Pd(II)-Catalyzed Aerobic Intermolecular 1,2-Diamination of Conjugated Dienes: A Regio- and Chemoselective [4 + 2] Annulation for the Synthesis of Tetrahydroquinoxalines
作者:Zhengxing Wu、Ke Wen、Jingang Zhang、Wanbin Zhang
DOI:10.1021/acs.orglett.7b00919
日期:2017.6.2
A Pd(II)-catalyzed aerobic intermolecular 1,2-diamination of conjugateddienes was developed for the regio- and chemoselective preparation of a variety of functionalized tetrahydroquinoxalines, using simple sulfonyl protected o-phenylendiamines as a nitrogen source. This methodology provides a direct and efficient synthesis of tetrahydroquinoxalines. O2 was used as the stoichiometric oxidant, and reaction