Palladium phosphine complex catalysts immobilized on silica via a tripodal linker unit for the Suzuki-Miyaura coupling reactions of aryl chlorides

Silica-immobilized palladium phosphine complex catalysts bearing a tripodal linker unit were tested for their ability to facilitate the Suzuki-Miyaura coupling reactions of aryl chlorides. The catalyst containing the tripodal linker with a trimethylsilyl capping group on the residual surface silanol groups displayed better catalytic activities and lower palladium and phosphorus leaching levels than the catalysts bearing a conventional trialkoxy-type linker. (C) 2014 Elsevier B.V. All rights reserved.