A facile sp 3 C–H bonds amidation of N , N -dimethylanilines by a novel ionic iron(III) complex containing an imino-functionalized imidazolium cation
作者:Fan Zhu、Bing Lu、Hongmei Sun、Qi Shen
DOI:10.1016/j.tetlet.2016.07.098
日期:2016.9
imidazolium salt, 1-[1-(2,6-diisopropylphenylimino)ethyl]-3-benzylimidazolium chloride ([HL]Cl,), was designed and used to prepare a novel ionic iron(III) complex [HL][FeCl4] (2). Complex 2 was an efficient and easy-to-use catalyst for the direct sp3 C–H bond amidation of N,N-dimethylanilines, affording a wide variety of N-substituted aromatic or aliphatic amides in moderate to good yields. This reaction is
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