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Palladium complexes with aminophosphine and aminophosphite based PNP and PCP pincer-type ligands as catalysts of Heck reaction.
Autorzy
Rok wydania
2008
Czasopismo
Numer woluminu
82
Strony
1687-1694
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
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.