Highly diastereo- and enantioselective organocatalytic michael addition of α-ketoamides to nitroalkenes

Org Lett. 2010 Nov 19;12(22):5246-9. doi: 10.1021/ol102289g. Epub 2010 Oct 25.

Abstract

The first organocatalytic enantio- and diastereoselective conjugate addition of α-ketoamides to nitroalkenes has been achieved using a bifunctional amino thiourea catalyst. In this new approach, the substrate amide proton plays a critical role in the formation of the Michael anti-adducts in high yields and high stereoselectivities. To illustrate the high synthetic potential of this methodology, the diastereo- and enantioselective synthesis of a hexasubstituted cyclohexane via a Michael-Michael-Henry cascade reaction is described.