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ChemInform Abstract: Reactions of Pyrazolin‐Azomethin Dyes with 2‐Pyrazolin‐5‐one.
Chemischer Informationsdienst, 1986AbstractThe dyes (III), obtained from the pyrazolinone (I) and the oxidized photographic developer (II), are decolorized with excess (I) by the formation of the bispyrazolone (IV) in two steps.
J. GACA +3 more
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A study of pyrazolin-5-one tautomerism—II
Tetrahedron, 1969Abstract The tautomerism of four 1-aryl-2-pyrazolin-5-ones not bearing a 3-substituent has been studied using NMR and IR spectroscopy. In carbon tetrachloride and chloroform solutions compounds without a 4-substituent exist essentially in the CH form (I). However, in the presence of a 4-ethoxycarbonyl substituent the NH form (II) is favoured. Results
G.A. Newman, P.J.S. Pauwels
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ChemInform Abstract: STEROIDAL PYRAZOLINES
Chemischer Informationsdienst, 1978AbstractBei der Umsetzung mit den Phenylhydrazonen (IIa) und (IIb) erhält man aus 21‐Benzal‐5‐pregnen‐3β‐ol‐20‐on‐acetat (I) die Cyclisierungsprodukte (III).
P. CATSOULACOS, C. I. STASSINOPOULOU
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Pyrazolines and their rearrangement to form pyrazoles. II. (Pyrazole and pyrazoline derivatives, IV)
Recueil des Travaux Chimiques des Pays-Bas, 1943AbstractUpon the addition of diphenylenediazomethane to the methyl esters of acetylene dicarbonic acid, of phenylpropiolic acid and of propiolic acid, pyrazolenines are formed which, under different circumstances and with the migration of several groups, undergo rearrangement to give pyrazoles.
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2‐pyrazolines with herbicidal activity
Pesticide Science, 1990AbstractN‐(2‐pyrazolin‐1‐ylformyl)benzenesulfonamides form a new group of compounds with interesting herbicidal activity. Some of the chemical, biological and biochemical characteristics of this group are described. The herbicidal activity is mainly expressed as a post‐emergence activity on dicotyledonous weed species. The compounds appear to interfere
Jac H. H. Eussen +3 more
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Current Topics in Medicinal Chemistry
Background: A heterocyclic molecule containing five rings, three carbon atoms, two nitrogen atoms, and a single endocyclic bond is called pyrazoline. Because of its intriguing electrical characteristics and potential for dynamic applications, pyrazoline is one type of electron-rich nitrogen carrier that is becoming more and more popular.
Pushkar Kumar Ray +2 more
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Background: A heterocyclic molecule containing five rings, three carbon atoms, two nitrogen atoms, and a single endocyclic bond is called pyrazoline. Because of its intriguing electrical characteristics and potential for dynamic applications, pyrazoline is one type of electron-rich nitrogen carrier that is becoming more and more popular.
Pushkar Kumar Ray +2 more
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Evaluating the Synthesis of Bis‐pyrazolines
Journal of Heterocyclic Chemistry, 2013The bis‐cyclization of chalcone with thiosemicarbazide under basic condition led to the formation of new compounds, thiocarbamoyl bis‐pyrazoline derivatives. Bis‐chalcones were prepared by a Claisen–Schmidt condensation between 1 mol bis‐aldehyde and 2 mol acetophenone derivatives in the presence of sodium hydroxide as a catalyst. The structures of all
Nosrat O. Mahmoodi +3 more
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Electrochemical Synthesis of Pyrazolines and Pyrazoles via [3+2] Dipolar Cycloaddition
Angewandte Chemie - International Edition, 2023Silja Hofmann, Siegfried R Waldvogel
exaly
Allergy from pyrazoline derivatives
Contact Dermatitis, 1986L, Fernández de Corres +4 more
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