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US 3,944,565 AGranted
Process for preparing alkali metal salts of carbazole
AssigneeTakasago Perfumery Co., Ltd.
InventorsHiroshi Otsuki, Kenzo Sakuma, Isamu Matsuzawa
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Abstract
Alkali metal salts of carbazole are prepared by heating carbazole and alkali metal hydroxides with stirring in an organic solvent which forms an azeotrope with water, and removing the resulting water as an azeotrope from the reaction system. The resulting alkali metal salts of carbazole are useful as a material for the preparation of vinyl carbazole for use in electrophotography. The reaction is promoted particularly by the presence of a small amount of water in the reaction system prior to heating.
Claims8
A process for preparing an alkali metal salt of carbazole, which comprises heating
- a. carbazole,
- b. an alkali metal hydroxide, and
- c. water, wherein the molar ratio of water to said alkali metal hydroxide is about 0.3:1 to 0.35:1 and wherein said water is added to the reaction system prior to said heating,
- with stirring in
- d. an organic solvent which forms an azeotrope with water, and removing the water formed in the reaction as an azeotrope from the reaction system.
2 more elements
Dependencies are inferred from the claim text.