Trifluoroacetic acid → HCID 60031532, compound

Participants

Reaction Steps

To a solution of the compound (40.0 g) obtained in step 1 and N-benzyl-1-methoxy-N-((trimethylsilyl)methyl)methanamine (30.5 g) in toluene (230 mL) was added at 0° C. a solution of trifluoroacetic acid (1.80 mL) in toluene (20 mL), and the mixture was stirred at room temperature for 12 hr. To the reaction mixture was poured saturated aqueous sodium hydrogen carbonate solution, and the resultant mixture was extracted with ethyl acetate. The organic layer was washed with water and saturated brine and dried, and the solvent was evaporated under reduced pressure. The obtained residue was purified by silica gel column chromatography (solvent gradient; 10→50% ethyl acetate/hexane) to give (4R)-4-benzyl-3-{[(3S,4R)-1-benzyl-4-(4-chlorophenyl)pyrrolidin-3-yl]carbonyl}-1,3-oxazolidin-2-one (20.0 g, 36%) as a less polar compound, and (4R)-4-benzyl-3-{[(3R,4S)-1-benzyl-4-(4-chlorophenyl)pyrrolidin-3-yl]carbonyl}-1,3-oxazolidin-2-one (15.6 g, 28%) as a more polar compound, each as a white powder. property data of less polar compound:

Provenance & Evidence