通过铜催化串联环化反应由一嗪和苄基亚甲基丙二醛一锅合成[1,2,4] Triazolo [1,5- a ]吡啶
摘要:
已经发现了一种简单有效的铜催化串联自由基环化反应,用于从易于获得的嗪和苄叉亚甲基腈合成三芳基[1,2,4]三唑并[1,5- a ]吡啶。新的转化涉及多个C H / C C键断裂和C C / C N键形成,以及气态氢和甲烷的挤出。可以将具有不同官能团的多种底物以良好的产率转化为相应的产物。稠合的杂环具有强烈的蓝色荧光,具有大的笔划位移和高的量子产率。
Direct one-potsynthesis of ketazines from secondary alcohols and hydrazinehydrate catalyzed by a ruthenium pincer complex is reported, which proceeds through O–H bond activation of secondary alcohols via amine–amide metal–ligand cooperation in the catalyst. Remarkably, liberated molecular hydrogen and water are the only byproducts.
Rh-Catalyzed Regioselective <i>ortho</i>-C–H Carbenoid Insertion of Diarylazines
作者:Yunliang Yu、Changsheng Kuai、Remi Chauvin、Nian Tian、Shuangshuang Ma、Xiuling Cui
DOI:10.1021/acs.joc.7b01472
日期:2017.8.18
The Rh-catalyzed ortho-C–H carbenoidinsertion reaction of diarylazines with diazo compounds has been developed. A wide range of ortho-substituted diarylazines have been obtained in moderate to high yields with high regioselectivity at room temperature. The hydrolysis of the products could release ketones or aldehydes, giving access to aromatic 1,5-keto-diesters as valuable synthons for further chemical
Azine Synthesis via Nitrogen-Nitrogen Bond Formation
作者:Brian E. Love、Lino Tsai
DOI:10.1080/00397919209409260
日期:1992.11
Abstract Imine anions, generated by reaction of nitrites with organometallic reagents, are dimerized to form symmetrical azines through the use of CuI and t-butyl peroxybenzoate.
摘要 亚胺阴离子由亚硝酸盐与有机金属试剂反应生成,通过使用 CuI 和过苯甲酸叔丁酯二聚形成对称的吖嗪。
Elguero,J. et al., Bulletin de la Societe Chimique de France, 1968, p. 713 - 731
作者:Elguero,J. et al.
DOI:——
日期:——
Rhodium(III)-catalyzed coupling of aromatic ketazines or oximes with 2-vinyloxirane via C–H activation
作者:Jing Wen、An Wu、Yuqin Miao、Jin Zhu
DOI:10.1016/j.tetlet.2015.08.025
日期:2015.10
Described herein is a rhodium(III)-catalyzed coupling of aromatic ketazines or oximes with 2-vinyloxirane via directed C-H activation. This reaction proceeds efficiently under mild conditions with a low catalyst loading, especially in conditions with room temperature in the absence of additives for aromatic ketazines. A wide range of substituted substrates is supported and a possible mechanism is proposed according to the experimental results of kinetic isotopic effect, reversibility studies, and catalysis with rhodacycle intermediate c1. (C) 2015 Elsevier Ltd. All rights reserved.