Asymmetric Synthesis of Heterocyclic Chloroamines and Aziridines by Enantioselective Protonation of Catalytically Generated Enamines.

We report a method for the synthesis of chiral vicinal chloroamines via asymmetric protonation of catalytically generated prochiral chloroenamines using chiral Brønsted acids. The process is highly enantioselective, with the origin of asymmetry and catalyst substituent effects elucidated by DFT calculations. We show the utility of the method as an approach to the synthesis of a broad range of heterocycle-substituted aziridines by treatment of the chloroamines with base in a one-pot process, as well as the utility of the process to allow access to vicinal diamines. © 2022 The Authors. Chemistry - A European Journal published by Wiley-VCH GmbH.

Citation

Liam A McLean, Matthew W Ashford, James W B Fyfe, Alexandra M Z Slawin, Andrew G Leach, Allan J B Watson. Asymmetric Synthesis of Heterocyclic Chloroamines and Aziridines by Enantioselective Protonation of Catalytically Generated Enamines. Chemistry (Weinheim an der Bergstrasse, Germany). 2022 Mar 16;28(16):e202200060

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PMID: 35133031

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