Enantio-Complementary Synthesis of 2-Substituted Pyrrolidines and Piperidines via Transaminase-Triggered Cyclizations

Journal Article (2023)
Author(s)

Christian M. Heckmann (TU Delft - BT/Biocatalysis)

Caroline Paul (TU Delft - BT/Biocatalysis)

Research Group
BT/Biocatalysis
Copyright
© 2023 C.M. Heckmann, C.E. Paul
DOI related publication
https://doi.org/10.1021/jacsau.3c00103
More Info
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Publication Year
2023
Language
English
Copyright
© 2023 C.M. Heckmann, C.E. Paul
Research Group
BT/Biocatalysis
Issue number
6
Volume number
3
Pages (from-to)
1642-1649
Reuse Rights

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Abstract

Chiral N-heterocycles are a common motif in many active pharmaceutical ingredients; however, their synthesis often relies on the use of heavy metals. In recent years, several biocatalytic approaches have emerged to reach enantiopurity. Here, we describe the asymmetric synthesis of 2-substituted pyrrolidines and piperidines, starting from commercially available ω-chloroketones by using transaminases, which has not yet been comprehensively studied. Analytical yields of up to 90% and enantiomeric excesses of up to >99.5% for each enantiomer were achieved, which has not previously been shown for bulky substituents. This biocatalytic approach was applied to synthesize (R)-2-(p-chlorophenyl)pyrrolidine on a 300 mg scale, affording 84% isolated yield, with >99.5% ee.