Oxolane--water (1/1) → HCID 66856356, compound

Participants

Reaction Steps

To a solution of 6-allyl-3-((S)-1-(2′,4′-difluorobiphenyl-4-yl)ethyl)-6-(4-fluorophenyl)-1,3-oxazinan-2-one (obtained as described in Example 111) in THF-H2O (1:1, 20 mL) were added NaIO4 (1.0148 g, 4.74 mmol, 5 equiv) and OsO4 (2.5 wt. % solution in t-BuOH, 0.1708 g, 0.0167 mmol, 0.018 equiv), and the mixture was stirred at rt for 2 h. The mixture was diluted with EtOAc, dried over Na2SO4, and concentrated under reduced pressure. The residue was dissolved in MeOH (10 mL) and NaBH4 (0.200 g) was added. After the mixture was stirred for 1 h at rt, acetone was added. The solvents were removed in vacuo, the residue was treated with saturated brine, extracted with CH2Cl2, and dried over Na2SO4. After the solvents were evaporated, the residue was purified by chromatography on silica gel eluted with hexanes/EtOAc to afford the two diastereomers of 3-((S)-1-(2′,4′-difluorobiphenyl-4-yl)ethyl)-6-(4-fluorophenyl)-6-(2-hydroxyethyl)-1,3-oxazinan-2-one.

Provenance & Evidence