A One-Pot Rearrangement of 2-(N-Alkyl-N-aryl)aminochromone-3-carbaldehyde to N-Alkyl-3-salicyloyl-2-quinolone - An Antileishmanial Agent
作者:Chandrakanta Bandyopadhyay、Sourav Maiti、Suvadip Mallick、Suman Panja、Chiranjib Pal
DOI:10.1055/s-0030-1260977
日期:2011.9
2-(N-Aryl)aminochromone-3-carbaldehyde does not show any change on heating in acetic acid, but under the same reaction conditions 2-(N-alkyl-N-aryl)aminochromone-3-carbaldehyde rearranges to 3-salicyloyl-2-quinolones, which exhibits antileishmanial activity.
Rearrangements of N-alkyl-/aryl-nitrones derived from 4-oxo-4H-1-benzopyran-3-carboxaldehyde––a solvent-dependent process
作者:Tarun Ghosh、Chandrakanta Bandyopadhyay
DOI:10.1016/j.tetlet.2004.06.033
日期:2004.8
C-(4-Oxo-4H-1-benzopyran-3-yl)-N-alkyl-/aryl-nitrones derived from 4-oxo-4H-1-benzopyran-3-carboxaldehyde, rearrange to 2-alkyl-/aryl-amino-3-formylchromone and/or 3-(alkyl-/aryl-aminomethylene)chroman-2,4-dione depending upon the reaction medium. 3-(Alkylaminomethylene)chroman-2,4-dione has been utilized in the synthesis of 1-benzopyrano[3,4-d]isoxazole-4-one. (C) 2004 Elsevier Ltd. All rights reserved.
Maiti, Sourav; Panja, Suman Kalyan; Bandyopadhyay, Chandrakanta, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2009, vol. 48, # 10, p. 1447 - 1452
Regio- and stereoselective synthesis of 1-benzopyrano[2,3-b]pyrrolo[2,3-d]pyridines: A microwave-accelerated intramolecular [3+2] cycloaddition reaction of azomethine ylide
作者:Sourav Maiti、T. M. Lakshmykanth、Suman Kalyan Panja、Ranjan Mukhopadhyay、Ayan Datta、Chandrakanta Bandyopadhyay
DOI:10.1002/jhet.567
日期:2011.7
Regio‐ and stereoselective syntheses of tetracyclic compounds having chromone, pyrrolidine, and piperidine rings have been accomplished by an intramolecular [3+2] cycloadditionreaction involving azomethineylide. The reactions were carried out thermally as well as by irradiation with microwave. The latter process accelerates the reaction. The selectivities were investigated by density functional theory