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1 Polish Journal of Chemistry

1 2008

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Palladium Complexes with Aminophosphine and Aminophosphite Based PNP and PCP Pincer-type Ligands as Catalysts of Heck Reaction

Benito-Garagorri D., Kirchner K., Trzeciak A. M., Mieczyńska E., Ziółkowski J. J.

Polish Journal of Chemistry

2008

Vol. 82, nr 9

1687-1687

Pd(II) complexes with aminophosphine-based PNP and PCP pincer type ligands were used as catalysts of Heck coupling of bromobenzenes and styrene at 110 graduate C. The best results were obtained with catalyst I, [Pd(PNP-Ph)Cl]Cl, where PNP = N,N'-bis(diphenyl - phosphino)-2,6-diaminopyridine. Heck reaction performed in the presence of I and [Bu4N]Br as co-catalyst produced in 5 h up to 100% of coupling products with E/Z ratio equal from 8.6 to 33.5. Palladium catalyst I was recycled and used at least 3 times with out remark able decrease of catalytic activity.