A rhodium-catalyzed C–H functionalization with activated amides by decarbonylation has been developed. Notably, this is the first C–H arylation employing N-acylsaccharins as coupling partners to give biaryls in good to excellent yields. The highlight of the work is the high tolerance of functional groups such as formyl, ester, and vinyl and the use of a removable directing group.
New multipurpose arylation/acylation/transaminationreagents, N‐acylisatins, have been developed by selective ‘inside‐outside’ C−Nbondcleavage under different catalytic conditions. As activated amides, N‐acylisatins undergo Rh‐catalyzed C−H arylation and Pd‐catalyzed acylation by cleavage outside the C−Nbond, and the desired biaryls and diaryl ketones were obtained in good to excellent yields. Generally
Rhodium-Catalyzed C–H Bond Functionalization with Amides by Double C–H/C–N Bond Activation
作者:Guangrong Meng、Michal Szostak
DOI:10.1021/acs.orglett.6b00058
日期:2016.2.19
first C–Hbond functionalization with amides as the coupling partners via selective activation of the amide N–C bond using rhodium(I) catalysts under highly chemoselective conditions is reported. Notably, this report constitutes the first catalytic activation of the amide N–C(O) bond by rhodium. We expect that this concept will have broad implications for using amides as coupling partners for C–H activation
Efficient rhodium(I)-catalyzed regioselective direct arylation and alkenylation of aromatic C−H bonds has been realized with aromatic carboxylic and cinnamic anhydrides as the coupling partners via decarbonylation and C−H activation under phosphine-free conditions.