Atmosphere- and Temperature-Controlled Regioselective Aminobromination of Olefins
作者:Wesley Zongrong Yu、Yi An Cheng、Ming Wah Wong、Ying-Yeung Yeung
DOI:10.1002/adsc.201600821
日期:2017.1.19
A complete switch of regioselectivity in the aminobromination of olefins is realized from delicate changes in the reaction temperature from 25 °C to 40 °C and the atmosphere from air to argon, under catalyst‐free conditions. The resulting α‐bromoamides can be transformed easily to high‐value compounds (e.g., Clobenzorex). Mechanistic studies revealed that the reaction went through a radical pathway
在无催化剂条件下,反应温度从25°C到40°C以及气氛从空气到氩气的微妙变化,可以实现烯烃氨基溴化中区域选择性的完全转换。所得的α-溴酰胺可轻松转化为高价值化合物(例如,氯苯并re)。机理研究表明,该反应经历了由原位生成的溴(甲苯磺酰基)胺(TsNHBr)控制的自由基途径。