4-hydroxy-2- quinolones 199*. use of N,N'-dicyclohexylcarbodiimide in the synthesis of ethyl 4-hydroxy-2-oxo-1,2-dihydroquinoline-3-carboxylates
作者:I. V. Ukrainets、N. Yu. Golik、O. V. Bevz、O. V. Gorokhova
DOI:10.1007/s10593-011-0843-8
日期:2011.10
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.