Synthesis of 2-R-3-Hydroxy[1,2,4]triazino[6,1-b]-quinazoline-4,10-diones
摘要:
A preparation method was developed for [1,2,4]triazino[6,1-b]quinazoline-4,10-diones using isatoic anhydride, carboxylic acids hydrazides, ethyl oxalyl chloride, and hydroxylamine.
Reactions of ethyl oxamate and dialkyl oxalates with anthranilic acid derivatives
作者:L. A. Shemchuk、V. P. Chernykh、P. S. Arzumanov、O. S. Krys’kiv
DOI:10.1134/s1070428007050120
日期:2007.5
Ethyl oxamate reacted with anthranilic acid derivatives at the amide or the ester group leading to the formation of respective esters or amides. A simple method was developed for preparation of alkyl 3-amino-4-oxo-3,4-dihydroquinazoline-2-carboxylates.