GB2003137A - Process for the preparation of homogentisic lactone - Google Patents

Process for the preparation of homogentisic lactone

Info

Publication number
GB2003137A
GB2003137A GB7829800A GB7829800A GB2003137A GB 2003137 A GB2003137 A GB 2003137A GB 7829800 A GB7829800 A GB 7829800A GB 7829800 A GB7829800 A GB 7829800A GB 2003137 A GB2003137 A GB 2003137A
Authority
GB
United Kingdom
Prior art keywords
homogentisic
lactone
preparation
give
alkali metal
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.)
Withdrawn
Application number
GB7829800A
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries 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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB7829800A priority Critical patent/GB2003137A/en
Publication of GB2003137A publication Critical patent/GB2003137A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
    • C07D307/77—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom ortho- or peri-condensed with carbocyclic rings or ring systems
    • C07D307/78—Benzo [b] furans; Hydrogenated benzo [b] furans
    • C07D307/82—Benzo [b] furans; Hydrogenated benzo [b] furans 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 carbon atoms of the hetero ring
    • C07D307/84—Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
    • C07D307/77—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom ortho- or peri-condensed with carbocyclic rings or ring systems
    • C07D307/78—Benzo [b] furans; Hydrogenated benzo [b] furans
    • C07D307/82—Benzo [b] furans; Hydrogenated benzo [b] furans 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 carbon atoms of the hetero ring
    • C07D307/83—Oxygen atoms

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Process for the preparation of homogentisic lactone by reacting hydroquinone with a di(lower alkyl) chloro (or bromo) malonate and an alkali metal lower alkoxide to give an alkali metal 1oxidobenzo[b]furan which is subsequently decarboxylated by treatment with a strong mineral acid to give homogentisic lactone. The latter is readily converted into homogentisic acid by conventional means.
GB7829800A 1977-08-26 1978-07-13 Process for the preparation of homogentisic lactone Withdrawn GB2003137A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7829800A GB2003137A (en) 1977-08-26 1978-07-13 Process for the preparation of homogentisic lactone

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3593177 1977-08-26
GB7829800A GB2003137A (en) 1977-08-26 1978-07-13 Process for the preparation of homogentisic lactone

Publications (1)

Publication Number Publication Date
GB2003137A true GB2003137A (en) 1979-03-07

Family

ID=26262916

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7829800A Withdrawn GB2003137A (en) 1977-08-26 1978-07-13 Process for the preparation of homogentisic lactone

Country Status (1)

Country Link
GB (1) GB2003137A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4620850A (en) * 1979-09-28 1986-11-04 Wella Aktiengesellschaft Composition and process for the oxidative dyeing of hair

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4620850A (en) * 1979-09-28 1986-11-04 Wella Aktiengesellschaft Composition and process for the oxidative dyeing of hair

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)