Sulphur dehydrogenation process to yield 5-methyl-2-pyridone

Details Sulphur dehydrogenation process to yield 5-methyl-2-pyridone Sulphur dehydrogenation process to yield 5-methyl-2-pyridone

1985-04-22

1987-02-24

Rotman, Alan L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D21186

Patent

active

046458395

ABSTRACT:
A method for synthesizing the aromatic compound 5-methyl-2-pyridone from the corresponding 3,4-dihydro compound by dehydrogenation using sulphur. Particular advantages are achieved by reaction at about 180.degree. C. or less. The product is useful as an intermediate for the preparation of various pyridyloxyphenoxy herbicides.

REFERENCES:
Fieser & Fieser, Reagents for Organic Synthesis, vol. I, p. 713, Wiley Publishers, 1967.
Fieser & Fieser, Reagents for Organic Synthesis, vol. 6, pp. 556-557, Wiley-Interscience Publishers, (1977).
Shono et al, "A New Practical Synthesis of 5-Hydroxy-3,4-dihydrocarboxtyril and 5-Hydroxycarbostyril", J. Org. Chem., vol. 46, p. 3719 (1981).
Herz et al, "Pyrrolopyridines.IV.Synthesis of Possible Intermediates", J. Org. Chem., vol. 26, pp. 122-125 (1961).
Davies et al, "Intramolecular Cycloaddition Reactions of Mono- and Di-hydroxypryimidines", J.C.S. Perkin I, pp. 1293-1297 (1978).
Al-Hajjar et al, "Reactions of .alpha.,.beta.-Unsaturated Ketones with Cyanoacetamide", J. Heterocyclic Chem., vol. 17, pp. 1521-1525 (1980).
Seoane, et al, "Synthesis of Heterocyclic Compounds XIX.sup.1 Preparation of 4,6-Diaryl-3,5-Dicyano-2-Pyridones", Heterocycles, vol. 14, pp. 639-642, No. 5, (1980).
Shamma et al, "Unsaturated Lactams. II..sup.1 The Catalytic Dehydrogenation of .alpha.,.beta.-Unsaturated Valero-Lactams to Pyridones.sup.2 ", vol. 26, pp. 2586-2587 (1961).
Trolliet et al, "Obtention de Pyrones-2, Par Deshydrogenation de Lactones d'Enol", Bulletin de la Societe Chimique de France, No. 7-8, pp. 1484-1486, (1974).
Spath et al, "Uber Peganin-Derivate und ihre Pikrolonate", Berichte der Deutschen Chemischen Gesellschaft, vol. 69, pp. 2052-2061 (1936).
Muller et al, "Methoden der Organischen Chemie", Georg Thieme Verlag Stuttgart, pp. 391-418 (1981).

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