GB877556A - Purification of a vitamin a intermediate - Google Patents
Purification of a vitamin a intermediateInfo
- Publication number
- GB877556A GB877556A GB8756/59A GB875659A GB877556A GB 877556 A GB877556 A GB 877556A GB 8756/59 A GB8756/59 A GB 8756/59A GB 875659 A GB875659 A GB 875659A GB 877556 A GB877556 A GB 877556A
- Authority
- GB
- United Kingdom
- Prior art keywords
- compound
- alkali metal
- oxenin
- formula
- purification
- 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
- 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
Abstract
The invention comprises a compound obtained by the reaction of a compound of formula I <FORM:0877556/IV (b)/1> referred to as oxenin, with an alkali metal hydroxide, one mole of said compound containing from about 1 to about 1.5 moles of alkali metal, and a process for the purification of a compound of formula I which comprises adding an aqueous solution of from about 5% to about 70% by weight of an alkali metal hydroxide to the aforesaid crude compound, recovering the resulting product and treating said product with acid. Crude oxenin is obtained by condensing 2-methyl-4 - (2,6,6 - trimethylcyclohexen-1-yl)-but-2-enal with 3-methylpent-2-ene-4-yne-1-ol in a Grignard reaction. As alkali metal hydroxides there may be used sodium, lithium or potassium hydroxides. Examples illustrate the use of various starting compounds and solvents.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US877556XA | 1958-04-23 | 1958-04-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB877556A true GB877556A (en) | 1961-09-13 |
Family
ID=22207057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8756/59A Expired GB877556A (en) | 1958-04-23 | 1959-03-13 | Purification of a vitamin a intermediate |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB877556A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106748943A (en) * | 2016-12-30 | 2017-05-31 | 厦门金达威维生素有限公司 | The method and device that a kind of continuous hydrolysis of the double grignard condensation products of vitamin A intermediate are neutralized |
| WO2019016315A1 (en) * | 2017-07-20 | 2019-01-24 | Dsm Ip Assets B.V. | Process of production of 3,7-dimethyl-9-(2,6,6-trimethyl-1-cyclohexen-1-yl)-nona-2z,7e-dien-4-yne-1,6-diol |
-
1959
- 1959-03-13 GB GB8756/59A patent/GB877556A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106748943A (en) * | 2016-12-30 | 2017-05-31 | 厦门金达威维生素有限公司 | The method and device that a kind of continuous hydrolysis of the double grignard condensation products of vitamin A intermediate are neutralized |
| WO2019016315A1 (en) * | 2017-07-20 | 2019-01-24 | Dsm Ip Assets B.V. | Process of production of 3,7-dimethyl-9-(2,6,6-trimethyl-1-cyclohexen-1-yl)-nona-2z,7e-dien-4-yne-1,6-diol |
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