Copper-Catalyzed Aerobic Oxidative Dehydrogenative Coupling of Anilines Leading to Aromatic Azo Compounds using Dioxygen as an Oxidant
作者:Chun Zhang、Ning Jiao
DOI:10.1002/anie.201001651
日期:2010.8.16
In the air tonight: A novel approach to symmetric and unsymmetric aromatic azo compounds from simple anilines catalyzed by inexpensive CuBr has been disclosed. Air (or dioxygen) was used as an oxidant under mild reaction conditions, with H2O as the byproduct, to make this transformation environmentally benign and very easy to handle.
Selective Rhodium-Catalyzed C–H Amidation of Azobenzenes with Dioxazolones under Mild Conditions
作者:Bomi Jeon、Uiseong Yeon、Jeong-Yu Son、Phil Ho Lee
DOI:10.1021/acs.orglett.6b02250
日期:2016.9.16
A synthetic method for a wide range of amidated azobenzenes is developed from the selective rhodium-catalyzed C–H amidation reaction of symmetrical as well as unsymmetrical azobenzenes with alkyl-, aryl-, and heteroaryl-substituted dioxazolones undermildconditions. Diamidation of azobenzenes and amidation of monoamidated azobenzenes were also demonstrated.
Rhodium-Catalyzed Direct <i>ortho</i> C–N Bond Formation of Aromatic Azo Compounds with Azides
作者:Hao Wang、Yang Yu、Xiaohu Hong、Qitao Tan、Bin Xu
DOI:10.1021/jo500412w
日期:2014.4.4
An efficient rhodium-catalyzed regioselective C-N bond formation of azo compounds in good to excellent yields through C-H bond functionalization using azides as the nitrogen source was developed. Alkyl, aryl, and sulfonyl azides could be efficiently assembled in this reaction with excellent functional group tolerance.
First use of p-tert-butylcalix[4]arene-tetra-O-acetate as a nanoreactor having tunable selectivity towards cross azo-compounds by trapping silver ions
作者:Piyali Sarkar、Chhanda Mukhopadhyay
DOI:10.1039/c5gc01859e
日期:——
p-tert-Butylcalix[4]arene-tetra-O-acetate was established for the first time as a member of the nanoreactor series, even without having any –OH group.
The introduction of methyl groups into two ortho positions (2â² and 6â² positions) of the same benzene ring in an azobenzene remarkably raised both its photoregulation ability and the thermal stability of the cis-form.