Phasentransferkatalysen durch ein polymers mit dibenzo‐18‐krone‐6 als ankergruppe

Among numerous polymers with cyclic polyethers and non‐cyclic ethers as anchor groups, the condensation resin with dibenzo‐18‐crown‐6 as anchor group (℗‐DB‐18‐C‐6), which can be easily prepared, exhibits the best properties for phase‐transfer catalysis. It catalyses substitution, dichlorocarbene and polymerisation reactions which do not take place at all or only in a low yield without the catalyst. For substitution reaction the highest yields are up to 95% in the liquid phase and up to 70% in the gaseous phase. For chlorocarbene reactions yields up to 76% are reached. For the polymerisation of 2‐pyrrolidone, started by potassium 2‐pyrrolidonate, the yield is at 80%.