Process for the manufacture of alkali salts of 3,5-disubstituted

Details Process for the manufacture of alkali salts of 3,5-disubstituted Process for the manufacture of alkali salts of 3,5-disubstituted

1975-02-24

1977-07-05

Morgenstern, Norman

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260520A, 260473R, 260439R, C07C 5115

Patent

active

040340066

ABSTRACT:
A new process for the preparation of alkalimetal salts of 3,5-substituted 4-hydroxybenzoic acids and the free acids thereof, which comprises reacting a 2,6-disubstituted phenol in a mixture of water and a dipolar aprotic solvent with an alkalimetal hydroxide, removing the water, treating the reaction mixture with carbon dioxide and in case of preparing the free acids treating the reaction mixture with a mineral acid.
The alkalimetal salts of 4-hydroxybenzoic acids and the free acids thereof are compounds which can be used as intermediates for stabilizers.

REFERENCES:
patent: 2807643 (1957-09-01), Hartley
patent: 3532745 (1970-10-01), Hirao
patent: 3825593 (1974-07-01), Meek

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