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Synfacts 2006(4): 0408-0408
DOI: 10.1055/s-2006-932088
DOI: 10.1055/s-2006-932088
Polymer-Supported Synthesis
© Georg Thieme Verlag Stuttgart · New York
Polymer-Supported Triphenylarsines as Ligands and a Catalyst
H. S. He, C. Zhang, C. K.-W. Ng, P. H. Toy*
The University of Hong Kong, P. R. of China
Further Information
Publication History
Publication Date:
24 March 2006 (online)
Significance
Non-cross-linked polystyrene-supported triphenylarsine 1 and JandaJel-supported triphenylarsine 2 were prepared and used as ligands in the palladium-catalyzed homocoupling reaction of aryl halides and as a catalyst in olefin epoxiadation reaction. The homocoupling reaction of aryl bromides and iodides proceeded in the presence of Pd(OAc)2 and the polymer-supported triphenylarsines 1 and 2 to give the biaryls in 21-92% and 11-95% yields (eq. 1). The epoxidation of olefins with hydrogen peroxide took place in the presence of the polymer-supported triphenylarsine 2 to give the corresponding epoxides in 28-85% yields (eq. 2).