Sulfonamide-Directed Chemo- and Site-Selective Oxidative Halogenation/Amination Using Halogenating Reagents Generated in Situ from Cyclic Diacyl Peroxides
作者:Denghu Chang、Rong Zhao、Congyin Wei、Yuan Yao、Yang Liu、Lei Shi
DOI:10.1021/acs.joc.8b00243
日期:2018.3.16
The combination of cyclic diacyl peroxides with commercially available halide salts as a unique halogenating system is utilized in Hofmann–Löffler–Freytag-type reaction. This strategy allows for the formation of N-chloroamides, δ-brominated products, and even biologically relevant pyrrolidines under mild conditions in moderate to excellent yields. Meanwhile, the preliminary structure of the in situ
霍夫曼–勒夫勒–弗雷塔格型反应采用环状二酰基过氧化物与市售卤化物盐的组合作为独特的卤化系统。该策略允许在温和条件下以中等至极好的收率形成N-氯酰胺,δ-溴化产物,甚至生物学上相关的吡咯烷。同时,通过NMR和UV / vis分析研究了原位形成的溴化剂的初步结构。