General microwave-assisted protocols for the expedient synthesis of quinoxalines and heterocyclic pyrazines
作者:Zhijian Zhao、David D Wisnoski、Scott E Wolkenberg、William H Leister、Yi Wang、Craig W Lindsley
DOI:10.1016/j.tetlet.2004.04.144
日期:2004.6
Functionalizedquinoxalines and heterocyclic pyrazines are expediently prepared in excellent yields (69–99%) from common 1,2-diketone intermediates under microwave irradiation. In addition to being general for a variety of aryl/heteroaryl 1,2-diamines and 1,2-diketones, this protocol suppresses the formation of polymeric species, characteristic of traditional thermal conditions.