6-Methyl-2-(3-methyl-but-2-enyl)-3-oxo-hept-6-enoic acid methyl ester 在
copper diacetate 、 manganese triacetate 作用下,
以
溶剂黄146 为溶剂,
生成 (1R,5S,6R)-6-Isopropenyl-5-methyl-2-oxo-bicyclo[3.2.1]octane-1-carboxylic acid methyl ester 、
(1R,5S,6R)-6-Isopropenyl-5-methyl-2-oxo-bicyclo[3.2.1]octane-1-carboxylic acid methyl ester 、 (1R,5S,6S)-6-(1-Acetoxy-1-methyl-ethyl)-5-methyl-2-oxo-bicyclo[3.2.1]octane-1-carboxylic acid methyl ester