Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Article, Journal of Medicinal Chemistry called Potential antimicrobial furans, Author is Hoyle, William; Roberts, Gordon P.; Meth-Cohn, Otto, which mentions a compound: 2689-65-8, SMILESS is IC1=CC=C(O1)C=O, Molecular C5H3IO2, Computed Properties of C5H3IO2.
Furan derivatives bearing isosteric and isoelec. functional groups in place of a 2-nitro group lacked antibacterial activity, confirming the essential role of the nitro group in activity. Functional groups employed were sulfo, sulfamoyl, carboxyl, methoxycarbonyl, carbamoyl, and cyano. For example, 5-iodo-2-furaldehyde [2689-65-8] reacted with Cu2(CN)2 in DMF to form 5-formyl-2-furonitrile [42061-89-2], which was condensed with semicarbazide [57-56-7], 3-amino-2-oxazolidinone, or 1-aminohydantoin to yield 5-cyano-2-furancarboxaldehyde semicarbazone [42061-90-5], 3-[[(5-cyano-2-furanyl)methylene]amino]-2-oxazolidinone [42978-22-3], and 1-[[(5-cyano-2-furanyl)methylene]amino]-2,4-imidazolidinedione (I) [42061-92-7], resp.
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Reference:
1,8-Naphthyridine – Wikipedia,
1,8-Naphthyridine | C8H6N2 – PubChem