59969-65-2

(2S,3R)-3-Amino-2-hydroxy-4-phenylbutyric acid (AHPA) derivatives are used as inhibitors of enkephalinase(s) to augment met5-enkephalin-induced anti-nociception. The derivative (2S,3R)-3-amino-2-hydroxy-4-phenylbutanoyl-L-valine (AHPA-Val) is used as a bestatin analogue.

(2S,3R)-3-(((Benzyloxy)carbonyl)aMino)-2-hydroxy-4-phenylbutanoic acid is prepared by Hydrogenolysis of Methyl (αS,βR)-α-hydroxy-β-[[(phenylmethoxy)carbonyl]amino]benzenebutanoate with Sodium hydroxide in 1,4-Dioxane.