K<sub>3</sub>PO<sub>4</sub>-Catalyzed Regiospecific Aminobromination of β-Nitrostyrene Derivatives with <i>N</i>-Bromoacetamide as Aminobrominating Agent
作者:Zhan-Guo Chen、Yun Wang、Jun-Fa Wei、Peng-Fei Zhao、Xian-Ying Shi
DOI:10.1021/jo9026879
日期:2010.3.19
A very simple, efficient, and regiospecific protocol for aminobromination of a wide scope of β-nitrostyrenederivatives with N-bromoacetamide (NBA) as nitrogen/bromine sources has been developed by using K3PO4 as catalyst. The reaction proceeded smoothly and cleanly to give the bromoamines in good to excellent yields (78−99%) within 24 h in CH2Cl2 at room temperature without protection of inert gases
通过使用K 3 PO 4作为催化剂,已经开发出一种非常简单,有效且具有区域特异性的方案,用于使用N-溴乙酰胺(NBA)作为氮/溴源对多种β-硝基苯乙烯衍生物进行氨基溴化。反应平稳,干净地进行,在室温下于CH 2 Cl 2中于24 h内以良好的优良收率(78-99%)得到溴胺,而无需保护惰性气体。提出了可能的机制,涉及亲核缀合物加成。
A Metal-Free Three-Component Reaction of <i>trans</i>-β-Nitrostyrene Derivatives, Dibromo Amides, and Amines Leading to Functionalized Amidines
作者:Meng Zhou、Jinlei Li、Chao Tian、Xiao Sun、Xiaoting Zhu、Yaohang Cheng、Guanghui An、Guangming Li
DOI:10.1021/acs.joc.8b02998
日期:2019.1.18
metal-free, and multicomponent route for the preparation of N-acyl amidinesfrom nitroalkene derivatives, dibromo amides, and amines has been developed that accesses an initial α,α-dibromonitroalkane intermediate that can undergo C–C bond cleavage. This protocol offers an alternative approach toward N-acyl amidines and features the rapid construction of amidine frameworks with high diversity and complexity