aluminum deuteride (DIBAL-D) in 75% yield as described by Kalvin et al. l0 The mass spectral analysis of compound 4 showed 99.9% deuterium incorporation. Deuterio aldehyde 4 (Scheme 11) was reduced in a stereospecific manner with (R)-and (S)-Alpine boranes1'to yield the chiral S and R alcohols 5a (73%) and 5b (75%), respectively. Midland et al. 12Gb and other investigatorslkpd have prepared a variety of chiral primary deuterio alcohols in ...