4,6-Dimethyl-2-(4-nitrobenzyloxycarbonylthio)pyrimidine → (2R,4R)-1-p-nitrobenzyloxycarbonyl-2-(4-t-butoxycarbonylbutyl)-4-t-butyldimethylsilyloxypyrrolidine

Participants

Reaction Steps

S-p-Nitrobenzyloxycarbonyl-4,6-dimethyl-2-mercaptopyrimidine (719 mg) was added to 770 mg of (2R,4R)-2-(4-t-butoxycarbonylbutyl)-4-t-butyldimethylsilyloxypyrrolidine in 7 ml of tetrahydrofuran and stirred at room temperature for 2 hours. The reaction mixture was diluted with ethyl acetate, washed successively with brine, dilute hydrochloric acid and brine, dried over anhydrous sodium sulfate and distilled to remove the solvent. The residue was purified by silica gel chromatography to obtain (2R,4R)-1-p-nitrobenzyloxycarbonyl-2-(4-t-butoxycarbonylbutyl)-4-t-butyldimethylsilyloxypyrrolidine.

Provenance & Evidence