Process for the electrochemical synthesis of carboxylic acids

Details Process for the electrochemical synthesis of carboxylic acids Process for the electrochemical synthesis of carboxylic acids

1988-01-07

1989-04-25

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

204 73R, 204 75, 204 78, C25B 300

Patent

active

048245321

ABSTRACT:
The invention relates to a process for the electrosynthesis of carboxylic acids of general formula R-COOH in which R is an organic radical by the electrochemical reduction, in the presence of carbon dioxide, of organic compounds corresponding to the general formula R--Y in which R is the above-mentioned organic radical and Y is a hetero atom-containing radical, the hetero atom of the radical Y, chosen from the group consisting of oxygen, nitrogen, sulphur andphosphorus, being directly linked to a carbon atom of the radical R by a single covalent linkage. When the hetero atom is nitrogen or phosphorus, the radical Y is an ammonium or phosphonium radical respectively.
The anode, which is consumed during the electrosynthesis, is made of a metal chosen from the group consisting of reducing metals and their alloys, preferably made of magnesium, aluminium or zinc.
This process without catalyst is very simple to perform and enables a cell with a single compartment to be employed.
The carboxylic acids are commonly employed in the chemical industry, especially as intermediates for the synthesis of pharmaceutical products or of products used in plant protection.

REFERENCES:
patent: 4028201 (1977-06-01), Tyssee
patent: 4072583 (1978-02-01), Hallcher et al.
patent: 4708780 (1987-11-01), Silvestri et al.
J. Org. Chem., vol. 37, No. 12, pp. 1951-1960 (1972), Braqizer et al., Retion of Organic Halides in the Presence of Electrophiles.

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