Asymmetric Synthesis of γ-Nitroesters by an Organocatalytic One-Pot Strategy
作者:Kim L. Jensen、Pernille H. Poulsen、Bjarke S. Donslund、Fabio Morana、Karl Anker Jørgensen
DOI:10.1021/ol3002514
日期:2012.3.16
An enantioselective synthesis of γ-nitroesters by a one-pot asymmetric Michaeladdition/oxidative esterification of α,β-unsaturatedaldehydes is presented. The procedure is based on merging the enantioselective organocatalytic nitroalkane addition with an N-bromosuccinimide-based oxidation. The γ-nitroesters are obtained in good yields and enantioselectivities, and the method provides an attractive
of masked acetaldehyde to nitroalkenes via a rational approach helped to move away from the use of chloroform. The presented research allows the use of water as a reaction medium, therefore improving the industrial relevance of a protocol to access very important pharmaceutical intermediates. Critical to the success is the use of chemometrics-assisted 'Design of Experiments' (DoE) optimisation during