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    LATENT CATALYST SYSTEMS AND PROCESSES FOR THE PRODUCTION OF POLYAMIDES
    1.
    发明公开
    LATENT CATALYST SYSTEMS AND PROCESSES FOR THE PRODUCTION OF POLYAMIDES 审中-公开

    公开(公告)号：EP3892668A1

    公开(公告)日：2021-10-13

    申请号：EP20168531.0

    申请日：2020-04-07

    申请人： Universität Stuttgart

    发明人： Buchmeiser, Michael ,  Elser, Iris ,  Altmann, Hagen ,  Benedikter, Mathis ,  Naumann, Stefan

    IPC分类号： C08G69/20 ,  C07D263/08 ,  C07D263/32

    摘要： The invention concerns catalysts systems for the preparation of polyamides, in particular from lactam precursors, which comprise (i) a lactam activator (A) with increased electron deficiency at the intracyclic carbonyl carbon or precursors for the in-situ formation thereof and/or a Lewis acid (L) and (ii) a N-heterocyclic carbene. Corresponding catalysts systems provide for a latent polymerization activity towards lactams, which allows the formation of unreactive catalyst system/monomer mixtures, which can be polymerized by heating the mixture above an activation temperature. In addition, the inventive catalyst systems provide for fast reaction times at comparatively low temperatures and a high monomer conversion. The present invention further concerns processes for the production of polyamides, which employ such catalyst systems, polymerization systems comprising such catalyst systems and polyamide monomers and corresponding polyamides prepared from such process.

    LATENT CATALYST SYSTEMS AND PROCESSES FOR THE PRODUCTION OF POLYAMIDES
    5.
    发明公开
    LATENT CATALYST SYSTEMS AND PROCESSES FOR THE PRODUCTION OF POLYAMIDES 审中-公开

    公开(公告)号：EP3896111A1

    公开(公告)日：2021-10-20

    申请号：EP21167254.8

    申请日：2021-04-07

    申请人： Universität Stuttgart

    发明人： Buchmeiser, Michael ,  Elser, Iris ,  Altmann, Hagen ,  Benedikter, Mathis ,  Naumann, Stefan

    IPC分类号： C08G69/20 ,  C07D263/08 ,  C07D263/32

    摘要： The invention concerns catalysts systems for the preparation of polyamides, in particular from lactam precursors, which comprise (i) a lactam activator (A) with increased electron deficiency at the intracyclic carbonyl carbon or precursors for the in-situ formation thereof and/or a Lewis acid (L) and (ii) a N-heterocyclic carbene. Corresponding catalysts systems provide for a latent polymerization activity towards lactams, which allows the formation of unreactive catalyst system/monomer mixtures, which can be polymerized by heating the mixture above an activation temperature. In addition, the inventive catalyst systems provide for fast reaction times at comparatively low temperatures and a high monomer conversion. The present invention further concerns processes for the production of polyamides, which employ such catalyst systems, polymerization systems comprising such catalyst systems and polyamide monomers and corresponding polyamides prepared from such process.

    1,4-DISUBSTITUTED PIPERAZINES
    8.
    发明授权
    1,4-DISUBSTITUTED PIPERAZINES 失效
    1,4-二取代哌嗪

    公开(公告)号：EP0541617B1

    公开(公告)日：1997-06-04

    申请号：EP91913695.2

    申请日：1991-07-15

    申请人： NOVO NORDISK A/S

    发明人： HOHLWEG, Rolf ,  GUDDAL, Erling ,  NIELSEN, Erik, Bardrum

    IPC分类号： C07D295/08 ,  C07D261/06 ,  C07D263/08 ,  C07D271/06 ,  C07D333/06

    CPC分类号： C07D263/10 ,  C07D261/08 ,  C07D271/06 ,  C07D295/084 ,  C07D295/088 ,  C07D295/15 ,  C07D333/20 ,  C07D333/22 ,  C07F9/650958

    摘要： A disubstituted piperazine compound having formula (I) wherein R1 is halogen, methoxy, C¿1-6?-alkyl or trifluoromethyl, and R?2¿ is methyl or substituted C¿1-8?-alkyl, C3-8-alkenyl or C3-8-cycloalkyl, where substituents may be hydroxy-, keto- or oximino-groups in any position leading to a stable tertiary amine; or R?2¿ is a straight or branched C¿1-8?-alkyl or C3-8-alkenyl, which in any position may be substituted as above, but is terminally substituted with one of the following groups: cyano, optionally C1-4-alkoxy-substituted C1-4-alkoxy, dimethoxy, optionally substituted phenoxy, phosphonic acid, thienyl, furyl, oxazoline, isoxazole, oxadiazole, where the optional substitution is represented by C1-6-alkyl or phenyl, provided that when cyano is the only substituent in R?2, R2¿ must contain at least four carbon atoms, and pharmaceutically acceptable acid addition salts thereof. The compounds are useful in the treatment of mental disorders in which a dopaminergic deficit is implicated.