Sodium Hydroxide → HCID 136397841, compound

Participants

Reaction Steps

The product of Step 2 (555 mg) is dissolved in methanol (10 mL) and 2M methanolic sodium hydroxide (1 mL) is added. After 1 hour the solvent is evaporated and the residue partitioned between water and ethyl acetate. The organic phase is dried over magnesium sulfate and evaporated. Purification by flash chromatography eluting with hexanes-ethyl acetate (1:1) affords 5-hydroxyfuran-2-carboxylic acid (6S,9S,10S,11S,13S,16R,17R)-9,11-epoxy-6-fluoro-17-methoxycarbonyl-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl ester. TLC Rf 0.25 (1:1 hexane-ethyl acetate elution).

Provenance & Evidence