A copper-catalyzed nucleophilic displacement of α-triflyloxy nitriles and esters with silicon nucleophiles allows for the stereospecific generation of highly enantioenriched α-silylated carboxyl compounds. The enantioselective synthesis of α-silylated nitriles is unprecedented. The catalytic system exhibits good functional group tolerance. The stereochemical course of the substitution is shown to proceed
One-Step Preparation of <i>O</i>-(α-Bromoacyl) Cyanohydrins by Minor Enantiomer Recycling: Synthesis of 4-Amino-2(5<i>H</i>)-furanones
作者:Robin Hertzberg、Christina Moberg
DOI:10.1021/jo401401c
日期:2013.9.20
material, the products were obtained in good to high yields and in most cases with excellent diastereoselectivites. The synthetic importance of these compounds was demonstrated by the synthesis of 4-amino-2(5H)-furanones, a class of compounds that have shown both biological activity and utility as synthetic intermediates. This transformation was achieved by an intramolecular Blaise reaction, which gave