Racemization Catalyst for Amino Acids. II. Racemization with Aurintricarbonic Acid

Abstract The catalytic racemization of amino acids with aurintricarboxylic acid was examined in the presence of cupric ion. The tests were conducted at various pH values to study the optimum pH for the racemization. Moreover the racemizations with aurintricarboxylic acid and with o-cresolphthalein were compared and the results are briefly discussed with regard to the relationship between the structural features and the activities of these catalysts.