A novel general method for preparation of α-fluoro-α-arylcarboxylic acid. Direct fluorination of silyl ketene acetals with Selectfluor®
作者:Fei Zhang、Jake Z. Song
DOI:10.1016/j.tetlet.2006.08.057
日期:2006.10
The reaction of an α-arylcarboxylic acid with TBSCl and LiHMDS in THF yielded bis-silyl ketene acetal, which was directly fluorinated with inexpensive Selectfluor® to produce the corresponding α-fluoro-α-arylcarboxylic acid in high yield. Application of the methodology to the synthesis of α-fluorocarboxylic ester from the corresponding carboxylic ester is also described.
用TBSCl和加入LiHMDS在THF中的α-芳基羧酸的反应得到双甲硅烷基乙烯酮缩二醇,将其直接用廉价的Selectfluor氟化®以产生高收率的相应的α氟-α-芳基羧酸。还描述了该方法在从相应的羧酸酯合成α-氟代羧酸酯中的应用。