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Advisor(s)
Abstract(s)
Chromone and xanthone derivativas are well-known for their outstanding antioxidant
properties. ln an effort to develop new antioxidants with improved efficacy, here we
cteveloped a new synthetic strategy to prepare hydroxylated chromones 3 and xanthones 4
with extended conjugated rr-systems. The synthetic strategy involved the aldolcondensation
of 2-methylchromones 1 with cinnamaldehyde 2 to give chromones 3.
Subsequent electrocyclization and oxidation of chromones 3 afforded xanthones 4 (Fig. 1 ).
The scavenging activities of both derivativas 3 and 4 were addressed against both reactive
oxygen species (ROS) and reactive nitrogen species (RNS). Ali tested compounds exhibited
scavenger effects dependent on the concentration, with ICso values found in the micromolar
range [1].
Description
Keywords
Antioxidant Hydroxychromone Xanthone derivativas
Citation
Albuquerque, Hélio; Proença, Carina; Ribeiro, Daniela; Freitas, Marisa; Santos, Clementina M.M.; Fernandes, Eduarda; Silva, Artur (2018). Design, synthesis and preliminar antioxidant evaluation of new hydroxy- chromone and xanthone derivatives. IN 28th European Colloquim on Heterocyclic Chemistry. Lecce, Italy