反应详情

To a solution of (2S,4R)-2-acetylthiomethyl-4-t-butyldimethylsilyloxy-1-(4-nitrobenzyloxycarbonyl)pyrrolidine (2.0 g) in methanol (20 ml) was added 28% sodium methoxide-methanol solution (0.98 ml) under an atmosphere of nitrogen at 0° C. After stirring at the same temperature for 10 minutes, to this reaction mixture was added 2-iodoacetamide (1.02 g) under the same condition. The mixture was stirred at ambient temperature for 3 hours The reaction mixture was concentrated under reduced pressure. The resulting residue was dissolved in ethyl acetate (100 ml). The solution was washed with saturated aqueous sodium hydrogen carbonate and saturated sodium chloride successively, dried over anhydrous magnesium sulfate, and evaporated in vacuo to give (2S,4R)-4-t-butyldimethylsilyloxy-2-(carbamoylmethyl)thiomethyl-1-(4nitrobenzyloxycarbonyl)pyrrolidine (2.11 g).

1. stirringThe mixture was stirred at ambient temperature for 3 hours The reaction mixture
2. concentrationwas concentrated under reduced pressure
3. dissolutionThe resulting residue was dissolved in ethyl acetate (100 ml)
4. washThe solution was washed with saturated aqueous sodium hydrogen carbonate and saturated sodium chloride successively
5. dry with materialdried over anhydrous magnesium sulfate
6. customevaporated in vacuo