Diastereoselective hydrogenation of α,β-dehydrodipeptides bearing unsaturatedN-terminal amino acids and of ther complexes with CaCl2 and MgCl2
摘要:
The formation of complexes of dehydrodipeptides bearing N-terminal N-benzoyl-O-methyl-alpha,beta-dehydrotyrosine or N-benzoyl-alpha,beta-dehydrovaline residues with Ca2+ and Mg2+ ions enhances the diastereoselectivity of their hydrogenation; de of 66% and 80% were achieved. This method of increasing the stereoselectivity of hydrogenation is applicable to various dehydroamino acids at both the C- and N-termini of dehydrodipeptides.