Abstract

Abstract The trisubstituted olefinic bond of chiral cyclic α,β-didehydroamino acid derivatives was hydrogenated in the presence of Pd/C with >95% diastereoface discrimination to give, after hydrolysis, the corresponding S-amino acids. The reduction of the double bond with L-selectride® does not change the orientation of diastereoface discrimination and the diastereoselectivity is still high.

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