Synthesis of α,β-unsaturated aryl esters via Heck reaction of unsymmetrical aryl tellurides
摘要:
A variety of alpha,beta-unsaturated aryl esters were prepared by the direct reaction of unsymmetrical aryltellurides and ethyl acrylate, catalyzed by PdCl2 via a Heck cross-coupling reaction. (C) 2009 Elsevier Ltd. All rights reserved.
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。
C–Te Cross-Coupling of Diaryl Ditellurides with Arylboronic Acids by Using Copper(I) Thiophene-2-carboxylate under Mild Conditions
arylboronic acids by usingcopper(I) thiophene-2-carboxylate (CuTC) under mild conditions. Although other studies have reported that highly polar solvents (such as DMSO) or bases are required, this reaction was completed by using CuTC and common solvents under neutral conditions at room temperature. This cross-coupling reaction was performed with diaryl ditellurides and arylboronic acids bearing various
Synthesis of α,β-unsaturated aryl esters via Heck reaction of unsymmetrical aryl tellurides
作者:Hélio A. Stefani、Jesus M. Pena、Kemilla Gueogjian、Nicola Petragnani、Boniek G. Vaz、Marcos N. Eberlin
DOI:10.1016/j.tetlet.2009.07.092
日期:2009.10
A variety of alpha,beta-unsaturated aryl esters were prepared by the direct reaction of unsymmetrical aryltellurides and ethyl acrylate, catalyzed by PdCl2 via a Heck cross-coupling reaction. (C) 2009 Elsevier Ltd. All rights reserved.