| 摘要 |
PURPOSE:To produce a benzene type azo compound in a high yield without using a an expensive catalyst hard to handle by electrolytically reducing a benzene type nitro compounding an alcoholic soln. of an alkali metallic hydroxide as a solvent. CONSTITUTION:An alkali metallic hydroxide such as KOH or NaOH is dissolved in an alcohol such as methanol or ethanol to 1-50% concn., and a benzene type nitro compound represented by formula I (where each of R1 and R2 is H, halogen, 1-4C alkyl, 1-4C alkoxy, phenyl, hydroxyl, acyl, amino or carboxyl), e.g., nitrobenzene, o-nitrotoluene or p-nitrotoluene is dissolved in the resulting alcoholic soln. as a solvent to 0.1-50% concn. to prepare an elec trolytic soln. This electrolytic soln. is poured into a conventional electrolytic cell having no diaphragm, electrodes of Pt, C, Ni, Pb, Cu, stainless steel or the like are placed, and electric current is supplied at 0-70 deg.C temp. of the electrolytic soln. and 1-100mA/cm<2> current density to electrolytically reduce the nitro compound. A benzene type azo compound represented by formula II (where R1 and R2 are R1 and R2 in the formula I, respectively) is deposited in a high yield without using an expensive metallic catalyst hard to handle.
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