1,3-Dichloroacetone → 1-(4-(chloromethyl)thiazol-2-yl)-N,N-dimethylmethanamine hydrochloride

To a 500 ml. flask were added 260 ml. of 1,2-dichloroethane, 52.7 g. of dimethylaminothioacetamide, hydrochloride, 48.2 g. of 1,3-dichloropropanone and 63 g. of sodium bicarbonate. The mixture was stirred overnight, and was filtered. The filter cake was washed with 250 ml. of 1,2-dichloroethane, and the combined filtrates were added to a 1000 ml. flask and cooled in an ice bath. To it was added dropwise 30.7 ml. of sulfuryl chloride. The mixture was seeded with crystals of authentic product, and the mixture was allowed to warm to 30° and was stirred for 30 minutes after the addition was complete. It was then heated to 60° and stirred for 30 minutes more, and cooled to ambient temperature. It was then filtered, the filter cake was washed with 100 ml. of 1,2-dichloroethane, and it was blown dry with nitrogen. The solids were then dried under vacuum at 45° to obtain 75.3 g. of the desired product. The product was confirmed to be substantially identical to that of Example 5 by tlc analysis, using the system described above.

1. additionflask were added 260 ml
2. filtrationwas filtered
3. washThe filter cake was washed with 250 ml
4. additionof 1,2-dichloroethane, and the combined filtrates were added to a 1000 ml
5. temperatureflask and cooled in an ice bath
6. additionTo it was added dropwise 30.7 ml
7. temperatureto warm to 30°
8. stirringwas stirred for 30 minutes
9. additionafter the addition
10. temperatureIt was then heated to 60°
11. stirringstirred for 30 minutes more
12. filtrationIt was then filtered
13. washthe filter cake was washed with 100 ml
14. dry with materialof 1,2-dichloroethane, and it was blown dry with nitrogen
15. customThe solids were then dried under vacuum at 45°
16. customto obtain 75.3 g

ORD record

ord-6eed6121d0694f73ad7132ff1a604444

Source dataset

uspto-grants-1984_08

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04468517