Acyclic Branched α‐Fluoro Ketones for the Direct Asymmetric Mannich Reaction Leading to the Synthesis of β‐Tetrasubstituted β‐Fluoro Amines
作者:Barry M. Trost、Jacob S. Tracy、Tas Yusoontorn、Chao‐I Joey Hung
DOI:10.1002/anie.201913927
日期:2020.2.3
Zn/ProPhenol-catalyzed Mannichreaction. The reaction utilizes branched vinyl or alkynyl α-fluoro ketones that can be coupled with a range of aryl, heteroaryl, vinyl, or cyclopropyl aldimines in high yield and with excellent diastereo- (up to >20:1) and enantioselectivity (up to 99 %). The use of readily cleaved tert-butoxycarbonyl (Boc) or carboxybenzyl (Cbz) imine protecting groups adds utility to the reaction by allowing