反应 #3279823
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openreactiondata ↗doi:10.6084/m9.figshare.5104873.v1; patent:US07001897B2
反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.
实验步骤: To a solution of 1-carbamoyl-3-hydroxyazetidine (obtained as described in Reference Example 21(1)) in dimethylformamide (100 ml) were added t-butyldiphenylsilyl chloride (18.0 ml, 66.9 mmol) and imidazole (4.55 g, 66.9 mmol) in an ice bath. After stirring the mixture in an ice bath for 10 minutes, the resulting mixture was stirred at room temperature overnight. After checking the completion of the reaction, ethanol (1 ml) was added to the reaction mixture in an ice bath and the resulting mixture was stirred at room temperature for 30 minutes. The reaction mixture was partitioned between ethyl acetate and 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:methanol (10:1) as the eluant to afford 3-t-butyldiphenylsilyloxy-1-carbamoylazetidine (1.45 g, total yield 18%) as a white solid. the resulting mixture was stirred at room temperature overnight was added to the reaction mixture in an ice bath the resulting mixture was stirred at room temperature for 30 minutes The reaction mixture was partitioned between ethyl acetate and aqueous sodium hydrogencarbonate solution The organic layer was washed with saturated aqueous sodium chloride solution dried over anhydrous magnesium sulfate filtered concentrated under reduced pressure The residue was purified by chromatography on a silica gel column
来源 ID: ord-041316a3a1a14f9986a0268e37d630b0