Estudo químico de leguminosas brasileiras: Crudia Amazônica, Aldina heterophylla, Aniba parviflora, Aniba burchellii

Abstract

This thesis presents studies related to the chemical composition of the trunk wood of the following four tree species in the Amazon region. Crudia amazonica (Leguminosae-Caesalpinioideae) containing 4 ', 5,7-trihydroxyflavone (CA-1). Aldina heterophylla (Leguminoseae-Caesalpinioideae) containing sitosterol (Ah-3-S), (+) - 3-hydroxy-8,9-methylene-dioxipterocarpan (Ah-4-S), (±) - 3-hydroxy-8 , 9-methylenedioxypterocarpan (Ah-5-S), (±) -3-hydroxy-9-methoxypterocarpan (Ah-6-S). Aniba parviflora (Lauraceae) containing benzyl benzoate 6-trans-styryl-2-pyrone (AP-1) 6- (4'-hydroxy-3'-methoxytrans-styryl-2-pyrone) (AP-2), 6 - (3'4'-methylenedioxy-trans-styryl) -2-pyrone (AP-3), 6- (4'-idroxy-trans-styryl) -2-pyrone (AP-5) 6-cis-styryl- 2-pyrone (AP-6), 6- (3 ', 4'-dihydroxy-trans-styryl) -2-pyrone (AP7). Aniba burchellii (Lauraceae) containing burchellin (2S, 3S) -4-allyl-5-methoxy-3-methyl-2-piperonyl-2,3,4,7-tetrahydro-7-oxobenzofuran, a substance whose isolation and whose elucidation structural problems have been previously described (32). Its pyrolysis produces (2S, 3S) -7-allyl-6-hyroxy-5-me-toxi-3-methyl-2-piperonyl-2,3-dihydrobenzofuran and (2S, 3S) - 2,3-dihydro- 6-hydroxy-5-methoxy-3-methyl-2-piperonylbenzo-furan through mechanisms that are discussed. The identifications of the mentioned substances were based on spectral measurements made both with the natural constituents themselves and with their derivatives, specially obtained for this purpose.