反应详情

The wet Bosentan was dissolved in ethanol (4.4 lit) at 50° C. to 55° C. and decolorized with activated charcoal. The solution was heated at 50° C. to 55° C. To this solution, water (4.4 lit) was added and was stirred for 20 min. The solution was cooled to 25° C. to 30° C. and was maintained at same temperature for 60 min. The crystalline solid obtained was filtered, washed with chilled ethanol, and dried under vacuum (650-700 mm/Hg) at 35° C. to 40° C. to afford 2.20 kg [68.7% yield] of Bosentan monohydrate as a white crystalline solid.

1. temperatureThe solution was heated at 50° C. to 55° C
2. temperatureThe solution was cooled to 25° C. to 30° C.
3. temperaturewas maintained at same temperature for 60 min
4. customThe crystalline solid obtained
5. filtrationwas filtered
6. washwashed with chilled ethanol
7. customdried under vacuum (650-700 mm/Hg) at 35° C. to 40° C.