反应详情

Chloromethylpivalate (7.62 g, 50.6 mmol) in dry DMF (84 ml) is added dropwise at 50° C. to a solution of potassium 5-(N-acetylamino)-3-(methylaminocarbonyl)-2,4,6-triiodobenzenecarboxylate (30.00 g, 46.0 mmol) and sodium iodide (0.37 g, 2.5 mmol) in dry DMF (450 ml). The precipitate is removed by filtration after stirring for 4 hours and the solvent is removed at reduced pressure. The residue is triturated and washed repeatedly in water and finally recrystallised from isopropanol.

1. customThe precipitate is removed by filtration
2. customthe solvent is removed at reduced pressure
3. customThe residue is triturated
4. washwashed repeatedly in water
5. customfinally recrystallised from isopropanol