GB1256416A - RECOVERY OF alpha-AMINO-epsilon-CAPROLACTAM MONOHYDROCHLORIDE OF ENHANCED OPTICAL PURITY - Google Patents

RECOVERY OF alpha-AMINO-epsilon-CAPROLACTAM MONOHYDROCHLORIDE OF ENHANCED OPTICAL PURITY

Info

Publication number
GB1256416A
GB1256416A GB2382769A GB2382769A GB1256416A GB 1256416 A GB1256416 A GB 1256416A GB 2382769 A GB2382769 A GB 2382769A GB 2382769 A GB2382769 A GB 2382769A GB 1256416 A GB1256416 A GB 1256416A
Authority
GB
United Kingdom
Prior art keywords
monohydrochloride
caprolactam
recovery
amino
salt
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
GB2382769A
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.)
Stamicarbon BV
Original Assignee
Stamicarbon BV
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 Stamicarbon BV filed Critical Stamicarbon BV
Publication of GB1256416A publication Critical patent/GB1256416A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C07D223/12—Nitrogen atoms not forming part of a nitro radical

Landscapes

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

Abstract

1,256,416. Aminocaprolactam hydrochloride; lysine. STAMICARBON N.V. 9 May, 1969 [14 May, 1968], No. 23827/69. Heading C2C. α - Amino - # - caprolactam monohydrochloride of enhanced optical purity is obtained from the relatively optically impure salt by (1) subjecting the relatively impure monohydrochloride to fractional crystallization arid recovering the pure salt as crystals or (2) subjecting the impure monohydrochloride to extraction with a solvent whereby the pure salt remains as a solid after extraction. Specified solvents for both processes are water and aqueous ethanol and methanol. Crystallization and extraction are conducted at 15-65‹ C. when water is used. Examples describe the recovery of the pure L- and D-salts. The L-salt may be hydrolysed to L-lysine.
GB2382769A 1968-05-14 1969-05-09 RECOVERY OF alpha-AMINO-epsilon-CAPROLACTAM MONOHYDROCHLORIDE OF ENHANCED OPTICAL PURITY Expired GB1256416A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6806784A NL6806784A (en) 1968-05-14 1968-05-14

Publications (1)

Publication Number Publication Date
GB1256416A true GB1256416A (en) 1971-12-08

Family

ID=19803621

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2382769A Expired GB1256416A (en) 1968-05-14 1969-05-09 RECOVERY OF alpha-AMINO-epsilon-CAPROLACTAM MONOHYDROCHLORIDE OF ENHANCED OPTICAL PURITY

Country Status (4)

Country Link
BE (1) BE732730A (en)
FR (1) FR2008511A1 (en)
GB (1) GB1256416A (en)
NL (1) NL6806784A (en)

Also Published As

Publication number Publication date
FR2008511A1 (en) 1970-01-23
NL6806784A (en) 1969-11-18
BE732730A (en) 1969-11-10

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