GB912034A - Improvements in the preparation of caprolactam - Google Patents

Improvements in the preparation of caprolactam

Info

Publication number
GB912034A
GB912034A GB10351/60A GB1035160A GB912034A GB 912034 A GB912034 A GB 912034A GB 10351/60 A GB10351/60 A GB 10351/60A GB 1035160 A GB1035160 A GB 1035160A GB 912034 A GB912034 A GB 912034A
Authority
GB
United Kingdom
Prior art keywords
nitrosyl
cyclohexane
cyclohexyl
acyl group
nitrosylation
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
GB10351/60A
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.)
SNIA Viscosa SpA
Original Assignee
SNIA Viscosa SpA
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 SNIA Viscosa SpA filed Critical SNIA Viscosa SpA
Publication of GB912034A publication Critical patent/GB912034A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D201/00—Preparation, separation, purification or stabilisation of unsubstituted lactams
    • C07D201/02—Preparation of lactams
    • C07D201/08—Preparation of lactams from carboxylic acids or derivatives thereof, e.g. hydroxy carboxylic acids, lactones or nitriles
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D223/00—Heterocyclic compounds containing seven-membered rings having one nitrogen atom as the only ring hetero atom
    • C07D223/02—Heterocyclic compounds containing seven-membered rings having one nitrogen atom as the only ring hetero atom not condensed with other rings
    • C07D223/06—Heterocyclic compounds containing seven-membered rings having one nitrogen atom as the only ring hetero atom not condensed with other rings 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
    • C07D223/08—Oxygen atoms
    • C07D223/10—Oxygen atoms attached in position 2

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Pyrane Compounds (AREA)

Abstract

Caprolactam is prepared by reacting a cyclohexane derivative of formula <FORM:0912034/IV (b)/1> where Y is a substituted or unsubstituted carboxylic acyl group other than an aromatic carboxylic acyl group, with a nitrosylation agent capable of providing NO+ ions in the reaction medium, in the presence of free sulphuric acid. Specified starting materials are those in which Y is -COCH3, -COC(CH3)3, -COCF3, -COCOC6H5, -COCOC6H11 (cyclohexyl) and -C6H11 (cyclohexyl). Specified nitrosylation agents are nitrosyl sulphuric acid, nitrosyl sulphuric anhydride, nitrosyl chloride, nitrosyl bromide, nitrites such as sodium nitrite, alkyl nitrites, and nitrous anhydride. Examples use trimethyl acetyl cyclohexane (obtaining trimethyl acetic acid as by-product), trifluoroacetyl cyclohexane, and dicyclohexylketone. Specifications 904,302 and 904,413 are referred to.
GB10351/60A 1959-04-06 1960-03-23 Improvements in the preparation of caprolactam Expired GB912034A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT560359 1959-04-06

Publications (1)

Publication Number Publication Date
GB912034A true GB912034A (en) 1962-12-05

Family

ID=11120316

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10351/60A Expired GB912034A (en) 1959-04-06 1960-03-23 Improvements in the preparation of caprolactam

Country Status (1)

Country Link
GB (1) GB912034A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104529897A (en) * 2014-12-04 2015-04-22 湘潭大学 Method for preparing caprolactam

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104529897A (en) * 2014-12-04 2015-04-22 湘潭大学 Method for preparing caprolactam

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