Chemical composition of the essential oils from Amazonian aromatic plants / Estudo da composição quimica de oleos essenciais de plantas aromaticas da Amazonia

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

This work involved the chemical composition study of the following five aromatics plants Aeollanthus suaveolens, Aniba canelilla, Aniba rosaeodora, Lippia alba and Ocimum basilicum using Gas Chromatography / Mass Spectrometry (GC-MS). Samples of these plants - essential oils, fresh and dried plants as well as extraction residues - were extracted using Headspace Solid Phase Microextraction (HS-SPME) and analyzed with GC-MS. The oils were extracted by steam distillation. The essential oils of A. rosaeodora (wood and leaves), L. alba and O. basilicum rich in linalool were evaluated by GC-MS using HP-5 column, while the linalool enantiomer composition using a chiral column. From the results of this comparison the replacement of A. rosaeodora essential oil from its wood by the plants listed above was evaluated. A seasonal study of L. alba to define linalool concentrations and chirality was made using six different samples. The main molecules of the essential oils and/or extracts of A. canelilla (1-nitro-2-phenyethane and methyl eugenol) and A. suaveolens (massoia lactone) were isolated using separation techniques as distillation, hydrodistillation, acid-base extraction, column chromatography and preparative thin layer chromatography, and identified by NMR H and C. The semi-synthesis of the massoia lactone was obtained from a commercial molecule (d-decalactone). Biological assays - anti-fungal and antibacterial - with samples of A. canelilla and A. suaveolens were conducted using the diffusion technique in discs

ASSUNTO(S)

cg-em oleo essencial composição quimica plantas aromaticas chemical composition essential oil aromatic plants

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