JPS5782374A - Preparation of pyrazole derivative - Google Patents

Preparation of pyrazole derivative

Info

Publication number
JPS5782374A
JPS5782374A JP55159046A JP15904680A JPS5782374A JP S5782374 A JPS5782374 A JP S5782374A JP 55159046 A JP55159046 A JP 55159046A JP 15904680 A JP15904680 A JP 15904680A JP S5782374 A JPS5782374 A JP S5782374A
Authority
JP
Japan
Prior art keywords
compound
formula
lower alkyl
catalyst
basic
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
JP55159046A
Other languages
Japanese (ja)
Other versions
JPH0233708B2 (en
Inventor
Muneharu Mizukai
Toshiaki Yanai
Kazuo Tomita
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 JP55159046A priority Critical patent/JPS5782374A/en
Priority to KR1019810003944A priority patent/KR860001878B1/en
Publication of JPS5782374A publication Critical patent/JPS5782374A/en
Publication of JPH0233708B2 publication Critical patent/JPH0233708B2/ja
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D231/00—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings
    • C07D231/02—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings
    • C07D231/10—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
    • C07D231/14—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D231/28—Two oxygen or sulfur atoms
    • C07D231/30—Two oxygen or sulfur atoms attached in positions 3 and 5

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Plural Heterocyclic Compounds (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

PURPOSE: To prepare 4-benzoylpyrazole derivative useful as an intermediate of herbicide, by the rearrangement reaction of the mostly novel 1-benzoylpyrazole derivative in the presence of a catalyst.
CONSTITUTION: The compound of formula I is prepared by contacting (A) 1mol of the compound of formula II (R1 is lower alkyl; X is halogen, lower alkyl, or NO2; n is integer 0W3) which is a novel compound excepting 1-benzoyl- 5-hydroxy-3-methylpyrazole, with (B) pref. about 1.0W6.0mol, esp. about 1.5W 3.0mol of a rearrangement catalyst such as Lewis acids, azoles, basic alkali metal salts, and/or basic alkaline earth metal salts, pref. at 100W160°C. The compound of formula II can be obtained by reacting the compound of formula III (R2 is lower alkyl) with the compound of formula IV, and catalytically reacting the resultant compound of formula V in an inert solvent in the presence of a basic catalyst.
COPYRIGHT: (C)1982,JPO&Japio
JP55159046A 1980-11-12 1980-11-12 Preparation of pyrazole derivative Granted JPS5782374A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP55159046A JPS5782374A (en) 1980-11-12 1980-11-12 Preparation of pyrazole derivative
KR1019810003944A KR860001878B1 (en) 1980-11-12 1981-10-19 Preparation process for pyrazide derivatives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55159046A JPS5782374A (en) 1980-11-12 1980-11-12 Preparation of pyrazole derivative

Publications (2)

Publication Number Publication Date
JPS5782374A true JPS5782374A (en) 1982-05-22
JPH0233708B2 JPH0233708B2 (en) 1990-07-30

Family

ID=15685039

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55159046A Granted JPS5782374A (en) 1980-11-12 1980-11-12 Preparation of pyrazole derivative

Country Status (2)

Country Link
JP (1) JPS5782374A (en)
KR (1) KR860001878B1 (en)

Also Published As

Publication number Publication date
KR830007573A (en) 1983-11-04
KR860001878B1 (en) 1986-10-24
JPH0233708B2 (en) 1990-07-30

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