Visible-Light-Induced Oxazoline Formations from <i>N</i>-Vinyl Amides Catalyzed by an Ion-Pair Charge-Transfer Complex
作者:Rui Sun、Xiao Yang、Yicen Ge、Jintong Song、Xueli Zheng、Maolin Yuan、Ruixiang Li、Hua Chen、Haiyan Fu
DOI:10.1021/acscatal.1c01755
日期:2021.9.17
catalysis which often involves transition-metal complexes, conjugated organic dyes, or electrondonor–acceptorcomplexes, herein, the use of ion-pair charge-transfer (IPCT) complex-induced visible-light photoredox catalytic reactions are described, wherein the cyclization–methoxylation of N-vinyl amides in methanol was achieved under irradiation with blue LEDs. The reaction employs a heteroarenium iodide
Direct N-vinylation of aryl and hetaryl carboxamides with trimethoxyvinylsilane
作者:Pavel Arsenyan、Alla Petrenko、Sergey Belyakov
DOI:10.1016/j.tetlet.2008.06.117
日期:2008.9
A general method for direct N-vinlylation of aryl and hetaryl carboxamides with trimethoxyvinylsilane using a copper(II) acetate-TBAF system as catalyst is elaborated. The yield of N-vinyl amides depends strongly on the initial amide and nature of the solvent. (C) 2008 Elsevier Ltd. All rights reserved.
Vinylation of pyridylcarboxamides with vinyltrimethoxysilane
作者:P. Arsenyan、A. Petrenko、S. Belyakov
DOI:10.1007/s10593-012-0943-0
日期:2012.3
A convenient method has been developed for the direct N-vinylation of pyridylcarboxamides with vinyltrimethoxysilane in the presence of copper(II) acetate and tetrabutylammonium fluoride. The yield of N-vinylamides depends on the nature of the starting amide and the solvent. The molecular structure of the products was confirmed by X-ray structural analysis.
Metal- and Base-Free C(sp<sup>2</sup>)–H Arylsulfonylation of Enamides for Synthesis of (<i>E</i>)-β-Amidovinyl Sulfones via the Insertion of Sulfur Dioxide
作者:Lei Chen、Mi Zhou、Lin Shen、Xiaochun He、Xiong Li、Xuemei Zhang、Zhong Lian
DOI:10.1021/acs.orglett.1c01419
日期:2021.7.2
Nickel‐Catalyzed Asymmetric Synthesis of α‐Arylbenzamides
A nickel‐catalyzedasymmetric reductive hydroarylation of vinyl amides to produce enantioenriched α‐arylbenzamides is reported. The use of a chiral bisimidazoline (BIm) ligand, in combination with diethoxymethylsilane and aryl halides, enables the regioselective introduction of aryl groups to the internal position of the olefin, forging a new stereogenic center α to the N atom. The use of neutral reagents