反应详情

温度

-78 °C

To a stirred solution of 2-bromo-4-isopropyl-thiazole (6.79 mmol) in anhydrous Et2O (30 mL) under nitrogen at −78° C. was added dropwise nBuLi (7.47 mmol). The reaction was stirred for 30 min and the temperature reached to −40° C. The reaction mixture was cooled down to −78° C. and tri-n-butyltinchloride (8.15 mmol) was added slowly. The reaction mixture was allowed to warm up to room temperature and stirred during 36 hrs. Et2O was added and the reaction was quenched with saturated NH4Cl. The organic layer was washed with saturated NH4Cl and brine. The organic layer was dried over Na2SO4, filtered, and concentrated under reduced pressure to give compound 219 as a pale yellow oil in quantitative yield.

1. customreached to −40° C
2. temperatureto warm up to room temperature
3. stirringstirred during 36 hrs
4. customthe reaction was quenched with saturated NH4Cl
5. washThe organic layer was washed with saturated NH4Cl and brine
6. dry with materialThe organic layer was dried over Na2SO4
7. filtrationfiltered
8. concentrationconcentrated under reduced pressure