反应详情

In a 1 L 3-neck flask equipped with magnetic stir bar, nitrogen blanket and internal temperature probe dissolve 2-(2-bromoethoxy)tetrahydro-2H-pyran (34 g, 156 mmol) in acetonitrile (ACN, 400 mL). Add 4-iodopyrazole (29.34 g, 149.74 mmol) followed by cesium carbonate (73.4 g, 223.02 mmol). Stir the mixture at RT for 18 hours. Filter the reaction mixture through CELITE®, wash the filter cake with ACN and concentrate the filtrate to a golden oil. Use without further purification. Yield: 47.819 g (99%). MS (ES) m/z 323 [M+1]+.

1. customIn a 1 L 3-neck flask equipped with magnetic stir bar
2. filtrationFilter the reaction mixture through CELITE®
3. washwash the filter cake with ACN
4. concentrationconcentrate the filtrate to a golden oil
5. customUse without further purification