A mild CuBr–NMO oxidative system for the coupling of anilines leading to aromatic azo compounds
作者:Shikha Singh、Parul Chauhan、Makthala Ravi、Isha Taneja、Wahajuddin Wahajuddin、Prem. P. Yadav
DOI:10.1039/c5ra12535a
日期:——
been developed utilizing CuBr with N-methylmorpholine N-oxide (NMO/NMMO) for the oxidative coupling of anilines to access symmetrical and unsymmetrical azocompounds in high yield. The reactivity was found to be governed by electronic and stericfactors of anilines.
CO-n game: An efficient protocol for the palladium-catalyzed carbonylation of azobenzenes is established through C(sp2)−H bond activation with Mo(CO)6 as the solid CO source. Reactions of both symmetrical and unsymmetrical azobenzenes proceed efficiently by this procedure with high regioselectivity. BQ=p-benzoquinone.
Abstract A selective, rapid and simple reduction of azobenzenes to diphenylhydrazines using borane-THF is described.
摘要描述了使用硼烷-THF 选择性、快速和简单地将偶氮苯还原为二苯肼。
Exhaustive Catalytic <i>ortho</i>-Alkoxylation of Azobenzenes: Flexible Access to Functionally Diverse Yellow-Light-Responsive Photoswitches
作者:Adrian Müller-Deku、Oliver Thorn-Seshold
DOI:10.1021/acs.joc.2c02214
日期:2022.12.16
exhaustive ortho-alkoxylation of azobenzenephotoswitches. Alkoxylation is known to improve the photoswitch properties that control azobenzenes’ success in chemical biology or materials sciences, e.g., better completeness of both E → Z and Z → E photoisomerizations and >100 nm red shift of photoresponse. Our method enables straightforward late-stage diversification of photoswitches with interesting functional
Sustainable synthesis of azobenzenes, quinolines and quinoxalines <i>via</i> oxidative dehydrogenative couplings catalysed by reusable transition metal oxide–Bi(<scp>iii</scp>) cooperative catalysts
作者:Marianna Kocsis、Kornélia Baán、Sándor B. Ötvös、Ákos Kukovecz、Zoltán Kónya、Pál Sipos、István Pálinkó、Gábor Varga
DOI:10.1039/d3cy00327b
日期:——
Oxidative dehydrogenativecoupling (ODC) is a useful tool for the formation of new C–C, C–O and NN bonds in an atom-economic and sustainable manner. Although this strategy is versatile, it is much less introduced to prepare N-heterocycles. Herein, we report the oxidative dehydrogenativecoupling of anilines and 2-aminoanilies with vicinal diols to selectively produce azobenzenes (34–95% yield), quinolines