反应详情

The reaction vessel is charged with 5.0 g Midodrine base and 60 ml ethanol. The mixture is heated to reflux to obtain a clear solution. To the hot mixture is added 6.3 ml of a 22% solution of hydrochloric acid in isopropanol in portions. During the addition, the Midodrine HCl will crystallize from solution. After cooling to 5°-10° C., the product is filtered to afford 4.8 g (96% yield) of Midodrine HCl (m.p.: 200.8°-201.8° C.).

1. temperatureThe mixture is heated
2. temperatureto reflux
3. customto obtain a clear solution
4. additionDuring the addition
5. customthe Midodrine HCl will crystallize from solution
6. temperatureAfter cooling to 5°-10° C.
7. filtrationthe product is filtered