Über das 4-Hydroxy-6,6-dimethyl-5,6-dihydro-2(1H)-pyridinthion bzw.-on und die entsprechenden Tautomeren

The tautomers, 4-hydroxy-5,6-dihydro-6,6-dimethyl-2(1H)-pyridinethione (1) and 6,6-dimethyl-2-thioxo-4-piperidone (2) resp., and 4-hydroxy-5,6-dihydro-6,6-dimethyl-2(1H)-pyridone (9) and 6,6-dimethyl-2,4-piperidinedione (10) resp. were synthesized by hydrolysis of 4-amino-5,6-dihydro-6,6-dimethyl-2(1H)-pyridinethiones (4, 5) and-ones (11, 12).1, 2 and9, 10 undergo an aminolysis in amines to the corresponding 4-aminodihydro-2(1H)-pyridinethiones4, 5 and-ones11, 12 resp.