Title:
PRODUCTION OF 1, 4-NAPHTHOQUINONE DERIVATIVE
Document Type and Number:
Japanese Patent JPS57134581
Kind Code:
A
Abstract:
PURPOSE:To avert pollution problems with simple operation and to produce 1, 4-naphthoquinone derivatives efficiently by electrolytically oxidizing 2-methyl- 5, 8-dihydro-1, 4-naphthohydroquinone in an org. solvent contg. supporting electrolyte. CONSTITUTION:The 2-methyl-5, 8-dihydro-1, 4-naphthoquinone expressed by the formula II is electrolytically oxidized in the presence of 0.1-30wt% supporting electrolyte in an org. solvent. The electrolytic oxidation of this case is accomplished by maintaining current density at 100-0.5mA/cm<2> and -10-80 deg.C temps. Further, for example, perchloric acid, alkali metallic salt of perchloric acid, etc. are more preferably used for the above-mentioned supporting electrolyte. Alcohols such as methanols, carboxylic acids such as formic acids, etc. are used as the org. solvent. By this electrolytic oxidation, the 2-methyl-1, 4-naphthoquinone or 2-methyl-5, 8-dihydronaphthoquinone is obtained efficiently, post-treatments are easy, and there is no need for treatment of waste.
Inventors:
TORII SHIGERU
TANAKA HIDEO
NAKANE SHIYOUJI
TANAKA HIDEO
NAKANE SHIYOUJI
Application Number:
JP1903481A
Publication Date:
August 19, 1982
Filing Date:
February 13, 1981
Export Citation:
Assignee:
TORII SHIGERU
International Classes:
C25B3/23; (IPC1-7): C25B3/02