反应详情

温度

17.5 °C

To a solution of tert-butyl 2-{2-[1-ethyl-3-(4-trifluoromethoxy-phenyl)-ureido]-indan-5-ylsulfanyl}-2-methyl-propionate (288 g, 0.534 mol) was added a solution of sulfuric acid (535 g, 5.34 mol) in isopropyl acetate (0.7 L) while maintaining the reaction temperature at about 15-20° C. The clear solution was stirred at 15° C. for 1 hour after the addition. To the reaction mixture was added cold water (0.94 L). After removal of the acidic aqueous layer, the isopropyl acetate layer was washed until the pH of the aqueous layer reached 3. The solution was used in the next step without isolation.

1. additionafter the addition
2. customAfter removal of the acidic aqueous layer
3. washthe isopropyl acetate layer was washed until the pH of the aqueous layer