Ödön Fehér scite author profile

The IR, 'H and 13C NMR spectra of six esters of 1-aryl-4-methyl-3and 5-pyrazolecarbogylic acids are reported. On the bask of their spectra the 3-or 5-position of the substibent in such structural isomeric p& can be established Without recourse to the spectrum of the other member of the pair. The spectral data also give information on the conformation, which depends on the relative position and size of the heten, ring substituents.

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The ring closure and rearrangement of 1-(2-amino)-benzoyl-1-methylhydrazones of β-dicarbonyl compounds: on the formation and crystal structure of 3a,9a-dihydro- -1,3,3a,9a-tetramethyl-4H-pyrazolo[3,4-b]quinolin-4-one

Gál¹,

Fehér²,

Tihanyi³

et al. 1980

Tetrahedron Letters

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A Mesomeric Betain Pyrazolo-Oxydotriazinium Ring System. 6-Alkyl-2-methylpyrazolo[1,5-d][1,2,4]triazin-6-ium-4-olates, Synthesis and Ring Cleavege

Tihanyi¹,

Sohár²,

Fehér³

et al. 1980

HETEROCYCLES

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Gas chromatographic behaviour of substituted 6,7-dihydropyrazolo[1,5-d [1,2,4]triazin-4(5H)-ones and pyrazolecarboxylic acid hydrazones

Szederkényi¹,

Tihanyi²,

Gal³

et al. 1984

Journal of Chromatography A

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Ödön Fehér

The ring closure and rearrangement of N-2-aminobenzoyl -N-methylhydrazones of β-dicarbonyl compounds

IR, ¹H NMR and ¹³C NMR spectra of isomeric 1‐aryl‐4‐methyl‐3‐ and‐5‐pyrazolecarboxylic esters

The ring closure and rearrangement of 1-(2-amino)-benzoyl-1-methylhydrazones of β-dicarbonyl compounds: on the formation and crystal structure of 3a,9a-dihydro- -1,3,3a,9a-tetramethyl-4H-pyrazolo[3,4-b]quinolin-4-one

A Mesomeric Betain Pyrazolo-Oxydotriazinium Ring System. 6-Alkyl-2-methylpyrazolo[1,5-d][1,2,4]triazin-6-ium-4-olates, Synthesis and Ring Cleavege

Gas chromatographic behaviour of substituted 6,7-dihydropyrazolo[1,5-d [1,2,4]triazin-4(5H)-ones and pyrazolecarboxylic acid hydrazones

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Ödön Fehér

The ring closure and rearrangement of N-2-aminobenzoyl -N-methylhydrazones of β-dicarbonyl compounds

IR, 1H NMR and 13C NMR spectra of isomeric 1‐aryl‐4‐methyl‐3‐ and‐5‐pyrazolecarboxylic esters

The ring closure and rearrangement of 1-(2-amino)-benzoyl-1-methylhydrazones of β-dicarbonyl compounds: on the formation and crystal structure of 3a,9a-dihydro- -1,3,3a,9a-tetramethyl-4H-pyrazolo[3,4-b]quinolin-4-one

A Mesomeric Betain Pyrazolo-Oxydotriazinium Ring System. 6-Alkyl-2-methylpyrazolo[1,5-d][1,2,4]triazin-6-ium-4-olates, Synthesis and Ring Cleavege

Gas chromatographic behaviour of substituted 6,7-dihydropyrazolo[1,5-d [1,2,4]triazin-4(5H)-ones and pyrazolecarboxylic acid hydrazones

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IR, ¹H NMR and ¹³C NMR spectra of isomeric 1‐aryl‐4‐methyl‐3‐ and‐5‐pyrazolecarboxylic esters