A general DBU-mediated one-pot three-component cycloaddition reaction of easily accessible malonic acid derivatives, nitrosoarenes, and alkenes has been successfully established with the aid of NBS to provide direct access to highly functionalized isoxazolidine derivatives with generally good to excellent yields, broad functional group tolerance, and excellent regio- and diastereo-selectivities under
在
NBS的帮助下,已经成功建立了一种通用的
DBU介导的易于反应的
丙二酸衍
生物,亚硝基
芳烃和烯烃的单锅三组分环加成反应,可直接获得高度官能化的
异恶唑烷衍
生物,收率通常良好至优异,范围广泛功能组耐受性,在温和条件下具有出色的区域选择性和非对映选择性。机制研究表明,bromomalonic酸衍
生物的从
丙二酸衍
生物和
NBS介导形成
DBU促进的硝酮中间体的合成通过与nitrosoarenes bromomalonic酸衍
生物的反应是关键步骤。