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    PROCESS FOR PREPARING 2,1,3-THIADIAZIN-4-ONE-2,2-DIOXIDE
    1.
    发明授权
    PROCESS FOR PREPARING 2,1,3-THIADIAZIN-4-ONE-2,2-DIOXIDE 失效

    公开(公告)号：KR810001008B1

    公开(公告)日：1981-08-29

    申请号：KR780000595

    申请日：1978-03-08

    Applicant: BASF AG

    Inventor： MUELLER ALBRECHT ,  MERKLE H ,  ZOLLER K

    IPC: C07D513/04

    Abstract: Title compd. (I; R1,R2,R3 = H, unsubstituted aliphatic group, cycloaromatic group, halogen, alkyl, alkoxy, haloalkoxy, alkylsulfonyl, dialkylamidosulfonyl substituted aliphatic group, cyclo aliphatic group; R1 = dialkylamino; R3 = halogen, trifluoromethyl; R4 = H, alkyl; Y = -CH=, -N= ), useful for protecting corps, were prepd. by cyclization of sulfamates(III) with acid halide or acid anhydride. The sulfamates was prepd. by reacting aminopyridine carboxyamide derives. (II) with SO3, sulfonic chloride or additive of SO3 and organic base in the presence of organic base.

    6.
    发明专利
    未知

    公开(公告)号：NO314305B1

    公开(公告)日：2003-03-03

    申请号：NO20000787

    申请日：2000-02-17

    Applicant: BASF AG

    Inventor： MERKLE HANS RUPERT ,  WOERZ OTTO ,  FRETSCHNER ERICH ,  HANSEN HANSPETER ,  MUELLER ALBRECHT ,  BENZ KURT

    IPC: C07D285/24 ,  C07D285/16

    Abstract: A process for preparing 3-isopropyl-1H-2,1,3-benzothiadiazin-4 (3H)-one 2,2-dioxide (I) or a salt of Iwhich comprises reacting anthranilic isopropylamide IIsimultaneously with sulfur trioxide or chlorosulfonic acid in the presence of an organic base or with adducts of sulfur trioxide and organic basesandphosphorus oxychloride at from 50° C. to the reflux temperature, followed, if appropriate, by conversion into its salts, is described.

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