The synthesis of the enantiomers of bupropion, (rac)-2-tert-butylamino
-3'-chloropropiophenone 1 (Wellbutrin(R)) is described. The enantiomer
s were compared with the racemate in both the tetrabenazine-induced se
dation model and the inhibition of uptake of biogenic amine assay. No
significant differences were found in their potencies to reverse tetra
benazine-induced sedation in mice or in their IC50 values as inhibitor
s of biogenic amine uptake into nerve endings obtained from mouse brai
n. (C) 1993 Wiley-Liss, Inc.