Copper-Catalyzed Asymmetric Hydroboration of α-Dehydroamino Acid Derivatives: Facile Synthesis of Chiral β-Hydroxy-α-amino Acids
摘要:
The Cu-catalyzed asymmetric conjugate hydroboration reaction of beta-substituted alpha-dehydroamino acid derivatives has been established, affording enantioenriched syn- and anti-beta-boronate-alpha-amino acid derivatives with excellent combined yields (83-99%, dr approximate to 1:1) and excellent enantioselectivities (92-98% ee). The hydroboration products were expediently converted into valuable beta-hydroxy-alpha-amino acid derivatives, which were widely used in the preparation of chiral drugs and bioactive molecules.
Copper-Catalyzed Asymmetric Hydroboration of α-Dehydroamino Acid Derivatives: Facile Synthesis of Chiral β-Hydroxy-α-amino Acids
摘要:
The Cu-catalyzed asymmetric conjugate hydroboration reaction of beta-substituted alpha-dehydroamino acid derivatives has been established, affording enantioenriched syn- and anti-beta-boronate-alpha-amino acid derivatives with excellent combined yields (83-99%, dr approximate to 1:1) and excellent enantioselectivities (92-98% ee). The hydroboration products were expediently converted into valuable beta-hydroxy-alpha-amino acid derivatives, which were widely used in the preparation of chiral drugs and bioactive molecules.