(DMSO)-promoted catalyst-free oxidative C–N coupling and C–O coupling under oxidant-free conditions are outlined. This protocol is operationally simple and leads to various functionalized substituted imidazoles or oxazoles in good yields. To date, a very limited number of oxidation protocols have been established, where DMSO acts solely as a catalyst or an oxidant or both. In this report, DMSO is not only used
One-Pot N-α-C(sp3)–H Bond Functionalisation Cascade for the Synthesis of Polysubstituted Imidazoles
作者:Vikas D. Kadu、Naga Chandradudu Sankala、Mahesh G. Hublikar、Shahaji I. Bansode、Raghunath B. Bhosale
DOI:10.1055/s-0043-1763690
日期:2024.7
A one-pot eco-friendly oxidative N-α-C(sp3)–H bond functionalisation of arylmethylamines for the synthesis of tetrasubstituted imidazoles is demonstrated. The substrate scope of these amines has been well-explored with different substrates, such as 1,2-diketones, an α-hydroxy ketone and phenylacetophenone. In the presence of FeCl3 catalyst and green oxidant O2, the easily accessible substrates afforded tetrasubstituted imidazoles in up to 94% yield.