American Chemical Society
ja5b09773_si_002.cif (35.85 kB)

Asymmetric Synthesis of α‑Aminoboronic Acid Derivatives by Copper-Catalyzed Enantioselective Hydroamination

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posted on 2015-12-23, 00:00 authored by Daiki Nishikawa, Koji Hirano, Masahiro Miura
A copper-catalyzed regio- and enantio­selective hydroamination of alkenyl dan boronates (dan =1,8-diaminonaphthyl) with hydrosilanes and hydroxylamines proceeds to deliver the chiral α-aminoboronic acids in good yields with high enantiomeric ratios. The key to success is the introduction of an umpolung, electrophilic amination strategy. The copper catalysis can provide an unprecedented catalytic asymmetric approach to alkyl-substituted chiral α-aminoboronic acid derivatives of great potential in the fields of organic synthesis and medicinal chemistry.