JPS56118039A - Preparation of unsaturated carboxylic acid - Google Patents

Preparation of unsaturated carboxylic acid

Info

Publication number
JPS56118039A
JPS56118039A JP2185180A JP2185180A JPS56118039A JP S56118039 A JPS56118039 A JP S56118039A JP 2185180 A JP2185180 A JP 2185180A JP 2185180 A JP2185180 A JP 2185180A JP S56118039 A JPS56118039 A JP S56118039A
Authority
JP
Japan
Prior art keywords
carboxylic acid
halogen
alkyl
crown
acid
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
JP2185180A
Other languages
Japanese (ja)
Inventor
Yasushi Higuchi
Kazutaro Koike
Chihiro Yazawa
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.)
Ihara Chemical Industry Co Ltd
Original Assignee
Ihara Chemical Industry 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 Ihara Chemical Industry Co Ltd filed Critical Ihara Chemical Industry Co Ltd
Priority to JP2185180A priority Critical patent/JPS56118039A/en
Publication of JPS56118039A publication Critical patent/JPS56118039A/en
Pending legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts

Landscapes

  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

PURPOSE: To obtain the titled compound useful as a raw material of various kind of synthetic industrial or intermediate raw materials for drugs, agricultural chemicals, etc. in high purity in high yield, by reacting a halogenocarboxylic acid with a base using at least one crown ether as a catalyst.
CONSTITUTION: A halogenocarboxylic acid (e.g., 3,4-dibromopentanoic acid ethyl ester, etc.) shown by the formula I (R1 and R2 are H, halogen, alkyl, aryl; R3 is H, halogen, alkyl; R4 is H, alkenyl, alkyl, phenyl, benzyl, cyclo ring; X1 and X2 are H or halogen) is reacted with a base, e.g., NaOH to give an unsaturated carboxylic acid (e.g., 4-bromo-2-pentenoic acid ethyl ester) shown by the formula II. In this reaction, 0.1W10mol% based on halogeno saturated carboxylic acid of a crown ether (e.g., dibenzo-18-crown-6, dicyclohexyl-18-crown-6, etc.) is used.
EFFECT: Having high reaction rate, side reactions can be suppressed.
COPYRIGHT: (C)1981,JPO&Japio
JP2185180A 1980-02-23 1980-02-23 Preparation of unsaturated carboxylic acid Pending JPS56118039A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2185180A JPS56118039A (en) 1980-02-23 1980-02-23 Preparation of unsaturated carboxylic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2185180A JPS56118039A (en) 1980-02-23 1980-02-23 Preparation of unsaturated carboxylic acid

Publications (1)

Publication Number Publication Date
JPS56118039A true JPS56118039A (en) 1981-09-16

Family

ID=12066601

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2185180A Pending JPS56118039A (en) 1980-02-23 1980-02-23 Preparation of unsaturated carboxylic acid

Country Status (1)

Country Link
JP (1) JPS56118039A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5896094B1 (en) * 2014-08-08 2016-03-30 ユニマテック株式会社 Mixture of polyfluoroalkenecarboxylic acid or salt thereof and process for producing the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5896094B1 (en) * 2014-08-08 2016-03-30 ユニマテック株式会社 Mixture of polyfluoroalkenecarboxylic acid or salt thereof and process for producing the same

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