JPS57145880A - Production of 3,3',4-tri-o-methylellagic acid - Google Patents
Production of 3,3',4-tri-o-methylellagic acidInfo
- Publication number
- JPS57145880A JPS57145880A JP3129281A JP3129281A JPS57145880A JP S57145880 A JPS57145880 A JP S57145880A JP 3129281 A JP3129281 A JP 3129281A JP 3129281 A JP3129281 A JP 3129281A JP S57145880 A JPS57145880 A JP S57145880A
- Authority
- JP
- Japan
- Prior art keywords
- compound
- give
- formula
- methylated
- product
- 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
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
PURPOSE: One of two acetyl groups in 4,4'-di-O-acetyl-3,3'-di-O-methylellagic acid is specifically removed under specific conditions; the product is methylated and hydrolyzed to give the titled compound used as a styptic in high yield.
CONSTITUTION: The compound of formula IV is subjected to specific removal of one of the acetyl groups in the presence of dimethylformamide and aniline to give the compound of formula V. The product is methylated with a reagent such as dimethyl sulfate, diazomethane or methyl iodide to give the compound of formula III. Further, it is hydrolzyed with an alkali to give the compound of formulaI. The process of the present invention gives the compound of formulaIin a yield as high as 5 times that when it is produced by the conventional one, i.e., using the compound of formula II as a starting material to effect methylation and hydrolysis, thus being industrially advantageous.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3129281A JPS57145880A (en) | 1981-03-06 | 1981-03-06 | Production of 3,3',4-tri-o-methylellagic acid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3129281A JPS57145880A (en) | 1981-03-06 | 1981-03-06 | Production of 3,3',4-tri-o-methylellagic acid |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57145880A true JPS57145880A (en) | 1982-09-09 |
JPH0160030B2 JPH0160030B2 (en) | 1989-12-20 |
Family
ID=12327226
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3129281A Granted JPS57145880A (en) | 1981-03-06 | 1981-03-06 | Production of 3,3',4-tri-o-methylellagic acid |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57145880A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5073545A (en) * | 1987-06-09 | 1991-12-17 | Lion Corporation | Agent containing an ellagic acid series compound for external application and use thereof |
-
1981
- 1981-03-06 JP JP3129281A patent/JPS57145880A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5073545A (en) * | 1987-06-09 | 1991-12-17 | Lion Corporation | Agent containing an ellagic acid series compound for external application and use thereof |
Also Published As
Publication number | Publication date |
---|---|
JPH0160030B2 (en) | 1989-12-20 |
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