2-(1-Benzotriazolyl)pyridine: A Robust Bidentate Ligand for the Palladium-Catalyzed CC (Suzuki, Heck, Fujiwara-Moritani, Sonogashira), CN and CS Coupling Reactions
作者:Akhilesh K. Verma、Rajeev R. Jha、Ritu Chaudhary、Rakesh K. Tiwari、Abhinandan K. Danodia
DOI:10.1002/adsc.201200583
日期:2013.2.1
designed and employed for the palladium-catalyzed CC (Suzuki, Heck, Fujiwara–Moritani, and Sonogashira), CN and CS coupling reactions. The ligand was found to be inexpensive, thermally stable, easy to synthesize from easily accessible starting materials on a multigram scale, show simplicity in use, and robustness in application, making this ligand effective for different coupling reactions. Suitably, the
设计了一种新型的双齿配体1-(吡啶-2-基)-1 H-苯并[ d ] [1,2,3]三唑,并用于钯催化的CC(Suzuki,Heck,Fujiwara– Moritani和Sonogashira),CN和CS偶联反应。发现该配体便宜,热稳定,易于以几克规模由容易获得的起始原料合成,显示出使用简单性和在应用中的坚固性,从而使该配体对于不同的偶联反应有效。适当地,苯并三唑环的NN键的供体能力和吡啶环的N上的孤对电子增强了配体的二齿能力。
3-Alkyl-2-pyridyl Directing Group-Enabled C2 Selective C–H Silylation of Indoles and Pyrroles via an Iridium Catalyst
作者:Hui Sun、Yi Cheng、Houyun Teng、Xiaoqi Chen、Xiaokang Niu、Hao Yang、Yu-Ming Cui、Li-Wen Xu、Lei Yang
DOI:10.1021/acs.joc.2c01385
日期:2022.10.7
An iridium-catalyzed, directing group-enabled site selective intra- and intermolecular silylation of indoles and pyrroles with hydrosilanes has been developed under ligand-free conditions. Fine-tuning of the removable 3-alkyl-2-pyridyl directing group was found to be crucial for achieving high yields for C2-silylated indole and pyrrole products. Moreover, the scalability was demonstrated, and further
Benzotriazole: an efficient ligand for the copper-catalyzed N-arylation of indoles
作者:Akhilesh Kumar Verma、Jaspal Singh、Richard C. Larock
DOI:10.1016/j.tet.2009.07.050
日期:2009.10
A general, efficient, and inexpensive method for the N-arylation of indoles using a catalytic system derived from Cul and benzotriazole is reported. Selective mono N-arylation of indoles with ortho-di-haloarenes has also been successfully achieved in good yields using this protocol. (C) 2009 Published by Elsevier Ltd.