文献类型：期刊文献

英文题名：Ytterbium triflate catalyzed heterocyclization of 1,2-phenylenediamines and alkyl oxalates under solvent-free conditions via Phillips reaction: A facile synthesis of quinoxaline-2,3-diones derivatives

作者：Wang, Limin[1,3]; Liu, Jijun[1]; Tian, He[1]; Qian, Changtao[2]

机构：[1]E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Shanghai Inst Organ Chem, Lab Organomet Chem, Shanghai, Peoples R China

年份：2004

卷号：34

期号：8

起止页码：1349

外文期刊名：SYNTHETIC COMMUNICATIONS

收录：;EI(收录号：20242616544033);WOS:【SCI-EXPANDED(收录号:WOS:000221625900001)，CCR-EXPANDED(收录号:WOS:000221625900001)】；

语种：英文

外文关键词：quinoxaline-2,3-diones; Yb(OTf)(3); solvent-free synthesis; Phillips reaction

摘要：Ytterbium triflate are found to catalyze efficiently the Phillips-type heterocyclization reactions of 1,2-phenylenediamine and alkyl oxalate under solvent-free and mild conditions to afford to the corresponding quinoxaline-2,3-dione derivatives in high yields. The catalyst could be recovered almost quantitatively from the aqueous layer after the reaction was completed and it could be reused in subsequent reaction without decrease in activity.