A highly efficient and enantioselectivesynthesis of γ-lactams and γ-amino acids by Rh-catalyzedasymmetrichydrogenation has been developed. Using the Rh-(S,S)-f-spiroPhos complex, under mild conditions a wide range of 3-cyano acrylate esters including both E and Z-isomers and β-cyano-α-aryl-α,β-unsaturated ketones were first hydrogenated with excellent enantioselectivities (up to 98% ee) and high
Old Yellow Enzyme-mediated reduction of β-cyano-α,β-unsaturated esters for the synthesis of chiral building blocks: stereochemical analysis of the reaction
作者:Elisabetta Brenna、Francesco G. Gatti、Alessia Manfredi、Daniela Monti、Fabio Parmeggiani
DOI:10.1039/c3cy20804d
日期:——
acid derivatives for foldamer chemistry applications. The stereochemical outcome of the biotransformations was carefully analysed by means of deuteriumlabelingexperiments. The results of this analysis were employed to rationalise the effects of substrate-control on the stereoselectivity of a certain class of ene-reductase-mediated reduction reactions. A simple model was developed to describe the structural