Abstract
The rapid generation of molecular complexity from simple starting materials is a key challenge in synthetic science. Enantioselective radical cyclization cascades have the potential to deliver complex, densely-packed, polycyclic architectures, with control of three dimensional shape, in one-step. Unfortunately, carrying out reactions with radicals in an enantiocontrolled fashion remains challenging due to their high reactivity. This is particularly the case for reactions of radicals generated using the classical reagent, SmI2. Here, we demonstrate that the first enantioselective SmI2-mediated radical cyclizations and cascades can convert symmetrical ketoesters to complex carbocyclic products bearing multiple stereocenters with high enantio- and diastereocontrol, and exploit a simple, recyclable chiral ligand. The first computational study of a SmI2-mediated carbon-carbon bond-forming process has been used to probe the origin of the selectivity. Our studies suggest that many processes that rely on SmI2 can be rendered enantioselective by the design of suitable ligands.
Original language | English |
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Pages (from-to) | 1198-1204 |
Journal | Nature Chemistry |
Volume | 9 |
Early online date | 7 Aug 2017 |
DOIs | |
Publication status | Published - 7 Aug 2017 |
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CCDC 1543525: Experimental Crystal Structure Determination
Kern, N. (Contributor), Plesniak, M. (Contributor), Mcdouall, J. (Contributor) & Procter, D. (Contributor), Cambridge Crystallographic Data Centre, 1 Jan 2017
DOI: 10.5517/ccdc.csd.cc1nt54s, http://www.ccdc.cam.ac.uk/services/structure_request?id=doi:10.5517/ccdc.csd.cc1nt54s&sid=DataCite
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CCDC 1531051: Experimental Crystal Structure Determination
Kern, N. (Contributor), Plesniak, M. (Contributor), Mcdouall, J. (Contributor) & Procter, D. (Contributor), Cambridge Crystallographic Data Centre, 1 Jan 2017
DOI: 10.5517/ccdc.csd.cc1nd5rz, http://www.ccdc.cam.ac.uk/services/structure_request?id=doi:10.5517/ccdc.csd.cc1nd5rz&sid=DataCite
Dataset