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Assessment of the Reusability of Pd Complexes Supported on Fluorous Silica Gel as Catalysts for Suzuki Couplings
Author(s) -
Tzschucke Carl Christoph,
Andrushko Vasyl,
Bannwarth Willi
Publication year - 2005
Publication title -
european journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 1434-193X
DOI - 10.1002/ejoc.200500281
Subject(s) - reusability , chemistry , catalysis , silica gel , solvent , adsorption , reuse , dimethoxyethane , organic chemistry , nuclear chemistry , polymer chemistry , waste management , software , electrode , computer science , engineering , electrolyte , programming language
Abstract A thorough investigation of different perfluoro‐tagged Pd complexes supported on fluorous silica gel (FSG) as catalysts for Suzuki reactions is presented. The rates of reaction upon recycling of the supported complexes were measured in order to determine the reusability of the catalysts. Perfluoro‐tagged and untagged complexes adsorbed on FSG and unmodified silica gel were also compared. While with dimethoxyethane (DME) as a solvent the catalytic activity decreased upon reuse, significant activity was retained with recycled catalysts for reactions in water. With catalyst loadings of 0.001 mol‐%, TONs as high as 526000 were obtained. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)