GB461790A - Process for the manufacture of laevo-ascorbic acid - Google Patents
Process for the manufacture of laevo-ascorbic acidInfo
- Publication number
- GB461790A GB461790A GB14404/36A GB1440436A GB461790A GB 461790 A GB461790 A GB 461790A GB 14404/36 A GB14404/36 A GB 14404/36A GB 1440436 A GB1440436 A GB 1440436A GB 461790 A GB461790 A GB 461790A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- laevo
- keto
- gulonic
- ascorbic acid
- 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
- C07D—HETEROCYCLIC COMPOUNDS
- C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
- C07D307/02—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
- C07D307/34—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D307/56—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members 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 ring carbon atoms
- C07D307/62—Three oxygen atoms, e.g. ascorbic acid
Abstract
Laevo-ascorbic acid (Vitamin C) is prepared by heating esters of the bismethylene ethers of 2-keto-laevo-gulonic acid with acid agents such as hydrochloric acid, sulphuric acid, potassium bisulphate, oxalic acid or formic acid. The type of alcohol used in the esterification of the bismethylene ethers is not important, basic and neutral esters yield equally satisfactory results. In examples: (1) Diacetone-2-keto-laevo-gulonic acid allyl ester is hydrolyzed with 18 per cent hydrochloric acid for 10 minutes, neutralized and evaporated to dryness. The residue is extracted with methyl alcohol from which the laevo ascorbic acid crystallizes; (2) diacetone-2-keto-laevo-gulonic acid diethylaminoethyl ester is hydrolyzed with hydrochloric acid and worked up as in example (1). Specifications 425,198 and 428,815 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE461790X | 1935-06-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB461790A true GB461790A (en) | 1937-02-24 |
Family
ID=6539897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB14404/36A Expired GB461790A (en) | 1935-06-06 | 1936-05-21 | Process for the manufacture of laevo-ascorbic acid |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB461790A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2444087A (en) * | 1945-06-15 | 1948-06-29 | Merck & Co Inc | Process of recovering an ascorbic acid compound |
-
1936
- 1936-05-21 GB GB14404/36A patent/GB461790A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2444087A (en) * | 1945-06-15 | 1948-06-29 | Merck & Co Inc | Process of recovering an ascorbic acid compound |
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