反应详情

To ethyl 2-(3-(4-cyanophenyl)pyridin-4-ylthio)-2-methylpropanoate (step C, 49 mg, 0.15 mmol) was added methanol (0.8 mL), and sodium hydroxide (2 M aqueous, 0.8 mL). The resulting mixture was stirred at ambient temperature for 2 hours. The volume was reduced (˜0.8 mL) by rotary evaporation. To the residue was added HCl (6 N aqueous) with stirring until pH reached 6, resulting in the formation of a white precipitate, which was isolated by filtration. The solid was washed with water (6×1 mL), air dried for 1 hour and dried under vacuum (P2O5) overnight to yield a white powder (28 mg, 64%).

1. customby rotary evaporation
2. additionTo the residue was added HCl (6 N aqueous)
3. stirringwith stirring until pH
4. customresulting in the formation of a white precipitate
5. customwhich was isolated by filtration
6. washThe solid was washed with water (6×1 mL), air
7. customdried for 1 hour
8. dry with materialdried under vacuum (P2O5) overnight