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
Electrochemical regioselective azidoiodination of alkenes
作者:Wei-qing Yan、Meng-ying Lin、R. Daniel Little、Cheng-Chu Zeng
DOI:10.1016/j.tet.2016.12.058
日期:2017.2
An efficient electrochemical approach to the vicinal iodoazides has been developed through constant current electrolysis of alkenes with NaN3 and NaI in methanol. The reaction is proposed to proceed via a cyclic iodonium intermediate and thereby gives Markovnikov addition products exclusively.
monomer halogen, the need for in situ generation of unstable halogen azides (XN3), applicability to one type of haloazidation and inability to precisely control selectivity. Herein, we developed a universal strategy for haloazidation of alkenes through controlling the reactivity of IBA-N3 by switching halogen salts, allowing for the synthesis of a diversity of halogen azide products. Mechanistic studies