在此,从容易获得的邻甲酰基(或邻酰基)肉桂酸酯和吲哚描述了一种直接的布朗斯台德酸促进的多米诺骨牌途径来构建取代的苯并[ b ]咔唑。值得注意的是,该方案适合保护无基团的吲哚。值得注意的是,该方法基于在温和且无金属的反应条件下单锅区域选择性构建两个新的 C-C 键和芳构化序列。机理研究表明,通过在邻甲酰基(或邻酰基)肉桂酸酯的羰基碳上用两个吲哚分子进行双重芳族取代,最初形成双吲哚取代中间体,然后进行分子内环化和芳构化,排除第二个吲哚分子。此外,还通过放大和衍生反应(包括光物理性质研究)说明了该方法的有效性。
在此,从容易获得的邻甲酰基(或邻酰基)肉桂酸酯和吲哚描述了一种直接的布朗斯台德酸促进的多米诺骨牌途径来构建取代的苯并[ b ]咔唑。值得注意的是,该方案适合保护无基团的吲哚。值得注意的是,该方法基于在温和且无金属的反应条件下单锅区域选择性构建两个新的 C-C 键和芳构化序列。机理研究表明,通过在邻甲酰基(或邻酰基)肉桂酸酯的羰基碳上用两个吲哚分子进行双重芳族取代,最初形成双吲哚取代中间体,然后进行分子内环化和芳构化,排除第二个吲哚分子。此外,还通过放大和衍生反应(包括光物理性质研究)说明了该方法的有效性。
The microwave-assisted and continuous-flow Mizoroki–Heck reaction using a heterogeneous palladiumcatalyst supported on the anion-exchange resin DIAION WA30 (7% Pd/WA30) is described. The microwave resonance is finely adjusted to 2.4 GHz according to the electric permittivity of the reaction medium for efficient heating. Organic solvents, such as acetonitrile, N,N-dimethylacetamide, and toluene, can
Ruthenium-Catalyzed <i>Ortho</i>-Alkenylation of Aromatic Ketones with Alkenes by C–H Bond Activation
作者:Kishor Padala、Masilamani Jeganmohan
DOI:10.1021/ol202580e
日期:2011.12.2
A ruthenium-catalyzed chelation-assisted C–Hbond activation of aromatic ketones and the reaction with olefins to provide Heck-type products in good to excellent yields with a high regio- and stereoselective manner is described.
Cp*Co(III)‐Catalyzed C−H Alkenylation of Aromatic Ketones with Alkenes
作者:Md Raja Sk、Sourav Sekhar Bera、Modhu Sudan Maji
DOI:10.1002/adsc.201801385
日期:2019.2
Cost‐effective and air‐stable high‐valent cobalt(III)‐catalyzed weakly coordinating, ketone‐directed regioselective mono‐alkenylation of arenes and heteroarenes with alkenes is demonstrated. Various electron‐rich and electron‐deficient arenes are tolerated under the reaction conditions, providing E‐alkenylated products exclusively. The tert‐butyl‐acrylates serve as an acrylic acid surrogate to provide
Rhodium-Catalyzed Oxidative Olefination of CH Bonds in Acetophenones and Benzamides
作者:Frederic W. Patureau、Tatiana Besset、Frank Glorius
DOI:10.1002/anie.201006222
日期:2011.2.1
A good neighborhood! The metal‐catalyzed oxidativeCH functionalization of electron‐rich arenes is well‐established, but analogous reactions of electron‐poor substrates are rare. A new application makes use of common electron‐withdrawing functional groups (COMe, CONH2, CONEt2) in the rhodium‐catalyzed oxidative Heck reaction to generate complex organic molecules. Cp*= η5‐C5Me5.
2-Hydroxy-1,10-phenanthroline vs 1,10-Phenanthroline: Significant Ligand Acceleration Effects in the Palladium-Catalyzed Oxidative Heck Reaction of Arenes
作者:Cheng-Hao Ying、Shao-Bai Yan、Wei-Liang Duan
DOI:10.1021/ol4033804
日期:2014.1.17
A series of bidentate monoanionic nitrogen ligands were designed and applied in the Pd-catalyzed oxidative Heck reaction of arenes with alkenes. Significant ligand-accelerated effects were observed, and direct C-H functionalized products were formed in high yields with meta-selectivity.