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À propos de : Asymmetric Synthesis of Silylated α-AminoAcid Esters through Dynamic KineticResolution        

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  • Asymmetric Synthesis of Silylated α-AminoAcid Esters through Dynamic KineticResolution
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  • Esters of three types of silylated α-amino acidshave been prepared from appropriate zirconaaziridines. Slowaddition (syringe pump) of the (R,R) carbonate of trans-stilbene gave metallacycles with the maximum possiblediastereomeric excess (as determined by the diastereomericexcess produced by the Hoffmann testthe same reactionbut with racemic carbonate). Methanolysis gave esters(RO2C)CH(R‘)(NHPh) (R‘ = Me3Si, Me3SiCH2, and p-Me3SiC6H4) with the same optical purity at the α carbon.
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