Delta**3 piperidone enol ethers and a process for their preparation

Abstract

Abstract NEW PIPERIDONE ENOL ETHERS HAVING THE FORMULA 2,2,6,6-TETRA(CH3-),4-(R-O-)-1,2,5,6-TETRAHYDROPYRIDINE WHEREIN R REPRESENTS AN ALKYL GROUP OF 1-18 CARBON ATOMS; A CYCOALKYL GROUP WHICH CONTAINS 5 OR 6 CARBON ATOMS AND MAY BE SUBSTITUTED WITH AN ALKYL GROUP OF 1-4 CARBON ATOMS OR HYDROXYL GROUP; OR THE GROUP OF THE FORMULA -CH2-R'' IN WHICH R'' REPRESENTS AN ARYL GROUP WHICH CONTAINS 6-10 CARBON ATOMS AND MAY BE SUBSTITUTED WITH AN ALKYL GROUP OF 1-4 CARBON ATOMS, AN ALKOXY GROUP OF 1-4 CARBON ATOMS, A HALOGEN ATOM OR HYDROXYL GROUP IN THE ARYL MOIETY OR A 5- OR 6-MEMBERED HETEROCYCLIC GROUP WHICH CONTAINS OXYGEN ATOM AS A HERETO ATOM AND MAY BE SUBSTITUTED WITH AN ALKYL GROUP OF 1-4 CARBON ATOMS, AN ALKOXY GROUP OF 1-4 CARBON ATOMS, A HALOGEN ATOM OR HYDROXYL GROUP. THESE PIPERIDONE ENOL ETHERS ARE PREPARED BY REACTING TRIACETONAMINE WITH AN ALCOHOL HAVING THE FORMULA R-OH WHEREIN R IS AS DEFINED ABOVE IN THE PRESENCE OF AN ACID CATALYST. THESE PIPERIDONE ENOL ETHERS EXHIBIT A SUPERIOR STABILIZING EFFECT AGAINST PHOTO- AND THERMO-DETERIORATION OF VARIOUS SYNTHETIC POLYMERS AND THUS THEY ARE USEFUL AS A STABILIZER FOR SYNTHETIC POLYMERS.

Inventors

• 👤 Keisuke Murayama
• 👤 Toshimasa Toda
• 👤 Eiko Yamao
• 👤 Katsuaki Matsui
• 👤 Tomoyuki Kurumada
• 👤 Noriyuki Ohta
• 👤 Ichiro Watanabe

Bibliographic Details