Tungsten‐Catalyzed Direct
<i>N</i>
‐Alkylation of Anilines with Alcohols
作者:Xiao‐Bing Lan、Zongren Ye、Chenhui Yang、Weikang Li、Jiahao Liu、Ming Huang、Yan Liu、Zhuofeng Ke
DOI:10.1002/cssc.202002830
日期:2021.2.5
tungsten‐catalyzed N‐alkylation reaction of anilines with primary alcohols via BH/HA. This phosphine‐free W(phen)(CO)4 (phen=1,10‐phenthroline) system was demonstrated as a practical and easily accessible in‐situ catalysis for a broad range of amines and alcohols (up to 49 examples, including 16 previously undisclosed products). Notably, this tungsten system can tolerate numerous functional groups,
Palladium-Catalyzed Amidation of Unactivated C(sp<sup>3</sup>)H Bonds: from Anilines to Indolines
作者:Julia J. Neumann、Souvik Rakshit、Thomas Dröge、Frank Glorius
DOI:10.1002/anie.200903035
日期:2009.9.1
Unreactive CH to attractive CN: A palladium‐catalyzed intramolecular direct amidation of unactivated C(sp3)Hbonds combines CH activation and CN bond formation into one efficient process. Under the optimized conditions, an extraordinary tolerance of functional groups was observed, and numerous indoline derivatives were formed (see scheme).
replacement in catalysis is especially interesting if different catalytic reactivity is observed. We report, here, on the selective manganese-catalyzed base-switchable synthesis of N-alkylated amines or imines. In both reactions, borrowing hydrogen/hydrogen autotransfer (N-alkyl amine formation) or dehydrogenative condensation (imineformation), we start from the same amines and alcohols and use the same
Base-mediated cascade amidination/<i>N</i>-alkylation of amines by alcohols
作者:Chunyan Zhang、Zuyu Liang、Fenghong Lu、Xiaofei Jia、Guoying Zhang、Mao-Lin Hu
DOI:10.1039/d0cc04831c
日期:——
amidination/N-alkylation reaction of amines by alcohols has been developed. For the first time, nitriles have been identified as an efficient and benign water acceptor reagent in N-alkylation. Notably, the procedure tolerates a series of functional groups, such as methoxyl, halo, vinyl and hetero groups, providing a convenient method to construct different substituted diamino compounds, 15N labeled
Effect of the ancillary ligand in N-heterocyclic carbene iridium(III) catalyzed N-alkylation of amines with alcohols
作者:Xinshu Feng、Ming Huang
DOI:10.1016/j.poly.2021.115289
日期:2021.9
of air-stable N-heterocycliccarbene (NHC) Ir(III) complexes (Ir1-6), bearing various combinations of chlorine, pyridine and NHC ligands, were assayed for the N-alkylation of amines with alcohols. It was found that Ir3, with two monodentate 1,3-bis-methyl-imidazolylidene (IMe) ligands, emerged as the most active complex. A large variety of amines and primaryalcohols were efficiently converted into