ES273183A1 - Procedure for the preparation of thiophen-2,5-dicharboxylic acid (Machine-translation by Google Translate, not legally binding) - Google Patents

Procedure for the preparation of thiophen-2,5-dicharboxylic acid (Machine-translation by Google Translate, not legally binding)

Info

Publication number
ES273183A1
ES273183A1 ES0273183A ES273183A ES273183A1 ES 273183 A1 ES273183 A1 ES 273183A1 ES 0273183 A ES0273183 A ES 0273183A ES 273183 A ES273183 A ES 273183A ES 273183 A1 ES273183 A1 ES 273183A1
Authority
ES
Spain
Prior art keywords
acid
translation
preparation
machine
legally binding
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
ES0273183A
Other languages
Spanish (es)
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.)
Novartis AG
Original Assignee
Ciba Geigy 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 Geigy AG filed Critical Ciba Geigy AG
Publication of ES273183A1 publication Critical patent/ES273183A1/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

Landscapes

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

Abstract

Process for the preparation of thiophene-2,5-dicarboxylic acid, characterized in that alkali or alkaline-earth salts of alpha, alpha'-dichloroadipine with alkali sulfides and the salts produced are reacted in an aqueous medium, preferably without intermediate precipitation. of tetrahydrothiophen-2,5-di-carboxylic acid are transformed into the free dicarboxylic acid, the tetrahydrothiophen-2,5-dicarboxylic acid is treated in an acid medium with chlorine molecules and is also unfolded with the resulting chlorination product in hydrochloric medium . (Machine-translation by Google Translate, not legally binding)
ES0273183A 1961-11-14 1961-12-22 Procedure for the preparation of thiophen-2,5-dicharboxylic acid (Machine-translation by Google Translate, not legally binding) Expired ES273183A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1321461A CH426870A (en) 1961-11-14 1961-11-14 Process for the preparation of thiophene-2,5-dicarboxylic acid

Publications (1)

Publication Number Publication Date
ES273183A1 true ES273183A1 (en) 1962-07-01

Family

ID=4390408

Family Applications (1)

Application Number Title Priority Date Filing Date
ES0273183A Expired ES273183A1 (en) 1961-11-14 1961-12-22 Procedure for the preparation of thiophen-2,5-dicharboxylic acid (Machine-translation by Google Translate, not legally binding)

Country Status (2)

Country Link
CH (1) CH426870A (en)
ES (1) ES273183A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW420674B (en) 1994-08-25 2001-02-01 Ciba Sc Holding Ag Process for the preparation of thiophene-2,5-dicarboxylic acid and the dichloride thereof

Also Published As

Publication number Publication date
CH426870A (en) 1966-12-31

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