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Palladium Nanoparticles Supported on Sulfonic Acid Functionalized Silica as Trifunctional Heterogeneous Catalysts for Heck and Suzuki Reactions
Author(s) -
Oger Nicolas,
Le Grognec Erwan,
Felpin FrançoisXavier
Publication year - 2015
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201500179
Subject(s) - sulfonic acid , chemistry , catalysis , aryl , palladium , suzuki reaction , polymer chemistry , salt (chemistry) , organic chemistry , boronic acid , adsorption , heterogeneous catalysis , alkyl
The arylation of acrylates and boronic acids with anilines, through in situ generated aryl diazonium salts, was successfully achieved by using trifunctional heterogeneous catalysts bearing Brønsted acid and metal active sites. The trifunctional materials were prepared by adsorption of palladium nanoparticles, generated by reduction of a solution of Pd(OAc) 2 onto a commercially available sulfonic acid functionalized silica. These new trifunctional catalysts act as a 1) proton donor for the diazotization step, 2) counterion for the diazonium salt, and 3) Pd source for the coupling step. This unprecedented strategy, features mild and safe conditions as hazardous aryl diazonium salts are generated in situ and only produces environmentally friendly byproducts such as t BuOH, H 2 O, and N 2 .