Pl. Beaulieu et al., LARGE-SCALE PREPARATION OF (2S,3S)-N-BOC-3-AMINO-1,2-EPOXY-4-PHENYLBUTANE - A KEY BUILDING-BLOCK FOR HIV-PROTEASE INHIBITORS, Tetrahedron letters, 36(19), 1995, pp. 3317-3320
(2S,3S)-N-Boc-3-amino-1,2-epoxy-4-phenylbutane is prepared in four ste
ps from commercially available N,N-dibenzyl-L-phenylalaninol. The synt
hesis is amenable to the preparation of kilogram quantities of enantio
merically pure material.