Rhodium-Catalyzed Oxidative <i>ortho</i>-Acylation of Benzamides with Aldehydes: Direct Functionalization of the sp<sup>2</sup> C–H Bond
作者:Jihye Park、Eonjeong Park、Aejin Kim、Youngil Lee、Ki-Whan Chi、Jong Hwan Kwak、Young Hoon Jung、In Su Kim
DOI:10.1021/ol201729w
日期:2011.8.19
A rhodium-catalyzedoxidative acylation of benzamides with aryl aldehydes via direct sp2 C–Hbond cleavage is described. In the presence of [Cp*RhCl2]2, AgSbF6, and silver carbonate as an oxidant, N,N-diethyl benzamides can be effectively carbonylated to yield ortho-acyl benzamides.
arylmagnesium bromides with TiCl4 affords the corresponding symmetric biaryls in moderate to good yields at 0°C or lower. Tributylmagnesate-induced halogen–magnesium exchange of aryl halides followed by the coupling reaction provides biaryls in good yields under mild conditions. This method can achieve a one-pot synthesis of biaryls containing functional groups such as esters, amides, or nitriles.