TITLE:
Effect of Temperature on the Reaction of 2-(N-acetylamine)-3-(3,5-di-tert-butyl-4-hydroxyphenyl)-propionic Acid with Oxygen in an Alkaline Condition
AUTHORS:
A. A. Volodkin, G. E. Zaikov, L. N. Kurkovskaja, S. M. Lomakin, I. M. Levina, E. V. Koverzanova
KEYWORDS:
2-(N-acetylamine)-3-(3, 5-di-tert-butyl-4-hydroxyphenyl)-propionic Acid, 6, 8-di-tert-butyl-3-(N-acetylamine)spiro(4, 5)deca-1-oxa-5, 8-dien-2, 7-dione Oxidation by Oxygen, 2, 4-Di-tert-butylbicyclo(4, 3, 1)deca-4, 6-dien-8-(N-acetylamine)-3, 9-dion-1-oxa, NMR-Spectroscopy
JOURNAL NAME:
Advances in Chemical Engineering and Science,
Vol.5 No.3,
June
30,
2015
ABSTRACT: Results of oxidation 2-(N-acetylamine)-3-(3,5-di-tert-butyl-4-hydroxyphenyl)-propionic acid oxygen depend on temperature. At 55℃- 60℃, 2,4-di-tert-butylbicyclo(4,3,1)deca-4,6-dien-8-(N-acetylamine)-3,9-dion-1-oxa is formed. The constitution is based on dates of spectrums 1Н and 13С NMR. At 95℃- 97℃, mixtures of 2,4-di-tert-butylbicyclo(4,3,1)deca-4,6-dien-8-(N-acetylamine)-3,9-dion-1-oxa and of 6,8-di-tert-butyl-3-(N-acetylamine)spiro(4,5)deca-1-oxa-5,8-dien-2,7-dione are produced. Structures are calculated by the method of Hartrii-Foka. Values of enthalpies and of entropies allow to assume dynamic isomerism.