Beckmann rearrangement of ketoximes promoted by cyanuric chloride and dimethyl sulfoxide under a mild condition
作者:Ruonan Ma、Xueyuan Chen、Zhiyin Xiao、Mookan Natarajan、Chunxin Lu、Xiujuan Jiang、Wei Zhong、Xiaoming Liu
DOI:10.1016/j.tetlet.2020.152707
日期:2021.1
Synthesis of amides via Beckmann rearrangement of ketoximes promoted by cyanuric chloride (TCT)/DMSO under mild conditions has been reported. Conditions of the Beckmann rearrangement, e.g., solvents, the ratios of TCT/DMSO, and the temperature, were investigated using diphenylmethanone oxime as a substrate. The optimized conditions were adopted to afford fourteen amides with yields ranging from 20%
酰胺的合成通过在温和条件下DMSO已经报道/由氰尿酰氯(TCT)促进酮肟的贝克曼重排。使用二苯甲酮肟作为底物,研究贝克曼重排的条件,例如溶剂,TCT / DMSO的比例和温度。采用优化的条件得到十四种酰胺,收率范围为20%至99%。根据质谱分析,提出了一种涉及活性二甲基烷氧基s中间体的合理机理。据我们所知,这是第一个研究TCT / DMSO在温和条件下促进酮肟的贝克曼重排以有效提供酰胺的案例。