Process for obtaining aryl esters by O-dealkylation and applicat

Details Process for obtaining aryl esters by O-dealkylation and applicat Process for obtaining aryl esters by O-dealkylation and applicat

1992-12-10

1994-02-01

Prescott, Arthur C.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

C07C 6976

Patent

active

052833585

ABSTRACT:
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).sub.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 C.sub.6 to C.sub.14 aromatic radical, a coumarinyl group or a group of a number of phenyl radicals.
This process allows also the obtention of aromatic polyester.

REFERENCES:
patent: 4835304 (1989-05-01), Williams

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