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.
The rhodium-catalyzed intramolecular direct arylation of imidazole and benzimidazole derivatives via double C–H bond activation is described. This approach provides new access to a wide range of imidazo and benzimidazo[2,1-a]isoquinoline derivatives in moderate to high yields. This reaction provides an alternative method to the known Pd-catalyzed intramolecular oxidative cross-coupling reactions.
铑催化的分子内芳基直接芳基化 咪唑和苯并咪唑衍生物通过双CH键活化。该方法以中等至高收率提供了广泛的咪唑和苯并咪唑并[2,1- a ]异喹啉衍生物的新途径。该反应为已知的Pd催化的分子内氧化交叉偶联反应提供了替代方法。
One-Pot Synthesis of Imidazolyl Isoquinolines under a Palladium-Catalyzed C–H Activation/Annulation (CHAA) Reaction
作者:Jianhui Huang、Ranran Zhu、Yuntao Wang、Jialin Liu、Qing Wang
DOI:10.1055/s-0036-1588101
日期:——
A microwave-assisted Pd-catalyzed one-pot C–H activation/annulation (CHAA) protocol has been developed for the synthesis of imidazo[2,1-a]isoquinolines and benzo[4,5]imidazo[2,1-a]isoquinolines. Further N-alkylation for the preparation of a series of the corresponding isoquinolium salts has also been demonstrated. The fluorescent properties of these isoquinolines have been studied.