JPS5762261A - Preparation of 1,3-dimethyl-4-benzoyl-5-hydroxypyrazole compound - Google Patents

Preparation of 1,3-dimethyl-4-benzoyl-5-hydroxypyrazole compound

Info

Publication number
JPS5762261A
JPS5762261A JP13805280A JP13805280A JPS5762261A JP S5762261 A JPS5762261 A JP S5762261A JP 13805280 A JP13805280 A JP 13805280A JP 13805280 A JP13805280 A JP 13805280A JP S5762261 A JPS5762261 A JP S5762261A
Authority
JP
Japan
Prior art keywords
compound
methyl
benzoyl
hydrazine
dimethyl
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
JP13805280A
Other languages
Japanese (ja)
Inventor
Ryuzo Nishiyama
Isao Yokomichi
Takahiro Haga
Tetsuji Nishikawa
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 JP13805280A priority Critical patent/JPS5762261A/en
Publication of JPS5762261A publication Critical patent/JPS5762261A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To prepare the titled compound, easily, by reacting a 1-methyl-1-alkoxy- carbonyl hydrazine compound with a 1-benzoylacetone compound, and then cyclizing the reaction product in the presence of a basic substance.
CONSTITUTION: A 1-methyl-1-alkoxycarbonyl hydrazine compound is made to react with a 1-benzyl-acetone compound in the presence of a catalyst such as hydrochloric acid, formic acid, etc. to obtain a 1-methyl-1-alkoxycarbonyl-2-(2-benzoyl) isopropyl- idene hydrazine compound, which is cyclized in the presence of a basic substance (e.g. sodium ethylate) to afford the objective compound. The 1-methyl-1-alkoxy- carbonyl hydrazine used as a raw material can be prepared, e.g., by condensing methylhydrazine with a dialkyl carbonate.
COPYRIGHT: (C)1982,JPO&Japio
JP13805280A 1980-10-02 1980-10-02 Preparation of 1,3-dimethyl-4-benzoyl-5-hydroxypyrazole compound Pending JPS5762261A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13805280A JPS5762261A (en) 1980-10-02 1980-10-02 Preparation of 1,3-dimethyl-4-benzoyl-5-hydroxypyrazole compound

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13805280A JPS5762261A (en) 1980-10-02 1980-10-02 Preparation of 1,3-dimethyl-4-benzoyl-5-hydroxypyrazole compound

Publications (1)

Publication Number Publication Date
JPS5762261A true JPS5762261A (en) 1982-04-15

Family

ID=15212859

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13805280A Pending JPS5762261A (en) 1980-10-02 1980-10-02 Preparation of 1,3-dimethyl-4-benzoyl-5-hydroxypyrazole compound

Country Status (1)

Country Link
JP (1) JPS5762261A (en)

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