反应详情

To 175 mL of dry N,N-dimethylformamide (DMF) was added 63.6 g (0.100 mol) sodium diatrizoate and 14.7 g (0.120 mol) of ethylchloroacetate and the mixture was heated on a steam bath for 6 hr. The reaction was filtered while hot and the filtrate cooled to room temperature and diluted to 500 ml with water. The mixture was cooled and filtered and the collected solid washed with water. The solid was then dissolved in 350 ml hot DMF, filtered and added to an equal volume of water. The mixture was cooled, filtered, washed with water, and the solid dried at 100° C. overnight to afford 53.0 g (76% yield) of a white powder, mp 269.5°-270.5° C.

1. temperaturethe mixture was heated on a steam bath for 6 hr
2. filtrationThe reaction was filtered while hot and the filtrate
3. additiondiluted to 500 ml with water
4. temperatureThe mixture was cooled
5. filtrationfiltered
6. washthe collected solid washed with water
7. dissolutionThe solid was then dissolved in 350 ml hot DMF
8. filtrationfiltered
9. additionadded to an equal volume of water
10. temperatureThe mixture was cooled
11. filtrationfiltered
12. washwashed with water
13. customthe solid dried at 100° C. overnight