Synthesis of Imidazolidinone, Imidazolone, and Benzimidazolone Derivatives through Oxidation Using Copper and Air
作者:Dazhi Li、Thierry Ollevier
DOI:10.1021/acs.orglett.9b00973
日期:2019.5.17
synthetic method of urea derivativesusing copper and air was developed. These mild conditions provided moderate to very good yields for 15 examples (53–93%), while low yields were obtained with sterically hindered substrates (3 examples). The reaction was found to go through an in situ generated copper–N-heterocyclic carbene, which was then oxidized into cyclic urea derivatives possessing alkyl, benzyl