An Easy Entry to (1S, 2S) and (1R, 2R)-Threo-Ifenprodil

Abstract A facile and practical synthesis of enantiomerically pure (L) or (D)-threo-Ifenprodil was accomplished from (1S, 2S)- and (1R, 2R)-threo-1-(p-nitrophenyl)-2-amino-propan-1, 3-diol via 3-phenylthio derivatives followed by Raney nickel reduction and conversion of the aromatic amine into phenol.