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    • 6. 发明授权
    • Preparation of saccharin
    • 糖精的制备
    • US4464537A
    • 1984-08-07
    • US320333
    • 1981-11-12
    • Peter TonneHagen Jaedicke
    • Peter TonneHagen Jaedicke
    • C07D275/06
    • C07D275/06
    • A process for the preparation of saccharin by reacting an aqueous hydrochloric acid solution of o-methoxycarbonylbenzenediazonium chloride with sulfur dioxide, wherein(a) the aqueous diazonium salt solution is reacted with sulfur dioxide at from 0.degree. to 100.degree. C. in the presence of a water-immiscible or only partially water-miscible inert organic solvent,(b) in order to decompose the diazonium salt, the reaction mixture is treated simultaneously or subsequently with a diazonium salt decomposition catalyst,(c) the aqueous organic reaction mixture, or the organic phase obtained after removing the aqueous phase, is treated with an oxidizing agent at from 0.degree. to 100.degree. C. and(d) the organic phase is reacted with aqueous ammonia at from 0.degree. to 50.degree. C. and the saccharin is isolated from the aqueous phase in a conventional manner by acidifying with a strong acid.
    • 通过使邻甲氧基羰基苯并重氮盐酸盐水溶液与二氧化硫反应来制备糖精的方法,其中(a)重氮盐水溶液与二氧化硫在0℃至100℃下,在 (b)为了分解重氮盐,将反应混合物同时或随后用重氮盐分解催化剂处理,或(c)含水有机反应混合物,或 除去水相后得到的有机相用0〜100℃的氧化剂处理。