New catalytic systems for coupling of dihalogenopyridines and 5,5″-dibromo-2,2′:6′,2″-terpyridine with 5-bromo-2-trialkylstannylpyridines and 2-trialkylstannylthiophenes

Autor:	Michal Krompiec, Hanna Ignasiak, Stanisław Krompiec, Stefan Baj, Mieczysław Łapkowski, Damian Grabarczyk
Rok vydání:	2007
Předmět:	Ligand Process Chemistry and Technology Triphenyl phosphite chemistry.chemical_element General Chemistry Medicinal chemistry Catalysis Stille reaction chemistry.chemical_compound chemistry Pyridine Thiophene Organic chemistry Terpyridine Palladium
Zdroj:	Catalysis Communications. 8:1457-1462
ISSN:	1566-7367
DOI:	10.1016/j.catcom.2006.12.013
Popis:	Catalytic activity of a number of systems consisting of a stable palladium precursor ([Pd(acac)2], [PdCl2(1,5-COD)], …) and a ligand (phosphines, AsPh3, SbPh3, P(OPh)3, …) in Stille coupling reactions of 2,6-dihalogenopirydines with 5-bromo-2-trialkylstannylpyridines, forming 5,5″-dibromo-2,2′:6′,2″-terpyridine. A new, active, selective and convenient catalytic system for this reaction, consisting of [Pd(acac)2] and triphenyl phosphite was found. A new, four membered library of thienyl-substituted pyridine and terpyridine ligands has been synthesized at the same conditions, by coupling of 2-tributylstannyl-3,4-ethylenedioxythiophene or 5-tributylstannyl-2,2′-bithiophene with 5,5″-dibromo-2,2′:6′,2″-terpyridine or 3,5-dibromopyridine.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::27b9b88fd295fa12ced4e141a238e67b https://doi.org/10.1016/j.catcom.2006.12.013 Zobrazit plný text záznamu Full Text from ScienceDirect