Triethylamine → HCID 57519012, compound

Participants

Reaction Steps

t-Butyl N-[1-(4-benzyloxyphenyl)-3-hydroxypropyl]-N-methylcarbamate (1.50 g, 4.0 mmol) obtained from Example 115b was dissolved in tetrahydrofuran (20 ml) under an atmosphere of nitrogen. To the solution was added triethylamine (0.84 ml, 6.0 mmol) and then methanesulfonyl chloride (0.37 ml, 4.8 mmol), in an ice bath. The resulting mixture was stirred at room temperature for 30 minutes. The reaction mixture was partitioned between water and ethyl acetate. The organic layer was washed with saturated aqueous sodium chloride solution, dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The residue was dissolved in N,N-dimethylformamide (20 ml) and to the solution was added 15-crown-5 (1.2 ml, 6.0 mmol) and then sodium cyanide (294 mg, 6.0 mmol). The resulting mixture was stirred at room temperature overnight. The reaction mixture was partitioned between water and ethyl acetate. The organic layer was washed with saturated aqueous sodium chloride solution, dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The residue was purified by chromatography on a silica gel column using hexane:ethyl acetate=80:20 to 70:30 as the eluent to afford the desired compound (1.41 g).

Provenance & Evidence