Asymmetric synthesis of γ-branched amines via rhodium-catalyzed reductive amination

Zhao Wu, Summer D. Laffoon and Kami L. Hull ()
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Zhao Wu: University of Illinois at Urbana-Champaign
Summer D. Laffoon: University of Illinois at Urbana-Champaign
Kami L. Hull: University of Illinois at Urbana-Champaign

Nature Communications, 2018, vol. 9, issue 1, 1-7

Abstract: Abstract Amines bearing γ-stereocenters are highly important structural motifs in many biologically active compounds. However, reported enantioselective syntheses of these molecules are indirect and often require multiple steps. Herein, we report a general asymmetric route for the one-pot synthesis of chiral γ-branched amines through the highly enantioselective isomerization of allylamines, followed by enamine exchange and subsequent chemoselective reduction. This protocol is suitable for establishing various tertiary stereocenters, including those containing dialkyl, diaryl, cyclic, trifluoromethyl, difluoromethyl, and silyl substituents, which allows for a rapid and modular synthesis of many chiral γ-branched amines. To demonstrate the synthetic utility, Terikalant and Tolterodine are synthesized using this method with high levels of enantioselectivity.

Date: 2018
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DOI: 10.1038/s41467-018-03535-y

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