Asymmetric Synthesis of anti-β-Amino-α-Hydroxy Esters via Dynamic Kinetic Resolution of β-Amino-α-Keto Esters
C. Guy Goodman, Dung T. Do and Jeffrey S. Johnson*
*Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, 27599-3250, United States, Email: jsjunc.edu
C. G. Goodman, D. T. Do, J. S. Johnson, Org. Lett., 2013, 15, 2446-2449.
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α-Keto esters can be prepared via Mannich addition of ethyl diazoacetate to imines followed by oxidation of the diazo group with Oxone. Implementation of a recently developed dynamic kinetic resolution of β-substituted-α-keto esters via Ru(II)-catalyzed asymmetric transfer hydrogenation provides enantioenriched anti-α-hydroxy-β-amino acid derivatives in high diastereo- and enantioselectivity.
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