Results 171 to 180 of about 42,319 (209)

Synthesis of pyrazoles and condensed pyrazoles

Journal of Heterocyclic Chemistry, 1999
AbstractThis review introduces the synthesis of various pyrazoles reported by us and some other research groups during 1989–1998. Some of papers in this review deal with the development of potent pyrazoles or with the synthesis of potential pyrazoles aiming at agrochemicals and/or drugs.
Kenzi Makino, Yoshihisa Kurasawa, Ho Sik Kim   +2 more
openaire   +3 more sources

Pyrazoles. III. PMR studies of pyrazoles

Recueil des Travaux Chimiques des Pays-Bas, 1967
AbstractSubstituents with electron withdrawing capacities are found to induce a paramagnetic displacement of the chemical shifts of protons and methyl groups in the remaining positions of the pyrazole ring. For the 4‐position this effect is considered to be due primarily to resonance interaction of substituent and pyrazole ring.
J. C. P. Westgeest, Clarisse L. Habraken, H. J. Munter   +2 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.
Ho Sik Kim, Yoshihisa Kurasawa, Kenzi Makino   +2 more
openaire   +3 more sources

Nickel(II) complexes of pyrazole and substituted pyrazoles

Journal of Inorganic and Nuclear Chemistry, 1970
Abstract Complexes of pyrazole (pz), 3-methylpyrazole (3MePz) and 3,5-dimethylpyrazole (DMP) with nickel(II) salts can be crystallised from aqueous or ethanolic solutions. With pyrazole, tetragonal complexes of the type NiX2(pz)2 (X = Cl, Br) and Ni X 2 ( pz ) 4 (X = Cl, Br, NO 3 , 1 2 SO 4 ) are formed while 3-
David Nicholls, B.A. Warburton
openaire   +2 more sources

Pyrazole–coumarin and pyrazole–quinoline chalcones as potential antitubercular agents

Archiv der Pharmazie, 2020
AbstractPyrazole, coumarin, and quinoline are medicinally important moieties. In this study, two series of novel pyrazole–coumarin chalcones and pyrazole–quinoline chalcones were synthesized using multiple‐step reactions. All the synthesized compounds were well characterized using different spectroscopic techniques including 1H and 13C nuclear magnetic
Gautam Kumar, Vagolu Siva Krishna, Dharmarajan Sriram, Sanjay M. Jachak   +3 more
openaire   +3 more sources

Pyrazole analogues of prazosin

Il Farmaco, 1998
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ERMONDI, Giuseppe, BOSCHI, Donatella, DI STILO, Antonella, TIRONI, Carla, GASCO, Alberto   +4 more
openaire   +4 more sources

Pyrazole: preclinical reassessment

Investigational New Drugs, 1988
Pyrazole (NSC-45410) is a low molecular weight, heterocyclic compound which has been considered for reevaluation in the clinic as a potential cytotoxic agent (Fig. 1). Discovered in 1893, pyrazole is best known as an inhibitor of liver alcohol dehydrogenase (ki = 0.2 uM), and as a result, has been used extensively in studies of alcohol metabolism.
Jacqueline Plowman, Peter J. O'Dwyer, Susan A. King, Brian Leyland-Jones, Charles K. Grieshaber, Daniel Hoth   +5 more
openaire   +3 more sources

ChemInform Abstract: MICROWAVE SPECTRA OF ISOTOPIC PYRAZOLES AND MOLECULAR STRUCTURE OF PYRAZOLE

Chemischer Informationsdienst, 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, G. Ole Soerensen, Dines Christen, Erik Vestergaard, Ejner Pedersen, Ole Snerling, J.Tormod Nielsen   +6 more
openaire   +3 more sources

Studies on pyrazoles

Chemistry of Heterocyclic Compounds, 1972
A new method has been developed for the synthesis of N-vinylpyrazoles from pyrazoles not substituted at the nitrogen atom. This synthesis is accomplished by the action of vinyl acetate and is catalyzed by mercuric sulfate.
I. I. Grandberg, L. F. Morozova, V. A. Moskalenko, A. N. Kost   +3 more
openaire   +2 more sources