Conversion of Natural Aldehydes from Eucalyptus citriodora, Cymbopogon citratus, and Lippia multiflora into Oximes: GC-MS and FT-IR Analysis †

Molecules

Igor W. Ouédraogo¹  Michael Boulvin¹  Robert Flammang¹  Pascal Gerbaux¹ 

[1] ¹Laboratoire de Chimie Organique: Structure et Réactivité; UFR-SEA, Université de Ouagadougou, 03 BP 7021, Ouagadougou 03, Burkina Faso ²Laboratoire de Chimie Organique, Centre de Spectrométrie de Masse, Université de Mons, Place du Parc 20, B-7000 Mons, Belgium ^†Dedicated to the memory of Prof. Guy Ourisson, Strasbourg, France (1926-2006), an inspiring mentor.

关键词: essential oils;    aldehydes;    GC-MS;    oximes;    nitriles;   

DOI  :  10.3390/molecules14093275

来源: mdpi

【 摘 要 】

Three carbonyl-containing extracts of essential oils from Eucalyptus citriodora (Myrtaceae), Cymbopogon citratus (Gramineae) and Lippia multiflora (Verbenaceae) were used for the preparation of oximes. The reaction mixtures were analyzed by GC-MS and different compounds were identified on the basis of their retention times and mass spectra. We observed quantitative conversion of aldehydes to their corresponding oximes with a purity of 95 to 99%. E and Z stereoisomers of the oximes were obtained and separated by GC-MS. During GC analysis, the high temperature in the injector was shown to cause partial dehydratation of oximes and the resulting nitriles were readily identified. Based on FT-IR spectroscopy, that revealed the high stability and low volatility of these compounds, the so-obtained oximes could be useful for future biological studies.

【 授权许可】

CC BY   
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.