Rh(III)-catalyzed aromatic C–H bond carbenoid functionalization of triazenes by α-diazomalonate
摘要:
A Rh(III)-catalyzed aromatic C-H bond carbenoid functionalization of triazenes by alpha-diazomalonates has been developed, with features of mild reaction condition and high efficiency. Furthermore, the functionalized triazenes could be subject to divergent synthesis. (C) 2015 Elsevier Ltd. All rights reserved.
The controllable C2 arylation and C3 diazenylation of indoles with aryltriazenes under ambient conditions was investigated.
对苯基三氮烯与吲哚在常温条件下的可控C2芳基化和C3重氮化进行了研究。
One-Pot Synthesis of Trisubstituted Triazenes from Grignard Reagents and Organic Azides
作者:Abdusalom A. Suleymanov、Rosario Scopelliti、Farzaneh Fadaei Tirani、Kay Severin
DOI:10.1021/acs.orglett.8b01214
日期:2018.6.1
and versatile method for the preparation of linear, trisubstituted triazenes is reported. The procedure is based on the reaction of Grignard reagents with 1-azido-4-iodobutane or 4-azidobutyl-4-methylbenzenesulfonate. These organic azides enable the regioselective formation of triazenes via an intramolecular cyclization step. The new method can be used for the preparation of aryl, heteroaryl, vinyl,
General and Efficient Synthesis of Indoles through Triazene-Directed C-H Annulation
作者:Chengming Wang、Huan Sun、Yan Fang、Yong Huang
DOI:10.1002/anie.201301742
日期:2013.5.27
Unprotected indoles are prepared with the title method, which has a wide scope for alkynes. Excellent regioselectivity was accomplished for aryl–alkyl and alkyl–alkyl disubstituted acetylenes. This reaction features an unusual 1,2 rhodium migration and ring‐contraction‐triggered NN bond cleavage. It allows rapid conversion of the reaction products into several functional molecules.
An environmentally friendly approach to the green synthesis of azo dyes with aryltriazenes via ionic liquid promoted C-N bonds formation
作者:Yonghong Zhang、Yonghong Liu、Xiaoqian Ma、Xia Ma、Bin Wang、Hongguang Li、Yan Huang、Chenjiang Liu
DOI:10.1016/j.dyepig.2018.05.073
日期:2018.11
An efficient and green approach for the synthesis of azo dyes has been developed via the Brønsted acidic ionicliquid (IL) promoted diazo coupling reaction of naphthols with aryltriazenes. The reaction was carried out with the aryltriazenes as diazotizing agents, the Brønsted acidic ionicliquids as the promoter, and water as the green solvent at room temperature under air and metal-free conditions
Kinetic Studies on the Thermal <i>cis</i>-to-<i>trans</i> Isomerization of 1-Phenyltriazenes Derived from Cyclic Amines
作者:Jinlong Fu、Kelvin Lau、Mónica Barra
DOI:10.1021/jo8024048
日期:2009.2.20
Rate constants for thermal cis-to-trans isomerization of N-(phenylazo)-substituted nitrogen ring heterocyles were determined as a function of phenyl ring substitution, cyclic amine ring size, and organic solvents. Observed first-order rate constants are found to increase with increasing electron-withdrawing character of the para substituent, with larger amine rings, and with increasing solvent polarity