Features of the reaction of 4-bromobut-2-enylphosphonium salts with monosubstituted hydrazines

doi:10.1134/s1070363214030141

Paper

Features of the reaction of 4-bromobut-2-enylphosphonium salts with monosubstituted hydrazines

Published Apr 13, 2014 · DOI · M. Z. Ovakimyan, G. T. Gasparyan, M. R. Grigoryan

Russian Journal of General Chemistry

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Abstract

Abstract(4-Bromobut-2-en-1-yl)triphenylphosphonium bromide reacted with phenylhydrazine at 2°C in the presence of sodium carbonate to form triphenyl[4-(2-phenylhydrazinylidene)but-2-en-1-yl]phosphonium bromide in 62% yield. The obtained N-phenylhydrazine derivatives cyclized into the corresponding pyrazoline derivatives of phosphonium salts. Unlike phenylhydrazine, ethylhydrazine reacted with (4-bromobut-2-ene-1-yl)triphenylphosphonium bromide under the same conditions to afford triphenyl[(1-ethyl-4,5-dihydro-1Hpyrazol-3-yl)methyl]- and -[(1-ethyl-1H-pyrazol-3-yl)methyl]phosphonium bromides in yields of 60 and 40%.

Study Snapshot

This study demonstrates that 4-bromobut-2-enylphosphonium salts can react with monosubstituted hydrazines to produce triphenyl[4-(2-phenylhydrazinylidene)but-2-en-1-yl]phosphonium bromid

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

Features of the reaction of 4-bromobut-2-enylphosphonium salts with monosubstituted hydrazines

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