在
silica gel 、
pyridinium chlorochromate 作用下,
以
二氯甲烷 为溶剂,
反应 3.0h,
生成
(1'R,2'R,6'S,8'R)-1',2'-dimethyl-5-methylenespiro<3-oxacyclopentane-1,8'-bicyclo<4.3.0>nonane>-2,4'-dione 、 (2S,3aS,7S,7aR)-7,7a-dimethyl-4'-methylidenespiro[1,3,3a,4,6,7-hexahydroindene-2,3'-oxolane]-2',5-dione