Oxidant- and additive-free simple synthesis of 1,1,2-triiodostyrenes by one-pot decaroboxylative iodination of propiolic acids
作者:Subhankar Ghosh、Rajat Ghosh、Shital K. Chattopadhyay
DOI:10.1016/j.tetlet.2020.152378
日期:2020.10
A metal- and oxidant-free facile synthesis of a range of 1,1,2-triiodostryrene derivatives has been developed which utilizes a simple decarboxylative triiodination of propiolicacids using molecular iodine and sodium acetate in a one-pot manner. Electron-withdrawing or donating substituents in the aryl rings display marginal influence on the course of the reaction. Mechanistic investigation reveals
Oxyhalogenation reactions of a variety of alkynylsilanes were studied using oxone as mild oxidant and KCl, KBr, and KI as halogen sources. In this study, reaction of an alkynylsilane with oxone-KX (X = Cl or Br) produced trichloromethyl/tribromomethyl ketones in high yields. Under similar conditions, however, reactions of alkynylsilanes with oxone-KI were found to give exclusively 1,2,2-triiodovinyl
Hypervalent Iodine Mediated Chemoselective Iodination of Alkynes
作者:Yan Liu、Daya Huang、Ju Huang、Keiji Maruoka
DOI:10.1021/acs.joc.7b01555
日期:2017.11.17
herein are practical approaches for the chemoselective mono-, di-, and tri-iodination of alkynes based on efficient oxidative iodinationscatalyzed by hypervalent iodine reagents. The reaction conditions were systematically optimized by altering the iodine source and/or the hypervalent iodine reagent system. The tetrabutylammonium iodide (TBAI)/(diacetoxyiodo)benzene (PIDA) system is specific for monoiodination