GB878907A - Isonovobiocin and the conversion of isonovobiocin to novobiocin - Google Patents
Isonovobiocin and the conversion of isonovobiocin to novobiocinInfo
- Publication number
- GB878907A GB878907A GB19209/58A GB1920958A GB878907A GB 878907 A GB878907 A GB 878907A GB 19209/58 A GB19209/58 A GB 19209/58A GB 1920958 A GB1920958 A GB 1920958A GB 878907 A GB878907 A GB 878907A
- Authority
- GB
- United Kingdom
- Prior art keywords
- isonovobiocin
- novobiocin
- crude
- acetone
- parts
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
- C07H17/00—Compounds containing heterocyclic radicals directly attached to hetero atoms of saccharide radicals
- C07H17/04—Heterocyclic radicals containing only oxygen as ring hetero atoms
- C07H17/06—Benzopyran radicals
- C07H17/065—Benzo[b]pyrans
- C07H17/075—Benzo[b]pyran-2-ones
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Biotechnology (AREA)
- General Health & Medical Sciences (AREA)
- Genetics & Genomics (AREA)
- Molecular Biology (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
Abstract
The invention relates to isonovobiocin which is an isomer of novobiocin in which the carbamyl group is in the 3-position instead of the 4-position. Novobiocin has the formula <FORM:0878907/IV (b)/1> Isonovobiocin is present in crude novobiocin and is biologically inactive. An aqueous solution of isonovobiocin at pH 9.5 to 11 on standing forms an equilibrium mixture containing two parts of novobiocin to one part of isonovobiocin. Crude novobiocin is therefore purified by treatment with aqueous acetone of 55 to 80, and especially 60% by volume in order to remove isonovobiocin preferentially to novobiocin, the resulting extract containing a mixture of novobiocin and isonovobiocian in a ratio of less than 1 e.g. two or more parts of isonovobiocin per part of novobiocin. An aqueous solution of a water-soluble alkali such as sodium carbonate, sodium hydroxide, potassium hydroxide and potassium carbonate is added to (a) the aqueous extract or (b) the solids obtained from the extract to produce a pH of 9.5 to 11.0 and the solution is allowed to stand at 15 to 35 DEG C. until the equilibrium mixture is obtained. The solution is acidified to pH 1.5, acetone added, and novobiocin crystallised therefrom. Isonovobiocin may be obtained pure by the countercurrent distribution of crude isonovobiocin in the solvent pair obtained by combining water, acetone, methyl ethyl ketone and n-hexane in the proportions 3 : 9 : 2 : 6 parts by volume. Treated with methanolic hydrochloric acid isonovobiocin is degraded to 2-O-carbamyl-4-O- methyl-5,5- dimethyl-L- lyxose which is not oxidised by periodic acid. Specification 832,140 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US878907XA | 1957-07-17 | 1957-07-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB878907A true GB878907A (en) | 1961-10-04 |
Family
ID=22207874
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB19209/58A Expired GB878907A (en) | 1957-07-17 | 1958-06-16 | Isonovobiocin and the conversion of isonovobiocin to novobiocin |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB878907A (en) |
-
1958
- 1958-06-16 GB GB19209/58A patent/GB878907A/en not_active Expired
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