Yum JH, Park S, Hiraga R, Okamura I, Notsu S, Sugiyama H. Modular DNA-based hybrid catalysts as a toolbox for enantioselective hydration of α,β-unsaturated ketones.
Org Biomol Chem 2019;
17:2548-2553. [PMID:
30762058 DOI:
10.1039/c9ob00196d]
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Abstract
The direct addition of water to a carbon-carbon double bond remains a challenge, but such a reaction is essential for the development of efficient catalysts that enable direct access to chiral alcohols. We now report on the enantioselective hydration of α,β-unsaturated ketones, catalyzed by modular DNA-based hybrid catalysts, affording β-hydroxy ketones with up to 87% enantiomeric excess. Oligonucleotides containing an intrastrand bipyridine ligand were readily synthesized by a straightforward process using an automated solid-phase synthesis. A library of DNA-based hybrid catalysts could be systematically generated based on the composition of nucleobases, and the incorporation of a binding ligand and a nonbinding steric moiety. This study demonstrates the potential of modular DNA-based hybrid catalysts as a toolbox to accomplish the challenging enantioselective hydration reaction.
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