Potassium Carbonate Catalyzed Regioselective Aminohalogenation of β-Nitrostyrenes by Using Benzyl Carbamate/N-Chlorosuccinimide as a New Nitrogen/Chlorine Source
作者:Jianlin Han、Yi Pan、Xiaoyun Ji、Haibo Mei、Yu Qian、Guigen Li
DOI:10.1055/s-0030-1260245
日期:2011.11
A combination of benzyl carbamate and N-chlorosuccinimide was developed as a new system for aminohalogenation of β-nitrostyrenes catalyzed by potassium carbonate in dichloromethane at room temperature. The reaction tolerates a wide range of substituents on the β-nitrostyrene, and proceeds smoothly in good-to-excellent chemical yields (77-99%). The new system shows a high efficiency and it markedly
氨基甲酸苄酯和N-氯代琥珀酰亚胺的组合被开发为室温下碳酸钾在二氯甲烷中催化β-硝基苯乙烯氨基卤化的新系统。该反应可耐受β-硝基苯乙烯上的多种取代基,并以良好至优异的化学收率(77-99%)平稳进行。新系统显示出高效率,并显着缩短了氨基氯化反应的时间。N,N-二氯苄基氨基甲酸酯也被发现是氨基卤化反应中氮和氯的高效来源。 胺化-氯化-烯烃-氨基甲酸酯-酰胺