Dioxazoles, a new mild nitrene transfer reagent in gold catalysis: highly efficient synthesis of functionalized oxazoles
作者:Ming Chen、Ning Sun、Haoyi Chen、Yuanhong Liu
DOI:10.1039/c6cc02776h
日期:——
A gold-catalyzed regioselective [3+2] cycloaddition of ynamides with 1,4,2-dioxazoles has been developed, which offers a novel approach to highly functionalized oxazoles under mild reaction conditions. 1,4,2-Dioxazole was found to act...
Tf<sub>2</sub>NH-Catalyzed Formal [3 + 2] Cycloaddition of Ynamides with Dioxazoles: A Metal-Free Approach to Polysubstituted 4-Aminooxazoles
作者:Yingying Zhao、Yancheng Hu、Chunxiang Wang、Xincheng Li、Boshun Wan
DOI:10.1021/acs.joc.7b00076
日期:2017.4.7
An unprecedented Tf2NH-catalyzed formal [3 + 2] cycloaddition of ynamides with dioxazoles was developed to construct various polysubstituted 4-aminooxazoles. This approach features a metal-free catalytic bimolecular assembly of oxazole motifs, a low-cost catalyst, exceptionally mild reaction conditions, a very short reaction time, a broad substrate scope, and high efficiency. This metal-free protocol