GB2003137A - Process for the preparation of homogentisic lactone - Google Patents
Process for the preparation of homogentisic lactoneInfo
- 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- Withdrawn
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.
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)
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 |
-
1978
- 1978-07-13 GB GB7829800A patent/GB2003137A/en not_active Withdrawn
Cited By (1)
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) |