2, 5-Dicarbonyl Sugars : New Intermediates for Synthesising Heterocyclic Rings. II. Synthesis of N-Substituted 5-Oxidopyridazinium Derivatives from 2, 5-Diketo-D-gluconate
2, 5-Diketo-D-gluconate (I) (D-threo-2, 5-hexodiulosonate) reacted with mono substituted hydrazines yielding anhydro 1-substituted 3-hydroxymethyl-5-hydroxypyridazinium hydroxides (IIa-g) which were a type of zwitterionic heterocyclic compounds, relatively unknown. Their structures were confirmed by...
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Published in | Chemical & pharmaceutical bulletin Vol. 22; no. 8; pp. 1732 - 1738 |
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Main Author | |
Format | Journal Article |
Language | English |
Published |
The Pharmaceutical Society of Japan
1974
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Online Access | Get full text |
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Summary: | 2, 5-Diketo-D-gluconate (I) (D-threo-2, 5-hexodiulosonate) reacted with mono substituted hydrazines yielding anhydro 1-substituted 3-hydroxymethyl-5-hydroxypyridazinium hydroxides (IIa-g) which were a type of zwitterionic heterocyclic compounds, relatively unknown. Their structures were confirmed by their microanalytical results and spectroscopic evidences. The intermediate in the formation of anhydro 3-hydroxymethyl-5-hydroxy-1-phenyl-pyridazinium hydroxide was obtained. The structure (VIIc) (tautomeric 5-phenylhydrazone of 4-deoxy-2, 5-hexodiulosonate-3-ene) could be substantiated by spectral data. The formation of IIa-g might be accounted for in terms of mono phenylhydrazone formation, enediol formation, β-hydroxycarbonyl elimination, decarboxylation and cyclization. |
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ISSN: | 0009-2363 1347-5223 |
DOI: | 10.1248/cpb.22.1732 |