Hydrochloric Acid → (2S,4R)-4-hydroxy-1-(4-nitrobenzyloxycarbonyl)-2-[{(3S)-1-(4-nitrobenzyloxycarbonyl)pyrrolidin-3-ylthio}-methyl]pyrrolidine

Participants

Reaction Steps

To a solution of (2S, 4R)-4-t-butyldimethylsilyloxy-1-(4-nitrobenzyloxycarbonyl)-2-[{(3S)-1-(4-nitrobenzyloxycarbonyl)pyrrolidin-3-ylthio}methyl]pyrrolidine (1.94 g) in a mixture of methanol (20 ml) and tetrahydrofuran (20 ml) was added conc. hydrochloric acid (0.48 ml) at ambient temperature and the mixture was stirred at ambient temperature for 1 hour. The reaction mixture was evaporated in vacuo to give a residue. The residue was dissolved in ethyl acetate (50 ml) and the solution was washed three times with saturated aqueous sodium hydrogen carbonate (50 ml) and saturated aqueous sodium chloride (20 ml) successively, dried over magnesium sulfate, and evaporated in vacuo. The resulting residue was chromatographed on silica gel (100 g) eluting with a mixture of dichloromethane and acetone (5:1 v/v) to give (2S, 4R)-4-hydroxy-1-(4-nitrobenzyloxycarbonyl)-2-[{(3S)-1-(4-nitrobenzyloxycarbonyl)pyrrolidin-3-ylthio}-methyl]pyrrolidine (1.10 g).

Provenance & Evidence