Stereoselective Synthesis and Characterization of (<i>Z</i>)-(−)-4-(1′-Alkoxyl-1′-alkyloxycarbonyl-methylidene)-5(<i>R</i>)-[(1<i>R</i>)-menthyloxy]-γ-butyrolactones
作者:Zhiqiang Feng、Chenglie Yin
DOI:10.1080/00397911003611760
日期:2011.1.31
Abstract A series of enantiomerically pure (Z)-(−)-4-(1′-alkyloxy-1′-alkyloxycarbonyl-methylidene)-5(R)-[(1R)-menthyloxy]-γ-butyrolactones were synthesized and characterized in good to excellent yields via O-alkylation of (4R,5R)-(−)-4-ethoxyoxalyl-5-[(1R)-menthyloxy]-γ-butyrolactone with alkyl halides in the presence of K2CO3 in acetone at room temperature.