摘要:
Reactions of 4-oxo benz[1,3-e]oxazinium perchlorates with 1-R-1-3-R-2-5-aminopyrazoles lead to the formation of derivatives of pyrazolo[3,4-d]pyrimidine and pyrazolo[1,5-a]1,3,5]triazine series, and with 3-amino-1,2,4-triazole, to [1,2,4]triazolo[1,5-a][1,3,5]triazines.