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    • 3. 发明授权
    • Preparation of tri-iodo benzene compounds
    • 三碘苯化合物的制备
    • US06274762B1
    • 2001-08-14
    • US09432632
    • 1999-11-12
    • Dick Malthe-SorenssenOle Magne HomestadBritt Sterud
    • Dick Malthe-SorenssenOle Magne HomestadBritt Sterud
    • C07C22938
    • C07C227/14C07C231/12C07C229/62C07C237/46
    • The invention provides an improved process for the preparation of a compound containing a 2,4,6-triiodinated benzene ring, said process comprising reacting a 2,4,6-unsubstituted 5-amino-benzoic acid or derivative there of with an iodine halide iodinating agent in an aqueous reaction medium, characterised in that the iodinating agent is added to an aqueous medium containing the 5-amino-benzoic acid or derivative at two different temperature ranges: (A) one or more primary portions of the agent are added at a temperature in the range 40 to 70° C. and then one or more secondary portions of the agent are added at a temperature in the range 75 to 95° C. or (B) one or more primary portions of the agent are added at a temperature in the range 75 to 95° C. and then one or more secondary portions of the agent are added at a temperature of 60 to 70° C.
    • 本发明提供了制备含有2,4,6-三碘化苯环的化合物的改进方法,所述方法包括使2,4,6-未取代的5-氨基 - 苯甲酸或其衍生物与碘卤化物 碘化剂在水性反应介质中,其特征在于将碘化剂加入到含有5-氨基 - 苯甲酸或衍生物的水性介质中,其两个不同的温度范围:(A)将试剂的一个或多个主要部分加入 在40至70℃范围内的温度,然后在75至95℃的温度下加入试剂的一个或多个次级部分,或(B)将试剂的一个或多个主要部分加入 温度在75至95℃的范围内,然后在60至70℃的温度下加入试剂的一个或多个次级部分。