Transformations of 3-nitropyridin-4(1H)-one and 1-Methyl-3-nitropyridin-4(1H)-one in reaction with hydrazine
摘要:
Hydrazinolysis of 3-nitropyridin-4(1H)-one and its N-methyl derivative leads to the formation of 1-(1H-pyrazol-3-yl)ethanone hydrazone whose structure was confirmed by independent synthesis from authentic 3-acetyl-1H-pyrazole and comparison of the IR and (1)H NMR spectra. Oxidation of 1-(1H-pyrazol-3- yl)ethanone hydrazone with potassium permanganate gave 1H-pyrazole-3-carboxylic acid.
Solvent and substituent effects on the conversion of 4-methoxypyridines to N-methyl-4-pyridones
作者:Xiao Yi、Jing Chen、Xiuling Xu、Yongmin Ma
DOI:10.1080/00397911.2017.1290804
日期:2017.5.3
ABSTRACT In the reaction of 4-methoxypyridine derivatives with alkyl iodides in the presence or absence of solvent, not only the pyridinium ions but also the related 1-methylpyridones are produced. The presence of solvent favors the formation of the 1-methylpyridone. Electron withdrawing groups on the pyridine ring also favor this conversion. A possible mechanism is presented. GRAPHICAL ABSTRACT
Acylarylnitrosamines. Part VII. Reactions of 3-aminomethoxypyridines and 3-amino-1-methylpyridones. The preparation of 2-methoxy-3-phenyl-, 4-methoxy-3-phenyl-, and 2-methoxy-5-phenylpyridine
作者:Yusuf Ahmad、D. H. Hey
DOI:10.1039/jr9540004516
日期:——
Bickel; Wibaut, Recueil des Travaux Chimiques des Pays-Bas, 1946, vol. 65, p. 65,82
作者:Bickel、Wibaut
DOI:——
日期:——
BROWN S. B.; DEWAR M. J. S., J. ORG. CHEM. 1978, 43, NO 7, 1331-1337
作者:BROWN S. B.、 DEWAR M. J. S.
DOI:——
日期:——
Takahashi; Koshiro, Yakugaku Zasshi/Journal of the Pharmaceutical Society of Japan, 1959, vol. 79, p. 1123,1125