A suitable approach to the synthesis of 3,7-disubstituted [1,2,4]triazolo[4,3-a]pyrazin-8(7H)-ones starting from esters of oxalic acid monoamides via cyclization of intermediate 3-hydrazinopyrazin-2-ones has been suggested.
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Published in Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1243-1249, August, 2014.
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Kovalenko, S.S., Kulikovska, K.Y., Drushlyak, O.G. et al. A Suitable Synthesis of [1,2,4]triazolo-[4,3-a]pyrazin-8(7H)-one Derivatives. Chem Heterocycl Comp 50, 1147–1153 (2014). https://doi.org/10.1007/s10593-014-1575-3
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DOI: https://doi.org/10.1007/s10593-014-1575-3