Synthesis of some isomeric quinoxaline derivatives with 6-azauracil cycle
作者:Iveta Wiedermannová、Jan Slouka
DOI:10.1002/jhet.5570380633
日期:2001.11
By diazotization of 3-(2-aminophenyl)-1,2-dihydroquinoxaline 1c, its 3-(4-aminophenyl)-isomer2c, 3-(2-aminobenzyl)-1,2-dihydroquinoxaline-2-one 3c and its 3-(4-aminobenzyl)-isomer 4c and by azo coupling of formed diazonium salts with ethyl cyanoacetylcarbamate, corresponding hydrazones ld-4d were prepared. Cyclization of these compounds afforded compounds containing two heterocyclic rings with acidic