Imidazole → HCID 57209876, compound

Participants

Reaction Steps

To a solution of (2S,4S)-1-allyloxycarbonyl-4-hydroxy-2-(2-methyl-3-oxo-1-butenyl)pyrrolidine (4.00 g) in N,N-dimethylformamide (40 ml) were added imidazole (2.70 g) and t-butyldimethylsilyl chloride (4.80 g). The resulting mixture was allowed to stand at ambient temperature for 2 hours. The mixture was diluted with ethyl acetate (200 ml), washed in turn with water and brine, dried over magnesium sulfate and evaporated. The residue was chromatographed on silica gel (100 ml) eluting with a mixture of n-hexane and ethyl acetate (9:1-8:2 V/V) to give (2S,4S)-1-allyloxycarbonyl-4-t-butyldimethylsilyloxy-2-(2-methyl-3-oxo-1-butenyl)-pyrrolidine (3.67 g).

Provenance & Evidence