Imidazole → HCID 69543967, compound

Participants

Reaction Steps

To a solution of 3-hydroxy-1-{4-[(1S)-1-(hydroxymethyl)-propylcarbamoyl]-1,3-thiazol-2-yl}azetidine (940 mg, 3.50 mmol) (obtained as described in Reference Example 34(3)) in dimethylformamide (47 ml) were added t-butyldimethylsilyl chloride (633 mg, 4.20 mmol) and imidazole (286 mg, 4.20 mmol) in an ice bath, and the reaction mixture was stirred at room temperature for 3 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 n-hexane:ethyl acetate (2:1→1:3) as the eluant to afford 1-{4-[(1S)-1-(t-butyldimethylsilyloxymethyl)propylcarbamoyl]-1,3-thiazol-2-yl}-3-hydroxyazetidine (1.00 g, yield 74%) as a pale yellow oil.

Provenance & Evidence