摘要 描述了一种通过Cu(I)催化的乙烯基硒化物的环化反应获得2-芳基硒基苯并[ b ]硫属元素衍生物的有效方案。关键的乙烯基硒化物可以容易地由适当官能化的1,1-二溴苯乙烯制备,并且该方法允许以中等至优异的产率合成2-芳基硒基呋喃,-噻吩和-硒代苯。 描述了一种通过Cu(I)催化的乙烯基硒化物的环化反应获得2-芳基硒基苯并[ b ]硫属元素衍生物的有效方案。关键的乙烯基硒化物可以容易地由适当官能化的1,1-二溴苯乙烯制备,并且该方法允许以中等至优异的产率合成2-芳基硒基呋喃,-噻吩和-硒代苯。
Glycerol as a promoting medium for cross-coupling reactions of diaryl diselenides with vinyl bromides
作者:Loren C. Gonçalves、Gabriela F. Fiss、Gelson Perin、Diego Alves、Raquel G. Jacob、Eder J. Lenardão
DOI:10.1016/j.tetlet.2010.10.107
日期:2010.12
herein the use of glycerol as a novel solvent in the cross-coupling reaction of diaryl diselenides with vinyl bromides catalyzed by CuI. This cross-coupling reaction was performed with diaryl diselenides and (Z)- or (E)-vinyl bromides bearing electron-withdrawing and electron-donating groups, affording the corresponding vinyl selenides in good to excellent yields. The mixture glycerol/catalyst can be
Hydrothiolation of terminal alkynes with diaryl disulfides and diphenyl diselenide: selective synthesis of (Z)-1-alkenyl sulfides and selenides
作者:Zhang-Lin Wang、Ri-Yuan Tang、Pei-Song Luo、Chen-Liang Deng、Ping Zhong、Jin-Heng Li
DOI:10.1016/j.tet.2008.09.022
日期:2008.11
A simple, stereoselective and efficient method for the hydrothiolation of terminal alkynes with diaryl disulfides and diphenyl diselenide has been developed. In the presence of Cul, rongalite, and Cs2CO3, a variety Of disulfides Underwent the reaction of terminal alkynes stereoselectively to afford the corresponding (Z)-1-alkenyl sulfides in moderate to excellent yields. it is noteworthy that hydroselenations of 1,2-diphenyldiselane with alkynes are also conducted smoothly to afford (Z)-1-alkenyl selenides in good yields under the standard conditions. (C) 2008 Elsevier Ltd. All rights reserved.