Diastereoselective catalytic hydrogenation of pyruvic acid esters, amides, and their Schiff bases has been well studied over a long period to show that proline
Six phenolic monomers (M1 - M6) have been synthesized, namely, potassium-3-(ortho,para)-hydroxy benzoyl dithiofor- mate (M1 and M2), (ortho,para)-(4-amino-5-mer