(Z)-(R)-2,2-diphenylcyclopentyl 2-(tert-butyldimethylsilyloxy)-4,4-dimethylpent-2-enoate 、
三氯乙酰氯 在
锌 作用下,
以
乙醚 为溶剂,
生成 (1R,4R)-1-tert-butyldimethylsilyloxy-2,2-dichloro-4,4-dimethyl-3-oxo-cyclobutanecarboxylic acid (R)-(2,2-diphenyl)cyclopentyl ester 、 (1S,4S)-1-tert-butyldimethylsilyloxy-2,2-dichloro-4,4-dimethyl-3-oxo-cyclobutanecarboxylic acid (R)-(2,2-diphenyl)cyclopentyl ester