反应详情

温度

10 °C

1-(4-chloro-3-methanesulfonyl-phenyl)-propan-2-one (32b) (0.23 g, 1 mmol) is dissolved in dioxan (10 ml) and the solution is cooled to 10° C. at which point the mixture is semi-frozen. Bromine (0.045 ml, 0.8 mmol, 0.8 eq.) is added slowly and the mixture is stirred for an additional 15 minutes in a semi frozen state. The mixture is then allowed to warm to room temperature and the solvent is removed to give a brown oil containing starting material and 1-bromo-1-(3-fluoro-4-methanesulfonyl-phenyl)-propan-2-one. This material is dissolved in ethanol (10 ml). (6-Methoxy-pyridine-3-yl)-thiourea (0.183 g, 1 mmol) is added in one portion. The mixture is stirred at 60° C. for 30 minutes then allowed to cool whereupon the product crystallised. Filtration affords the titled compound as a white solid.

1. temperaturefrozen state
2. temperatureto warm to room temperature
3. customthe solvent is removed
4. customto give a brown oil
5. additioncontaining
6. stirringThe mixture is stirred at 60° C. for 30 minutes
7. temperatureto cool whereupon the product
8. customcrystallised
9. filtrationFiltration