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Iridoids from Hymenodictyon floribundum
Borges,Cristina M. P.; Diakanawma,Carlos; Mendonça,Dina I. M. D. deTwo new iridoids floribundane A (1) and floribundane B (2) and the known compounds lupenone (3), scopoletin (4) and 4,5-dihydroblumenol A (5) were isolated from trunk bark and leaves of Hymenodictyon floribundum B.L. Rob. The structures of all compounds were established from their spectroscopic data.
Electroepoxidation of natural and synthetic alkenes mediated by sodium bromide
Massuquinini, Inês; Mendonça, António J.; Esteves, Ana Paula; Mendonça, Dina I.; Medeiros, Maria JoséElectroepoxidation of synthetic alkenes (styrene, trans-stilbene and trans-b-methylstyrene) and of some natural terpenes (limonene, terpinolene, geraniol, a-terpinene, g-terpinene and a-terpineol) mediated by sodium bromide was performed in MeCN:H2O (4:1) at platinum electrodes. The indirect electrochemical oxidation of the olefins led to the corresponding epoxides in yields ranging from 23% to 79%. ; L’électr...
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