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Substrate-Directed Enantioselective Aziridination of Alkenyl Alcohols Controlled by a Chiral Cation

[Image: see text] Alkene aziridination is a highly versatile transformation for the construction of chiral nitrogen-containing compounds. Inspired by the success of analogous substrate-directed epoxidations, we report an enantioselective aziridination of alkenyl alcohols, which enables asymmetric ni...

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Autores principales: Fanourakis, Alexander, Hodson, Nicholas J., Lit, Arthur R., Phipps, Robert J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2023
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10080694/
https://www.ncbi.nlm.nih.gov/pubmed/36961353
http://dx.doi.org/10.1021/jacs.3c00693
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author Fanourakis, Alexander
Hodson, Nicholas J.
Lit, Arthur R.
Phipps, Robert J.
author_facet Fanourakis, Alexander
Hodson, Nicholas J.
Lit, Arthur R.
Phipps, Robert J.
author_sort Fanourakis, Alexander
collection PubMed
description [Image: see text] Alkene aziridination is a highly versatile transformation for the construction of chiral nitrogen-containing compounds. Inspired by the success of analogous substrate-directed epoxidations, we report an enantioselective aziridination of alkenyl alcohols, which enables asymmetric nitrene transfer to alkenes with varied substitution patterns, including those not covered by the current protocols. We believe that our method is effective because it is substrate-directed, exploiting a network of attractive non-covalent interactions between the substrate, an achiral dianionic rhodium(II,II) tetracarboxylate dimer, and its two associated cinchona alkaloid-derived cations. It is these cations that provide a defined chiral pocket in which the aziridination can occur. In addition to a thorough evaluation of compatible alkene classes, we advance a practical mnemonic to predict reaction outcome and disclose a range of post-functionalization protocols that highlight the unique synthetic potential of the enantioenriched aziridine-alcohol products.
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spelling pubmed-100806942023-04-08 Substrate-Directed Enantioselective Aziridination of Alkenyl Alcohols Controlled by a Chiral Cation Fanourakis, Alexander Hodson, Nicholas J. Lit, Arthur R. Phipps, Robert J. J Am Chem Soc [Image: see text] Alkene aziridination is a highly versatile transformation for the construction of chiral nitrogen-containing compounds. Inspired by the success of analogous substrate-directed epoxidations, we report an enantioselective aziridination of alkenyl alcohols, which enables asymmetric nitrene transfer to alkenes with varied substitution patterns, including those not covered by the current protocols. We believe that our method is effective because it is substrate-directed, exploiting a network of attractive non-covalent interactions between the substrate, an achiral dianionic rhodium(II,II) tetracarboxylate dimer, and its two associated cinchona alkaloid-derived cations. It is these cations that provide a defined chiral pocket in which the aziridination can occur. In addition to a thorough evaluation of compatible alkene classes, we advance a practical mnemonic to predict reaction outcome and disclose a range of post-functionalization protocols that highlight the unique synthetic potential of the enantioenriched aziridine-alcohol products. American Chemical Society 2023-03-24 /pmc/articles/PMC10080694/ /pubmed/36961353 http://dx.doi.org/10.1021/jacs.3c00693 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Fanourakis, Alexander
Hodson, Nicholas J.
Lit, Arthur R.
Phipps, Robert J.
Substrate-Directed Enantioselective Aziridination of Alkenyl Alcohols Controlled by a Chiral Cation
title Substrate-Directed Enantioselective Aziridination of Alkenyl Alcohols Controlled by a Chiral Cation
title_full Substrate-Directed Enantioselective Aziridination of Alkenyl Alcohols Controlled by a Chiral Cation
title_fullStr Substrate-Directed Enantioselective Aziridination of Alkenyl Alcohols Controlled by a Chiral Cation
title_full_unstemmed Substrate-Directed Enantioselective Aziridination of Alkenyl Alcohols Controlled by a Chiral Cation
title_short Substrate-Directed Enantioselective Aziridination of Alkenyl Alcohols Controlled by a Chiral Cation
title_sort substrate-directed enantioselective aziridination of alkenyl alcohols controlled by a chiral cation
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10080694/
https://www.ncbi.nlm.nih.gov/pubmed/36961353
http://dx.doi.org/10.1021/jacs.3c00693
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