GB950900A - Process for the preparation of thiophene-2,5-dicarboxylic acid - Google Patents

Process for the preparation of thiophene-2,5-dicarboxylic acid

Info

Publication number
GB950900A
GB950900A GB45326/61A GB4532661A GB950900A GB 950900 A GB950900 A GB 950900A GB 45326/61 A GB45326/61 A GB 45326/61A GB 4532661 A GB4532661 A GB 4532661A GB 950900 A GB950900 A GB 950900A
Authority
GB
United Kingdom
Prior art keywords
dicarboxylic acid
thiophene
preparation
acid
alkali
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.)
Expired
Application number
GB45326/61A
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 Schweiz AG
Original Assignee
Ciba AG
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 Ciba AG filed Critical Ciba AG
Publication of GB950900A publication Critical patent/GB950900A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D333/00—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom
    • C07D333/02—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings
    • C07D333/04—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom
    • C07D333/26—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom 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
    • C07D333/38—Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D495/00—Heterocyclic compounds containing in the condensed system at least one hetero ring having sulfur atoms as the only ring hetero atoms
    • C07D495/02—Heterocyclic compounds containing in the condensed system at least one hetero ring having sulfur atoms as the only ring hetero atoms in which the condensed system contains two hetero rings
    • C07D495/04—Ortho-condensed systems

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Heterocyclic Compounds Containing Sulfur Atoms (AREA)

Abstract

Thiophene-2:5-dicarboxylic acid is prepared by reacting an alkali or alkaline earth metal salt of a :a 1-dichloroadipic acid with an alkali metal sulphide in an aqueous medium, converting the resulting salt of tetrahydrothiophene-2:5-dicarboxylic acid to the free acid, chlorinating with molecular chlorine in an acidic medium, and dehydrochlorinating by heat. Specification 934,292 is referred to.
GB45326/61A 1960-12-23 1961-12-18 Process for the preparation of thiophene-2,5-dicarboxylic acid Expired GB950900A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1439460A CH396033A (en) 1960-12-23 1960-12-23 Process for the preparation of thiophene-2,5-dicarboxylic acid

Publications (1)

Publication Number Publication Date
GB950900A true GB950900A (en) 1964-02-26

Family

ID=4400446

Family Applications (1)

Application Number Title Priority Date Filing Date
GB45326/61A Expired GB950900A (en) 1960-12-23 1961-12-18 Process for the preparation of thiophene-2,5-dicarboxylic acid

Country Status (2)

Country Link
CH (1) CH396033A (en)
GB (1) GB950900A (en)

Also Published As

Publication number Publication date
CH396033A (en) 1965-07-31

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