Results 181 to 190 of about 4,108 (208)

Insignificant antitubercular activity of pyrazoline, phenyl pyrazoline and isoxazoline moiety in lupeol

Journal of Pharmaceutical Negative Results, 2015
Aim: The Present study is to investigate the antimycobacterial activity of pyrazoline, phenyl pyrazoline and isooxazoline moiety containing lupeol. The main purpose to show insignificant antimicrobial activity of these lupeol derivatives and hence that further researchers do not waste time to investigate antitubercular activity of these group ...
Vandana Khattar, Ankita Wal, AK Rai
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A Pyrazoline Derivative of Eunicin Acetate

Acta Crystallographica Section C Crystal Structure Communications, 1996
The present crystal structure determination established spiro [¿3a,4,5,6,7,8,11,12,13,14,15,15a-dodecahydro-6,10,14-trimet hyl-2-oxo-5, 15-epoxy-3H-cyclotetradeca-[b]furan¿-3,3'-1'-pyrazoline]-6-yl acetate, C23H34N2O5, as a pyrazoline derivative of eunicin acetate.
S, Khalil, M B, Hossain, D, van der Helm, M, Alam, R, Sanduja   +4 more
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Pyrazolines. VII. Concerning the formation of olefins from the pyrolysis of pyrazolines

Canadian Journal of Chemistry, 1967
The geometrically isomeric cis- and trans-5-3-methyl-4-ethyl-3-carbomethoxy-Δ1-pyrazolines were prepared and their pyrolysis and photolysis studied. The isomeric pyrazolines gave cyclopropane products of mixed stereochemistry, but predominantly with retention of the stereochemistry present in the starting pyrazoline.
Donald E. McGreer, Weh-Sai Wu
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ChemInform Abstract: Reactions of Pyrazolin‐Azomethin Dyes with 2‐Pyrazolin‐5‐one.

Chemischer Informationsdienst, 1986
AbstractThe 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, K. KOZLOWSKI, M. TRZCINSKA, Z. KUCYBALA   +3 more
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ChemInform Abstract: PYRAZOLINE 9. MITT. CHEMIE EINIGER 3‐CYAN‐3‐CARBOMETHOXY‐1‐PYRAZOLINE

Chemischer Informationsdienst. Organische Chemie, 1970
AbstractAus den trans‐Zimtsäurederivaten (I) und Diazomethan (II) entstanden die instabilen trans‐Verbindungen (III), die ihrerseits mit Diazomethan (II) zu den trans‐Pyrazolinen (IV) reagierten.
DONALD E. MCGREER, Y. Y. WIGFIELD
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2‐pyrazolines with herbicidal activity

Pesticide Science, 1990
AbstractN‐(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, Jo L. G. Thus, Koos Wellinga, Bob Stork   +3 more
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Pyrazolines X. Kinetics for the pyrolysis of some deuterated 1-pyrazolines in solution

Canadian Journal of Chemistry, 1969
The kinetics and product distribution have been measured for the pyrolysis of 3-methyl-3-carbo-methoxy-1-pyrazoline (1) and its 4,4-d2 and 5,5-d2 analogues in tetralin, n-butyl phthalate, nitrobenzene, and formamide. The isotope effect kH/kD for 1-5,5-d2 of 1.22 and for 1-4,4-d2 of 1.36 is consistent with a mechanism involving migration of the C-4 ...
Donald E. McGreer, Ian M. E. Masters
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Enehydrazines derivees de la pyrazoline

Tetrahedron Letters, 1980
Abstract Two cyclic enehydrazines are synthesized from acetylenic epoxides : one of them is stable, the other one, not isolable, duplicates to a tricyclic spiran whose structure is discussed.
Jean-Louis Avril, Joëlle Mayrargue, Marcel Miocque   +2 more
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Synthesis of the Steroidal Pyrazolines.

ChemInform, 2004
AbstractFor Abstract see ChemInform Abstract in Full Text.
Shamsuzzaman Shamsuzzaman, Nazish Siddiqui   +1 more
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Pyrazolines and their rearrangement to form pyrazoles. II. (Pyrazole and pyrazoline derivatives, IV)

Recueil des Travaux Chimiques des Pays-Bas, 1943
AbstractUpon 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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