Journal
SCIENCE
Volume 360, Issue 6387, Pages 419-422Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aar6376
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Funding
- CASE studentship - EPSRC
- GlaxoSmithKline
- Pfizer
- University Research Fellowship - Royal Society
- EPSRC [EP/N005422/1]
- EPSRC [1918560, 1800778] Funding Source: UKRI
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Basic heteroarenes are a ubiquitous feature of pharmaceuticals and bioactive molecules, and Minisci-type additions of radical nucleophiles are a leading method for their elaboration. Despite many Minisci-type protocols that result in the formation of stereocenters, exerting control over the absolute stereochemistry at these centers remains an unmet challenge. We report a process for addition of prochiral radicals, generated from amino acid derivatives, to pyridines and quinolines. Our method offers excellent control of both enantioselectivity and regioselectivity. An enantiopure chiral Bronsted acid catalyst serves both to activate the substrate and induce asymmetry, while an iridium photocatalyst mediates the required electron transfer processes. We anticipate that this method will expedite access to enantioenriched small-molecule building blocks bearing versatile basic heterocycles.
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