Process for preparing alkyl 4,4'-(ethylenedioxy)bis-benzoates

Details Process for preparing alkyl 4,4'-(ethylenedioxy)bis-benzoates Process for preparing alkyl 4,4'-(ethylenedioxy)bis-benzoates

1975-05-07

1976-09-21

Killos, Paul J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 6976

Patent

active

039819060

ABSTRACT:
Alkyl 4,4'-(ethylenedioxy)bis-benzoates having improved properties such as anti-oxidation and anti-coloration are prepared in high yield and selectivity by, at the first step, reacting an excess alkyl p-hydroxybenzoate with a recycling alkyl p-(2-chloro-ethoxy)benzoate with heating in the presence of an alkali carbonate and an inert organic solvent until almost said alkyl p-(2-chloroethoxy)benzoate is consumed to produce an alkyl 4,4'-(ethylenedioxy)bis-benzoate and at the second step adding ethylene dichloride to the reaction system and continuing the heating to produce an alkyl p-(2-chloroethoxy)benzoate which is recycled, and separating the alkyl 4,4'-(ethylenedioxy)bis-benzoate produced.

REFERENCES:
patent: 3855274 (1974-12-01), Kato et al.

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