溶剂,
反应 0.5h,
生成
(4S,4aS,7aS)-4-Acetoxymethyl-6,6-dimethyl-3-oxo-3,4,4a,5,6,7,7a,8-octahydro-1H-2-oxa-s-indacene-4-carboxylic acid methyl ester