- METHOD FOR ACETYLATING 5-AMINO-2,4,6-TRIIODOISOPHTHALIC ACID DERIVATIVE
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A method for producing a 5-acetamide-2,4,6-triiodoisophthalic acid derivative comprising acetylating a 5-amino-2,4,6-triiodoisophthalic acid derivative in an organic solvent in the presence of an acid catalyst using acetic anhydride is disclosed. By the convenient method, a 5-acetamide-2,4,6-triiodoisophthalic acid derivative with a high yield and high quality can be provided.
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Page/Page column 5
(2008/06/13)
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- Polyiodinated aroyloxy esters
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Compounds having the structure STR1 wherein Z--COO)m is the residue of a polyiodinated aromatic acid; m is 1, 2, 3 or 4; n is an integer from 1 to 20; R1 and R2 are independently H, alkyl, fluoroalkyl, cycloalkyl, aryl, aralkyl, alkoxy or aryloxy; R3 and R4 are independently H, alkyl, fluoroalkyl, cycloalkyl, aryl, aralkyl, alkoxy, aryloxy, halogen, hydroxy or acylamino; and R5 is H, alkyl, cycloalkyl, aryl, aralkyl, alkoxyalkyl or acetamidoalkyl; are useful as contrast agents in x-ray imaging compositions and methods.
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