反应详情

5-amino-2,4,6-triiodoisophthalic acid dichloride of formula (2) is used as a starting material. The compound of formula (2) is reacted with methoxyacetyl chloride in dimethylacetamide solvent to produce 5-methoxyacetylamino-2,4,6-triiodoisophthalic acid dichloride of formula (3) which is then used without an additional purification procedure for the next step. The compound of formula (3) is reacted with 2,3-dihydroxypropylamine in dimethylacetamide solvent in the presence of triethylamine to form 5-methoxyacetylamino-2,4,6-triiodoisophthalic acid (2,3-dihydroxypropyl)amide chloride of formula (4), as shown in the following reaction scheme 6.