A convenient method for the stereoselective preparation of 3-hydroxy-2-substituted propionaldehyde derivatives, C-terminal precursors for the synthesis of trans-alkene dipeptide isosteres
Abstract:S)-3-hydroxy-2-substituted propionaldehyde dimethyl or diethyl acetals 3, which are versatile synthons in dipeptide isostere synthesis, were synthesized in 54-95% enantiomeric excess by reduction of (S,R)-acetalized acyloxazolidinones 7 with LiA1H4.
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