反应详情

Five g. of 4-chloromethyl-4-hydroxy-2-dimethylaminomethyl-2-thiazoline was added to 25 ml. of 1,2-dichloroethane, and 2.1 g. of sulfuryl chloride in 10 ml. of 1,2-dichloroethane was added. An exothermic reaction heated the mixture to 35° as soon as the addition began, so the mixture was cooled while the addition was made. The mixture was then stirred at ambient temperature for 1 hour, and was then heated to 42° for a short time. A 2-phase mixture formed, and the oily portion was removed and dissolved in 10 ml. of methanol. The methanol was removed under vacuum, and the residue was partially dissolved in 10 ml. of methanol, and then precipitated by addition of 25 ml. of ethyl acetate. The mixture was then cooled in the freezer, and the crystals were filtered off, washed with ethyl acetate and dried under vacuum at 30° to obtain 1.4 g. of the desired product, which was identified by nmr analysis as being substantially identical with the product of Example 5.

1. customAn exothermic reaction
2. temperatureheated the mixture to 35° as
3. additionsoon as the addition
4. temperaturewas cooled while the addition
5. temperaturewas then heated to 42° for a short time
6. customA 2-phase mixture formed
7. customthe oily portion was removed
8. dissolutiondissolved in 10 ml
9. customThe methanol was removed under vacuum
10. dissolutionthe residue was partially dissolved in 10 ml
11. customof methanol, and then precipitated by addition of 25 ml
12. temperatureThe mixture was then cooled in the freezer
13. filtrationthe crystals were filtered off
14. washwashed with ethyl acetate
15. customdried under vacuum at 30°
16. customto obtain 1.4 g