Triacetone amine

Triacetone amine is the heterocycle that arises via the condensation of acetone and ammonia according to the following equation:
 * 3 CH3C(O)CH3 +  NH3  &rarr;  OC(CH2C(CH3)2)2NH  +  2 H2O

It is used to prepare the hindered amine 2,2,6,6-tetramethylpiperidine, CH2[CH2C(CH3)2]2NH.