JPS5681580A - Preparation of chromone-3-carboxylic acid - Google Patents
Preparation of chromone-3-carboxylic acidInfo
- Publication number
- JPS5681580A JPS5681580A JP15746879A JP15746879A JPS5681580A JP S5681580 A JPS5681580 A JP S5681580A JP 15746879 A JP15746879 A JP 15746879A JP 15746879 A JP15746879 A JP 15746879A JP S5681580 A JPS5681580 A JP S5681580A
- Authority
- JP
- Japan
- Prior art keywords
- chromone
- mclo
- carboxylic acid
- formula
- water
- 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
Landscapes
- Pyrane Compounds (AREA)
Abstract
PURPOSE: To obtain the titled substance which is a synthetic raw material for an antiallergic and an antimicrobial agents in high yeild industrially and advantageously, by oxidizing chromone-3-carboxaldehyde with MClO2 which is readily subjected to waste liquor disposal as an oxidizing agent in the presence of a chlorine capturing agent.
CONSTITUTION: A compound of formula I which may have a substituent is oxidized with MClO2 (M is alkali metal) in the presence of a chlorine capturing agent, e.g. sulfamic acid or resorcinol, to give chromone-3-carboxylic acid of formula II. Sodium chlorite or potassium chlorite is used as the MClO2. The reaction is carried out usually at -10W40°C, preferably at 10W20°C, and a water-insoluble and water- soluble solvent, e.g. dichloromethane or acetone, is used. The waste liquor can be treated by the conventional methods, e.g. actived sludge method, without causing pollution due to no chromic acid oxidizing agent.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15746879A JPS6056154B2 (en) | 1979-12-06 | 1979-12-06 | Method for producing chromone-3-carboxylic acid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15746879A JPS6056154B2 (en) | 1979-12-06 | 1979-12-06 | Method for producing chromone-3-carboxylic acid |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5681580A true JPS5681580A (en) | 1981-07-03 |
JPS6056154B2 JPS6056154B2 (en) | 1985-12-09 |
Family
ID=15650323
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15746879A Expired JPS6056154B2 (en) | 1979-12-06 | 1979-12-06 | Method for producing chromone-3-carboxylic acid |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6056154B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05111546A (en) * | 1991-06-06 | 1993-05-07 | S T Chem Co Ltd | Halogen trapping agent |
-
1979
- 1979-12-06 JP JP15746879A patent/JPS6056154B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05111546A (en) * | 1991-06-06 | 1993-05-07 | S T Chem Co Ltd | Halogen trapping agent |
Also Published As
Publication number | Publication date |
---|---|
JPS6056154B2 (en) | 1985-12-09 |
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