Hofmann degradation of 4-amino-8-methylcinnoline-3-carboxamide (1) gave 3,4-diaminocinnoline 2 which was employed to prepare imidazo and 2-substitutedimidazo[4,5-c]cinnolines 3. On the other hand, reaction of 4-aminocinnoline-3-carboxylic acid hydrazides 4 with ethyl chloroformate or potassium O-ethyl dithiocarbonate afforded 2,3,4,5-tetrahydro-1H-1,2,4- triazepino[6,5-c]cinnoline-2,5-diones 6 and the corresponding 2-thiones 7, respectively. Furthermore, reacting 4 with excess orthoesters gave mixtures of 4,5-dihydro-1H-1,2,4-triazepino[6,5-c]cinnolin-5-ones 9 and 3-(ethoxyalkylidenamino) pyrimi-do[5,4-c] cinnoline-4-ones 10 which were separated and characterized.
Ghoneim, K., Essawi, M., El-Meligie, S., & Kamal, A. (2000). SYNTHESIS OF IMIDAZO[4,5-C] AND TRIAZEPINO|6,5-C]CINNOLINES. Zagazig Journal of Pharmaceutical Sciences, 9(2), 1-6. doi: 10.21608/zjps.2000.169703
MLA
Khadiga Ghoneim; Mohamed Essawi; Salwa El-Meligie; Aliaa Kamal. "SYNTHESIS OF IMIDAZO[4,5-C] AND TRIAZEPINO|6,5-C]CINNOLINES", Zagazig Journal of Pharmaceutical Sciences, 9, 2, 2000, 1-6. doi: 10.21608/zjps.2000.169703
HARVARD
Ghoneim, K., Essawi, M., El-Meligie, S., Kamal, A. (2000). 'SYNTHESIS OF IMIDAZO[4,5-C] AND TRIAZEPINO|6,5-C]CINNOLINES', Zagazig Journal of Pharmaceutical Sciences, 9(2), pp. 1-6. doi: 10.21608/zjps.2000.169703
VANCOUVER
Ghoneim, K., Essawi, M., El-Meligie, S., Kamal, A. SYNTHESIS OF IMIDAZO[4,5-C] AND TRIAZEPINO|6,5-C]CINNOLINES. Zagazig Journal of Pharmaceutical Sciences, 2000; 9(2): 1-6. doi: 10.21608/zjps.2000.169703
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