SYNTHESES OF TRIAZOLOQUINOXALINES

摘要

This review summarizes the synthetic procedures for the production of various types of triazoloquinoxaline derivatives. Synthesis of triazolo[1,5-a]-, triazolo[4,3-a]-, triazolo[4,5-g]- and bis-triazoloquinoxalines are given. The main synthetic methods involve diazotization of 2-nitroanilines, then reaction with acid chloride derivatives followed by reduction of nitro groups and ring closure; ring closure of N-(2-alkynyl)-2-azido-anilines; reaction of 2,3-dichloroquinoxalines with acid hydrazides, or hydrazine hydrates and carbonyl compounds and reaction of 1,2-diaminobenzenes with hydrazonoyl halides. Triazoloquinoxalines are important intermediates for the design of novel biologically active molecules.