反应详情

A 20 mL vial was charged with sodium triacetoxyborohydride (1.0 g, 4.8 mmol), (R)-1-(3-chlorophenyl)ethanamine 55 (0.413 g, 2.7 mmol), 1-(4-fluorophenyl)-5-oxopyrrolidine-3-carbaldehyde 54 (0.500 g, 2.4 mmol), 10 mL of DCE, and 5 drops of AcOH. This mixture was stirred at room temperature overnight then quenched with saturated aqueous NaHCO3. The mixture was extracted with DCM, dried, concentrated, and purified by column chromatography on silica gel (3% to 7% MeOH in DCM) to give 4-({[(1R)-1-(3-chlorophenyl)ethyl]amino}methyl)-1-(4-fluorophenyl)pyrrolidin-2-one 56 as a 1:1 mixture of diastereomers. Mass spectrum: calculated for C19H20ClFN2O 346.1; found 347.2 (M++1).

1. customthen quenched with saturated aqueous NaHCO3
2. extractionThe mixture was extracted with DCM
3. customdried
4. concentrationconcentrated
5. custompurified by column chromatography on silica gel (3% to 7% MeOH in DCM)