Premium
Palladium(II)‐ N ‐heterocyclic carbene complexes: synthesis, characterization and catalytic application
Author(s) -
Çekirdek Suzan,
Yaşar Sedat,
Özdemir İsmail
Publication year - 2014
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.3143
Subject(s) - chemistry , carbene , palladium , benzimidazole , aryl , catalysis , suzuki reaction , steric effects , coupling reaction , dimethylformamide , transition metal , combinatorial chemistry , medicinal chemistry , organic chemistry , polymer chemistry , alkyl , solvent
N ‐Heterocyclic carbenes (NHCs) are of great importance and are powerful ligands for transition metals. A new series of sterically hindered benzimidazole‐based NHC ligands (LHX) ( 2a , 2b , 2c , 2d , 2e , 2f ), silver–NHC complexes ( 3a , 3b , 3c , 3d , 3e , 3f ) and palladium–NHC complexes ( 4a , 4b , 4c , 4d , 4e , 4f ) have been synthesized and characterized using appropriate spectroscopic techniques. Studies have focused on the development of a more efficient catalytic system for the Suzuki coupling reaction of aryl chlorides. Catalytic performance of Pd–NHC complexes and in situ prepared Pd(OAc) 2 /LHX catalysts has been investigated for the Suzuki cross‐coupling reaction under mild reaction conditions in aqueous N , N ‐dimethylformamide (DMF). These complexes smoothly catalyzed the Suzuki–Miyaura reactions of electron‐rich and electron‐poor aryl chlorides. Copyright © 2014 John Wiley & Sons, Ltd.