Selective Unusual Pd-Mediated Biaryl Coupling Reactions: Solvent Effects with Carbonate Bases
作者:Ludovic Donati、Sylvie Michel、François Tillequin、François-Hugues Porée
DOI:10.1021/ol902570s
日期:2010.1.1
A one-step Pd-catalyzed reaction performed on an o-bromobenzamide permitted the selective formation of either phenanthridinones 2 via an ipso substitution or new phenanthridinone-1-carboxamides 3 through a direct N-arylation. A direct correlation between the solvent polarity and the carbonate base on the selectivity has been observed. The proposed catalytic cycle involves the initial formation of a common Intermediate and depends on the base assistance.