Ynamide Preactivation Allows a Regio- and Stereoselective Synthesis of α,β-Disubstituted Enamides
作者:Lucas L. Baldassari、Aurélien de la Torre、Jing Li、Diogo S. Lüdtke、Nuno Maulide
DOI:10.1002/anie.201709128
日期:2017.12.4
Activate first, attack later: Thanks to an ynamide preactivation strategy, otherwise incompatible reagents can be used to prepare α,β-disubstituted enamides with high regio- and stereoselectivity. Mechanistic analysis reveals the intermediacy of a triflate-bound species as a solution-stable, effective keteniminium reservoir, which is amenable to the subsequent addition of organometallic reagents.