GB1029201A - Process for the rearrangement of cyclic oximes - Google Patents

Process for the rearrangement of cyclic oximes

Info

Publication number
GB1029201A
GB1029201A GB1395/63A GB139563A GB1029201A GB 1029201 A GB1029201 A GB 1029201A GB 1395/63 A GB1395/63 A GB 1395/63A GB 139563 A GB139563 A GB 139563A GB 1029201 A GB1029201 A GB 1029201A
Authority
GB
United Kingdom
Prior art keywords
oxime
exchanger
ion
solvent
lactam
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
GB1395/63A
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.)
Inventa AG fuer Forschung und Patentverwertung
Original Assignee
Inventa AG fuer Forschung und Patentverwertung
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 Inventa AG fuer Forschung und Patentverwertung filed Critical Inventa AG fuer Forschung und Patentverwertung
Publication of GB1029201A publication Critical patent/GB1029201A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D201/00Preparation, separation, purification or stabilisation of unsubstituted lactams
    • C07D201/02Preparation of lactams
    • C07D201/04Preparation of lactams from or via oximes by Beckmann rearrangement
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D201/00Preparation, separation, purification or stabilisation of unsubstituted lactams
    • C07D201/16Separation or purification
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D225/00Heterocyclic compounds containing rings of more than seven members having one nitrogen atom as the only ring hetero atom
    • C07D225/02Heterocyclic compounds containing rings of more than seven members having one nitrogen atom as the only ring hetero atom not condensed with other rings

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Other In-Based Heterocyclic Compounds (AREA)

Abstract

Lactams are made by contracting a hot solution of a cyclic oxime, containing no more than 6 carbon atoms, in a non-aqueous organic acid that is a solvent for the oxime, with a sulphonic acid ion exchanger, whereby the oxime is converted to the lactam which is bound by the sulphonic groups on the ion-exchanger, separating the ion-exchanger from the solvent for the oxime and removing the lactam from the ionexchanger with an aqueous solvent at a temperature below 5 DEG C. Specified solvents for the oxime are anhydrous acetic acid and an anhydrous acetic acid/acetic anhydride mixture. Suitable temperatures to which the oxime solution is heated are in the range 107-120 DEG C. Examples relate to the preparation of caprolactam.
GB1395/63A 1962-01-13 1963-01-11 Process for the rearrangement of cyclic oximes Expired GB1029201A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH41862A CH394212A (en) 1962-01-13 1962-01-13 Process for rearrangement of cyclic oximes

Publications (1)

Publication Number Publication Date
GB1029201A true GB1029201A (en) 1966-05-11

Family

ID=4186573

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1395/63A Expired GB1029201A (en) 1962-01-13 1963-01-11 Process for the rearrangement of cyclic oximes

Country Status (3)

Country Link
CH (1) CH394212A (en)
GB (1) GB1029201A (en)
NL (1) NL140238B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3944542A (en) * 1971-05-15 1976-03-16 Stamicarbon, B.V. Conversion of ketoximes into lactams in organic sulfoxide solvents
CN1036583C (en) * 1992-06-30 1997-12-03 Dsm有限公司 Process for the conversion of oximes into the corresponding amides
CN100363351C (en) * 2004-11-17 2008-01-23 中国石油化工股份有限公司 Production of hexyl lactam

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3944542A (en) * 1971-05-15 1976-03-16 Stamicarbon, B.V. Conversion of ketoximes into lactams in organic sulfoxide solvents
CN1036583C (en) * 1992-06-30 1997-12-03 Dsm有限公司 Process for the conversion of oximes into the corresponding amides
CN100363351C (en) * 2004-11-17 2008-01-23 中国石油化工股份有限公司 Production of hexyl lactam

Also Published As

Publication number Publication date
CH394212A (en) 1965-06-30
NL140238B (en) 1973-11-15

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