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GB621209A - Process for the production of esters of mono-methylene-ethers of 2 keto-l-gulonic acid - Google Patents

Process for the production of esters of mono-methylene-ethers of 2 keto-l-gulonic acid

Info

Publication number
GB621209A
GB621209A GB7028/46A GB702846A GB621209A GB 621209 A GB621209 A GB 621209A GB 7028/46 A GB7028/46 A GB 7028/46A GB 702846 A GB702846 A GB 702846A GB 621209 A GB621209 A GB 621209A
Authority
GB
United Kingdom
Prior art keywords
acid
keto
ethers
benzene
employed
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
GB7028/46A
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.)
NAARDEN CHEM FAB
Original Assignee
NAARDEN CHEM FAB
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 NAARDEN CHEM FAB filed Critical NAARDEN CHEM FAB
Publication of GB621209A publication Critical patent/GB621209A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07HSUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
    • C07H7/00Compounds containing non-saccharide radicals linked to saccharide radicals by a carbon-to-carbon bond
    • C07H7/02Acyclic radicals

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Biotechnology (AREA)
  • General Health & Medical Sciences (AREA)
  • Genetics & Genomics (AREA)
  • Molecular Biology (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Esters of monomethylene ethers of 2-keto-l-gulonic acid are made by heating a bismethylene ether of 2-keto-l-gulonic acid or a salt thereof with an alcohol in the presence of an esterifying catalyst in a quantity less than 1 per cent of the alcohol, excluding any required for neutralization, when a salt is employed as starting material, and simultaneously removing the moisture present, the hydration water, and the carbonyl compound liberated by azeotropic distillation. An auxiliary liquid such as hexane, benzene, toluene, cyclohexane, carbon tetrachloride, trichlorethylene, and dichlorethane may be employed. Alcohols specified are ethanol, glycol, propanols, allyl alcohol, butanols, and esterifying catalysts specified are hydrochloric, sulphuric and phosphoric acids, benzene and naphthalene sulphonic acids, and pyridine. When salts of bismethylene ethers of 2-keto-l-gulonic acid are employed, enough acid is present to neutralize the base liberated, and as bis-methylene ethers the compounds of 2-keto-l-gulonic acid with acetone, methylethylketone, cyclohexanone, or benzaldehyde are specified. Reduced or atmospheric pressure may be employed, and the process may be carried out continuously. The products may be converted to ascorbic acid by heating in an acid medium. Examples describe the reaction of diacetoneketogulonic acid with (1) ethanol, and (2) butanol, in presence of benzene and sulphuric acid, and also (3) the reaction of diacetoneketogulonic acid sodium salt with ethanol in presence of hydrochloric acid and benzene.
GB7028/46A 1943-08-03 1946-03-06 Process for the production of esters of mono-methylene-ethers of 2 keto-l-gulonic acid Expired GB621209A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL621209X 1943-08-03

Publications (1)

Publication Number Publication Date
GB621209A true GB621209A (en) 1949-04-06

Family

ID=19788434

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7028/46A Expired GB621209A (en) 1943-08-03 1946-03-06 Process for the production of esters of mono-methylene-ethers of 2 keto-l-gulonic acid

Country Status (1)

Country Link
GB (1) GB621209A (en)

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