Highly Stereoselective Synthesis of Trifluoromethylated Compounds via Ester-Enolate [2,3]-Wittig and [3,3]-Ireland−Claisen Rearrangements
作者:Tsutomu Konno、Hideki Umetani、Tomoya Kitazume
DOI:10.1021/jo961246i
日期:1997.1.1
have been obtained in optically pure forms via effective enzymatic kinetic resolution and then converted into (E)- or (Z)-allylic alcohols. [2,3]-Wittig rearrangement of the corresponding [[gamma-(trifluoromethyl)allyl]oxy]acetic acidmethylesters afforded alpha-hydroxy-beta-(trifluoromethyl)-gamma,delta-unsaturated carboxylic acidmethylesters in good yields. The rearrangement of (Z)-substrates proceeded