I. Ukrainets, N. Y. Golik, O. Bevz
Oct 29, 2011
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Journal
Chemistry of Heterocyclic Compounds
Abstract
A novel method has been developed for the synthesis of 4-hydroxy-2-oxo-1,2-dihydroquinoline-3-carboxylic acids esters based on the use of monoethyl malonate as an acylating agent in the presence of N,N'-dicyclohexylcarbodiimide and characterized by high yields and purity for the final products. Practical recommendations are given for the removal of specific admixtures.