Electrochemical Oxidative C(sp
<sup>3</sup>
)−H/N−H Cross‐Coupling for
<i>N</i>
‐Mannich Bases with Hydrogen Evolution
作者:Pan Wang、Zhenlin Yang、Ting Wu、Chenyang Xu、Ziwei Wang、Aiwen Lei
DOI:10.1002/cssc.201802676
日期:2019.7.5
bases was established through electrochemical external‐oxidant‐free C(sp3)−H/N−Hcross‐coupling with hydrogen evolution. Various N‐methylanilines were explored in this transformation. Moreover, simple amides, heteroatom‐containing amides, and succinimides were well tolerated in moderate‐to‐good yields. In addition, the electrochemicaldehydrogenativeC(sp3)−H/N−Hcross‐coupling could be scaled up to 5 mmol
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
Copper-Catalyzed Amidation of sp<sup>3</sup> C−H Bonds Adjacent to a Nitrogen Atom
作者:Yongming Zhang、Hua Fu、Yuyang Jiang、Yufen Zhao
DOI:10.1021/ol701715m
日期:2007.9.1
We have developed a novel copper-catalyzed amidation of unactivated sp(3) C-Hbondsadjacent to a nitrogen atom by using an inexpensive catalyst-oxidant (CuBr/(t)BuOOH) system under mild conditions. The dephenylation was first found for N-benzylaniline, and the new class of products provide diverse structures for pharmaceuticals and combinatorial chemistry.