Outros constituintes químicos isolados de Lafoensia glyptocarpa Koehne (Lythraceae) e depsídeo e triterpenos isolados de Ouratea floribunda St. Hill (Ochnaceae)

Abstract

This research is related to the chemistry study of the shoots of Lafoensia glyptocarpa Koehne and Ouratea floribunda St. Hill. The products found is this phytochemistry research were isolated from MeOH extract of L. glyptocarpa and hexanic and AcOET extracts of O. floribunda by chromatography techniques. The structure were established by analysis of infrared, mass and NMR spectroscopy data of the natural products and its derivatives. From the leaves of L. glyptocarpa were isolated two saponins (3b-O-D-glicopyranosylsitosterol and 3b-O-b-Larabinopyranosylolean-12-en--28-O-b-D-glucopiranosyl-ester). The carbohydrates a e b-D-glucose and iditiol, were isolated from MeOH extract of wood of L. glyptocarpa. From the hexanic extract of wood of O. Floribunda were isolated a depside (atranorin) and the triterpenes friedelin, friedelinol, lupeol, taraxerol and taraxenone. The mixture of triterpenic esters also were identificit in from the flowers of O. floribunda. Toegther with the mixture of 3-O-hexadecanoate-olean-12-en-28- oic acid and 3-O-tetraeicosanoate-olean-12-en-28-oic acid beside the mixture of 2-hydroxy-3-O-acyl-olean-12-en-28-oic acid and 3-hydroxy-2-O-acyl-olean-12-en- 28-oic acid. Some of the isolated products were evaluated in a Artemia salina Leach assay. L. glyptocarpa has chemical products with alelopatic activities described in the literature. So the germination assays with cultivars of lettuce and tomato to avaluated synthetic products derivated from cinamic acid were done