Peptide/Laccase Cocatalyzed Asymmetric α-Oxyamination of Aldehydes
作者:Kengo Akagawa、Kazuaki Kudo
DOI:10.1021/ol2012956
日期:2011.7.1
An asymmetric α-oxyamination could be successfully performed by a peptide catalyst and laccase. The combination of peptide catalysis and enzymatic air oxidation promoted the reaction smoothly in water without employing a metal reagent. The oxyaminated compounds could be obtained as both aldehyde and carboxylic acid products depending on the reaction conditions.
General and stereoselective aminoxylation of biradical titanium(<scp>iv</scp>) enolates with TEMPO: a detailed study on the effect of the chiral auxiliary
作者:Stuart C. D. Kennington、Alejandro Gómez-Palomino、Ernest Salomó、Pedro Romea、Fèlix Urpí、Mercè Font-Bardia
DOI:10.1039/c8ob01074a
日期:——
comprehensive analysis of the influence of the chiralauxiliary on the α-aminoxylation of titanium(IV) enolates with TEMPO indicated that (S) 4-tert-butyl-1-oxazolidine-2-thione is the most appropriate scaffold to provide a single diastereomer in high yields for a variety of substrates, which converts such a radical reaction into a highly chemo- and stereoselective oxidation.