2,2-Dimethyl-propionic acid (1R,3R,6R)-6-ethynyl-1,5,5-trimethyl-7-oxa-bicyclo[4.1.0]hept-3-yl ester 、
乙醛 在
lithium diisopropyl amide 作用下,
生成 2,2-Dimethyl-propionic acid (1R,3R,6R)-6-(3-hydroxy-but-1-ynyl)-1,5,5-trimethyl-7-oxa-bicyclo[4.1.0]hept-3-yl ester