GB950550A - Process for racemisation of optically active pyroglutamic acid - Google Patents

Process for racemisation of optically active pyroglutamic acid

Info

Publication number
GB950550A
GB950550A GB2762062A GB2762062A GB950550A GB 950550 A GB950550 A GB 950550A GB 2762062 A GB2762062 A GB 2762062A GB 2762062 A GB2762062 A GB 2762062A GB 950550 A GB950550 A GB 950550A
Authority
GB
United Kingdom
Prior art keywords
acid
optically active
pyroglutamic acid
racemisation
pyroglutamic
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
GB2762062A
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.)
Ajinomoto Co Inc
Original Assignee
Ajinomoto 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 Ajinomoto Co Inc filed Critical Ajinomoto Co Inc
Publication of GB950550A publication Critical patent/GB950550A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D207/00—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom
    • C07D207/02—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D207/18—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having one double bond between ring members or between a ring member and a non-ring member
    • C07D207/22—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having one double bond between ring members or between a ring member and a non-ring member 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
    • C07D207/24—Oxygen or sulfur atoms
    • C07D207/26—2-Pyrrolidones
    • C07D207/273—2-Pyrrolidones 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 other ring carbon atoms
    • C07D207/277—Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
    • C07D207/28—2-Pyrrolidone-5- carboxylic acids; Functional derivatives thereof, e.g. esters, nitriles

Abstract

Racemic pyroglutamic acid is prepared from the optically active acid by heating a mixture of water and 10 to 90% by weight based on the mixture, of optically active pyroglutamic acid to between 160 DEG and 220 DEG C., and if acidic or alkaline substances are present in the mixture keeping the molecular ratio of alkaline substances to pyroglutamic acid below 0.75, and the molecular ratio of acidic to pyroglutamic preferably below 1. The product may be hydrolysed by heating with acid or alkali, to racemic glutamic acid or its salts.
GB2762062A 1961-07-18 1962-07-18 Process for racemisation of optically active pyroglutamic acid Expired GB950550A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2522161 1961-07-18

Publications (1)

Publication Number Publication Date
GB950550A true GB950550A (en) 1964-02-26

Family

ID=12159892

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2762062A Expired GB950550A (en) 1961-07-18 1962-07-18 Process for racemisation of optically active pyroglutamic acid

Country Status (2)

Country Link
DE (1) DE1445410A1 (en)
GB (1) GB950550A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4237313A (en) * 1978-04-28 1980-12-02 Sumitomo Chemical Company, Limited Racemization of optically active α-substituted-α-phenylacetic acid derivatives

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4237313A (en) * 1978-04-28 1980-12-02 Sumitomo Chemical Company, Limited Racemization of optically active α-substituted-α-phenylacetic acid derivatives

Also Published As

Publication number Publication date
DE1445410A1 (en) 1969-04-10

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