5-(N-2,3-Diacetoxypropylacetamido)-2,4,6-triiodo-N-methylisophthalamic acid chloride 、
trans-2,2-Dimethyl-6-hydroxy-5-amino-1,3-dioxepane 在
三甲胺 作用下,
以
异丁酰胺 、
乙酸乙酯 为溶剂,
生成 5-(N-2,3-Diacetoxypropylacetamido)-2,4,6-triiodo-N-(trans-2,2-dimethyl-6-hydroxy-1,3-dioxepan-5-yl)-N'-methylisophthalamide