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    PROCESS FOR PREPARING NON-TOXIC SALTS OF 6-METHYL-3,4-DIHYDRO -1,2,3-OXATHIAZIN-4-ONE-2,2-DIOXIDE AND APPARATUS FOR MAKING THE SAME
    2.
    发明专利
    PROCESS FOR PREPARING NON-TOXIC SALTS OF 6-METHYL-3,4-DIHYDRO -1,2,3-OXATHIAZIN-4-ONE-2,2-DIOXIDE AND APPARATUS FOR MAKING THE SAME 未知

    公开(公告)号：CZ227894A3

    公开(公告)日：1995-07-12

    申请号：CZ227894

    申请日：1993-03-16

    Applicant: HOECHST AG

    Inventor： ROSCHER GUNTER ,  LITTERER HEINZ ,  ENGELMANN AXEL ,  KAUFMANN WOLF-DIETMAR ,  LAUGWITZ BERND ,  SCHNABEL HANS-DIETMAR

    IPC: C07D291/06

    Abstract: PCT No. PCT/EP93/00606 Sec. 371 Date Jun. 19, 1995 Sec. 102(e) Date Jun. 19, 1995 PCT Filed Mar. 16, 1993 PCT Pub. No. WO93/19055 PCT Pub. Date Sep. 30, 1993The invention relates to a process for the preparation of acesulfam salts by reaction of salts of amidosulfonic acid with diketene to give a salt of acetoacetamidosulfonic acid (I), ring closure by the action of at least about an equivalent amount of SO3, at least this ring closure reaction being carried out in the presence of a halogenated, aliphatic hydrocarbon as an inert solvent, treatment of the cyclization product with water and conversion of the resulting acesulfam-H (II) into the form of a non-toxic salt, which comprises, in the work-up by distillation of the resulting crude solvent, after removal of water and low-boilers and recovery of solvent sufficiently pure for reuse in the preparation of compounds (I) and/or (II), directly returning :he remaining, solvent-containing distillation residue, without further purification, into the system downstream of the reaction vessel for carrying out the ring closure reaction.

    PROCESS AND DEVICE FOR PREPARING THE NON-TOXIC SALTS OF 6-METHYL-3,4-DIHYDRO-1,2,3-OXATHIAZIN-4íON-2,2-DIOXIDE
    3.
    发明专利
    PROCESS AND DEVICE FOR PREPARING THE NON-TOXIC SALTS OF 6-METHYL-3,4-DIHYDRO-1,2,3-OXATHIAZIN-4íON-2,2-DIOXIDE 未知

    公开(公告)号：HU9402643D0

    公开(公告)日：1994-12-28

    申请号：HU9402643

    申请日：1993-03-16

    Applicant: HOECHST AG

    Inventor： LITTERER HEINZ ,  SCHNABEL HANS-DIETMAR ,  LAUGWITZ BERND ,  ROSCHER GUENTER ,  ENGELMANN AXEL ,  KAUFMANN WOLF-DIETMAR

    IPC: C07D291/06

    Abstract: PCT No. PCT/EP93/00606 Sec. 371 Date Jun. 19, 1995 Sec. 102(e) Date Jun. 19, 1995 PCT Filed Mar. 16, 1993 PCT Pub. No. WO93/19055 PCT Pub. Date Sep. 30, 1993The invention relates to a process for the preparation of acesulfam salts by reaction of salts of amidosulfonic acid with diketene to give a salt of acetoacetamidosulfonic acid (I), ring closure by the action of at least about an equivalent amount of SO3, at least this ring closure reaction being carried out in the presence of a halogenated, aliphatic hydrocarbon as an inert solvent, treatment of the cyclization product with water and conversion of the resulting acesulfam-H (II) into the form of a non-toxic salt, which comprises, in the work-up by distillation of the resulting crude solvent, after removal of water and low-boilers and recovery of solvent sufficiently pure for reuse in the preparation of compounds (I) and/or (II), directly returning :he remaining, solvent-containing distillation residue, without further purification, into the system downstream of the reaction vessel for carrying out the ring closure reaction.

    PROCESS AND DEVICE FOR PREPARING THE NON-TOXIC SALTS OF 6-METHYL-3,4-DIHYDRO-1,2,3-OXATHIAZIN-4-ON-2,2-DIOXIDE
    8.
    发明专利
    PROCESS AND DEVICE FOR PREPARING THE NON-TOXIC SALTS OF 6-METHYL-3,4-DIHYDRO-1,2,3-OXATHIAZIN-4-ON-2,2-DIOXIDE 未知

    公开(公告)号：HU216294B

    公开(公告)日：1999-06-28

    申请号：HU9402643

    申请日：1993-03-16

    Applicant: HOECHST AG

    Inventor： ENGELMANN AXEL ,  KAUFMANN WOLF-DIETMAR ,  LAUGWITZ BERND ,  LITTERER HEINZ ,  ROSCHER GUENTER ,  SCHNABEL HANS-DIETMAR

    IPC: C07D291/06

    Abstract: PCT No. PCT/EP93/00606 Sec. 371 Date Jun. 19, 1995 Sec. 102(e) Date Jun. 19, 1995 PCT Filed Mar. 16, 1993 PCT Pub. No. WO93/19055 PCT Pub. Date Sep. 30, 1993The invention relates to a process for the preparation of acesulfam salts by reaction of salts of amidosulfonic acid with diketene to give a salt of acetoacetamidosulfonic acid (I), ring closure by the action of at least about an equivalent amount of SO3, at least this ring closure reaction being carried out in the presence of a halogenated, aliphatic hydrocarbon as an inert solvent, treatment of the cyclization product with water and conversion of the resulting acesulfam-H (II) into the form of a non-toxic salt, which comprises, in the work-up by distillation of the resulting crude solvent, after removal of water and low-boilers and recovery of solvent sufficiently pure for reuse in the preparation of compounds (I) and/or (II), directly returning :he remaining, solvent-containing distillation residue, without further purification, into the system downstream of the reaction vessel for carrying out the ring closure reaction.

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