Synthesis of 3-benzylquinoxalin-2(1H)-ones and 4-formyl-3-benzyl-3,4-dihydroquinoxalin-2(1H)-ones from 3-aryloxirane-2-carboxamides via 5-arylidene-2,2-dimethyl-1,3-oxazolidin-4-ones
摘要:
A facile and highly efficient strategy has been delineated for the synthesis of 3-benzylquinoxalin-2(1H)-ones and their partially reduced N-formyl derivatives via a Hinsberg-Körner type cyclo-annulation reaction using 5-arylidene-2,2-dimethyl-1,3-oxazolidin-4-ones as pyruvate surrogates. 3-Benzylquinoxalin-2(1H)-ones with a wide range of substituents in both the benzyl moiety and the quinoxaline ring
Microwave-Assisted Solvent-Dependent Reaction: Chemoselective Synthesis of Quinoxalin-2(1<i>H</i>)-ones, Benzo[<i>d</i>]imidazoles and Dipeptides
作者:Shu-Liang Wang、Jie Ding、Bo Jiang、Yuan Gao、Shu-Jiang Tu
DOI:10.1021/co2001247
日期:2011.9.12
A microwave-assisted solvent-dependentchemoselective reaction dealing with 4-arylidene-2-phenyloxazol-5-ones and diverse ortho-diamines to achieve three types of molecular scaffolds, 3-benzylquinoxalin-2(1H)-ones, benzimidazole and β-amino dipeptides is reported. The procedures feature short reaction time, good to excellent yields, operational simplicity, as well as easily available starting materials