On heating of a-acetyl-benzylcyanide (II) with a mixture of acetic acid and sulphuric acid, 4, 6 - dimethyl - 3. 5 - diphenyl - pyridone - 2 (X V) is formed. This product is formed by condensation of the amide (XI) with the ketone (VII), both originating from the cyanide (II). With some other a-acyl-benzylcyanides an analogous reaction has been observed (Chapter II). ... Zie Samenvattin