JPS55108856A - Preparation of 1-alkyl-3-methyl-5-pyrazolone - Google Patents
Preparation of 1-alkyl-3-methyl-5-pyrazoloneInfo
- Publication number
- JPS55108856A JPS55108856A JP1499779A JP1499779A JPS55108856A JP S55108856 A JPS55108856 A JP S55108856A JP 1499779 A JP1499779 A JP 1499779A JP 1499779 A JP1499779 A JP 1499779A JP S55108856 A JPS55108856 A JP S55108856A
- Authority
- JP
- Japan
- Prior art keywords
- methyl
- alcohol
- formula
- alkyl
- phrazolone
- 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 simplfy the production process, to improve the yield and purity, and to obtain the title compound useful as an intermediate for the synthesis of agricultural chemicals, medicines, and dyes, by reacting 3-methyl-5-phrazolone with an alcohol in the presence of a mineral acid as a catalyst.
CONSTITUTION: One mole of 3-methyl-5-phrazolone of formula I is reacted with an alcohol of the formula R-OH (R is alkyl or cycloalkyl group) in the presence of 0.1mol or more of a mineral acid, preferably sulfuric acid, or p-toluenesulfonic acid with or without a solvent at 80W300° under atmospheric pressure to give the desired compound of formula II. The alcohol is preferably used in a stoichiometric amount or more due to its solvent action.
EFFECT: Inexpensive and available raw materials permit a low production cost.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1499779A JPS55108856A (en) | 1979-02-14 | 1979-02-14 | Preparation of 1-alkyl-3-methyl-5-pyrazolone |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1499779A JPS55108856A (en) | 1979-02-14 | 1979-02-14 | Preparation of 1-alkyl-3-methyl-5-pyrazolone |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55108856A true JPS55108856A (en) | 1980-08-21 |
Family
ID=11876560
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1499779A Pending JPS55108856A (en) | 1979-02-14 | 1979-02-14 | Preparation of 1-alkyl-3-methyl-5-pyrazolone |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55108856A (en) |
-
1979
- 1979-02-14 JP JP1499779A patent/JPS55108856A/en active Pending
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