5,6-DIHYDROPHENANTHRIDIN-5-YL AS AN ACTIVATABLE PROTECTING GROUP OF CARBOXYLIC ACID—A DIRECT PREPARATION OF AMIDES FROM 5-ACYL-5,6-DIHYDROPHENANTHRIDINE
Various amides are directly prepared from the protected carboxylicacids, 5-acyl-5,6-dihydrophenanthridines, by the reaction with primary amines in the presence of cerie pyridinium chloride and cupric oxide.