Palladium-Catalyzed Amidation of Unactivated C(sp<sup>3</sup>)H Bonds: from Anilines to Indolines
作者:Julia J. Neumann、Souvik Rakshit、Thomas Dröge、Frank Glorius
DOI:10.1002/anie.200903035
日期:2009.9.1
Unreactive CH to attractive CN: A palladium‐catalyzed intramolecular direct amidation of unactivated C(sp3)Hbonds combines CH activation and CN bond formation into one efficient process. Under the optimized conditions, an extraordinary tolerance of functional groups was observed, and numerous indoline derivatives were formed (see scheme).
Cu-Catalyzed Intramolecular Amidation of Unactivated C(sp<sup>3</sup>
)−H Bonds To Synthesize N-Substituted Indolines
作者:Fei Pan、Bin Wu、Zhang-Jie Shi
DOI:10.1002/chem.201600680
日期:2016.5.4
A copper‐catalyzed intramolecularamidation of unactivated C(sp3)−H bonds to construct indoline derivatives has been developed. Such an amidation proceeded well at primary C−H bonds preferred to secondary C−H bonds. The transformation owned a broad substrate scope. The corresponding indolines were obtained in good to excellent yields. N‐Formal and other carbonyl groups were suitable and were easily
Rotational features of carbon-nitrogen bonds in axially chiral o-tert-butyl anilides and related molecules. Potential substrates for the ‘prochiral auxiliary’ approach to asymmetric synthesis
作者:Dennis P. Curran、Gregory R. Hale、Steven J. Geib、Aaron Balog、Quezia B. Cass、Ana Luiza G. Degani、Marcelo Z. Hernandes、Luiz Carlos G. Freitas
DOI:10.1016/s0957-4166(97)00599-5
日期:1997.12
A new strategy for asymmetric induction termed the 'prochiral auxiliary' approach is introduced. Reactions of acylating agents with prochiral N-methyl-o-tert-butyl aniline provide anilides that are axially chiral by virtue of restricted rotation about the N-Ar bond, Rotamer populations about the amide bond (E/Z) were studied by H-1 NMR. Several pairs of enantiomeric o-tert-butyl anilides were separated by chiral chromatography and barriers about the N-Ar bond were measured by thermal racemization. Related o-(1-(trialkylsilyloxy)-1-methylethyl) anilides were also studied. (C) 1997 Published by Elsevier Science Ltd. All rights reserved.