JPS55365A - Preparation of pyrazole derivative - Google Patents
Preparation of pyrazole derivativeInfo
- Publication number
- JPS55365A JPS55365A JP4167279A JP4167279A JPS55365A JP S55365 A JPS55365 A JP S55365A JP 4167279 A JP4167279 A JP 4167279A JP 4167279 A JP4167279 A JP 4167279A JP S55365 A JPS55365 A JP S55365A
- Authority
- JP
- Japan
- Prior art keywords
- formula
- compound
- preparation
- temperature
- refluxing
- 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
Abstract
NEW MATERIAL:4-Benzoylpyrazole derivatives of formula I (R1, R2 are 1W3C straight-chain or branched alkyl) or their salts.
EXAMPLE: 1,3-Dimethyl-4-(2,4-dichlorobenzoyl)-5-hydroxypyrazole.
USE: Herbicide, whitening weeds to death.
PREPARATION: An acyl halide of formula III (X is halogen) is made to act on a compound of formula II in the presence of a catalyst, such as a hydroxide of alkaline earth metal, especially calcium hydroxide, to give the objective compound of formula I. Further, when necessary, the resulting compound is converted to the corresponding salt of an alkali metal, ammonium, or mineral acid. Preferably the reaction is conducted by using 1 mole of the compound of formula II and 1W2 moles of the acyl halide and keeping the temperature at room temperature to the refluxing, preferably the refluxing temperature of the solvent for 1W10 hr.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54041672A JPS5827791B2 (en) | 1979-04-06 | 1979-04-06 | Production method of pyrazole derivatives |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54041672A JPS5827791B2 (en) | 1979-04-06 | 1979-04-06 | Production method of pyrazole derivatives |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3493974A Division JPS5436648B2 (en) | 1974-03-28 | 1974-03-28 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55365A true JPS55365A (en) | 1980-01-05 |
JPS5827791B2 JPS5827791B2 (en) | 1983-06-11 |
Family
ID=12614884
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54041672A Expired JPS5827791B2 (en) | 1979-04-06 | 1979-04-06 | Production method of pyrazole derivatives |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5827791B2 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5029477A (en) * | 1973-03-09 | 1975-03-25 |
-
1979
- 1979-04-06 JP JP54041672A patent/JPS5827791B2/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5029477A (en) * | 1973-03-09 | 1975-03-25 |
Also Published As
Publication number | Publication date |
---|---|
JPS5827791B2 (en) | 1983-06-11 |
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