Process for obtaining aryl esters by O-dealkylation and applications

摘要

Process for obtaining aryl esters by O-dealkylation of an alkyl aryl ether with an acyl halide in the presence of a catalyst chosen from hexaalkylguanidinium salts and tetraalkylphosphonium salts. The alkyl aryl ether corresponds preferentially to the formula Ar(OR)n in which R denotes an alkyl group, in particular a methyl group, n is an integer from 1 to 6 and Ar represents a C6 to C14 aromatic radical, a coumarinyl group or a group of a number of phenyl radicals. This process allows also the obtention of aromatic polyester.