Development of an Amphiphilic Resin-Dispersion of Nanopalladium and Nanoplatinum Catalysts: Design, Preparation, and Their Use in Green Organic Transformations

An amphiphilic polymer resin-dispersion of nanoparticles of palladium was designed and prepared with a view toward use for catalysis in water. The amphiphilic polystyrene-poly(ethylene glycol) (PS-PEG) resin-dispersion of nanoparticles of palladium exhibited high catalytic performance in the hydrodechlorination of chloroarenes under aqueous conditions. The amphiphilic resin-supported nanopalladium and nanoplatinum particles also catalyzed aerobic oxidation of various alcohols including nonactivated aliphatic and alicyclic alcohols, which is one of the most fundamental and important yet immature processes in organic chemistry, in water under an atmospheric pressure of oxygen gas to form aldehydes, ketones, and carboxylic acids to meet green chemical requirements. Viologen polymer-supported nanopalladium catalyst realized alpha-alkylation of ketones with primary alcohols as the alkylating agents. (C) 2009 The Japan Chemical Journal Forum and Wiley Periodicals, Inc. Chem Rec 9: 51-65; 2009: Published online in Wiley InterScience (www.interscience.wiley. com) DOI 10.1002/tcr.20165