3beta-Hydroxy-5alpha,6alpha-epoxyandrostane-17-one → Androstane-3beta,5alpha,17beta-triol

Participants

Reaction Steps

To a stirred suspension of LiAlH4 (0.247 mg) in THF under N2 (10.5 mL), a solution of 3β-hydroxy-5α,6α-epoxyandrostane-17-one (0.64 g) in THF (20 mL) was added dropwise and the mixture was stirred at reflux for 8 h. The suspension was cooled with an ice bath and then quenched by careful addition of H2O (1 mL) and 4N NaOH (0.20 mL). The mixture was filtered through a Celite pad and the filter cake was washed with THF (3×10 mL). The filtrate was dried over Na2SO4, evaporated to dryness and the residue was purified by flash chromatography (SiO2, n-hexane/CH2Cl2/acetone 40/30/30) to give androstane-3β,5α,17β-triol (0.48 g, 74%). 1H-NMR (300 MHz, DMSO-d6, ppm from TMS): δ 4.37 (1H, d), 4.19 (1H, d), 3.78 (1H, m), 3.62 (1H, s), 3.39 (1H, m), 1.87-0.80 (21H, m), 0.86 (3H, s), 0.59 (3H, s).

Provenance & Evidence