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    • 4. 发明授权
    • X-ray contrast agent
    • X射线造影剂
    • US3226431A
    • 1965-12-28
    • US11064761
    • 1961-05-17
    • BRACCO IND CHIMICA SPA
    • ERNST FELDERDAVIDE PITRE
    • A61K49/04
    • A61K49/0433A61K49/0452A61K49/0495
    • The invention comprises a -(acetylamino-2, 4, 6-triiodophenoxy)-caproic acid and non-toxic metal and amine salts thereof and the ethyl ester thereof; and their preparation by iodizing 3-acetylaminophenol with an excess of iodine chloride and condensing the 3-acetylamino-2, 4, 6-triiodophenol so obtained with a reactive acid ester of a -hydroxycaproic acid or a low alkyl ester thereof, and if necessary saponifying the product. The iodizing agent is advantageously used in the complex form as the alkali metal iodine dichloride, and the reactive ester is preferably derived from a hydrohalic, methanesulphonic or p-toluenesulphonic acid. Examples are given, 3-acetylamino-4, 6-diiodophenol formed as a by-product in the first stage of the process being removed as its sodium salt. Salts with sodium and N-methyl-glucamine are described.ALSO:X-ray contrast agents comprise a -(3-acetyl-amino - 2,4,6 - triiodophenoxy) - caproic acid or a non-toxic alkali metal or amine salt thereof, and a carrier. Tablets, capsules, granulates, solutions and suspensions, which may contain flavouring agents, are referred to. The sodium and N-methyl-glucamine salts are especially preferred.