A simple one-pot synthesis of quinoline-4-carboxylic acid derivatives by Pfitzinger reaction of isatin with ketones in water
作者:Qinghua Lv、Lizhen Fang、Pengfei Wang、Chenjuan Lu、Fulin Yan
DOI:10.1007/s00706-012-0822-5
日期:2013.3
AbstractAn improved Pfitzinger condensation reaction performed under acidic conditions is established. It provides a simple and efficient synthetic method for some useful quinoline-4-carboxylic acid derivatives using isatins and ketones that cannot be obtained easily under ordinary conditions. The generality of this methodology and the catalysts used for this protocol are explored in this paper. Structures
Synthesis and biological evaluation of new quinoline‐4‐carboxylic acid‐chalcone hybrids as dihydroorotate dehydrogenase inhibitors
作者:Milena M. Petrović、Cornelia Roschger、Kevin Lang、Andreas Zierer、Milan Mladenović、Snežana Trifunović、Boris Mandić、Milan D. Joksović
DOI:10.1002/ardp.202200374
日期:2023.2
Fourteen novel quinoline-4-carboxylic acid-chalcone hybrids were obtained via Claisen–Schmidt condensation and evaluated as potential human dihydroorotate dehydrogenase (hDHODH) inhibitors. The ketone precursor 2 was synthesized by the Pfitzinger reaction and used for further derivatization at position 3 of the quinoline ring for the first time. Six compounds showed better hDHODH inhibitory activity
We report herein an improved Pfitzinger reaction for the synthesis of highly functionalized quinaldines from 1,3-dicarbonyl compounds, isatins and alcohols mediated by TMSCl. This synthesis involves cyclization and esterification in one-step cascade process for the formation of a carboxylate (CO2R) at the 4-position of quinaldine ring. Moreover, this procedure shows highly efficient, good functional
The condensation of isatin with enolisable acyclic and alicylcic 1:3-diketones has been investigated and the structures of the acylated cinchoninic acids obtained have been determined. The condensation of acetonylacetone with potassium isatate is also described. Condensation of isatin with 1:3-cyclohexadiones in neutral or acid media has been shown to give products different from those in alkaline