The Reaction of 1,2-Diones with Ureas-a Synthesis of 4-(1-Substituted)alkylimidazol-2-ones
作者:Andris J. Liepa、Denis M. J. Wright
DOI:10.1071/ch99130
日期:——
The reaction between glyoxal and ureas or thioureas in formic acid in thepresence of sulfinates gives 4-arylsulfonylimidazol-2-ones such as (3b) and(3e). Labile 4-arylsulfonyl-5-hydroxyimidazolidin-2-ones (2a–c) may beisolated. Acyclic or cyclic 1,2-diketones react with ureas in the presence ofselected nucleophiles to give side-chain substituted imidazol-2-ones(5a–e).