反应详情

To a solution of 1-(4-cyano-1,3-thiazol-2-yl)-3-hydroxyazetidine (0.78 g, 4.3 mmol) (obtained as described in Reference Example 4(2)) in methylene chloride (40 ml) were added methanesulfonyl chloride (1.0 ml, 12.9 mmol) and triethylamine (1.8 ml, 12.9 mmol) in an ice bath. After stirring the mixture in the ice bath for 10 minutes, the mixture was stirred at room temperature for 40 minutes. After checking the completion of the reaction, methanol was added to the reaction mixture in an ice bath and then the resulting mixture was stirred at room temperature for 30 minutes. The reaction mixture was partitioned between ethyl acetate and saturated aqueous sodium hydrogencarbonate solution. The organic layer was washed with saturated aqueous sodium chloride solution, dried over anhydrous magnesium sulfate, filtered and concentrated under reduced pressure. The residue was purified by chromatography on a silica gel column using toluene:ethyl acetate (1:1) as the eluant to afford 1-(4-cyano-1,3-thiazol-2-yl)-3-methanesulfonyloxyazetidine (1.12 g, yield 100%) as a white solid.

1. additionwas added to the reaction mixture in an ice bath
2. stirringthe resulting mixture was stirred at room temperature for 30 minutes
3. customThe reaction mixture was partitioned between ethyl acetate and saturated aqueous sodium hydrogencarbonate solution
4. washThe organic layer was washed with saturated aqueous sodium chloride solution
5. dry with materialdried over anhydrous magnesium sulfate
6. filtrationfiltered
7. concentrationconcentrated under reduced pressure
8. customThe residue was purified by chromatography on a silica gel column