(13E)-(5RS,6RS,9alpha,11alpha,15S)-5-Bromo-6,9-epoxy-11,15-bis(tetrahydropyran-2-yloxy)prost-13-enoic acid methyl ester → (13E)-(5RS,6RS,9alpha,11alpha,15S)-5-Bromo-6,9-epoxy-11,15-dihydroxyprost-13-enoic acid methyl ester

Participants

Reaction Steps

360 mg of (13E)-(5RS,6RS,9α,11α,15S)-5-Bromo-6,9-epoxy-11,15-bis(tetrahydropyran-2-yloxy)prost-13-enoic acid methyl ester (prepared as described in Example 1) were dissolved in a mixture of 0.7 ml of tetrahydrofuran and 7 ml of 65% aqueous acetic acid and the mixture was stirred at 40° to 45° C. for one hour. The reaction mixture was then diluted with ethyl acetate, washed with water and an aqueous solution of sodium chloride, dried over magnesium sulphate and concentrated under reduced pressure. The residue was purified by column chromatography on silica gel using a mixture of cyclohexane and ethyl acetate (1:3) as eluent to give 210 mg of the title compound having the following physical characteristics:

Provenance & Evidence