A simple, mild, and efficient method for the preparation of α,α-dichloroketones with DCDMH catalyzed by ammonium chloride
作者:Zubiao Zheng、Bingbing Han、Peng Cheng、Jiangxiu Niu、Aidong Wang
DOI:10.1016/j.tet.2014.11.004
日期:2014.12
New process that can selectively prepare α,α-dichloro ketones from various ketones with 1,3-dichloro-5,5-dimethylhydantoin (DCDMH) using ammonium chloride as a catalyst is reported. The effects of ammonium salts, solvents, DCDMH, and reaction temperature were investigated. Under the optimal condition, most of α,α-dichlorinated products were selectively obtained in 86–98% yield.
报道了一种新方法,该方法可以使用氯化铵作为催化剂,用1,3-二氯-5,5-二甲基乙内酰脲(DCDMH)从各种酮中选择性地制备α,α-二氯酮。研究了铵盐,溶剂,DCDMH和反应温度的影响。在最佳条件下,大多数α,α-二氯产品是有选择地获得的,收率为86-98%。