methyl 2-(1-oxoethyl)-3-phenyl-6-heptynoate 在
(+)-(1R,2R,4R,5R)-N,N’-bis-(3,5-di-tert-butyl-7-butylsalicylidene)-2,5-diaminobicyclo[2.2.2]octane iron(III) trifluoroacetate 作用下,
以
氯仿 为溶剂,
以43%的产率得到(1R,5S)-1-Acetyl-2-methylene-5-phenyl-cyclopentanecarboxylic acid methyl ester