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
AbstractAn approach to the vicinal oxyazidation of alkenes has been achieved under mild and transition metal‐free conditions. This method utilizes NaN3 as the azidation agent and 2,2,6,6‐tetramethylpiperidine‐1‐oxoammonium tetrafluoroborate (TEMPO+BF4−) as the single‐electron oxidant as well as the oxygen source. By using this protocol, various β‐aminooxy azides were synthesized and several complex bioactive molecules were functionalized.magnified image