Aqueous organic two-phase reactions are known to be catalyzed by quarternary ammonium or phosphonium salts, 1) crown ethers, 2) cryptands, 3) d-phosphoryl sulfoxides, 4) and phosphoric triamides. 5,6) Recently, the onium salts, 7-10) crown ethers, S,9,11) and cryptands\*) immobilized on polymer sup
Polymer-supported cryptands as catalysts for phase-transfer reactions
โ Scribed by M. Tomoi; K. Kihara; H. Kakiuchi
- Publisher
- Elsevier Science
- Year
- 1979
- Tongue
- French
- Weight
- 137 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0040-4039
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โฆ Synopsis
Polymer-supported cryptands were prepared by the reaction of hydroxyl-containing cryptands and chloromethylated polystyrene resin. The polymer-supported cryptands were effective catalysts for aqueous organic two-phase reactions.
๐ SIMILAR VOLUMES
Summa'ry. Oligoether residues with terminal 8-quinolyl donor groups have been loaded virtually quantitatively onto polystyrene resin supports and function more effectively than dibenzo-18-crown-6 as solid/liquid phase transfer catalysts in Williamson ether syntheses. Oligoethylene oxide species are
Spacer-modified polymer supports have been synthesized through the polymeric Grignard reagent method. Phosphonium-active sites were then introduced into these supports and the polymer-supported phosphonium salts were used as phase transfer catalysts for the nucleophilic substitution reactions. lnflu