JPS5484559A - Preparation of beta-hydroxynaphthamide - Google Patents
Preparation of beta-hydroxynaphthamideInfo
- Publication number
- JPS5484559A JPS5484559A JP15273577A JP15273577A JPS5484559A JP S5484559 A JPS5484559 A JP S5484559A JP 15273577 A JP15273577 A JP 15273577A JP 15273577 A JP15273577 A JP 15273577A JP S5484559 A JPS5484559 A JP S5484559A
- Authority
- JP
- Japan
- Prior art keywords
- slurry
- acid
- urea
- alkali
- compound
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
PURPOSE: To obtain the title compound useful as an intermediate for pigments in a high yield, by dissolving a slurry of a reaction mixture between β-hydroxy- naphthoic acid and urea in water with an alkali, followed by agitating the filtrate of the solution after the addition of an acid.
CONSTITUTION: β-Hydrozynaphthoic acid is reacted with an excess of urea at a temperature above the melting point of the urea to give a reaction mixture, which is, in a molten state, mixed with water to form a slurry at 20°C or below. The slurry is then mixed with an equimolar amount or more based on the objective compound contained in the solid content of the slurry of caustic alkali, e.g. caustic soda, etc. to dissolve the solid content. The mixture is then filtered, and the resulting aqueous solution of alkali is incorporated with an acid, e.g. hydrochloric acid, etc. at pH≥10, to deposit crystals of the objective compound. The slurry thus obtained is heated to 30W60°C, agitated and filtered to afford the desired compound.
EFFECT: The compound of ≥95% purity can be obtained in a high yield.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15273577A JPS5484559A (en) | 1977-12-19 | 1977-12-19 | Preparation of beta-hydroxynaphthamide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15273577A JPS5484559A (en) | 1977-12-19 | 1977-12-19 | Preparation of beta-hydroxynaphthamide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5484559A true JPS5484559A (en) | 1979-07-05 |
Family
ID=15547006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15273577A Pending JPS5484559A (en) | 1977-12-19 | 1977-12-19 | Preparation of beta-hydroxynaphthamide |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5484559A (en) |
-
1977
- 1977-12-19 JP JP15273577A patent/JPS5484559A/en active Pending
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