Diethyl 2-[2-[[tert-butyl(diphenyl)silyl]oxymethyl]-5-methylhex-4-enyl]propanedioate 在
manganese(III) acetate 、 copper(II) bis(trifluoromethanesulfonate) 作用下,
以
乙腈 为溶剂,
生成 (+/-)-(3aR,5S,6aS)-ethyl 5-((tert-butyldiphenylsilyloxy)methyl)-1,1-dimethyl-3-oxohexahydro-1H-cyclopenta[c]furan-3a-carboxylate 、 (+/-)-(3aR,5R,6aS)-ethyl 5-((tert-butyldiphenylsilyloxy)methyl)-1,1-dimethyl-3-oxohexahydro-1H-cyclopenta[c]furan-3a-carboxylate