GB1033513A - Gamma pyrones and preparation thereof - Google Patents

Gamma pyrones and preparation thereof

Info

Publication number
GB1033513A
GB1033513A GB318666A GB318666A GB1033513A GB 1033513 A GB1033513 A GB 1033513A GB 318666 A GB318666 A GB 318666A GB 318666 A GB318666 A GB 318666A GB 1033513 A GB1033513 A GB 1033513A
Authority
GB
United Kingdom
Prior art keywords
preparation
pyrones
gamma
acid
gamma pyrones
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
GB318666A
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
Pfizer Inc
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
Priority claimed from US171732A external-priority patent/US3130204A/en
Priority claimed from US202101A external-priority patent/US3159652A/en
Application filed by Pfizer Inc, Charles Pfizer and Co Inc filed Critical Pfizer Inc
Publication of GB1033513A publication Critical patent/GB1033513A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D309/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only ring hetero atom, not condensed with other rings
    • C07D309/34—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only ring hetero atom, not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members
    • C07D309/36—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only ring hetero atom, not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members with oxygen atoms directly attached to ring carbon atoms
    • C07D309/40—Oxygen atoms attached in positions 3 and 4, e.g. maltol

Landscapes

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

Abstract

Comenic acid is prepared by treating kojic acid with oxygen in the presence of a noble metal catalyst at a pH of at least 10, subsequently adjusting the pH to below 2.5 by acidification, and recovering the comenic acid thus produced.
GB318666A 1961-11-21 1962-11-15 Gamma pyrones and preparation thereof Expired GB1033513A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US15403661A 1961-11-21 1961-11-21
US171732A US3130204A (en) 1962-02-07 1962-02-07 Preparation of gamma-pyrones
US202101A US3159652A (en) 1962-06-13 1962-06-13 Preparation of gamma-pyrones

Publications (1)

Publication Number Publication Date
GB1033513A true GB1033513A (en) 1966-06-22

Family

ID=27387530

Family Applications (1)

Application Number Title Priority Date Filing Date
GB318666A Expired GB1033513A (en) 1961-11-21 1962-11-15 Gamma pyrones and preparation thereof

Country Status (1)

Country Link
GB (1) GB1033513A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104387355A (en) * 2014-09-27 2015-03-04 安徽金禾实业股份有限公司 Ethyl maltol crystallization mother liquor recovery method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104387355A (en) * 2014-09-27 2015-03-04 安徽金禾实业股份有限公司 Ethyl maltol crystallization mother liquor recovery method

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