Results 181 to 190 of about 20,139 (226)

Pyrazole, 3(5)-methyl pyrazole and 3,5-dimethyl pyrazole complexes of tin(IV) halides

Inorganica Chimica Acta, 1977
Abstract Complexes of tin(IV) halides with pyrazole, 3(5)methyl pyrazole and 3,5-dimethyl pyrazole of the type SnX4·L2 were prepared. All the isolated solids were non-electrolytes in acetonitrile. The IR spectra of the complexes (600–180 cm−1 were consistent with a trans-octahedral configuration in the solids state.
J.R. Masaguer, E. Freijanes, J. Sordo, J.S. Casas, M.R. Bermejo   +4 more
openaire   +1 more source

Microwave spectra of isotopic pyrazoles and molecular structure of pyrazole

Journal of Molecular Structure, 1974
Abstract Microwave spectra of the complete set of monosubstituted isotopic pyrazoles have been investigated and the complete r s structure of pyrazole determined. The deuterated and 15 N species of pyrazole were prepared, while the 13 C species were examined in natural abundance.
Lise Nygaard, Dines Christen, J.Tormod Nielsen, E.Jonas Pedersen, Ole Snerling, Erik Vestergaard, G.Ole Sørensen   +6 more
openaire   +1 more source

Octahedral molybdenum iodide clusters with pyrazole or pyrazolate ligands

Dalton Transactions
Hexaaqua or hexahydroxo molybdenum iodide cluster complexes obtained in one step were shown to be accessible complexes for synthesis of clusters with pyrazole or pyrazolate ligands.
Ksenia S. Kozlova, Alexey S. Berezin, Natalia V. Kuratieva, Michael A. Shestopalov, Anton A. Ivanov   +4 more
openaire   +2 more sources

Synthesis and Antimycobacterial Evaluation of Novel Pyrazole‐Isoxazolines and Pyrazole‐Isoxazoles

ChemBioChem
AbstractThis study reports the synthesis of a new series of pyrazole‐isoxazolines, at very good yields, from the cyclocondensation reaction of pyrazole‐enaminones with hydroxylamine hydrochloride. Dehydration of the pyrazole‐isoxazolines furnished another new series of the respective pyrazole‐isoxazoles, at excellent yields. Both series of the obtained
Paulo A. Moraes, Thaise Dill Fussinger, Tuyla Fontana, Genilson S. Pereira, Mário A. Marangoni, Adriano F. Camargo, Helio G. Bonacorso, Marcos A. P. Martins, Alencar K. Machado, Marli M. A. de Campos, Nilo Zanatta   +10 more
openaire   +2 more sources

Synthesis of pyrazoles

Journal of Heterocyclic Chemistry, 1998
AbstractThis review summarizes the synthesis of various pyrazoles reported by us and some other research groups in 1981–1989.
Kenzi Makino, Ho Sik Kim, Yoshihisa Kurasawa   +2 more
openaire   +1 more source

Knorr Pyrazole Synthesis

2009
Also known as Knorr reaction. Reaction of hydrazine or substituted hydrazine with 1,3-dicarbonyl compounds to provide the pyrazole or pyrazolone ring system. Cf. Paal–Knorr pyrrole synthesis.
openaire   +1 more source

Pyrazoles

2021
Jie Jack Li, Minmin Yang
openaire   +1 more source

Pyrazoles

Chemistry of Heterocyclic Compounds, 1970
I. I. Grandberg, V. G. Vinokurov, V. S. Troitskaya, T. A. Ivanova, V. A. Moskalenko   +4 more
openaire   +1 more source

Recent Advances in the Development of Pyrazole Derivatives as Anticancer Agents

International Journal of Molecular Sciences, 2023
Yingqian Zhang, Rui Fan, Jun Xu
exaly  

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.
openaire   +2 more sources