A general and green procedure for the synthesis of organochalcogenides by CuFe2O4nanoparticle catalysed coupling of organoboronic acids and dichalcogenides in PEG-400
A Simple Copper Salt-Catalyzed Synthesis of Unsymmetrical Diaryl Selenides and Tellurides from Arylboronic Acids with Diphenyl Diselenide and Ditelluride
作者:Lei Wang、Min Wang、Fuping Huang
DOI:10.1055/s-2005-871936
日期:——
In the presence of a catalytic amount of simple copper salt, the reaction of arylboronic acids with diphenyl diselenide and ditelluride was accomplished without any additive to afford the corresponding unsymmetrical diarylselenides and tellurides in good yields.
Synthesis of symmetrical and unsymmetrical tellurides <i>via</i> silver catalysis
作者:Bruna Goldani、Manoela do Sacramento、Eder J. Lenardão、Ricardo F. Schumacher、Thiago Barcellos、Diego Alves
DOI:10.1039/c8nj01998c
日期:——
cross-coupling reaction of diaryl ditellurides with aryl boronic acids catalyzed by AgNO3. The general applicability and wide substrate scope make this an interesting method for the synthesis of a series of symmetrical and unsymmetrical diaryl tellurides. This silver-catalyzed protocol tolerates a variety of diaryl ditellurides as well as aryl boronic acids by using only 10 mol% of AgNO3 to provide the desired
我们在这里描述了一种简单有效的方法,用于二芳基二碲化物与AgNO 3催化的芳基硼酸的交叉偶联反应。通用性和广泛的底物范围使该方法成为合成一系列对称和不对称二芳基碲化物的有趣方法。该银催化的方案通过仅使用10 mol%的AgNO 3来耐受多种二芳基二碲化物和芳基硼酸,从而以高收率提供所需的产物。通过高分辨率质谱分析提出了该反应机理,并可以检测出活性的(PhTe)2 Ag III中间体。
Microwave-Assisted Copper-Catalyzed Preparation of Diaryl Chalcogenides
作者:Sangit Kumar、Lars Engman
DOI:10.1021/jo060690a
日期:2006.7.1
Diaryl chalcogenide synthesis employing diaryl dichalcogenides and aryl halides as starting materials in the presence of excess magnesium and a catalytic amount of CuI/bipyridyl is significantly improved by microwave heating. Reaction times can be reduced from 2 to 3 days to 6−8 h. Both arylbromides and aryl chlorides can be used as substrates in the substitution reaction. The procedure is useful
Microwave-assisted reaction of aryl diazonium fluoroborate and diaryl dichalcogenides in dimethyl carbonate: a general procedure for the synthesis of unsymmetrical diaryl chalcogenides
作者:Debasish Kundu、Sabir Ahammed、Brindaban C. Ranu
DOI:10.1039/c2gc35328h
日期:——
A convenient, general and efficient procedure for the synthesis of unsymmetrical diaryl chalcogenides has been developed by the reaction of aryl diazonium fluoroborates and diaryl dichalcogenides in the presence of zinc dust in dimethyl carbonate under microwave irradiation. The reactions of a wide range of substituted aryl diazonium fluoroborates and diaryl dichalcogenides have been addressed. The
A light-mediated C−Se bond coupling reaction of arylhalides with diselenides under mild photocatalyst-free conditions for preparing aryl selenoethers has been achieved. The transformation is charactered by readily available materials, mild conditions, broad substrate scope and high efficiency. A reasonable mechanism has been proposed based on the preliminary mechanistic investigation. The protocol