Process for producing 2-methyl-1,4-naphthoquinone
AssigneeEisai Chemical Co., Ltd.
InventorsAtsushi Shinnaka, Yukio Narabu
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Abstract
An improved process for producing 2-methyl-1,4-naphthoquinone with a high yield comprising reaction of a 1-lower-alkoxy-2-methyl naphthalene with hydrogen peroxide in the presence of a hexacyanoferric acid or a salt thereof as catalyst. This process does not employ hazardous chromium compounds unlike conventional methods.
Claims6
A process for producing 2-methyl-1,4-naphthoquinone which comprises reaction of a 1-lower-alkoxy-2-methyl-naphthalene with hydrogen peroxide in a solvent at a temperature of 20.degree.-100.degree. in the presence of a hexacyanoferric acid or its alkali metal or ammonium salt thereof as catalyst.
Dependencies are inferred from the claim text.