Chemistry:Triacetonamine
Triacetonamine is an organic compound with the formula OC(CH2CMe2)2NH (where Me = CH3). It is a colorless or white solid that melts near room temperature. The compound is an intermediate in the preparation of 2,2,6,6-tetramethylpiperidine, a sterically hindered base and precursor to the reagent called TEMPO. Triacetonamine is formed by the poly-aldol condensation of acetone in the presence of ammonia and calcium chloride:[1]
- 3 (CH3)2CO + NH3 → OC(CH2CMe2)2NH + 2 H2O
Reductive amination of triacetonamine gives 4-amino-2,2,6,6-tetramethylpiperidine.
It is primarily used as a stabilizer for plastics, typically via its conversion to number of hindered amine light stabilizers, but also finds use as a chemical feedstock. It is used to prepare the hindered amine 2,2,6,6-tetramethylpiperidine, CH2[CH2C(CH3)2]2NH,[2] as well as the radical oxidizer 4-Hydroxy-TEMPO.[3]
Triacetonamine has known application in the synthesis of alpha-eucaine.
A continuous process for the production of triacetonamine was developed:[4]
References
- ↑ Nabyl Merbouh; James M. Bobbitt; Christian Brückner (2004). "Preparation of Tetramethylpiperdine-1-oxoammonlum Salts and Their Use as Oxidants in Organic Chemistry. A Review". Organic Preparations and Procedures International 36: 1–31. doi:10.1080/00304940409355369.
- ↑ Sorgi, K. L. "2,2,6,6-Tetramethylpiperidine" in Encyclopedia of Reagents for Organic Synthesis (Ed: L. Paquette) 2004, J. Wiley & Sons, New York. doi:10.1002/047084289X.
- ↑ Ciriminna, Rosaria; Pagliaro, Mario (15 January 2010). "Industrial Oxidations with Organocatalyst TEMPO and Its Derivatives". Organic Process Research & Development 14 (1): 245–251. doi:10.1021/op900059x.
- ↑ "Continuous synthesis of triacetonamine over sulfonic acid-functionalized mesoporous silicas". RSC Advances 4 (34): 17860. 2014. doi:10.1039/c4ra00648h.
 |  |
