Preparation of 2-chloro-azacyclo-2.3-alkene-n-carbochlorides

    公开(公告)号:GB902390A

    公开(公告)日:1962-08-01

    申请号:GB836961

    申请日:1961-03-07

    Applicant: STAMICARBON

    Abstract: The invention comprises 2-chloro-azacyclo-2,3 - hexene - N - carbochloride and 2-chloro-azacyclo-2,3-octene-N-carbochloride and their preparation by reacting in the liquid phase phosgene with d -valerolactam and #z-enantholactam, respectively, the lactam reactant being used (1) as such, and while ensuring that at all or substantially all times during the reaction there is an excess of the phosgene over the stoichiometric amount (i.e., a molar ratio of phosgene to lactam of more than 2 : 1), or (2) as the hydrochloric acid salt. Specification 901,169 also is referred to.

    2.
    发明专利
    未知

    公开(公告)号:DE2360406A1

    公开(公告)日:1974-06-12

    申请号:DE2360406

    申请日:1973-12-04

    Applicant: STAMICARBON

    Abstract: A beta-alkoxy-omega-lactam is prepared by subjecting to heating in the liquid phase an omega-amino-beta-alkoxy-carboxylic acid ester. The heating may be carried out at a temperature of 150 DEG to 350 DEG C. If the amino compound is prepared by hydrogenation of the corresponding cyano compound, it is not necessary to separate the amino compound from the reaction mixture. The lactams obtained may be applied for preparation of polyamides and copolyamides.

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