GB936564A - Improvements in or relating to methods of converting a mixture of isomeric retinenes into trans, trans retinene - Google Patents
Improvements in or relating to methods of converting a mixture of isomeric retinenes into trans, trans retineneInfo
- Publication number
- GB936564A GB936564A GB8684/62A GB868462A GB936564A GB 936564 A GB936564 A GB 936564A GB 8684/62 A GB8684/62 A GB 8684/62A GB 868462 A GB868462 A GB 868462A GB 936564 A GB936564 A GB 936564A
- Authority
- GB
- United Kingdom
- Prior art keywords
- trans
- retinene
- acid
- complex
- retinenes
- 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
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C403/00—Derivatives of cyclohexane or of a cyclohexene or of cyclohexadiene, having a side-chain containing an acyclic unsaturated part of at least four carbon atoms, this part being directly attached to the cyclohexane or cyclohexene or cyclohexadiene rings, e.g. vitamin A, beta-carotene, beta-ionone
- C07C403/14—Derivatives of cyclohexane or of a cyclohexene or of cyclohexadiene, having a side-chain containing an acyclic unsaturated part of at least four carbon atoms, this part being directly attached to the cyclohexane or cyclohexene or cyclohexadiene rings, e.g. vitamin A, beta-carotene, beta-ionone having side-chains substituted by doubly-bound oxygen atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C47/00—Compounds having —CHO groups
- C07C47/38—Unsaturated compounds having —CHO groups bound to carbon atoms of rings other than six—membered aromatic rings
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C47/00—Compounds having —CHO groups
- C07C47/38—Unsaturated compounds having —CHO groups bound to carbon atoms of rings other than six—membered aromatic rings
- C07C47/45—Unsaturated compounds having —CHO groups bound to carbon atoms of rings other than six—membered aromatic rings having unsaturation outside the rings
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
- C07B2200/00—Indexing scheme relating to specific properties of organic compounds
- C07B2200/09—Geometrical isomers
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2601/00—Systems containing only non-condensed rings
- C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
- C07C2601/16—Systems containing only non-condensed rings with a six-membered ring the ring being unsaturated
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Mixtures of isomeric retinenes are converted into trans, trans-2,6-retinene by forming in the mixture a complex of the trans, trans retinene with a dihydroxy-benzene or halogen derivative thereof, and, simultaneously with such complex formation, converting the isomers other than trans, trans into the trans, trans retinene with an acid or iodine isomerization agent. The complex may be formed with pyrocatechol, tetrachloropyrocatechol or hydroquinone, and the isomerization may be effected with hydriodic acid, hydrobromic acid, hydrochloric acid, paratoluene sulphonic acid, nitric acid, sulphuric acid or elemental iodine. The complex is converted to trans, trans retinene by suspension in an alkaline solution, e.g. sodium hydroxide. Examples are given. Specifications 728,989, 728,990 and 935,006 are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR855524A FR1291622A (en) | 1961-03-14 | 1961-03-14 | Process for converting a mixture of isomeric retinenes to the aldehyde of vitamin a trans, trans-2, 6 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB936564A true GB936564A (en) | 1963-09-11 |
Family
ID=8750778
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8684/62A Expired GB936564A (en) | 1961-03-14 | 1962-03-06 | Improvements in or relating to methods of converting a mixture of isomeric retinenes into trans, trans retinene |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE1247301B (en) |
FR (1) | FR1291622A (en) |
GB (1) | GB936564A (en) |
-
1961
- 1961-03-14 FR FR855524A patent/FR1291622A/en not_active Expired
-
1962
- 1962-02-24 DE DEA39556A patent/DE1247301B/en active Pending
- 1962-03-06 GB GB8684/62A patent/GB936564A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE1247301B (en) | 1967-08-17 |
FR1291622A (en) | 1962-04-27 |
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