Copper(II)-Promoted Oxidation/[3+2]Cycloaddition/Aromatization Cascade: Efficient Synthesis of Tetrasubstituted NH-Pyrrole from Chalcones and Iminodiacetates
作者:Zhang-qi Lin、Chao-dong Li、Zi-chun Zhou、Shuai Xue、Jian-rong Gao、Qing Ye、Yu-jin Li
DOI:10.1055/s-0039-1689972
日期:2019.7
A simple and highly efficient method for the preparation of tetrasubstituted NH-pyrrole from a wide range of chalcones and diethyl iminodiacetates via a Cu(OAc)2-promoted oxidation/[3+2]cycloaddition/aromatization cascade reaction has been developed. This reaction proceeds through dehydrogenations, deamination, and oxidative cyclization, affording the corresponding products in good to excellent yields
开发了一种简单高效的方法,用于通过 Cu(OAc)2 促进的氧化/[3+2] 环加成/芳构化级联反应,从各种查耳酮和亚氨基二乙酸二乙酯制备四取代的 NH-吡咯。该反应通过脱氢、脱氨基和氧化环化进行,以良好的收率提供相应的产物。这种构建四取代 NH-吡咯的简便方法与现有方法相比具有几个优点,例如使用容易获得的查耳酮和容易获得的亚氨基二乙酸二乙酯,以及温和的反应条件。可以容忍多种基材。