Double Carbonylation Using Glyoxal (HCOCOH): A Practical Copper-Promoted Synthesis of Isatins from Primary and Secondary Anilines
作者:Suzie Hui Chin Kuan、Wei Sun、Lu Wang、Chungu Xia、Meng Guan Tay、Chao Liu
DOI:10.1002/adsc.201700583
日期:2017.10.25
(glyoxal) as the double carbonylation reagent. Simple CuCl2⋅2H2O (copper(II) chloride dihydrate) was used as the oxidant for this transformation. Under optimized reaction conditions, various primary and secondary anilines were double-carbonylated to afford their corresponding isatins (26 examples, up to 80% yields).
A novel, efficient and environmental method for the conversion of 2-oxoaldehydes into cyanoformamides with iodosobenzene diacetate as oxidant has been developed.
A facile strategy for the synthesis of isatins in high yield from N-alkyl-2-oxo-acetanilides has been developed via Friedel Crafts alkylation using FeCl3 as catalyst under air. This reaction proceeds through direct intramolecular addition and oxidation in one pot. Also this methodology is operationally simple, atom economical, and environment friendly. (C) 2015 Elsevier Ltd. All rights reserved.
Copper-Catalyzed Intramolecular C−H Oxidation/Acylation of Formyl-<i>N</i>-arylformamides Leading to Indoline-2,3-diones
作者:Bo-Xiao Tang、Ren-Jie Song、Cui-Yan Wu、Yu Liu、Ming-Bo Zhou、Wen-Ting Wei、Guo-Bo Deng、Du-Lin Yin、Jin-Heng Li
DOI:10.1021/ja103426d
日期:2010.7.7
A new, efficient Cu-catalyzed intramolecular C-H oxidation/acylation method has been developed for the synthesis of substituted indoline-2,3-diones (isatins). In the presence of CuCl, and O-2, a variety of formyl-N-arylformamides underwent the tandem reaction to afford the corresponding indoline-2,3-diones in moderate to good yields. It is noteworthy that the reaction serves as the first example of transition-metal-catalyzed transformation for the preparation of indoline-2,3-diones.