Title:
３，５－ジ－ターシャリーブチルサリチル酸の製造方法
Document Type and Number:
Japanese Patent JP7469360
Kind Code:
B2
Abstract:
The method for producing 3,5-di-tertiary-butylsalicylic acid according to one aspect of the present invention comprises: a first step for reacting an alkali metal hydroxide with 2,4-di-tertiary-butylphenol using 4-methyltetrahydropyran as a reaction solvent to produce a salt of the 2,4-di-tertiary-butylphenol (wherein X represents an alkali metal); a second step for injecting carbon dioxide into a container that is heated and has the reaction solvent and the alkali salt of the 2,4-di-tertiary-butylphenol enclosed therein to produce a salt of 3,5-di-tertiary-butylsalicylic acid, subsequent to the first step; and a third step for performing a pH value adjustment process for adjusting the pH value to a value of less than 4 to produce a solid matter containing the 3,5-di-tertiary-butylsalicylic acid, subsequent to the second step.
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Inventors:
River saki Ryoichi
Takamitsu Togawa
Takamitsu Togawa
Application Number:
JP2022063603A
Publication Date:
April 16, 2024
Filing Date:
April 06, 2022
Export Citation:
Assignee:
Osaka Shinyaku Co., Ltd.
International Classes:
C07C51/15; C07C65/05
Domestic Patent References:
| JP6261949A | ||||
| JP63165341A | ||||
| JP390047A | ||||
| JP1087562A | ||||
| JP10231271A |
Foreign References:
| CN104086411A | ||||
| CN112020507A |
Attorney, Agent or Firm:
Hiroaki Kohno
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