Iron-Catalyzed Synthesis of 2<i>H</i>-Imidazoles from Oxime Acetates and Vinyl Azides under Redox-Neutral Conditions
作者:Zhongzhi Zhu、Xiaodong Tang、Jianxiao Li、Xianwei Li、Wanqing Wu、Guohua Deng、Huanfeng Jiang
DOI:10.1021/acs.orglett.7b00203
日期:2017.3.17
A novel and versatile method for the synthesis of 2H-imidazoles via iron-catalyzed [3 + 2] annulation from readily available oxime acetates with vinyl azides has been developed. This denitrogenative process involved N–O/N–N bond cleavages and two C–N bond formations to furnish 2,4-substituted 2H-imidazoles. This protocol was performed under mild reaction conditions and needed no additives or ligands
已开发出一种新颖且通用的方法,该方法通过铁催化的[3 + 2]环合反应从易于获得的肟肟与叠氮化乙烯中合成2 H-咪唑。该脱氮过程涉及N–O / N–N键断裂和两个C–N键形成,以提供2,4-取代的2 H-咪唑。该方案在温和的反应条件下进行,不需要添加剂或配体。此外,这是绿色反应,涉及乙酸肟肟作为内部氧化剂,乙酸和氮作为副产物。