Synthesis of 1-Amino-3-oxo-2,7-naphthyridines Smiles Rearrangement: A New Approach in the Field of Chemistry of Heterocyclic Compounds
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Chemistry
Molecular Biology
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In this paper we describe an efficient method for the synthesis of new heterocyclic systems: furo[2,3-]-2,7-naphthyridines , as well as a new method for the preparation of 1,3-diamino-2,7-naphthyridines . For the first time, a Smiles rearrangement was carried out in the 2,7-naphthyridine series, thus gaining the opportunity to synthesize 1-amino-3-oxo-2,7-naphthyridines , which are the starting compounds for obtaining furo[2,3-]-2,7-naphthyridines. The cyclization of alkoxyacetamides proceeds via two different processes: the expected formation of furo[2,3-]-2,7-naphthyridines and the 'unexpected' formation of 1,3-diamino-2,7-naphthyridines ( a Smiles type rearrangement).
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