Ruthenium-Catalyzed Heteroatom-Directed Regioselective C–H Arylation of Indoles Using a Removable Tether
摘要:
A new approach to C-2 arylated indoles has been developed by utilizing a ruthenium-catalyzed, heteroatom-directed regioselective C-H arylation. The reaction is highly site-selective and results in very good yields. The highlight of the work is the use of a removable directing group and compatibility of the catalytic system with halogen functional groups in the substrates.
Cobalt(II)-Catalyzed Oxidative C–H Arylation of Indoles and Boronic Acids
作者:Xinju Zhu、Jian-Hang Su、Cong Du、Zheng-Long Wang、Chang-Jiu Ren、Jun-Long Niu、Mao-Ping Song
DOI:10.1021/acs.orglett.6b03746
日期:2017.2.3
Co(II)-catalyzed C–H C2 selective arylation of indoles with boronic acids through monodentate chelation assistance has been achieved for the first time. The unique features of this methodology include mild reaction conditions, highly C2 regioselectivity, and employment of a Grignard reagent-free catalytic system. A wide range of substrates, including unreactive arenes, are well tolerated, which enables
Synthesis of<i>N</i>-(2-Pyridyl)indoles via Pd(II)-Catalyzed Oxidative Coupling
作者:Jinlei Chen、Qingyu Pang、Yanbo Sun、Xingwei Li
DOI:10.1021/jo1025546
日期:2011.5.6
Readily available Pd(II) chloride catalysts can catalyze selective and efficientoxidativecoupling between N-aryl-2-aminopyridines and internal alkynes to yield N-(2-pyridyl)indoles. This process involves the ortho C−H activation of N-aryl-2-aminopyridines, and CuCl2 was used as an oxidant. Compared to our previously reported Rh(III)-catalyzed synthesis of this class of product, this method is advantageous
Nanocrystalline magnesium oxide-stabilized palladium(0): an efficient and reusable catalyst for synthesis of N-(2-pyridyl)indoles
作者:Police Vishnuvardhan Reddy、Manne Annapurna、Pottabathula Srinivas、Pravin R. Likhar、Mannepalli Lakshmi Kantam
DOI:10.1039/c5nj00074b
日期:——
A selective and efficient catalytic process has been developed for the oxidative coupling between N-aryl-2-aminopyridines and alkynes using a nanocrystallinemagnesium oxide (NAP–MgO)-supported palladium nanoparticle [NAP–Mg–Pd(0)] catalyst and CuCl2 as an oxidant. The process involves the ortho C–H activation of N-aryl-2-aminopyridines to give N-pyridyl indoles in excellent yields and the true heterogeneity
Rhodium(<scp>iii</scp>)-catalyzed regioselective oxidative annulation of anilines and allylbenzenes <i>via</i> C(sp<sup>3</sup>)–H/C(sp<sup>2</sup>)–H bond cleavage
作者:Yunqi Liu、Yudong Yang、Chunxia Wang、Zhishuo Wang、Jingsong You
DOI:10.1039/c8cc09099h
日期:——
and directed C(sp2)–H activation into a single approach for discovering unprecedented chemical transformations. As a proof-of-concept, we disclose for the first time the rhodium-catalyzed regioselectiveoxidative annulation of anilines with allylbenzenes to deliver a variety of indoles. In this work, the C3 and C2 positions of the allylic segment are set to construct C–N and C–C bonds, respectively