Tetrahydrofuran → HCID 20801253, compound

Participants

Reaction Steps

A solution of borane-tetrahydrofuran complex in tetrahydrofuran (1M, 25 ml) was added dropwise to a stirred, ice-bath cooled solution of the product from Description 44 (5.8 g, 13.5 mmol) in tetrahydrofuran (70 ml). The cold-bath was removed and the mixture was stirred at ambient temperature. After 30 minutes, the mixture was cooled to 0° C. and carefully treated with 2M aqueous NaOH (20 ml) and 35% hydrogen peroxide (20 ml). The cold bath was removed and the mixture was stirred for 1 hour. After cooling to 0°, the reaction was carefully treated with 25% aqueous solution of Na2S3O5 (125 ml) and extracted into ethyl acetate. The combined organic extracts were dried (Na2SO4) and concentrated in vacuo. The residue was purified by chromatography on silica (i-hexane:ethyl acetate) to give a mixture of diastereoisomeric alcohols (5.34 g) in the ratio (3S):(3R)=1.9:1.

Provenance & Evidence