2024
DOI: 10.1021/acs.organomet.3c00483
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Diastereoselective and Reversible Metallacycle Formation by Attack of a Pt-PR2OH Group on a Coordinated Nitrile in Pt-Catalyzed Hydration

Jorge A. Garduño,
Andrew J. Sasser,
Hannah J. Sexton
et al.

Abstract: Kinetic resolution of the racemic nitrile CH(Et)-(CN)(cyclo-N(CH 2 ) 3 C(O)−) by catalytic asymmetric hydration to form the amide CH(Et)(C(O)NH 2 )(cyclo-N(CH 2 ) 3 C(O)−) (Levetiracetam, Keppra) is an industrial biocatalytic process. To develop analogous procedures using chiral metal complexes as catalyst precursors, we investigated the mechanism and selectivity of the individual steps. Treatment of Pt(diphos)Cl 2 with AgOTf and secondary phosphine oxides (SPOs) gave the cations [Pt(diphos)(PR' 2 OH)(Cl)][OTf… Show more

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