Highly Efficient Organocatalytic Kinetic Resolution of Activated Nitroallylic Acetates with Aldehydes via Conjugate Addition−Elimination
作者:Raju Jannapu Reddy、Kwunmin Chen
DOI:10.1021/ol200133y
日期:2011.3.18
A novel, efficient, and unprecedented organocatalytic kineticresolution has been developed. For the first time, a variety of nitroallylicacetates 1a−i have been resolved with aldehydes in the presence of 2 (2.5 mol %) via conjugateaddition−elimination. The densely functionalized products 3a−o were obtained with excellent enantioselectivities (up to >99% ee), and unreacted substrates 1a−i were recovered
Three-Component Organocascade Kinetic Resolution of Racemic Nitroallylic Acetates via Sequential Iminium/Enamine Asymmetric Catalysis
作者:Suparna Roy、Kwunmin Chen
DOI:10.1021/ol300783e
日期:2012.5.18
Nitroallylic acetates 1a–f have been kinetically resolved via an asymmetric three-component coupling that involves indoles, acrolein, and nitroolefin allylic acetates and is mediated by the chiral catalyst 2 (5 mol %). The reactions proceed via iminium/enamine cascade catalysis. Both recovered starting substrates and reaction products are typically obtained in high chemical yield and in good to excellent
Correction to Three-Component Organocascade Kinetic Resolution of Racemic Nitroallylic Acetates via Sequential Iminium/Enamine Asymmetric Catalysis
作者:Suparna Roy、Kwunmin Chen
DOI:10.1021/ol503315p
日期:2014.12.19
Revised file containing experimental data and spectra. This material is available free of charge via the Internet at http://pubs.acs.org. This article is cited by 1 publications. Revised file containing experimental data and spectra. This material is available free of charge via the Internet at http://pubs.acs.org.