Synthesis 2003(18): 2894-2897  
DOI: 10.1055/s-2003-44352
SPECIALTOPIC
© Georg Thieme Verlag Stuttgart · New York

A Superior Non-Symmetrical NCP Pincer Type Palladacycle Catalyst Precursor for the Coupling of Aryl Boronic Acids with Aryl Chlorides

Gilber R. Rosa, Gunter Ebeling, Jairton Dupont*, Adriano L. Monteiro*
Laboratory of Molecular Catalysis, Institute of Chemistry, UFRGS, Av. Bento Gonçalves, 9500 Porto Alegre, RS Brazil
Fax: +55(51)33167304; e-Mail: almonte@iq.ufrgs.br;
Further Information

Publication History

Received 28 October 2003
Publication Date:
25 November 2003 (online)

Abstract

The air and water stable non-symmetrical pincer palladacycle [Me2NCH2(Cl)C=C(CH2)2OP(i-Pr)2-kNkCkP]PdCl 5, easily prepared from the chloropalladation of the hetero-substituted alkyne Me2NCH2C≡C(CH2)2OP(i-Pr)2, is a highly efficient catalyst precursor for the coupling of aryl boronic acids and aryl chlorides. Both electron-rich and electron-poor aryl chlorides are efficiently coupled in the presence of 5 to furnish the corresponding cross-coupled products in excellent yields, and a wide variety of functional groups are tolerated in both aryl chloride and aryl boronic acid.