GB844684A - Improvements relating to the esterification of pyridine carboxylic acids - Google Patents

Improvements relating to the esterification of pyridine carboxylic acids

Info

Publication number
GB844684A
GB844684A GB24720/56A GB2472056A GB844684A GB 844684 A GB844684 A GB 844684A GB 24720/56 A GB24720/56 A GB 24720/56A GB 2472056 A GB2472056 A GB 2472056A GB 844684 A GB844684 A GB 844684A
Authority
GB
United Kingdom
Prior art keywords
pyridine carboxylic
esterification
catalyst
carboxylic acid
carboxylic acids
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
GB24720/56A
Inventor
Robert Sancier Aries
Albert Parsons Sachs
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.)
Aries Associates Inc
Original Assignee
Aries Associates 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 Aries Associates Inc filed Critical Aries Associates Inc
Priority to GB24720/56A priority Critical patent/GB844684A/en
Publication of GB844684A publication Critical patent/GB844684A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom 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
    • C07D213/78—Carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen, e.g. ester or nitrile radicals
    • C07D213/79—Acids; Esters
    • C07D213/80—Acids; Esters in position 3
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom 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
    • C07D213/78—Carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen, e.g. ester or nitrile radicals
    • C07D213/79—Acids; Esters
    • C07D213/803—Processes of preparation

Abstract

Esters of pyridine carboxylic acids are prepared by refluxing a pyridine carboxylic acid with an alcohol having 1-3 carbon atoms in the presence of a catalytic mass consisting of, or including the reaction product of the pyridine carboxylic acid, the alcohol and an acid esterification catalyst; and recovering the ester by distillation from the reaction mixture. The residue may then be employed as the catalyst for further esterifications. Suitable acid esterification catalysts are sulphuric and benzene sulphonic acids. The catalyst may build up in volume; the amount used in the esterification is kept substantially constant by withdrawing the excess of catalyst; this may be hydrolysed, and the pH of the solutions adjusted to the isoelectric point of the pyridine carboxylic acid, which precipitates and is recovered.
GB24720/56A 1956-08-13 1956-08-13 Improvements relating to the esterification of pyridine carboxylic acids Expired GB844684A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB24720/56A GB844684A (en) 1956-08-13 1956-08-13 Improvements relating to the esterification of pyridine carboxylic acids

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB24720/56A GB844684A (en) 1956-08-13 1956-08-13 Improvements relating to the esterification of pyridine carboxylic acids

Publications (1)

Publication Number Publication Date
GB844684A true GB844684A (en) 1960-08-17

Family

ID=10216184

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24720/56A Expired GB844684A (en) 1956-08-13 1956-08-13 Improvements relating to the esterification of pyridine carboxylic acids

Country Status (1)

Country Link
GB (1) GB844684A (en)

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