9 research outputs found
Reductive Coupling Reactions of 2-Nitrochalcones and their β-Hydroxy-analogues: New Syntheses of 2-Arylquinoline and 2-Aryl-4-hydroxyquinoline Derivatives
No full textEfficient Synthesis of Nitroflavones by Cyclodehydrogenation of 2′-Hydroxychalcones and by the Baker-Venkataraman Method
No full textSynthesis of flavonoid-type compounds from methyl dehydroabietates
No full textThe synthesis of new flavone-type compounds bearing several chiral centres, 12- and 14-(2'-chromonyl)dehydroabietates, are reported. This synthesis started from the aldol condensation of methyl 12- and 14-formyldehydroabietates with 2'-hydroxyacetophenones in order to prepare the corresponding chalcone-type compounds, which were then transformed in the expected flavone-type compounds by cyclodehydrogenation with DMSO and a catalytic amount of iodine. All compounds were exhaustively characterised by NMR and MS techniques.FCT/FEDER - Organic Chemistry Research UnitFCT/FEDER - PRAXIS XXI/BD/15786/9
Analytical Methods Applied to the Chemical Characterization and Antioxidant Properties of Three Wild Edible Mushroom Species from Northeastern Portugal
No full textComparison of different drying methods on the chemical and sensory properties of chestnut (Castanea sativa M.) slices
No full textAnalysis of Ascorbic Acid and Isoascorbic Acid in Orange and Guava Fruit Juices Distributed in Thailand by LC-IT-MS/MS
No full text
