Abstract
A novel domino reaction--stereoselective Ireland-Claisen rearrangement and asymmetric Michael addition--is described. A protocol starting from Baylis-Hillman adducts 3a-f using chiral lithium amide affords optically active gamma-substituted delta-amino acids 4a-f with high diastereoselectivities and enantioselectivities. The acid can be isolated easily from large-scale reactions and transformed to 2,3-disubstituted piperidines 11 or 2-substituted nipecotic acid derivates 12.
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