Results 171 to 180 of about 5,642 (192)

ChemInform Abstract: PHOTOISOMERIZATION OF 4‐PYRIDONES TO 2‐PYRIDONES

Chemischer Informationsdienst, 1974
AbstractBestrahlung (Hg‐Mitteldrucklampe) der 4‐Pyridone (I) liefert die isomeren 2‐Pyridone (II) als Hauptprodukte, während die 4‐Pyridone (III) unter gleichen Bedingungen unverändert bleiben.
NOBUYUKI ISHIBE, JUN MASUI
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INFRARED SPECTRA OF COMPLEXES OF 4-PYRIDONES

Canadian Journal of Chemistry, 1963
The infrared spectra of many complexes of Lewis acids with some 4-pyridones have been recorded. Large shifts to lower frequencies of about 100 cm−1 have been observed in a band near 1560 cm−1 as the Lewis acid strength increased. Much smaller shifts of about 5 to 10 cm−1 in a band near 1640 cm−1 were noted.
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Synthesis and physical properties of new 4-pyridone extractants

Journal of Inorganic and Nuclear Chemistry, 1974
Abstract The synthesis and physical properties of 3-hydroxy-2-methyl-1-phenyl-4-pyridone (HX) and 3-hdroxy-2-methyl-1-(4-tolyl)-4-pyridone (HY) are described and discussed. The ionization constants of HX and HY were determined spectrophotometrically and by potentiometric titration.
B. Tamhina, K. Jakopčić, F. Zorko, M.J. Herak   +3 more
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A Novel Synthesis of 2,3‐Disubstituted‐4‐pyridones from 4‐Methoxypyridine.

ChemInform, 2006
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Hideo Kitagawa, Ko Kumura, Kunio Atsumi
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Cephalosporin derivatives with 2- and 4-pyridone groups at carbon-3

Journal of Medicinal Chemistry, 1979
Two compounds, analogues of cephalexin with 2- and 4-pyridone groups at C-3, were prepared. Biological evaluation found the compounds to exhibit activity against Gram-positive and Gram-negative organisms in vitro and in vivo. The compounds were only active in vivo on subcutaneous administration.
M L, Edwards, R C, Erickson
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Dipole moment studies of some derivatives of 4-pyridone

Australian Journal of Chemistry, 1972
The dipole moments of 13 derivatives of 4-pyridone were measured. Attempts to obtain a value for 4-pyridone were unsuccessful but a value of 6.O D is compatible with other evidence. Dipole moment and n.m.r, evidence indicated that for N-phenyl-4-pyridone the phenyl group is inductively electron-repelling (in contrast to that reported)1,2 for N ...
BD Batts, AJ Madeley
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Photochemical rearrangement of 4-pyridones

Journal of the American Chemical Society, 1973
Nobuyuki. Ishibe, Jun. Masui
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Reaction of 2,3-Dihydro-4-pyridone

Bulletin of the Chemical Society of Japan, 1969
Noboru Sugiyama, Makoto Yamamoto, Choji Kashima   +2 more
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Photoisomerization of 4-pyridones to 2-pyridones

Journal of the American Chemical Society, 1974
Nobuyuki Ishibe, Jun Masui
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ChemInform Abstract: PHOTOCHEMICAL REARRANGEMENT OF 4-PYRIDONES

Chemischer Informationsdienst, 1973
NOBUYUKI ISHIBE, JUN MASUI
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