Isothiourea-catalysed acylative kinetic resolution of aryl-alkenyl (sp2 vs. sp2) substituted secondary alcohols
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The non-enzymatic acylative kinetic resolution of challenging aryl–alkenyl (sp2 vs. sp2) substituted secondary alcohols is described, with effective enantiodiscrimination achieved using the isothiourea organocatalyst HyperBTM (1 mol %) and isobutyric anhydride. The kinetic resolution of a wide range of aryl–alkenyl substituted alcohols has been evaluated, with either electron-rich or naphthyl aryl substituents in combination with an unsubstituted vinyl substituent providing the highest selectivity (S=2–1980). The use of this protocol for the gram-scale (2.5 g) kinetic resolution of a model aryl–vinyl (sp2 vs. sp2) substituted secondary alcohol is demonstrated, giving access to >1 g of each of the product enantiomers both in 99:1 e.r.
Musolino , S F , Ojo , O S , Westwood , N J , Taylor , J E & Smith , A D 2016 , ' Isothiourea-catalysed acylative kinetic resolution of aryl-alkenyl (sp 2 vs. sp 2 ) substituted secondary alcohols ' , Chemistry - A European Journal , vol. 22 , no. 52 , pp. 18916-18922 . https://doi.org/10.1002/chem.201604788
Chemistry - A European Journal
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