反应详情

4,2 g of (±)-2-amino-6-propylamino-4,5,6,7-tetrahydrobenzthiazole was dissolved in 15 mL of hot methanol and 1.65 mL of 36% hydrochloric acid was added. The obtained suspension was stirred, cooled and precipitated solid was filtered off. The cake was washed with cold methanol and air-dried to give 4.2 g of product with m.p. 273-282° C.

1. temperaturecooled
2. customprecipitated solid
3. filtrationwas filtered off
4. washThe cake was washed with cold methanol
5. customair-dried