๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Optimization of polymer-supported oligoethers as solid-liquid phase transfer catalysts

โœ Scribed by J.G. Heffernan; D.C. Sherrington


Publisher
Elsevier Science
Year
1983
Tongue
French
Weight
233 KB
Volume
24
Category
Article
ISSN
0040-4039

No coin nor oath required. For personal study only.

โœฆ Synopsis


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 known to be useful and cheap phase transfer catalysts and their practical applicability can be improved by supporting them on polystyrene resins2 when they function similarly to other 'triphase' catalysts'


๐Ÿ“œ SIMILAR VOLUMES


Polymer-supported cryptands as catalysts
โœ M. Tomoi; K. Kihara; H. Kakiuchi ๐Ÿ“‚ Article ๐Ÿ“… 1979 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 137 KB

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.

Polymer-supported phosphoric triamides a
โœ M. Tomoi; M. Ikeda; H. Kakiuchi ๐Ÿ“‚ Article ๐Ÿ“… 1978 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 142 KB

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