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Synthesis of the Steroidal Pyrazolines.
ChemInform, 2004AbstractFor Abstract see ChemInform Abstract in Full Text.
Shamsuzzaman Shamsuzzaman +1 more
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4-Isopropylidene-3,3,5,5-tetramethyl-Δ1-pyrazoline - an almost flat pyrazoline
Tetrahedron Letters, 1982Abstract The X-ray crystallographic structure of the title compound 6 shows that it is almost planar. This helps to explain a number of peculiar features in the chemistry of α-methylated pyrazolines.
Richard J. Bushby +2 more
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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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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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Δ1‐pyrazolines: (Pyrazol and pyrazoline derivatives II
Recueil des Travaux Chimiques des Pays-Bas, 1943AbstractΔ1‐pyrazolines, in which the double bond is situated between the two nitrogen atoms can be prepared by the addition of diphenyldiazomethane to the diphenyl ester of citraconic acid and to the trimethyl ester of aconitic acid. These compounds split off nitrogen at higher temperatures forming cyclopropane derivatives.Diphenyl diazomethane ...
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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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Canadian Journal of Chemistry, 1960
Product analysis has been carried out on the pyrolysis reaction in the liquid and vapor phase of 4- and 5-methyl-3-carbomethoxy-Δ2-pyrazolines and 3-methyl-3-carbomethoxy-Δ1-pyrazoline. The proportion of cyclopropane product was found to be greater than earlier reports had indicated and was higher for the vapor-phase pyrolysis than for the liquid ...
Donald E. McGreer +2 more
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Product analysis has been carried out on the pyrolysis reaction in the liquid and vapor phase of 4- and 5-methyl-3-carbomethoxy-Δ2-pyrazolines and 3-methyl-3-carbomethoxy-Δ1-pyrazoline. The proportion of cyclopropane product was found to be greater than earlier reports had indicated and was higher for the vapor-phase pyrolysis than for the liquid ...
Donald E. McGreer +2 more
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Collection of Czechoslovak Chemical Communications, 1994
The biological activity of azoles, pyrimidines as well as pyrazolines are of interest. Formation of pyrazolines and related compounds from hydrazine derivatives and α,β-unsaturated carbonyl compounds is very common. Pyrazoline fused with different heterocyclic nuclei at position 4 and 5 have been reported.
F. M. Abd El Latif +4 more
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The biological activity of azoles, pyrimidines as well as pyrazolines are of interest. Formation of pyrazolines and related compounds from hydrazine derivatives and α,β-unsaturated carbonyl compounds is very common. Pyrazoline fused with different heterocyclic nuclei at position 4 and 5 have been reported.
F. M. Abd El Latif +4 more
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Canadian Journal of Chemistry, 1965
cis- and trans-3.5-Dimethyl-3-carbomethoxy-Δ1-pyrazoline (IV and V) have been separated, and product analysis for the pyrolysis and photolysis of these compounds has been completed. The cyclopropane products are formed with some change in the relative configuration of the cis–trans groups in both reactions. The α,β-unsaturated olefin product is formed
Donald E. McGreer +3 more
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cis- and trans-3.5-Dimethyl-3-carbomethoxy-Δ1-pyrazoline (IV and V) have been separated, and product analysis for the pyrolysis and photolysis of these compounds has been completed. The cyclopropane products are formed with some change in the relative configuration of the cis–trans groups in both reactions. The α,β-unsaturated olefin product is formed
Donald E. McGreer +3 more
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Pyrazolines IX. Chemistry of some 3-cyano-3-carbomethoxy-1-pyrazolines
Canadian Journal of Chemistry, 1969Product and kinetic studies have been made on the pyrolysis of a series of 3-cyano-3-carbomethoxy-1-pyrazolines substituted at C-4 with a methyl and an aryl group (phenyl, p-methoxyphenyl, and p-nitrophenyl). Evidence is presented supporting a transition state structure in which little progress to bond breaking of the C-5 to N bond has taken place at ...
Donald E. McGreer, Y. Y. Wigfield
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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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