JPS5748969A - Preparation of 1-alkyl-3-methylpyrazole type compound - Google Patents

Preparation of 1-alkyl-3-methylpyrazole type compound

Info

Publication number
JPS5748969A
JPS5748969A JP12519280A JP12519280A JPS5748969A JP S5748969 A JPS5748969 A JP S5748969A JP 12519280 A JP12519280 A JP 12519280A JP 12519280 A JP12519280 A JP 12519280A JP S5748969 A JPS5748969 A JP S5748969A
Authority
JP
Japan
Prior art keywords
methylpyrazole
type compound
alkyl
formula
halogen
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
Application number
JP12519280A
Other languages
Japanese (ja)
Inventor
Isao Yokomichi
Takahiro Haga
Tetsuji Nishikawa
Toshio Nakajima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ishihara Sangyo Kaisha Ltd
Original Assignee
Ishihara Sangyo Kaisha Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ishihara Sangyo Kaisha Ltd filed Critical Ishihara Sangyo Kaisha Ltd
Priority to JP12519280A priority Critical patent/JPS5748969A/en
Publication of JPS5748969A publication Critical patent/JPS5748969A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To obtain a 1-alkyl-3-methylpyrazole type compound under mild conditions in high yield, by reacting a 3-methylpyrazole type compound with an alkanol in the presence of a halogen as well as an acid.
CONSTITUTION: A 3-methylpyrazole type compound shown by the formula I [X is H, a group shown by the formula II (Y1 and Y2 are H, halogen, nitro, or trifluoromethyl)] is reacted with an alkanol, e.g., methyl alcohol, etc., to give a 1-alkyl- 3-methylpyrazole type compound shown by the formula III (R is alkyl). In the reaction, a halogen (e.g., iodine, bromine, etc.) is present besides a mineral acid or an organic sulfonic acid. In case of the compound shown by the formula I wherein X=H, the yield is ≥85%. Particularly complicate reaction operations, reaction devices, etc. are not required.
COPYRIGHT: (C)1982,JPO&Japio
JP12519280A 1980-09-09 1980-09-09 Preparation of 1-alkyl-3-methylpyrazole type compound Pending JPS5748969A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12519280A JPS5748969A (en) 1980-09-09 1980-09-09 Preparation of 1-alkyl-3-methylpyrazole type compound

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12519280A JPS5748969A (en) 1980-09-09 1980-09-09 Preparation of 1-alkyl-3-methylpyrazole type compound

Publications (1)

Publication Number Publication Date
JPS5748969A true JPS5748969A (en) 1982-03-20

Family

ID=14904188

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12519280A Pending JPS5748969A (en) 1980-09-09 1980-09-09 Preparation of 1-alkyl-3-methylpyrazole type compound

Country Status (1)

Country Link
JP (1) JPS5748969A (en)

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