Condensation of the chiral 2-chloro-3-(alpha-methylbenzyl)tetrahydro-2H-1,3,2-oxaazaphosphorine 2-oxide (I) with 2-chloroethylamine (II) afforded the 2-(chloroethylamino) derivative (III). The chiral auxiliary group of (III) was then removed by catalytic hydrogenation with H2 over -Pd/C yielding (R)-2-(2-chloroethylamino)tetrahydro-2H-1,3,2-oxaazaphosphorine 2-oxide (IV). Acylation of (IV) with bromoacetyl bromide (V) in the presence of triethylamine hydrobromide furnished bromoacetamide (VI). The amide carbonyl group of (VI) was finally reduced by treatment with NaBH4 and BF3稥t2O.