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1,2,3-Triazolo(1,5)Azines et Autres Hétérocycles Azotés Dérivés D'Azine-carboxaldéhydes

✍ Scribed by Georges Maury; Driss Meziane; Driss Sraïri; Jean-Paul Paugan; Renée Paugam


Publisher
Wiley (John Wiley & Sons)
Year
2010
Weight
389 KB
Volume
91
Category
Article
ISSN
0037-9646

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✦ Synopsis


Abstract

α‐(N)‐azine‐carboxaldehydes are convenient precursors of 1,2,3‐triazolo (1,5) azines. Through oxidative cyclization of the corresponding hydrazones we have prepared the new 1,2,3‐triazolo (1,5‐b)pyridazine and 1,2,3‐triazolo (1,5‐a)pyrazine. Unlike the other azaindolizines these compounds are degraded by electrophiles. Attempts to prepare imidazo(1,5‐c) pyrimidine or derivatives have been carried out either from 4‐aminomethylpyrimidine or from ethyl 2‐(4‐pyrimidinyl)propionate.


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