Hybrid molecules and other derivatives

Various hybrid molecules aimed at improving the bioactivities of flavonoids and to study redox interactions were synthesized in the laboratory and their properties investigated. Isoquercitrin esters with mono- or dicarboxylic or aromatic acids and their homologues (Vavříková 2016, Heřmánková-Vavříková 2017) were efficient inhibitors of lipid peroxidation with increased lipophilicity.

Selective galloylation at C7-OH increased the effect of 2,3-dehydrosilybin on human umbilical vein endothelial cells (Karas 2016, Pivodová 2016, Karas 2017).

We also prepared retinoyl-flavonolignan hybrids with improved antioxidant properties (Chambers 2019).

Finally, a series of antioxidants was designed and synthesized based on conjugation of silybin with L-ascorbic acid, trolox alcohol or tyrosol via a C-12 aliphatic linker. The silybin-ascorbic acid conjugate exhibited excellent electron donating ability and displayed the best activities (IC50 = 30 µM) in terms of lipid peroxidation inhibition (Vavříková 2017).