Estudo do epicarpo e do mesocarpo externo do fruto de Caryocar brasiliense Camb. (pequi): síntese e biotransformação de isocariolanos e derivados para avaliação da atividade biológica

Abstract

This Thesis consists of two parts. In Part 1, the phytochemical study of mesocarpe and external epicarpe of pequi (Caryocar brasiliense Camb.) and their biological activity are described. This study led to the isolation of six pure compounds, ethyl gallate, 5-hydroxymethylfurfural, gallic acid, methyl shikimate, methyl gallate and four mixtures, -D-fructopiranose and -D-fructofuranose, - and -D-glucose, lupeol and oleic acid, -sitosterol and stigmasterol, contaminated with oleic acid. Biological assays for citotoxic, antioxidant, antimicrobial and allelopathicactivities were carried out for the crude extract, fractions and pure substances. In Part 2 of this thesis we describe chemical transformations and biotransformations (by using the fungus B. cinerea) of isocariolane compounds, resulting in 11 new products of chemical transformations, 5-hidroxycaryophylla-4(12),8(13)-diene, (8R,9R)-8-methoxyisocariolan-9-ol, isocaryolan-9-one,(1S,2S,5R,8S)-1,4,4-trimetyltriciclo[6.2.1.02,5] undecane-8-carbaldehyde, (8R,9R)- isocaryolan-8,9-diol, isocaryolan-9-ol, (1R,2S,5R,8S)-8-hydroxymethyl-1,4,4- trimethyltricicle[6.2.1.02,5]undecan, (8R,9R)-8-etoxyisocariolan -9-ol, (8R,9R)-8- propoxyisocariolan-9-ol, (8R,9R)-8-butoxyisocariolan-9-ol, (8R,9R)-8- pentoxyisocariolan-9-ol and 13 new biotransformation products, (4R,8R,9R)-8-metoxyisocariolan-9,15-diol, (3S,8R,9R)-isocaryolan-3,8,9-triol, (4R,8R,9R)- isocaryolan-8,9,15-triol, (6R,8S,9R)-isocaryolan-6,8,9-triol, (2R,5S, 8R,9R)- isocaryolan-5,8,9-triol, (6S,8S,9R)-isocaryolan-6,8,9-triol, (2S,4R,5R)-4- hydroxymethyl-1,4-dimethyltricycle[6.3.1.02,5]dodecan-9-one, (15R,9R)-isocaryolan-9,15-diol, (3S,9R)- isocaryolan-9,3-diol, (1S,2S,5R,6S,8S)-1-methyl- 4,4,8-trimethylentricycle[6.2.1.02,5]undeca-6,12-diol, (1R,2S,5R,6S,8R,9S)-1- methyl-4,4,8-trimethylentricycle[6.2.1.02,5]undeca-6,9,12-triol, (1R,2S,4R,5R,6S, 8S)-1-methyl-4,4,8-trimethylentricycle[6.2.1.02,5]undeca-6,15,12-triol, (1S,2S,5R,8S)-1-methyl-4,4,8-trimethylentricycle[6.2.1.02,5]undeca-12,14,15-triol .Bioassays to evaluate fungistatic and allelophatic activities of someisoariolanes isolated were carried out.