Synthesis 2007(11): 1635-1642  
DOI: 10.1055/s-2007-966065
PAPER
© Georg Thieme Verlag Stuttgart · New York

Highly Efficient, Recyclable Palladium Catalyst Immobilized on Organic-Inorganic­ Hybrid Material: Application in the Heck Reaction

Hongji Lia, Lei Wang*a,b, Pinhua Lia
a Department of Chemistry, Huaibei Coal Teachers College, Huaibei, Anhui 235000, P. R. of China
Fax: +86(561)3090518; e-Mail: leiwang@hbcnc.edu.cn;
b State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. of China
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Publikationsverlauf

Received 21 February 2007
Publikationsdatum:
11. Mai 2007 (online)

Abstract

Palladium immobilized on organic-inorganic (silica gel) hybrid materials behaves as a very efficient heterogeneous catalyst in Heck reactions. Iodoarenes, bromoarenes, as well as activated chloroarenes react smoothly with olefins to afford the corresponding cross-coupling products in good to excellent yields under phosphine- and amine-free reaction conditions in the presence of palladium immobilized on 3-[(2-aminoethyl)amino]propyl-functionalized silica gel (Silica-AAPTS-Pd) or palladium immobilized on 3-aminopropyl-functionalized silica gel (Silica-APTS-Pd) as catalyst. The silica-supported palladium catalyst could be recovered and recycled by simple filtration of the reaction solution, and used for more than ten consecutive trials without significant loss of catalytic activity.