Photoswitchable Regiodivergent Azidation of Olefins with Sulfonium Iodate(I) Reagent
作者:Dodla S. Rao、Thurpu R. Reddy、Aakanksha Gurawa、Manoj Kumar、Sudhir Kashyap
DOI:10.1021/acs.orglett.9b03910
日期:2019.12.20
Photoswitchable strategy for selective azidation of structurally diverse olefins under transition-metal-free conditions is reported. The unprecedented reactivity of trimethylsulfonium [bis(azido)iodate(I)] species under visible light allows radical azidooxygenation of the C═C π bond with distinctive selectivity. In the absence of visible light, the reaction proceeds through an ionic intermediate which
据报道,在无过渡金属条件下,采用光开关策略可选择性叠氮化结构多样的烯烃。三甲基ulf [双(叠氮基碘酸盐)(I)]在可见光下具有空前的反应性,可实现C═Cπ键的自由基叠氮加氧,并具有独特的选择性。在不存在可见光的情况下,反应通过离子中间体进行,该离子中间体导致互补的区域选择性以提供α-烷基叠氮化物。机理研究表明,涉及自由基或离子途径的光控区域发散叠氮化可以通过唯一的区域选择性来实现。