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
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.
TEMPO-Promoted Mono- and Bisimidation of Tertiary Anilines: Synthesis of Symmetric and Unsymmetric <i>N</i>-Mannich Bases
作者:Xiu Juan Xu、Adila Amuti、Wen Jing Hu、Qiaerbati Adelibieke、Abudureheman Wusiman
DOI:10.1021/acs.joc.2c00700
日期:2022.7.15
A TEMPO-promoted method was developed for the synthesis of symmetric bis-N-Mannich bases via sequential activation of two α,α′-amino C(sp3)–H bonds of N,N-dimethylanilines under mild conditions. This methodology was further extended for monoimidation of α-amino-functionalized methylanilines to give unsymmetric N-Mannich bases in good to high yields. Several control experiments were performed, and the
NIS/TEMPO‐Promoted Oxidative Cyanation and Nitro‐Mannich Reaction of Tertiary Amines
作者:Bulunuer Yusan、Adila Amuti、Xiu Juan Xu、Abudureheman Wusiman
DOI:10.1002/ejoc.202400144
日期:2024.5.13
NIS/TEMPO-mediated procedure for the C−C cross-coupling reaction of tertiaryamines with trimethylsilyl cyanide (TMSCN) and nitroalkanes was developed. The N-Mannich base formed from the tertiaryamine and NIS had a stabilizing effect on the iminium intermediate.