Palladium-catalyzed selective synthesis of unsymmetrical biaryls from aryl halides or triflates and organomanganese reagents
作者:Eric Riguet、Mouâd Alami、Gérard Cahiez
DOI:10.1016/s0040-4039(97)00940-4
日期:1997.6
Various functionalized unsymmetrical biaryls can be prepared in good to excellent isolated yields by palladium-catalyzed coupling reaction of aryl manganese chloride with aryl iodides, bromides or triflates. The reaction takes place rapidly and cleanly under mild conditions by using only 1% of palladium complexes.
Versatile palladium-catalyzed arylation of organomanganese chlorides by aryl bromides
作者:Eric Riguet、Mouâd Alami、Gérard Cahiez
DOI:10.1016/s0022-328x(00)00891-3
日期:2001.4
In THF, a palladium-catalyzed cross-coupling reaction of organomanganese reagents with various aryl bromides including unreactive deactivated or hindered aryl bromides was performed successfully in the presence of a new catalytic system 1% PdCl2(dppp)-four equivalents DME. The scope of the reaction is very broad since many functional groups are tolerated, moreover, even hindered O,O ' -di- or trisubstituted diaryls were obtained in E;igh yields. It is interesting to note that hindered aryl bromides are more reactive than the corresponding aryl iodides. Alkyl, alkenyl and alkynylmanganese chlorides also react under similar conditions. (C) 2001 Elsevier Science B.V. All rights reserved.