Transition-Metal-Free HFIP-Mediated Organo Chalcogenylation of Arenes/Indoles with Thio-/Selenocyanates
作者:Pratibha Kalaramna、Avijit Goswami
DOI:10.1021/acs.joc.1c00478
日期:2021.7.16
developed a protocol for the synthesis of diaryl thio-/selenoethers by the reaction of aryl chalcogenocyanates with electron rich arenes/hetero arenes via HFIP promoted C–H activation. The reaction produces chalcogenides in good to excellent yields undermildconditions without the need of a transition metal as a catalyst. The HFIP-mediated reactions tolerated a wide range of functional groups and set the stage
The ionic liquid 1-butyl-3-methylimidazolium methylselenite, [bmim][SeO2(OCH3)], was successfully used as solvent in the catalyst-free preparation of 3-arylselenylindoles by the reaction of indole with ArSeCl at room temperature. The products were obtained selectively in good yields without the need of any additive and the solvent was easily reused for several cycles with good results.
Efficient synthesis of 3-selanyl- and 3-sulfanylindoles employing trichloroisocyanuric acid and dichalcogenides
作者:Claudio C. Silveira、Samuel R. Mendes、Lucas Wolf、Guilherme M. Martins、Lisandro von Mühlen
DOI:10.1016/j.tet.2012.09.022
日期:2012.12
3-Arylselanyl- and 3-arylsulfanylindoles were prepared in EtOAc, by the reaction of indole with the diaryl dichalcogenide-trichloroisocyanuric acid (TCCA) reagent system. The products were efficiently and conveniently obtained, at room temperature and in short reaction times. (C) 2012 Elsevier Ltd. All rights reserved.