HCID 22242996, compound → HCID 22243046, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 1-{4-[2-(t-butyldimethylsilyloxy)ethylcarbamoyl]-1,3-thiazol-2-yl}-3-methanesulfonyloxyazetidine (647.1 mg, 1.49 mmol) (obtained as described in Reference Example 33(5)) in dimethylformamide (32.0 ml) was added potassium thioacetate (1.28 mg, 8.9 mmol) at room temperature. The mixture was stirred in an oil bath (80° C.) for 4 hours. After checking the completion of the reaction, the reaction mixture was partitioned between ethyl acetate and 10% aqueous sodium chloride solution. The obtained organic layer was washed successively with saturated aqueous sodium hydrogencarbonate solution and saturated aqueous sodium chloride solution, dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure. The residue was purified by chromatography on a silica gel column using hexane:ethyl acetate (3:2) as the eluant to afford 3-acetylthio-1-{4-[2-(t-butyldimethylsilyloxy)ethylcarbamoyl]-1,3-thiazol-2-yl}azetidine (398.2 mg, yield 65%) as a pale brown solid.

Provenance & Evidence