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Report | Regular issue | Vol 23, No. 2, 1985, pp.349-355
Published online, 1st January, 1970
DOI: 10.3987/R-1985-02-0349
Imidazolecarboxalic Acids and Their Derivatives. Synthesis of 10H-Imidazo[1,5-a]pyrido[1,2-d]pyrazin-10-one, a Novel Ring System

Elena Belgodere, Ricardo Bossio, Stefano Marcaccini, Sandro Parti, and Roberto Pepino*

*CNR, Centro di Studio Sulla Chimica e la Struttura dei Composti Eterociclici e lolo Applicazioni, c/o Dipartimento di Chimica Organica "Ugo Schiff", Università di Firenze, Via Gino Capponi 9, I-50121 Firenze, Italy


Some derivatives of 10H-imidazo[1,5-a]pyrido[1,2-d]pyrazin-10-one (XV), a novel ring system, were prepared starting from 2-mercapto-1-(2-pyridylmethyl)-1H-imidazole-5-carboxylic acid (VIa)1 and acetic or propionic anhydride. Analogously the synthesis of the unsubstituted ring was achieved starting from 1-(2-pyridylmethyl)-1H-imidazole-5-carboxylic acid (XIV).