在金属三氟甲磺酸酯催化的炔烃加氢芳基化中,采用离子液体显着增强了催化活性,从而扩大了底物(芳烃和炔烃)的范围。在某些情况下,甚至在常规有机溶剂中不可能发生的反应在离子液体中也能顺利进行。而且,通过在反应后简单地倾析有机层,可以容易地回收含离子液体的催化剂,并且可以将其重新用于随后的运行中而没有任何明显的活性损失。包括反应中间体的13 C NMR分析和同位素实验在内的机理研究首次证实,这种类型的反应是通过乙烯基阳离子中间体进行的。
Catalytic oxidation/C–H functionalization of N-arylpropiolamides by means of gold carbenoids: concise route to 3-acyloxindoles
作者:Deyun Qian、Junliang Zhang
DOI:10.1039/c2cc31972a
日期:——
An efficient catalytic CâH functionalization by means of gold carbenoids for the one-step synthesis of 3-acyloxindole derivatives has been developed. The reaction proceeds efficiently with extremely good substrate scope and significant opportunities for structural diversification.
Pd‐Catalyzed Vicinal Intermolecular Annulations of Iodoarenes, Indoles, and Carbazoles with Enynes
作者:Undamatla Suri Babu、Ramesh Kotipalli、Jagadeesh Babu Nanubolu、Maddi Sridhar Reddy
DOI:10.1002/chem.202302788
日期:2024.2
A vicinal annulation of 2-iodobenzoates, indoles, and carbazoles with 1,6-enynes is described. The relay involved 7-/8-membered palladacycles, leading to multicyclic scaffolds, which were readily diversified to an array of adducts (with new functional tethers and/or three contiguous stereocenters), in which a challenging benzylic monooxygenation was showcased.
Dramatic Enhancement of Catalytic Activity in an Ionic Liquid: Highly Practical Friedel-Crafts Alkenylation of Arenes with Alkynes Catalyzed by Metal Triflates
作者:Choong Eui Song、Da-un Jung、Su Yhen Choung、Eun Joo Roh、Sang-gi Lee
DOI:10.1002/anie.200460292
日期:2004.11.19
Metal Triflate-Catalyzed Regio- and Stereoselective Friedel–Crafts Alkenylation of Arenes with Alkynes in an Ionic Liquid: Scope and Mechanism
作者:Mi Young Yoon、Jin Hong Kim、Doo Seoung Choi、Ueon Sang Shin、Jin Yong Lee、Choong Eui Song
DOI:10.1002/adsc.200700039
日期:2007.7.2
In the metaltriflate-catalyzed hydroarylation of alkynes, employing an ionicliquid dramatically enhanced the catalytic activities, resulting in broadening the scope of substrates (arenes and alkynes). In some cases, even reactions that were not possible in conventional organic solvents proceeded smoothly in ionicliquids. Moreover, the ionicliquid phase containing catalyst could be readily recovered
在金属三氟甲磺酸酯催化的炔烃加氢芳基化中,采用离子液体显着增强了催化活性,从而扩大了底物(芳烃和炔烃)的范围。在某些情况下,甚至在常规有机溶剂中不可能发生的反应在离子液体中也能顺利进行。而且,通过在反应后简单地倾析有机层,可以容易地回收含离子液体的催化剂,并且可以将其重新用于随后的运行中而没有任何明显的活性损失。包括反应中间体的13 C NMR分析和同位素实验在内的机理研究首次证实,这种类型的反应是通过乙烯基阳离子中间体进行的。
Palladium-Catalyzed Carbo-Aminative Cyclization of 1,6-Enynes: Access to Napthyridinone Derivatives
We describe herein a general approach to napthyridinones via the Pd-catalyzed annulation of 1,6-enynes with 2-iodoanilines. This protocol represents a rare carbo-aminative annulative cyclization via the 6-endo-trig mode, subduing the well-documented exo-trig/dig cyclizations. The regioselective aryl palladation of alkyne followed by Heck-type intramolecular coupling before isomerization were key in