Diastereoselective Synthesis of gamma -Hydroxy-beta -Amino Alcohols and (2S,3S)-beta -Hydroxyleucine from Chiral D-(N,N-Dibenzylamino)serine (TBDMS) Aldehyde

Title serine deriv. I (TBDMS = tert-butyldimethylsilyl; Bn = benzyl) was synthesized from D-serine in excellent overall yield. The reactions of I with Grignard and organocerium reagents were highly stereoselective (Felkin model) to give gamma -hydroxy-beta -amino alcs. II (R = CHMe2, Me, Ph, Bu) in good yield. Transformation of II (R = CHMe2) into (2S,3S)-beta -hydroxyleucine (III) is also reported. [on SciFinder (R)]