Results 311 to 320 of about 64,409 (320)

The Direct Carboxylation of Pyrazoles

Synthesis, 1986
AbstractThe pyrazole‐4‐carboxylic acids (III) are prepared by reacting the pyrazoles (I) with excess oxalyl chloride, followed by hydrolysis.
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Pyrazoles VII: nitration of 1,4-disubstituted pyrazoles

Tetrahedron Letters, 1970
Pauline Cohen-Fernandes, Clarisse L. Habraken, K.C. van Erk, S. Balian   +3 more
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Structure of pyrazole

The Journal of Physical Chemistry, 1967
Curt W. Reimann, Alan D. Mighell
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Thermal rearrangements of 3H-pyrazoles, 4H-pyrazoles, and cyclopentadienes

1992
3H-Pyrazoles generally undergo thermal rearrangement by concerted [1,5]-sigmatropic migrations. It has been discovered that 3H-pyrazoles 111a-e undergo thermal rearrangement by an alterative mechanism. A stepwise, ion-pair, mechanism operates in these rearrangements, in benzene/toluene, chloroform, and methanol solvents.
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Researches on pyrazoles [PDF]

Chemistry of Heterocyclic Compounds, 1966
N. I. Bobrova, I. I. Grandberg
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Pyrazole derivatives of boron

Chemischer Informationsdienst, 1985
Swiatoslaw Trofimenko, Kurt Niedenzu
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Pyrazoles

1996
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Chloromethylation of pyrazole ring

Russian Journal of General Chemistry, 2015
A. A. Saakyan, A. G. Hasratyan, V. I. Rstakyan, H. S. Attaryan   +3 more
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Pechmann pyrazole synthesis [PDF]

, 2002
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Kinetics and Mechanism of Iodination of Pyrazole. Comparative Reactivities of Pyrazole and Imidazole

Journal of the American Chemical Society, 1964
Virginia L. Vaughan, Don G. Lambert, John D. Vaughan   +2 more
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