JPS54106467A - Preparation of 2-alkyl-2,4-dihydro-5-methyl-3h-pyrazole- 3-one - Google Patents

Preparation of 2-alkyl-2,4-dihydro-5-methyl-3h-pyrazole- 3-one

Info

Publication number
JPS54106467A
JPS54106467A JP1150378A JP1150378A JPS54106467A JP S54106467 A JPS54106467 A JP S54106467A JP 1150378 A JP1150378 A JP 1150378A JP 1150378 A JP1150378 A JP 1150378A JP S54106467 A JPS54106467 A JP S54106467A
Authority
JP
Japan
Prior art keywords
alkyl
pyrazole
dihydro
methyl
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.)
Granted
Application number
JP1150378A
Other languages
Japanese (ja)
Other versions
JPS604823B2 (en
Inventor
Mitsuo Mazaki
Kiyoshi Fukui
Satoshi Matsunami
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.)
Ube Corp
Original Assignee
Ube Industries 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 Ube Industries Ltd filed Critical Ube Industries Ltd
Priority to JP1150378A priority Critical patent/JPS604823B2/en
Publication of JPS54106467A publication Critical patent/JPS54106467A/en
Publication of JPS604823B2 publication Critical patent/JPS604823B2/en
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To prepare the title compound useful as an intermediate for medicines and pesticides in one step without using troublesome operation, such as separation and removal of water produced, by reacting diketene with an alkylhydrazine.
CONSTITUTION: A solution of diketene of formula I is reacted with preferably an equimolar amount of a solution of an alkylhydrazine of formula II: (R is 1W4C alkyl group) at 0W120°C, preferably room temperature to 100°C, to give an 2- alkyl-2,4-dihydro-5-methyl-3H-pyrazole-3-one. Preferably, water, benzene, etc. inert to the compounds of formulas I, II, and III, may be used as a solvent.
COPYRIGHT: (C)1979,JPO&Japio
JP1150378A 1978-02-06 1978-02-06 Method for producing 2-alkyl-2,4-dihydro-5-methyl-3H-pyrazol-3-one Expired JPS604823B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1150378A JPS604823B2 (en) 1978-02-06 1978-02-06 Method for producing 2-alkyl-2,4-dihydro-5-methyl-3H-pyrazol-3-one

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1150378A JPS604823B2 (en) 1978-02-06 1978-02-06 Method for producing 2-alkyl-2,4-dihydro-5-methyl-3H-pyrazol-3-one

Publications (2)

Publication Number Publication Date
JPS54106467A true JPS54106467A (en) 1979-08-21
JPS604823B2 JPS604823B2 (en) 1985-02-06

Family

ID=11779816

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1150378A Expired JPS604823B2 (en) 1978-02-06 1978-02-06 Method for producing 2-alkyl-2,4-dihydro-5-methyl-3H-pyrazol-3-one

Country Status (1)

Country Link
JP (1) JPS604823B2 (en)

Also Published As

Publication number Publication date
JPS604823B2 (en) 1985-02-06

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