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    • 3. 发明申请
    • CYCLIZATION PROCESS FOR SUBSTITUTED BENZOTHIAZOLE DERIVATIVES
    • 取代的苯并噻唑衍生物的循环过程
    • WO2004060879A3
    • 2004-11-18
    • PCT/EP0314928
    • 2003-12-29
    • HOFFMANN LA ROCHE
    • SPURR PAUL
    • C07D277/82C07D277/84C07D417/04C07D417/12
    • C07D277/82
    • The present invention relates to a process for preparation of amino substituted benzothiazole derivatives of formula (I), wherein R , R and R are independently from each other hydrogen, lower alkyl, lower alkoxy or halogen; R is hydrogen, lower alkyl, lower alkyloxy, halogen, or is a five or six membered non aromatic heterocyclyl group, unsubstituted or substituted by lower alkyl or an oxo-group, or is -NR R wherein R and R are independently from each other hydrogen, lower alkyl, -C(O)-lower alkyl, -(CH2)nO-lower alkyl or benzyl, opionally substituted by lower alkyl, or is an five or six membered heteroaryl group; R and R or R and R may form together with the corresponding carbon atoms a ring containing -O-CH2-O- or -CH=CH-CH=CH-; R is hydrogen or -C(O)R'; R' is a five or six membered non aromatic heterocyclyl group, five or six membered heteroaryl group or is aryl, which rings may be substituted by the groups, selected from lower alkyl, halogen-lower alkyl, lower alkoxy, cyano, nitro, -C(O)H, -C(O)OH or by pyrrolidin-1-yl-methyl; n is 1 to 4; and to their pharmaceutically acceptable salts, wherein the cyclization is carried out by the treatment of a compound of formula with sulphoxide/HBr/solvent to give the desired products of formula (I) for R is hydrogen (formula IA) and for R is -C(O)R' (formula IB).
    • 本发明涉及制备式(I)的氨基取代的苯并噻唑衍生物的方法,其中R 1,R 2和R 3彼此独立地为氢,低级烷基,低级烷氧基或卤素; R 4是氢,低级烷基,低级烷氧基,卤素或是未取代的或被低级烷基或氧代基取代的或五或六元非芳族杂环基,或者是-NR 5 R 6, 其中R 5和R 6彼此独立地为氢,低级烷基,-C(O) - 低级烷基, - (CH 2)n O-低级烷基或苄基,其被低级烷基经opionally取代,或者是五 或六元杂芳基; R 1和R 2或R 2和R 3可以与相应的碳原子一起形成含有-O-CH 2 -O-或-CH = CH-CH = CH-的环; R是氢或-C(O)R'; R'为五元或六元非芳族杂环基,五元或六元杂芳基或芳基,所述环可以被选自低级烷基,卤素 - 低级烷基,低级烷氧基,氰基,硝基, - C(O)H,-C(O)OH或吡咯烷-1-基 - 甲基; n是1至4; 和其药学上可接受的盐,其中环化通过用亚砜/ HBr /溶剂处理式(III)化合物进行,得到式(I)所需产物,其中R为氢(式IA),R为 - C(O)R'(式IB)。