Synthesis of 6-Nitroderivatives of Oxazolo[3,2-a]-pyridines and Their Reactions with Nucleophiles

Autor: Eugene V. Babaev, Alexander A. Bush
Jazyk: angličtina
Rok vydání: 2003
Předmět:
Zdroj: Molecules, Vol 8, Iss 6, Pp 460-466 (2003)
Druh dokumentu: article
ISSN: 1420-3049
DOI: 10.3390/80600460
Popis: 5-Nitro-2-pyridone can be selectively N-phenacylated, and the resulting phenacylpyridones I undergo cyclization to 6-nitrooxazolo[3,2-a]pyridinium salts II. These salts II readily react with ammonia and aliphatic amines leading to the products of pyridine ring opening - previously unknown 1-amino-2-nitro-4-(oxazole-2-yl)butadienes-1,3. Reaction of salts II with water lead to hydrolytic cleavage of the oxazole fragment.
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