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
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