(R)-Benzoins and (R)-2-hydroxypropiophenone derivatives are formed on a preparativescale by benzaldehyde lyase (BAL)-catalyzed C−C bond formation from aromatic aldehydes and acetaldehyde in aqueous buffer/DMSO solution with remarkable ease in high chemical yield and highopticalpurity. The substrate range of this thiamin diphosphate-dependent enzyme was examined with respect to a broad applicability
Biocatalytic Route to Chiral Acyloins: P450-Catalyzed Regio- and Enantioselective α-Hydroxylation of Ketones
作者:Rubén Agudo、Gheorghe-Doru Roiban、Richard Lonsdale、Adriana Ilie、Manfred T. Reetz
DOI:10.1021/jo502397s
日期:2015.1.16
monooxygenase generated by directed evolution are excellent catalysts for the oxidative α-hydroxylation of ketones with formation of chiral acyloins with high regioselectivity (up to 99%) and enantioselectivity (up to 99% ee). This constitutes a new route to a class of chiral compounds that are useful intermediates in the synthesis of many kinds of biologically active compounds.
incorporate two functional groups are very limited. In this study, we combined photoorgano redox catalysis and P450 biocatalysts to obtain dioxygen-functionalization of α/β-C–H bonds of arylalkanes in a straightforward manner. The synthesis of enantiomerically chiral acyloins through a one-pot two-step photoredox/P450-catalyzed cascadereaction is described. Two P450 mutants with stereocomplementary bio-oxidation