“Synthetic Enzymes”. Highly Stereoselective Epoxidation of Chalcone in a Triphasic Toluene‐Water‐Poly[(S)‐alanine] System

Chiral polypeptides as catalysts enable stereoselective reactions. An excellent example is the reaction of chalcone with H2O2/NaOH in the three-phase system toluene-water-poly[(S)-alanine] (optical yield of (1) over 90%).