Production of a heterocycle-substituted polyarylether sulfone, useful for making polymer electrolyte membranes for fuel cells comprises halogenation, reaction with metal and reaction with a heterocycle

摘要

Production of a heterocycle-substituted polyarylether sulfone (I) comprises halogenating a polyarylether sulfone (II), reacting the product with a metal and reacting the product with an electrophilic 5-membered heterocyclic compound (III) having at least one ring nitrogen atom, provided that (III) has a carbon-bonded leaving group when (III) has only one ring nitrogen atom. Production of a heterocycle-substituted polyarylether sulfone of formula (I) comprises halogenating a polyarylether sulfone of formula (II), reacting the product with a metal and reacting the product with an electrophilic 5-membered heterocyclic compound (III) having at least one ring nitrogen atom, provided that (III) has a carbon-bonded leaving group when (III) has only one ring nitrogen atom: [Image] n : an integer, preferably 10-150; R1a 5-membered heterocycle having at least one ring N atom, provided that ring atom 1 is a C atom when there is only one ring N atom. An independent claim is also included for (I) produced as above.