Acetic Acid → 3-Hydroxy-1-[4-(methoxycarbonylaminomethyl)-1,3-thiazol-2-yl]azetidine

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Reaction Steps

To a solution of 3-t-butyldiphenylsilyloxy-1-[4-(methoxycarbonylaminomethyl)-1,3-thiazol-2-yl]azetidine (1.88 g, 3.90 mmol) (obtained as described in Reference Example 63(1)) in anhydrous tetrahydrofuran (94 ml) were added acetic acid (0.27 ml, 4.68 mmol) and 1.0 M tetra-n-butylammonium fluoride in tetrahydrofuran (4.68 ml, 4.68 mmol) in an ice bath and the mixture was stirred in an ice bath for 30 minutes. After checking the completion of the reaction, the 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 ethyl acetate as the eluant to afford 3-hydroxy-1-[4-(methoxycarbonylaminomethyl)-1,3-thiazol-2-yl]azetidine (426 mg, yield 45%) as a white solid.

Provenance & Evidence