Cesium hydroxide-catalyzed hydrothiolation of alkynyl selenides to highly stereo- and regioselectively synthesize (Z)-1-organoseleno-2-arylthio-1-alkenes
摘要:
In the presence of catalytic amount of cesium hydroxide the hydrothiolation of alkynyl selenides occurred at room temperature in DMF under nitrogen atmosphere to give exclusive (Z)-1-organoseleno-2-arylthio-1-alkene in excellent yields. It could provide a new and expedient way for the preparation of (Z)-1-arylseleno-2-arylthio-1-alkene. (C) 2011 Xin Hua Xu. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
A highly chemo-, regio-, and stereoselective method for the synthesis of (Z)-vinylic selenosulfides and (Z)-vinylic tellurosulfides in a one-pot reaction of terminal alkynes, diaryl disulfides, and diaryl diselenides (ditellurides) catalyzed by simple base cesiumhydroxide monohydrate is described. Due to the different activities of the carbon–chalcogen bonds, the target products cleave selectively