Process for the preparation of a hydroxyphenylcarboxylate

Details Process for the preparation of a hydroxyphenylcarboxylate Process for the preparation of a hydroxyphenylcarboxylate

1984-12-12

1986-10-21

Killos, Paul J.

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

Organic compounds

Carboxylic acid esters

560 75, C07C 6988

Patent

active

046187006

ABSTRACT:
Pentaerythrityl tetrakis-[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] is prepared by transesterifying a lower alkyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate with pentaerythritol in the presence of a basic catalyst, without addition of an inert solvent and in a 15 to 50% excess of lower alkyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate over the stoichiometric amount of 4 moles per 1 mole of pentaerythritol.
An extremely good yield of pure crystalline product is obtained by the process of the invention.

REFERENCES:
patent: 3644482 (1972-02-01), Dexter

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