申请人:Pillai Bijukumar Gopinathan
公开号:US10774055B2
公开(公告)日:2020-09-15
A process for preparing, 1,1,3-trioxo-1,2-benzothiazole-6-carboxamide of formula (I) comprising: (a) oxidizing 2,5-dimethyl-benzenesulfonamide of formula (II) in the presence of an oxidizing agent to receive 2-sulfamoyl-terephthalic acid of formula (III); (b) converting the formed 2-sulfamoyl-terephthalic acid of formula (III) to receive 2-sulfamoyl-terephthalic acid derivative of formula (IV); and (c) reacting the resulting 2-sulfamoyl-terephthalic acid derivative of formula (IV) with ammonia (NH3) or ammonium containing-salt; wherein R represents OR′ or CI and R′ represents a branched or non-branched C1-C12 alkyl.
一种制备式(I)的 1,1,3-三氧代-1,2-苯并噻唑-6-甲酰胺的工艺,包括(a) 在氧化剂存在下氧化式(II)的 2,5-二甲基苯磺酰胺,得到式(III)的 2-氨基磺酰基对苯二甲酸; (b) 将形成的式(III)的 2-氨基磺酰基对苯二甲酸转化为式(IV)的 2-氨基磺酰基对苯二甲酸衍生物;(c) 将生成的式(IV)2-氨基磺酰基对苯二甲酸衍生物与氨(NH3)或含铵的盐反应;其中 R 代表 OR′或 CI,R′代表支链或未支链的 C1-C12 烷基。