Isolamento, caracterização, quantificação e avaliação da pureza enantiomérica de linalol, carvona e limoneno em óleos essenciais de espécies aromáticas

• Autor(a) principal: Silva, Givanildo Batista da
• Data de Publicação: 2011
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFS
• Texto Completo: https://ri.ufs.br/handle/riufs/6165
• topic: Pureza enantiomérica; Quantificação; Espécies aromáticas; Óleos essenciais; Linalol; Carvona; Limoneno; Enantiomeric purity; Quantification; Aromatic species; Essential oils; Linalool; Carvone; Limonene; CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA

This study involved the isolation, characterization, quantification and evaluation of the enantiomeric purity of linalool in the essential oil of aromatic species Lippia alba (Mill.) NE Brown (chemotype linalol-1,8-cineole), Ocimum basilicum L., Pelargonium graveolens L'Herit, Cinnamomum camphora Nees and Eberm var. linaloolifera Fujita, Aniba rosaeodora Ducke and Coriandrum sativum L., and carvone and limonene in the essential of Lippia alba (chemotype carvone-limonene). The quantification of monoterpenes was performed by GC-FID method for the internal standard. The analytical curves for quantification were linear in the range 1.0 to 10.0 mg mL-1 and showed appropriate values of correlation coefficients (0.996 to 0.999). The linalool was found with 91.38% (w/w) in essential oil of A. rosaeodora, 84.00% in C. camphora, 79.25% in L. alba, 79.00% in C. sativum, 73.33% in O. basilicum and 13.60% in P. graveolens. The carvone showed 58.13% and limonene showed 31.71% (w/w) of essential oil of L. alba. The enantiomeric purity analysis performed by GC-FID, using a column with enantioselective phase (β-cyclodextrin) and co-injection with commercial patterns, revealed the presence of the enantiomer (S)-(+)-linalool in L. alba and (R)-(-)-linalool in O. basilicum and C. camphora. The two enantiomeric forms of linalool were found in the P. graveolens, A. rosaeodora and C. sativum species. In the L. alba species (chemotype carvone-limonene) was observed a single enantiomeric form (R)-(-)-carvone and limonene showed the enantiomeric forms (S)-(-)-limonene and (R)-(+)-limonene, with predominance of the latter. The linalool was isolated from the essential oil of L. alba by TLC and subjected to analysis of GC-MS, GC-FID, 1H and 13C NMR and [α]D, which elucidated its structure and stereochemistry. The (S)-(+)-linalool isolated from L. alba (> 99%) was used to obtain the analytical curve. This isolation was necessary due to unavailability of acquire the (S)-(+)-linalool commercially pure.