moiety followed by β-C elimination strategy was less studied. Here a palladium-catalyzed C–C bond activation of an unstrained ketone enabled by a removable directing group through β-C elimination to synthesize 2-arylpyridine is described. The protocol features wide substrate scope with yields up to 95%, good functional group tolerance, and functionality of natural products. The 2-arylpyridine N-oxide
Direct arylation of azine N-oxides with aryl triflates
作者:Derek J. Schipper、Mohamed El-Salfiti、Christopher J. Whipp、Keith Fagnou
DOI:10.1016/j.tet.2009.03.077
日期:2009.6
Palladium catalyzed direct arylation of azine N-oxides using aryltriflates to afford the corresponding 2-aryl azine N-oxides is described. The reaction is carried out with a range of both N-oxides and aryltriflates. The arylation can be carried out in sequence to yield differentially diarylated products. The regioselectivity and scope of 3-substituted azine N-oxides are investigated. The method is