ISSN:
0959-8103
Schlagwort(e):
Triphase catalysis
;
synthesis of 2,4,6-tribromophenyl benzyl ether
;
structural features of polymer support
;
Chemistry
;
Polymer and Materials Science
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
,
Maschinenbau
,
Physik
Notizen:
The substitution reaction of benzyl bromide and 2,4,6-tribromophenol in an organic solvent/alkaline aqueous solution of KOH by triphase catalysis in which tributylamine was immobilized on a polymer support was investigated. Our main purpose was to evaluate the effect of some structural features of the polymer-supported pellet on the conversion of the organic-phase reactant (benzyl bromide). The polymer-supported pellet was obtained from copolymerization of styrene and chloromethylstyrene monomers. The reaction was identified as occurring both on the surface and within the particles of the polymer support when using a highly polar solvent. The effects of the structural features of the polymer support, which are related to the degree of cross-linking, ring substitution, lipophilicity of the polymer pellet, the chloride density and the solvents, on the conversion of benzyl bromide were investigated in detail. The experimental results indicate that 2% of cross-linking with 10% ring substitution of the macroporous polymer support provides a rapid reaction and high conversion of benzyl bromide reactant.
Zusätzliches Material:
12 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/pi.1994.210340210
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