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Title: Direct, stereodivergent, and catalytic Michael additions of thioimides to α,β-unsaturated aldehydes – Total synthesis of Tapentadol
Author: Galeote, Oriol
Kennington, Stuart C. D.
Benedito, Gabriela
Fraedrich, Lena
Davies-Howe, Evan
Costa i Arnau, Anna M.
Romea, Pedro
Urpí Tubella, Fèlix
Aullón López, Gabriel
Font Bardia, Ma. Mercedes
Puigjaner, Cristina
Keywords: Compostos carbonílics
Carbonyl compounds
Issue Date: 14-Jan-2024
Publisher: Wiley-VCH
Abstract: Direct and stereodivergent Michael additions of N-acyl 1,3-thiazinane-2-thiones to α,β-unsaturated aldehydes catalyzed by chiral nickel(II) complexes are reported. The reactions proceed with a remarkable regio-, diastereo-, and enantioselectivity, so access to any of the four potential Michael stereoisomers is granted through the appropriate choice of the chiral ligand of the nickel(II) complex. Simple removal of the heterocyclic scaffold furnishes a wide array of either syn or anti enantiomerically pure derivatives, which can be exploited for the asymmetric synthesis of biologically active compounds, as demonstrated in a new approach to tapentadol. In turn, a mechanism, based on theoretical calculations, is proposed to account for the stereochemical outcome of these transformations.
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It is part of: Angewandte Chemie-International Edition, 2024, vol. 63, p. e202319308
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ISSN: 1433-7851
Appears in Collections:Articles publicats en revistes (Química Inorgànica i Orgànica)

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