Ni Nanoparticles: Mild and Efficient Catalyst for the Chemoselective Synthesis of 2-Arylbenzimidazoles, 2-Arylbenzothiazoles, and Azomethines
作者:Jitender M. Khurana、Sneha、Kanika Vij
DOI:10.1080/00397911.2011.563404
日期:2012.9
A new and efficient method has been developed for the synthesis of biologically significant 2-arylbenzimidazoles, 2-arylbenzothiazoles, and azomethines using recyclable and inexpensive polyvinyl pyrrolidone (PVP)-stabilized Ni nanoparticles in ethylene glycol at room temperature in excellent yields.
Synthesis of 2-Aminoquinoxalines via One-Pot Cyanide-Based Sequential Reaction under Aerobic Oxidation Conditions
作者:Yeon-Ho Cho、Kyung-Hee Kim、Cheol-Hong Cheon
DOI:10.1021/jo4021908
日期:2014.2.7
A highly efficient synthesis of 2-aminoquinoxalines has been developed via the one-pot two-step cyanide-mediated sequential reactions of ortho-phenylenediamines with aldehydes under aerobic oxidation conditions. A variety of substrates, including aliphatic aldehydes bearing acidic a-protons, are applicable to this protocol and afford the desired 2-aminoquinoxalines in high yields.