Palladium-Catalyzed Oxidative Intramolecular CC Bond Formation via Double sp2 CH Activation between the 2-Position of Imidazoles and a Benzene Ring
作者:Manman Sun、Huandong Wu、Junnan Zheng、Weiliang Bao
DOI:10.1002/adsc.201100801
日期:2012.3.16
Oxidative intramolecularCCbond formation via double sp2 CHactivation between the 2‐position of imidazoles and a benzene ring catalyzed by palladium(II) has been developed, which provides an atom‐economical, concise and efficient methodology to synthesize imidazole‐ or benzimidazole‐fused isoquinoline polyheteroaromatic compounds.
Aqueous syntheses of methylimidazo[1,2-a]pyridines without any deliberate addition of catalyst are reported. Imidazo[1,2-a]pyrazine and imidazo[2,1-a]isoquinoline were also obtained in good yields under similar conditions. With acetonitrile as solvent, Ag-catalyzed intra-molecular aminooxygenation produced imidazo[1,2-a]pyridine-3-carbaldehydes in moderate to good yields.
METALLKOMPLEXE
申请人:Merck Patent GmbH
公开号:EP2726490B1
公开(公告)日:2015-04-29
METAL COMPLEXES
申请人:Stoessel Philipp
公开号:US20110284799A1
公开(公告)日:2011-11-24
The present invention relates to metal complexes and to electronic devices, in particular organic electroluminescent devices, comprising these metal complexes.