Suzuki–Miyaura and Hiyama coupling catalyzed by PEPPSI-type complexes with non-bulky NHC ligand

• DOI: 10.1016/j.molcata.2016.03.022
• Publication Date: 2016-03-17T07:43:00Z
• Authors: Marta Osińska; Andrzej Gniewek; Anna M. Trzeciak
• Keywords: 01 natural sciences; 0104 chemical sciences

Abstract Palladium PEPPSI-type complexes with small NHC ligand were applied as catalyst precursors in cross-coupling reactions forming a wide range of non-symmetric biaryls with high yields. The recycling of the in situ formed palladium composite was successfully performed in 10 subsequent runs. Mechanistic studies confirmed a labile character of the N-ligands coordinated to palladium by ligand exchange monitored using 1H NMR. The formation of Pd(0) NPs during the catalytic process was evidenced by TEM.