反应详情

温度

50 °C

The product of Step 1 (60.5 g, 251 mmol) was diluted with DMF (365 mL). N-bromosuccinimide (49.1 g, 276 mmol) was added, and the solution was heated to 50° C. and stirred for 2 h. The reaction was removed from heat and cooled to 45° C. and H2O (600 mL) containing 15.8 g Na2SO3 was added dropwise affording a solid. The mixture was stirred at room temperature for 1 h, then filtered and washed 2× with H2O (300 mL). The cake was dried overnight under a nitrogen bag to afford 8-(5-bromo-1,3-thiazol-2-yl)-1,4-dioxaspiro[4.5]decan-8-ol (68.2 g; 85%) as a white solid.

1. customThe reaction was removed
2. temperaturefrom heat
3. temperaturecooled to 45° C.
4. additionH2O (600 mL) containing 15.8 g Na2SO3
5. additionwas added dropwise
6. customaffording a solid
7. stirringThe mixture was stirred at room temperature for 1 h
8. filtrationfiltered
9. washwashed 2× with H2O (300 mL)
10. customThe cake was dried overnight under a nitrogen bag