JPS5629575A - Preparation of pyrazole derivative - Google Patents

Preparation of pyrazole derivative

Info

Publication number
JPS5629575A
JPS5629575A JP10638179A JP10638179A JPS5629575A JP S5629575 A JPS5629575 A JP S5629575A JP 10638179 A JP10638179 A JP 10638179A JP 10638179 A JP10638179 A JP 10638179A JP S5629575 A JPS5629575 A JP S5629575A
Authority
JP
Japan
Prior art keywords
dimethyl
pyrazolone
acetonitrile
halogen
salt
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
JP10638179A
Other languages
Japanese (ja)
Other versions
JPS6334869B2 (en
Inventor
Toshiaki Yanai
Koji Matsui
Takao Konotsune
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.)
Sankyo Co Ltd
Original Assignee
Sankyo Co 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 Sankyo Co Ltd filed Critical Sankyo Co Ltd
Priority to JP10638179A priority Critical patent/JPS5629575A/en
Publication of JPS5629575A publication Critical patent/JPS5629575A/en
Publication of JPS6334869B2 publication Critical patent/JPS6334869B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To obtain the titled compound or a salt thereof which is a herbicide and a C-acylated substance selectively in high yield, by reacting 1,3-dimethyl-5-pyrazolone with a benzoyl halide in acetonitrile in the presence of a base.
CONSTITUTION: 1,3-Dimethyl-5-pyrazolone is reacted with a benzoyl halide of formula I (X is halogen, nitro or lower alkyl; n is 1, 2 or 3; Xn may be the same or different when n is 2 or 3; Y is halogen) to give a 1,3-dimethyl-4-substituted benzoyl-5-hydroxypyrazole of formula II or a salt thereof. The reaction is carried out in acetonitrile in the presence of a base, e.g. potassium carbonate, to introduce an acyl group into the 4-position of the pyrazole nucleus (to carry out the C-acylation) selectively.
COPYRIGHT: (C)1981,JPO&Japio
JP10638179A 1979-08-21 1979-08-21 Preparation of pyrazole derivative Granted JPS5629575A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10638179A JPS5629575A (en) 1979-08-21 1979-08-21 Preparation of pyrazole derivative

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10638179A JPS5629575A (en) 1979-08-21 1979-08-21 Preparation of pyrazole derivative

Publications (2)

Publication Number Publication Date
JPS5629575A true JPS5629575A (en) 1981-03-24
JPS6334869B2 JPS6334869B2 (en) 1988-07-12

Family

ID=14432124

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10638179A Granted JPS5629575A (en) 1979-08-21 1979-08-21 Preparation of pyrazole derivative

Country Status (1)

Country Link
JP (1) JPS5629575A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4744815A (en) * 1985-05-11 1988-05-17 Nissan Chemical Industries, Ltd. 4-benzoyl-1-alkyl (alkenyl) - pyrazoles, composition containing them, herbicidal method of using them, and intermediate in their preparation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4744815A (en) * 1985-05-11 1988-05-17 Nissan Chemical Industries, Ltd. 4-benzoyl-1-alkyl (alkenyl) - pyrazoles, composition containing them, herbicidal method of using them, and intermediate in their preparation

Also Published As

Publication number Publication date
JPS6334869B2 (en) 1988-07-12

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