FR2367069A1 - Pure D,L-cysteine prodn. - by reaction of 2-substd.-thiazoline with hydrogen cyanide to give thiazolidine-4-carbo:nitrile and reaction with aq. mineral acid - Google Patents

Pure D,L-cysteine prodn. - by reaction of 2-substd.-thiazoline with hydrogen cyanide to give thiazolidine-4-carbo:nitrile and reaction with aq. mineral acid

Info

Publication number
FR2367069A1
FR2367069A1 FR7730408A FR7730408A FR2367069A1 FR 2367069 A1 FR2367069 A1 FR 2367069A1 FR 7730408 A FR7730408 A FR 7730408A FR 7730408 A FR7730408 A FR 7730408A FR 2367069 A1 FR2367069 A1 FR 2367069A1
Authority
FR
France
Prior art keywords
reaction
cysteine
prodn
substd
hydrogen cyanide
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.)
Granted
Application number
FR7730408A
Other languages
French (fr)
Other versions
FR2367069B1 (en
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.)
Evonik Operations GmbH
Original Assignee
Degussa GmbH
Deutsche Gold und Silber Scheideanstalt
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 DE2645692A external-priority patent/DE2645692C2/en
Priority claimed from DE19762645748 external-priority patent/DE2645748C2/en
Application filed by Degussa GmbH, Deutsche Gold und Silber Scheideanstalt filed Critical Degussa GmbH
Publication of FR2367069A1 publication Critical patent/FR2367069A1/en
Application granted granted Critical
Publication of FR2367069B1 publication Critical patent/FR2367069B1/fr
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D277/00—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings
    • C07D277/02—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings
    • C07D277/04—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having no double bonds between ring members or between ring members and non-ring members
    • C07D277/06—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having no double bonds between ring members or between ring members and non-ring members 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

Abstract

Prodn. of D,L-cysteine and its salts by reaction of 2-substd. -thiazolines with hydrogen cyanide to form the corresp thiazolidine-4-carbonitriles and reaction of these with mineral acids in the presence of water. Process produces D,L-cysteine in excellent yields, with purity sufficiently high to be used directly in the food industry and by a process suitable for industrial scale prodn. known processes give only average yields and use costly starting materials.
FR7730408A 1976-10-09 1977-10-10 Pure D,L-cysteine prodn. - by reaction of 2-substd.-thiazoline with hydrogen cyanide to give thiazolidine-4-carbo:nitrile and reaction with aq. mineral acid Granted FR2367069A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2645692A DE2645692C2 (en) 1976-10-09 1976-10-09 Thiazolidine-4-carbonitriles
DE19762645748 DE2645748C2 (en) 1976-10-09 1976-10-09 Process for the production of D, L-cysteine

Publications (2)

Publication Number Publication Date
FR2367069A1 true FR2367069A1 (en) 1978-05-05
FR2367069B1 FR2367069B1 (en) 1982-09-10

Family

ID=25770992

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7730408A Granted FR2367069A1 (en) 1976-10-09 1977-10-10 Pure D,L-cysteine prodn. - by reaction of 2-substd.-thiazoline with hydrogen cyanide to give thiazolidine-4-carbo:nitrile and reaction with aq. mineral acid

Country Status (3)

Country Link
FR (1) FR2367069A1 (en)
IT (1) IT1143608B (en)
SU (1) SU715018A3 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2034536A1 (en) * 1969-02-11 1970-12-11 Academia Republ Roman A Thiazolidinecarboxylic acid-4derivs
FR2035814A1 (en) * 1968-10-29 1970-12-24 Roumanie Academie
FR2160483A2 (en) * 1971-11-15 1973-06-29 Degussa
FR2165664A5 (en) * 1971-12-22 1973-08-03 Degussa

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2035814A1 (en) * 1968-10-29 1970-12-24 Roumanie Academie
FR2034536A1 (en) * 1969-02-11 1970-12-11 Academia Republ Roman A Thiazolidinecarboxylic acid-4derivs
FR2160483A2 (en) * 1971-11-15 1973-06-29 Degussa
FR2165664A5 (en) * 1971-12-22 1973-08-03 Degussa

Also Published As

Publication number Publication date
SU715018A3 (en) 1980-02-05
FR2367069B1 (en) 1982-09-10
IT1143608B (en) 1986-10-22

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Legal Events

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