Electrochemical synthesis of 2-methyl-5-pyrazinoic acid

Details Electrochemical synthesis of 2-methyl-5-pyrazinoic acid Electrochemical synthesis of 2-methyl-5-pyrazinoic acid

1991-05-29

1992-02-25

Niebling, John

Chemistry: electrical and wave energy

Processes and products

C25B 302

Patent

active

050910663

ABSTRACT:
There is disclosed a process for the preparation of 2-methyl-5-pyrazinoic acid consisting of electrochemically oxidizing a compound having formula: ##STR1## wherein X is --OH, Cl, Br, --O--CO--R, --O--SO.sub.2 --R, in which R is a C.sub.1 -C.sub.5 alkyl radical, optionally substituted with F or Cl, or it is a C.sub.6 -C.sub.12 aryl radical, in an aqueous alkaline medium, at a temperature ranging from 20.degree. C. to 90.degree. C., using anodes coated with nickel oxide-hydroxide.

REFERENCES:
patent: 4488944 (1984-12-01), Stutts et al.
patent: 4496440 (1985-01-01), Campbell et al.
patent: 4640750 (1987-02-01), Blickle
Kaulen et al., "Oxidation of Primary Alcohols to Carboxylic Acids at Nickel Hydroxide Electrode", Synthesis, pp. 513-516, Jul. 1979.
Barlin, G. B., "The Pyrazines", John Wiley & Sons, New York, 1982.

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