Photochemistry and Photobiology 2015-01-01

Photodegradation of Hydrophobic Pyridineketoximes in Toluene and Heptane.

Karolina Wieszczycka, Joanna Zembrzuska

Index: Photochem. Photobiol. 91 , 786-96, (2015)

Full Text: HTML

Abstract

The goal of the research was to study the reactivity of the hydrophobic 2- and 3-pyridineketoximes under exposure to UV-VIS light. The photodegradation was conducted in both toluene and heptane for 10 h under atmosphere of argon. Ten-hour irradiation experiments demonstrated that the pyridineketoximes underwent the facile E-Z photoisomerization, photo-Beckmann rearrangement, and to a lesser extent, the photosubstitution to the pyridine ring. From LC-MS and NMR analysis of the irradiated solutions, it was found that the photosubstitution proceeded to give the corresponding 6-substituted 2- or 3-pyridylketoxime via the replacement of the ring hydrogen by the benzyl or heptyl group. The photo-Beckmann rearrangement led to the formation of the corresponding amides, but also other products formed in the photo-decomposition reaction. © 2015 The American Society of Photobiology.

Related Compounds

  • Ammonium acetate
  • Methanol
  • Toluene
  • Tridecanal
  • Heptane

Related Articles:

Biomolecular imaging with a C60-SIMS/MALDI dual ion source hybrid mass spectrometer: instrumentation, matrix enhancement, and single cell analysis.

2014-11-01

[J. Am. Soc. Mass Spectrom. 25(11) , 1897-907, (2014)]

Comparative in vitro study on magnetic iron oxide nanoparticles for MRI tracking of adipose tissue-derived progenitor cells.

2014-01-01

[PLoS ONE 9(9) , e108055, (2014)]

Pharmacokinetics, biodistribution, and toxicity of folic acid-coated antiretroviral nanoformulations.

2014-12-01

[Antimicrob. Agents Chemother. 58(12) , 7510-9, (2014)]

Glucose and glycerol concentrations and their tracer enrichment measurements using liquid chromatography tandem mass spectrometry.

2014-10-01

[J. Mass Spectrom. 49(10) , 980-8, (2014)]

Construction and physiochemical characterisation of a multi-composite, potential oral vaccine delivery system (VDS).

2014-07-01

[Int. J. Pharm. 468(1-2) , 264-71, (2014)]

More Articles...