Au(iii)-catalyzed intermolecular amidation of benzylic C–H bonds
作者:Yan Zhang、Bainian Feng、Chengjian Zhu
DOI:10.1039/c2ob26857d
日期:——
Au(III)-catalyzed intermolecular amidations of benzylic C–H bonds with sulfonamides and carboxamides are described. The protocol with the Au–bipy complex/N-bromosuccinimide system provides practical applications for synthesis of various amides via C–H activations. The reaction proceeds with high efficiency to give the corresponding amines, which are extremely useful synthetic intermediates.
We have developed a general and efficient method for copper-catalyzedamidation of saturated C−H bonds under mild conditions, and the used substrates include benzylic reagents, the N,N-dimethylaniline derivatives, the free carboxamides, and sulfonamides. The protocol uses inexpensive and readily available CuBr/N-halosuccinimide (NBS or NCS) as the catalyst/oxidant, so it provides practical applications