JPS5626832A - Preparation of cyclopentenolone - Google Patents
Preparation of cyclopentenoloneInfo
- Publication number
- JPS5626832A JPS5626832A JP10365579A JP10365579A JPS5626832A JP S5626832 A JPS5626832 A JP S5626832A JP 10365579 A JP10365579 A JP 10365579A JP 10365579 A JP10365579 A JP 10365579A JP S5626832 A JPS5626832 A JP S5626832A
- Authority
- JP
- Japan
- Prior art keywords
- water
- compound
- formula
- hydrochloric
- cyclopentenone
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
Landscapes
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
PURPOSE: To obtain the titled compound for an intermediate of agricultural chemicals and medicines, by the reaction of a compound such as 4-hydroxy-4-methyl- 5-alkyl-2-cyclopentenone in water or a mixed solvent of water with an insoluble organic solvent in the presence of hydrochloric or nitric acid.
CONSTITUTION: A cyclopentenolone of formula II (e.g. 2-allyl-3-methyl-4-hydroxy-2- cyclopentenone) is obtained easily and in high yield by the rection of a compound of formula I (R is 1-5C alkyl, alkenyl or alkynyl) in water or a mixed sovlent of water with an inert organic solvent (suitably tetrahydrofuran or dioxane) in the presence of hydrochloric or nitric acid. The concentration of the hydrochloric acid used in suitably in the range of 0.2W3 normal and the molar amount is in the range of 0.4W16 times that of the compound of formula I.
USE: An alcohol constituent in Allethrin which is a useful agricultural chemical (R=allyl).
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10365579A JPS5626832A (en) | 1979-08-14 | 1979-08-14 | Preparation of cyclopentenolone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10365579A JPS5626832A (en) | 1979-08-14 | 1979-08-14 | Preparation of cyclopentenolone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5626832A true JPS5626832A (en) | 1981-03-16 |
| JPS6152811B2 JPS6152811B2 (en) | 1986-11-14 |
Family
ID=14359788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10365579A Granted JPS5626832A (en) | 1979-08-14 | 1979-08-14 | Preparation of cyclopentenolone |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5626832A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58111690A (en) * | 1981-12-25 | 1983-07-02 | Sumitomo Chem Co Ltd | L(-)-2-allyl-3-hydroxy-3-methyl-4-cyclopentenone and its preparation |
-
1979
- 1979-08-14 JP JP10365579A patent/JPS5626832A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58111690A (en) * | 1981-12-25 | 1983-07-02 | Sumitomo Chem Co Ltd | L(-)-2-allyl-3-hydroxy-3-methyl-4-cyclopentenone and its preparation |
| JPH0428358B2 (en) * | 1981-12-25 | 1992-05-14 | Sumitomo Chemical Co |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6152811B2 (en) | 1986-11-14 |
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