GB521831A - Improvements in or relating to the production of ascorbic acids - Google Patents

Improvements in or relating to the production of ascorbic acids

Info

Publication number
GB521831A
GB521831A GB18822/39A GB1882239A GB521831A GB 521831 A GB521831 A GB 521831A GB 18822/39 A GB18822/39 A GB 18822/39A GB 1882239 A GB1882239 A GB 1882239A GB 521831 A GB521831 A GB 521831A
Authority
GB
United Kingdom
Prior art keywords
acid
magnesium
iron
ascorbic acids
keto
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
Application number
GB18822/39A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pfizer Inc
Original Assignee
Charles Pfizer and Co Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Charles Pfizer and Co Inc filed Critical Charles Pfizer and Co Inc
Publication of GB521831A publication Critical patent/GB521831A/en
Expired legal-status Critical Current

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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

521,831. Ascorbic acids. PFIZER & CO., C. June 28, 1939, Nos. 18822 and 18823. Convention dates, July 15, 1938, and Aug. 31, 1938. [Class 2 (iii)] Esters of 2-keto-l-gulonic acid and 2-keto-lgluconic acid are converted into the corresponding ascorbic acids by treating in aqueous solution with magnesium, iron, cobalt, nickel, manganese, zinc or cadmium without the addition of acid or alkaline substances. Magnesium is particularly effective, optionally in the presence of a water-miscible solvent such as alcohol or dioxane. Examples describe the process in the presence of each of the metals mentioned above. In example 5, in which iron is used, the iron is removed by adding calcium ferrocyanide and the calcium by oxalic acid. Manganese, zinc, nickel and cobalt when used are removed as ferrocyanides, and magnesium as oxalate. Specification 428,815 is referred to.
GB18822/39A 1938-07-15 1939-06-28 Improvements in or relating to the production of ascorbic acids Expired GB521831A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US521831XA 1938-07-15 1938-07-15

Publications (1)

Publication Number Publication Date
GB521831A true GB521831A (en) 1940-05-31

Family

ID=21975982

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18822/39A Expired GB521831A (en) 1938-07-15 1939-06-28 Improvements in or relating to the production of ascorbic acids

Country Status (1)

Country Link
GB (1) GB521831A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1142861B (en) * 1957-05-31 1963-01-31 Miles Lab Process for the production of isoascorbic acid

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1142861B (en) * 1957-05-31 1963-01-31 Miles Lab Process for the production of isoascorbic acid

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