Direct Displacement of Alkoxy Groups of Vinylogous Esters by Grignard Reagents
作者:Anthony J. Brockway、Marcos González-López、James C. Fettinger、Jared T. Shaw
DOI:10.1021/jo102537n
日期:2011.5.6
The direct displacement of alkoxy groups from the β position of aromatic and unsaturated esters and ketones is described. The reaction is chemo- and regioselective, displaying wide substrate scope.
An efficient Pd-catalyzed decarboxylative cross-coupling reaction of simple enamides was achieved. Depending on the choice of the nitrogen-protecting group, a site-selective synthesis of mono- or diarylated framework(s) was performed under mild conditions. This unprecedented reactivity could be applied to the synthesis of a range of 2- or 2,4-diarylated nitrogen-containing bioactive derivatives.