Readily available protected forms of δ-amino-γ-msyloxy-α,β-enoates can be converted to protecteddipeptideisosteres, Ω[(E)CHCH]Gly, in high yields by reduction with alkenylcopper reagents.
Very high chemoselective, regioselective, and E-stereoselective 1,3-chirality transfer involving reaction of acyclic (E)- and (Z)-.gamma.-mesyloxy .alpha.,.beta.-enoates and organocyanocopper-trifluoroborane reagents. Efficient synthetic routes to functionalized chiral .alpha.-alkyl (E)-.beta.,.gamma.-enoates and (E)-allylic alcohols with high optical purity