The Synthesis of Quinoxalines by Condensation Reaction of Acyleins with O-Phenylenediamine Without Solvent Under Microwave Irradiation
作者:Feng Juncai、Liu Yang、Meng Qinghua、Liu Bin
DOI:10.1080/00397919808005709
日期:1998.1
Abstract A convenient synthetic method for 2,3-disubstituted quinoxalines is described. Heating the aryl or alkyl acyloins and o-phenylenediamine in a microwave oven for 3–6 minutes affords 2,3-disubstituted quinoxalines in 20–94% yields.
Stereodivergent asymmetric hydrogenation of quinoxalines
作者:Chenguang Liu、Xufang Liu、Qiang Liu
DOI:10.1016/j.chempr.2023.05.006
日期:2023.9
products, preferably using a catalytic method, is of great interest and importance in both organic synthesis and drug discovery. Herein, we report an unprecedented stereodivergent AH of di-substituted quinoxalines via Mn catalysis, furnishing cis- and rarely accessed trans-chiral tetrahydroquinoxalines (THQs) with high levels of diastereo- and enantioselectivity. This transformation features excellent functional