Abstract
Gels of radiation crosslinked poly(ethylene oxide) (PEO) and modified with poly(ethyleneimine) PEO were used as highly active phase transfer catalysts in the alkylation of phenylacetonitrile with 1-bromobutane in the presence of aqueous potassium hydroxide. The reaction of alkylation was found to be second order reaction up to 40% conversion of phenylacetonitrile and the rate is proportional to the amount of added catalysts. The activity of the PEO gels has been studied as a function of the composition, degree of crosslinking and addition order of reagents. Modified with poly(ethyleneimine) PEO (up to 10 mol%) exhibited the highest catalytic activity. Ultrasound promotes extremely effective intermixing of the aqueous and organic phases resulting in greatly increased alkylation rate. The recovered catalysts could be re-used without decrease in activity.
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Tsanov, T., Stamenova, R. & Tsvetanov, C. Crosslinked Poly(ethylene oxide) as a Phase Transfer Catalyst in Reactions of C- and O-Alkylation. Polym J 25, 853–861 (1993). https://doi.org/10.1295/polymj.25.853
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DOI: https://doi.org/10.1295/polymj.25.853
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