Ethanol → HCID 67490921, compound

Participants

Reaction Steps

A 1.16 M solution of a borane-tetrahydrofuran complex in tetrahydrofuran (6.0 mL) was added dropwise to a solution of (1R,5R)-1-(tert-butoxycarbonylamino)-5-fluoro-4-oxo-3-[(1R)-1-phenylethyl]-3-azabicyclo[3.2.0]heptane (811 mg, 2.33 mmol) in tetrahydrofuran (6.0 mL) at 0° C. over five minutes. The mixture was heated to room temperature, stirred for five hours, and then cooled to −10° C. A mixture of ethanol (9.0 mL)-water (1.0 mL) was carefully added dropwise. After addition of triethylamine (3.0 mL) dropwise, the mixture was heated to reflux for one hour. The reaction solution was concentrated, and the precipitated white solid was removed by filtration through Celite. The filtrate was concentrated, and the resulting residue was purified by silica gel column chromatography (hexane:ethyl acetate=9:1→4:1) to give 530 mg (68%) of the title compound as a white solid.

Provenance & Evidence