Highly Diastereoselective 1,4-Addition of Amines to Chiral α,β-Unsaturated δ-Lactone

Abstract
Michael addition of amines to (S)-γ-amino-α,β-unsaturated δ-lactone was accomplished in extremely high diastereoselectivity with the ring-opening reactions and was disclosed to furnish (3R,4S)-diamino-hydroxyamides in high yields.