Diastereoselective Radical Hydrogen Transfer Reactions using N-Heterocyclic Carbene Boranes
作者:Guillaume Tambutet、Yvan Guindon
DOI:10.1021/acs.joc.6b02066
日期:2016.11.18
Reported herein are the first diastereoselective and Lewis acid-mediated radical reactions of N-heterocyclic carbene (NHC) boranes. We applied these reactions to the synthesis of four propionate diastereoisomers combining an aldol reaction, followed by a stereoselective radical-based reduction in which the NHC borane serves as the hydrogen donor, thus obviating the use of tin-based reagents. The 2