JPS6468357A - Production of chloro-2-pyridinol - Google Patents
Production of chloro-2-pyridinolInfo
- Publication number
- JPS6468357A JPS6468357A JP22533687A JP22533687A JPS6468357A JP S6468357 A JPS6468357 A JP S6468357A JP 22533687 A JP22533687 A JP 22533687A JP 22533687 A JP22533687 A JP 22533687A JP S6468357 A JPS6468357 A JP S6468357A
- Authority
- JP
- Japan
- Prior art keywords
- alkali
- solution
- acid
- active carbon
- amount
- 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.)
- Granted
Links
- XTYNIPUFKBBALX-UHFFFAOYSA-N 3-chloro-1h-pyridin-2-one Chemical compound OC1=NC=CC=C1Cl XTYNIPUFKBBALX-UHFFFAOYSA-N 0.000 title 1
- 239000003513 alkali Substances 0.000 abstract 4
- 239000000243 solution Substances 0.000 abstract 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 abstract 3
- 239000002253 acid Substances 0.000 abstract 3
- 229910052799 carbon Inorganic materials 0.000 abstract 3
- 150000001875 compounds Chemical class 0.000 abstract 3
- 238000001914 filtration Methods 0.000 abstract 3
- FNRMMDCDHWCQTH-UHFFFAOYSA-N 2-chloropyridine;3-chloropyridine;4-chloropyridine Chemical compound ClC1=CC=NC=C1.ClC1=CC=CN=C1.ClC1=CC=CC=N1 FNRMMDCDHWCQTH-UHFFFAOYSA-N 0.000 abstract 2
- 239000007864 aqueous solution Substances 0.000 abstract 2
- 239000007795 chemical reaction product Substances 0.000 abstract 1
- 238000004040 coloring Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 230000003301 hydrolyzing effect Effects 0.000 abstract 1
- 239000002917 insecticide Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
Landscapes
- Pyridine Compounds (AREA)
Abstract
PURPOSE:To improve purity without coloring in obtaining the titled compound useful as an intermediate for insecticides by heating and hydrolyzing chloropyridine in an alkali aqueous solution and adding an acid, adding the acid to adjust pH to a specific value, treating with active carbon and readjusting pH to a given value. CONSTITUTION:Chloropyridine shown by the formula is heated in an aqueous solution of an alkali such as potassium hydroxide and hydrolyzed. Then the hydrolyzed solution is adjusted to pH <7 with an acid. Then the solution is treated with active carbon (the amount of the active carbon added is preferably at least 0.05wt.% based on the amount of the reaction solution), successively readjusted to pH >=7, preferably pH >=8 with an alkali and filtered while being hot to give the aimed compound. The hot filtration is carried out under normal pressure at >=75 deg.C, preferably >=85 deg.C. Dissolved state of the reaction product is required in the hot filtration so that amount of water is selected depending upon the alkali used. The aimed compound is precipitated at pH 2-4 while maintaining the reaction solution at >=80 deg.C after the hot filtration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22533687A JPH0822852B2 (en) | 1987-09-10 | 1987-09-10 | Method for producing chloro-2-pyridinol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22533687A JPH0822852B2 (en) | 1987-09-10 | 1987-09-10 | Method for producing chloro-2-pyridinol |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6468357A true JPS6468357A (en) | 1989-03-14 |
| JPH0822852B2 JPH0822852B2 (en) | 1996-03-06 |
Family
ID=16827752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22533687A Expired - Lifetime JPH0822852B2 (en) | 1987-09-10 | 1987-09-10 | Method for producing chloro-2-pyridinol |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0822852B2 (en) |
-
1987
- 1987-09-10 JP JP22533687A patent/JPH0822852B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0822852B2 (en) | 1996-03-06 |
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