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The results of pioneering research on the alkylation of fused [1,2,4]triazolo[1,5-a][1,3,5]triazine system are presented, including computational studies of the reaction between 5-dimethylamino[1,2,4]triazolo[1,5-a][1,3,5]triazin-7(3H)-one and bromoethane. The reaction of 5-amino-substituted [1,2,4]triazolo[1,5-a][1,3,5]triazin-7(3H)-ones with allyl bromide, bromoethane, or (2-acetoxyethoxy)methyl bromide occurred selectively with the formation of products due to alkylation at the N-3 nitrogen atom of the heterocyclic system. The removal of acetyl protecting group from 5-amino-substituted {2-[(7-oxo[1,2,4]triazolo[1,5-a][1,3,5]triazin-3(7H)-yl)methoxy]ethyl}acetates gave 5-aza analogs of acyclovir, containing a substituted amino group at position 5 of the heterocyclic 3-[(2-hydroxyethoxy)methyl][1,2,4]-triazolo[1,5-a][1,3,5]triazin-7(3H)-one system.
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The work was performed with financial support from the Ministry of Education and Science of the Russian Federation within the framework of the Project part of State Assignment to the Samara State Technical University (project No. 4.813.2014/K).
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, 2016, 52(12), 1054–1060
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Ul′yankina, I.V., Zavodskaya, A.V., Parfenov, V.E. et al. Alkylation of [1,2,4]triazolo[1,5-a][1,3,5]triazin-7(3H)-ones. Chem Heterocycl Comp 52, 1054–1060 (2016). https://doi.org/10.1007/s10593-017-2006-z
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DOI: https://doi.org/10.1007/s10593-017-2006-z