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Synthesis of pyrido[3′,2′:4,5]thieno[2,3-e][1,2,4]triazolo[4,3-a]pyrimidin-5(4H)-one derivatives

✍ Scribed by Abolghasem Davoodnia; Mehdi Bakavoli; Sharare Mohseni; Niloofar Tavakoli-Hoseini

Publisher
Springer Vienna
Year
2008
Tongue
English
Weight
86 KB
Volume
139
Category
Article
ISSN
0026-9247

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## Abstract Some new 1,2,3‐triazolo[4,5‐__e__]‐1,2,4‐triazolo[3,4‐__c__]pyrimidmes were prepared starting from the corresponding 1,2,3‐triazolo[4,5‐__d__]pyrimidines __via__ the formation of the 1,2,4‐triazole ring. Thus suitable hydrazino derivatives 6 were condensed with triethyl orthoformate, tr