Studies on Prototropic Tautomerism in Nitrogen Heterocyclic Compounds. II. A Ring-Chain Tautomerism in 3-Hydroxy-6-(2-oxocycloalkyl)-methyl-2(1H)-pyridone and 3-Hydroxy-6-(3-oxoalkyl)-2(1H)-pyridone Derivatives
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چکیده
منابع مشابه
Synthesis of 4-Pyridone-3-sulfate and an improved synthesis of 3-Hydroxy-4-Pyridone
An improved synthesis of 3-hydroxy-4-pyridone via an Elbs oxidation of 4-pyridone and isolation of 4-pyridone-3-sulfate is described.
متن کاملChannel-forming solvate crystals and isostructural solvent-free powder of 5-hydroxy-6-methyl-2-pyridone.
Crystals of 5-hydroxy-6-methyl-2-pyridone, (I), grown from a variety of solvents, are invariably trigonal (space group R3); these are 5-hydroxy-6-methyl-2-pyridone acetone 0.1667-solvate, C(6)H(7)NO(2)·0.1667C(3)H(6)O, (Ia), and 6-methyl-5-hydroxy-2-pyridone propan-2-ol 0.1667-solvate, C(6)H(7)NO(2)·0.1667C(3)H(8)O, (Ib), and the forms from methanol, (Ic), water, (Id), benzonitrile, (Ie), and b...
متن کاملSynthesis, structure and solvatochromic properties of some novel 5-arylazo-6-hydroxy-4-phenyl-3-cyano-2-pyridone dyes
UNLABELLED BACKGROUND A series of some novel arylazo pyridone dyes was synthesized from the corresponding diazonium salt and 6-hydroxy-4-phenyl-3-cyano-2-pyridone using a classical reaction for the synthesis of the azo compounds. RESULTS The structure of the dyes was confirmed by UV-vis, FT-IR, 1H NMR and 13C NMR spectroscopic techniques and elemental analysis. The solvatochromic behavior ...
متن کامل5-[(3-Fluorophenyl)(2-hydroxy-6-oxocyclohex-1-en-1- yl)methyl]-6-hydroxy-1,3-dimethylpyrimidine-2,4(1H, 3H)-dione
5-[(3-Fluorophenyl)(2-hydroxy-6-oxocyclohex-1-en-1-yl)-methyl]-6-hydroxy-1,3-dimethylpyrimidine-2,4(1H,3H)-dione 3 was synthesized via a multicomponent reaction. The Aldol–Michael addition reactions of N,N-dimethylbarbituric acid, cyclohexane-1,3-dione, and 3-fluorobenzaldehyde in aqueous solution gave the product in high yield. The molecular structure of the compound was confirmed by spectrosc...
متن کاملSYNTHESIS OF 8-HYDROXY-6-METHOXY- 3-UNDECYLISOCOUMARIN AND 2-HY DROXY - 4-METHOXY-6-(2-OXOTRIDECYL) BENZOIC ACID
Straightforward conversion of (+)-6,8-dimethoxy-3,4-dihydro-3- undecylisocoumarin (3) to the title isocoumarin was carried out. Hydrolytic ring opening of (3) afforded the hydroxy acid (4) which was immediately oxidized to keto acid (5) using chromic acid, Cyclodehydration of (5) afforded the 6,8- dimethoxy-3-undecylisocoumarin (6) which on selective demethylation of 8- methoxy group furni...
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ژورنال
عنوان ژورنال: Chemical and Pharmaceutical Bulletin
سال: 1969
ISSN: 0009-2363,1347-5223
DOI: 10.1248/cpb.17.425