A Cu(OAc)2-mediated intramolecular aromatic C–H amination proceeds with the aid of a picolinamide-type bidentate coordination group to deliver the corresponding indolines in good yields. The reaction occurs smoothly even under noble-metal-free conditions, and in some cases the use of an MnO2 terminal oxidant renders the process catalytic in Cu. The mild oxidation aptitude of Cu(OAc)2 and/or MnO2 accommodates
Decarboxylative acylation of indolines with α-keto acids under palladium catalysis: a facile strategy for the synthesis of 7-substituted indoles
作者:Minyoung Kim、Neeraj Kumar Mishra、Jihye Park、Sangil Han、Youngmi Shin、Satyasheel Sharma、Youngil Lee、Eui-Kyung Lee、Jong Hwan Kwak、In Su Kim
DOI:10.1039/c4cc06929c
日期:——
Palladium-catalyzed decarboxylative acylation of highly substituted indolines with alpha-keto acids via C-H bond activation is described. This protocol provides efficient access to C7-carbonylated indoles known to have diverse biological profiles.
Direct C3-Selective Arylation of N-Unsubstituted Indoles with Aryl Chlorides, Triflates, and Nonaflates Using a Palladium–Dihydroxyterphenylphosphine Catalyst
successfully applied to the direct C3-arylation of N-unsubstituted indoles with arylchlorides, triflates, and nonaflates. This catalyst showed C3-selectivity, whereas catalysts with other structurally related ligands exhibited N1-selectivity. Complex formation between the lithium salts of the ligand and the indole is assumed to accelerate the arylation at the C3 position. Reactions using 3-alkylindoles afforded
A simple method for the direct arylation of indoles
作者:Kyle Eastman、Phil S. Baran
DOI:10.1016/j.tet.2008.09.028
日期:2009.4
The scope and limitations are described for a powerful new method to access indoles bearing a quaternary center at C-3 using easily accessible bisaryl λ3-iodanes and a cheap organic base.
作者:Kevin G. Liu、Jennifer R. Lo、Albert J. Robichaud
DOI:10.1016/j.tet.2009.11.080
日期:2010.1
A general and convenient one-pot synthesis of highly substituted indolines from arylhydrazines and aldehydes is reported. This synthesis allows introduction of substitution at essentially all positions of the indoline nucleus to achieve significant diversity in this biologically important template. (C) 2009 Elsevier Ltd. All rights reserved.