Photochemical method for preparing 4-keto-9-methylphenazine

Details Photochemical method for preparing 4-keto-9-methylphenazine Photochemical method for preparing 4-keto-9-methylphenazine

1985-05-08

1986-09-09

Williams, Howard S.

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

B01J 1912

Patent

active

046107673

ABSTRACT:
A method for preparing 4-keto-9-methylphenazine, which comprises methylation of phenazine with dimethylsulphate, followed by keeping the resulting reaction mixture at a temperature within the range of from 0.degree. to 10.degree. C. and carrying out a photo-chemical oxidation of the resulting 9-methylphenazinium methylsulphate by UV-irradiation for not longer than 3 hours, bringing the pH of the reaction mixture to 8.5-9.5, a repeated irradiation thereof for additional 3-5 hours, and isolation of the desired product.

REFERENCES:
patent: 3196097 (1965-07-01), Ide et al.

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