Palladium Complexes with Tetrahydropyrimidin-2-ylidene Ligands: Catalytic Activity for the Direct Arylation of Furan, Thiophene, and Thiazole Derivatives
Makaleler > Tam Makale · 2015
Yazarlar: Emine Özge Karaca, Nevin Gürbüz, İsmail Özdemir, Henri Doucet, Onur Şahin, Orhan Büyükgüngör, Bekir Çetinkaya
Organometallics, Uluslararası, 2015, cilt 34, ss 2487-2493
DOI: 10.1021/om501201r
Özet
The synthesis and characterization of novel 1,3-benzyl-3,4,5,6-tetrahydropyrimidin-2-ylidene-based N-heterocyclic carbene palladium(II) complexes ( 1a – d ) were described. The crystal structure of trans- dichlorobis[1,3-bis(4-methylbenzyl)-3,4,5,6-tetrahydropyrimidin-2-ylidene]palladium(II) was presented. Pd(II) complexes 1a – d were tested as catalysts in the direct C5 or C2 arylation of furans, thiophenes, and thiazoles, with various aryl bromides at 150 °C for 1 h. These complexes exhibited moderate to high catalytic activities under the given conditions.