Phase‐transfer reactions catalyzed by polymer‐supported crown ethers

Abstract

AbstractPolymer‐supported crown ethers were prepared from chloromethylated or ω‐bromoalkylated polystyrene resins and hydroxymethylbenzo‐18‐crown‐6 and 15‐ or 18‐membered monoazacrown ethers. Effects of the cavity size of crown ethers, the degree of crosslinking, the degree of ring substitution, particle size, spacer chains, and solvents on the activity of the polymer‐supported crown ethers in the reaction of 1‐chloro‐ or 1‐bromo‐octane with aqueous NaI or KI were investigated and mechanisms of the reaction were discussed in terms of mass transfer, intraparticle diffusion, and intrinsic reactivity.