catalyst, the phasetransfercatalyzedmethod of oxidation of primary amines to symmetricalazobenzenes with a saturated solution of potassium ferricyanide in 2N aqueous potassium hydroxide and dichloromethane is described for the first time in this paper. The reaction has intimate relation with Hammett substituent constants. This report offers an efficient and rapid method to prepareazobenzenes and a possible
The palladium and copper contrast: a twist to products of different chemotypes and altered mechanistic pathways
作者:Kapileswar Seth、Sudipta Raha Roy、Asim Kumar、Asit K. Chakraborti
DOI:10.1039/c6cy00415f
日期:——
Unprecedented Pd–Ag/Cu–Ag nanocluster-catalyst switch leads to a phenazine/azoarene twist for non-radical mode C–H activation vs. radical mode N–N self-coupling of anilines.
作者:Shire Elmi、Per Heggen、Bjarte Holmelid、Didrik Malthe-Sørensen、Leiv K. Sydnes
DOI:10.1080/00304948.2016.1206425
日期:2016.9.2
conditions 2a was not formed at all and a complex product mixture was obtained from which the only reasonably pure product isolated in low yield (4%) was 2,20,4,40-tetramethylazobenzene (3a). The iodination of benzene derivatives is influenced by the nature of the substituents. It was therefore of interest to investigate the reaction of some activated and deactivated aniline derivatives under the conditions
Transition Metal-Free Oxidative Coupling of Primary Amines in Polyethylene Glycol at Room Temperature: Synthesis of Imines, Azobenzenes, Benzothiazoles, and Disulfides
作者:Abhinandan D. Hudwekar、Praveen K. Verma、Jaspreet Kour、Shilpi Balgotra、Sanghapal D. Sawant
DOI:10.1002/ejoc.201801610
日期:2019.2.14
A transition metal‐free protocol has been developed for the oxidativecoupling of primary amines to imines and azobenzenes, thiols to disulfides, and 2‐aminothiophenols to benzothiazoles, offering excellent yields. The advantageous features of the present environmentally benign methodology include the usage of biocompatable and green reaction conditions such as solvent, room temperature reactions,