A Novel Method for the Preparation of Optically Active Dipeptide. Chemo- and Stereoselective Reduction of 2-Hydroxyimino Amides with Samarium Diiodide
Various α,β-unsaturated amides derived from α-amino acids are converted to the corresponding 2-hydroxyimino amides of α-amino acids by the reaction with butyl nitrite and silane, which are directly reduced with samarium diiodide to the optically active dipeptides in good yields under mild conditions with high chemo- and stereoselectivities.