Rhodium-Catalyzed Regiodivergent [3 + 2] and [5 + 2] Cycloadditions of Quinolinium Ylides with Alkynes
作者:Min He、Nuan Chen、Jian Wang、Shiyong Peng
DOI:10.1021/acs.orglett.9b01765
日期:2019.7.5
Rhodium-catalyzed regiodivergent [3 + 2] and [5 + 2] cycloadditions of quinolinium ylides with alkynes are reported, providing highly functionalized five-membered indolizine derivatives and seven-membered 1,4-oxazepine compounds, respectively, in moderate to excellent yields under mild reaction conditions. Importantly, quinolinium ylides are derived from donor–acceptor diazo compounds, and different
据报道,铑催化的喹啉鎓叶立德与炔烃的区域扩散性[3 + 2]和[5 + 2]环加成反应,分别以中等至极好的收率提供了高度官能化的五元吲哚并嗪衍生物和七元1,4-氧杂氮平化合物。在温和的反应条件下。重要的是,喹啉鎓的烷基化物是从供体-受体重氮化合物衍生而来的,不同类型的供体-受体重氮化合物对反应具有不同的选择性和反应性。[3 + 2]环加成反应涉及一个不寻常的1,3-酯迁移过程。