GB903768A - Improvements in and relating to caprolactams - Google Patents

Improvements in and relating to caprolactams

Info

Publication number
GB903768A
GB903768A GB3185/59A GB318559A GB903768A GB 903768 A GB903768 A GB 903768A GB 3185/59 A GB3185/59 A GB 3185/59A GB 318559 A GB318559 A GB 318559A GB 903768 A GB903768 A GB 903768A
Authority
GB
United Kingdom
Prior art keywords
caprolactam
amino
oximino
molar proportions
hydrogen
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
GB3185/59A
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.)
Novartis AG
National Starch and Chemical Investment Holding Corp
Original Assignee
JR Geigy AG
National Starch and Chemical Investment Holding Corp
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 JR Geigy AG, National Starch and Chemical Investment Holding Corp filed Critical JR Geigy AG
Publication of GB903768A publication Critical patent/GB903768A/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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Other In-Based Heterocyclic Compounds (AREA)

Abstract

The invention comprises a -oximino-e -caprolactam and the preparation thereof, which comprises heating a :a -dichloro-e -caprolactam with between one and three molar proportions of hydroxylamine or the mineral acid salts thereof in a solution of at least three equivalents of ammonia in a C1-C3 saturated alcohol to a temperature of between 50 DEG C. and 100 DEG C. The a -oximino-e -caprolactam may be further reduced to DL-a -amino-e -caprolactam by reduction with two molar proportions of hydrogen in a two-phase system consisting of a nickel or palladium catalyst and a solvent for the oxime which is resistant to attack by activated hydrogen, is non-acidic when nickel catalysts are used and, except for salt formation, does not react with the amino-caprolactam formed. Methods for the purification of a -amino-e -caprolactam and the hydrochlorides and acetates thereof are described.
GB3185/59A 1958-01-31 1959-01-29 Improvements in and relating to caprolactams Expired GB903768A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH5531758A CH366280A (en) 1958-01-31 1958-01-31 Process for the preparation of dl-a-amino-e-caprolactam

Publications (1)

Publication Number Publication Date
GB903768A true GB903768A (en) 1962-08-22

Family

ID=4519793

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3185/59A Expired GB903768A (en) 1958-01-31 1959-01-29 Improvements in and relating to caprolactams

Country Status (2)

Country Link
CH (1) CH366280A (en)
GB (1) GB903768A (en)

Also Published As

Publication number Publication date
CH366280A (en) 1962-12-31

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