501370-44-1Relevant articles and documents
New 1,2,3-triazolo[4,5-e]1,2,4-triazolo[4,3-c]pyrimidine derivatives II
Biagi, Giuliana,Giorgi, Irene,Livi, Oreste,Pacchini, Federica,Scartoni, Valerio
, p. 885 - 888 (2007/10/03)
The 7-chloro-3-(2-chlorobenzyl)- and 7-chloro-3-(2-fluorobenzyl)-1,2,3-triazolo[4,5-d]pyrimidines (1 and 4), by nucleophilic replacement with some hydrazides, gave the corresponding 7-hydrazidoderivatives (2a-e and 5a-e). These, by heating in Dowtherm, underwent an intramolecular cyclization to form the new tricyclic 7-substituted-3-(2-chlorobenzyl)- and 3-(2-fluorobenzyl)-1,2,3-triazolo[4,5-e]1,2,4-triazolo[4,3-c]pyrimidines (3a-d and 6a-d). The 7-hydrazino-3-(2-chlorobenzyl)- and 7-hydrazino-3-(2-fluorobenzyl)-triazolo-pyrimidines (9a and 9b) were also prepared via the corresponding mercapto (7a and 7b) and thiomethyl (8a and 8b) derivatives.