CA2209486A1 - Preparation of 3,5-diarylpyrazoles - Google Patents

Preparation of 3,5-diarylpyrazoles

Info

Publication number
CA2209486A1
CA2209486A1 CA002209486A CA2209486A CA2209486A1 CA 2209486 A1 CA2209486 A1 CA 2209486A1 CA 002209486 A CA002209486 A CA 002209486A CA 2209486 A CA2209486 A CA 2209486A CA 2209486 A1 CA2209486 A1 CA 2209486A1
Authority
CA
Canada
Prior art keywords
diaryl
general formula
substituted aryl
diarylpyrazoles
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
CA002209486A
Other languages
French (fr)
Other versions
CA2209486C (en
Inventor
Hans Rupert Merkle
Erich Fretschner
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.)
BASF SE
Original Assignee
Individual
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
Priority claimed from DE19500838A external-priority patent/DE19500838A1/en
Application filed by Individual filed Critical Individual
Publication of CA2209486A1 publication Critical patent/CA2209486A1/en
Application granted granted Critical
Publication of CA2209486C publication Critical patent/CA2209486C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • C07D231/12—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 only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms

Abstract

A process for producing 3,5-diaryl pyrazolene of general formula (I), where R1 and R3 are possibly substituted aryl radicals, R2 is hydrogen, C1-C5 alkyl and possibly substituted aryl, in which hydrazine hydrate is reacted with 1,3 diaryl propenonene of general formula (II), where R1, R2 and R3 have the above meanings, in sulphuric acid in the presence of iodine or an iodine compound.
CA002209486A 1995-01-13 1996-01-04 Preparation of 3,5-diarylpyrazoles Expired - Fee Related CA2209486C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19500838A DE19500838A1 (en) 1995-01-13 1995-01-13 Process for the preparation of 3,5-diarylpyrazoles
DE19500838.3 1995-01-13
PCT/EP1996/000011 WO1996021650A1 (en) 1995-01-13 1996-01-04 Process for producing 3,5-diaryl pyrazolene

Publications (2)

Publication Number Publication Date
CA2209486A1 true CA2209486A1 (en) 1996-07-18
CA2209486C CA2209486C (en) 2007-06-26

Family

ID=38279037

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002209486A Expired - Fee Related CA2209486C (en) 1995-01-13 1996-01-04 Preparation of 3,5-diarylpyrazoles

Country Status (1)

Country Link
CA (1) CA2209486C (en)

Also Published As

Publication number Publication date
CA2209486C (en) 2007-06-26

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed