JPS5750967A - Preparation of 1-alkyl-3-methylpyrazole compound - Google Patents
Preparation of 1-alkyl-3-methylpyrazole compoundInfo
- Publication number
- JPS5750967A JPS5750967A JP12650180A JP12650180A JPS5750967A JP S5750967 A JPS5750967 A JP S5750967A JP 12650180 A JP12650180 A JP 12650180A JP 12650180 A JP12650180 A JP 12650180A JP S5750967 A JPS5750967 A JP S5750967A
- Authority
- JP
- Japan
- Prior art keywords
- alkyl
- compound
- alkylating agent
- formula
- preparation
- 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.)
- Pending
Links
Abstract
PURPOSE: To prepare the titled compound, easily, in high yield, by reacting a 3- methyl-pyrazole compound derived from hydrazine with an alkylating agent such as easily available trimethyl phosphate, etc.
CONSTITUTION: A 1-alkylmethylpyrazole compound of formula III (R is alkyl), e.g. 1,3-dimethyl-5-hydroxypyrazole, is prepared by reacting a 3-methylpyrazole compound of formula I [X is H or group of formula II (Y1 and Y2 are H, halogen, nitro, or trifluoromethyl)], e.g. 3-methyl-5-hydroxypyrazole, with an alkylating agent selected from trialkyl phosphate and alkyl p-toluenesulfonate. The reaction temperature is pref. 120W170°C when the alkylating agent is trialkyl phosphate, and 70W120°C when it is alkyl p-toluenesulfonate.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12650180A JPS5750967A (en) | 1980-09-11 | 1980-09-11 | Preparation of 1-alkyl-3-methylpyrazole compound |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12650180A JPS5750967A (en) | 1980-09-11 | 1980-09-11 | Preparation of 1-alkyl-3-methylpyrazole compound |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5750967A true JPS5750967A (en) | 1982-03-25 |
Family
ID=14936764
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12650180A Pending JPS5750967A (en) | 1980-09-11 | 1980-09-11 | Preparation of 1-alkyl-3-methylpyrazole compound |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5750967A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57176963A (en) * | 1981-04-25 | 1982-10-30 | Otsuka Chem Co Ltd | Preparation of 1,3-di-substituted-5-pyrazolone derivative |
-
1980
- 1980-09-11 JP JP12650180A patent/JPS5750967A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57176963A (en) * | 1981-04-25 | 1982-10-30 | Otsuka Chem Co Ltd | Preparation of 1,3-di-substituted-5-pyrazolone derivative |
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