Imidazole → HCID 69583505, compound

Participants

Reaction Steps

To a solution of 3-hydroxy-1-{4-[(1S,2S)-1-(hydroxymethyl)-2-methylbutylcarbamoyl]-1,3-thiazol-2-yl}azetidine (1.34 g, 4.48 mmol) (obtained as described in Reference Example 38(3)) in dimethylformamide (67 ml) were added t-butyldimethylsilyl chloride (810 mg, 5.37 mmol) and imidazole (527 mg, 5.37 mmol) in an ice bath, and then the reaction mixture was stirred in the ice bath for 2.5 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 toluene:acetonitrile (5:1→3:1) as the eluant to afford 3-hydroxy-1-{4-[(1S,2S)-1-(t-butyldimethylsilyloxymethyl)-2-methylbutylcarbamoyl]-1,3-thiazol-2-yl}azetidine (1.35 g, yield 97%) as a pale yellow oil.

Provenance & Evidence