title: Design, synthesis, and vasorelaxant and platelet antiaggregatory activities of coumarin-resveratrol hybrids.
abstract: We have synthesized the coumarin-resveratrol hybrid 4 and its dimethoxy derivative 3 by a very direct synthetic route involving a Pechmann procedure. Compound 4 has also been synthesized by an alternative route (Perkin), which also allowed the synthesis of compounds 9-13. In addition, we have evaluated the potential vasorelaxant activity of the new compounds in endothelium-containing rat aorta rings pre-contracted with noradrenaline, as well as the inhibitory effects on platelet aggregation induced by thrombin in washed human platelets. The compounds reported here relaxed vascular smooth muscle and inhibited platelet aggregation with a profile similar to that of trans-resveratrol (t-RESV) and, in some cases, showed activity higher than that of the natural compound. This is the case for compound 13, which has a vasorelaxant activity that is twice as high as that of t-resveratrol and a platelet antiaggregant activity that is six times higher. These results suggest that these novel compounds may have potential as structural templates for the design and subsequent development of new vasodilatory and platelet antiaggregatory drugs.
authors.affiliation: Departamento de Química Orgánica, Facultad de Farmacia, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain. qosanti@yahoo.es
authors.forename: Santiago
authors.initials: S
authors.lastname: Vilar
authors.forename: Elías
authors.initials: E
authors.lastname: Quezada
authors.forename: Lourdes
authors.initials: L
authors.lastname: Santana
authors.forename: Eugenio
authors.initials: E
authors.lastname: Uriarte
authors.forename: Matilde
authors.initials: M
authors.lastname: Yánez
authors.forename: Nuria
authors.initials: N
authors.lastname: Fraiz
authors.forename: Carlos
authors.initials: C
authors.lastname: Alcaide
authors.forename: Ernesto
authors.initials: E
authors.lastname: Cano
authors.forename: Francisco
authors.initials: F
authors.lastname: Orallo
mesh_terms: D000818:Animals; D001013:Aorta, Thoracic / Q000187:drug effects; D001792:Blood Platelets / Q000187:drug effects; D003374:Coumarins / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D015195:Drug Design; D004353:Drug Evaluation, Preclinical; D006801:Humans; D015394:Molecular Structure; D009131:Muscle, Smooth, Vascular / Q000187:drug effects; D009638:Norepinephrine / Q000037:antagonists & inhibitors / Q000494:pharmacology; D010974:Platelet Aggregation / Q000187:drug effects*; D010975:Platelet Aggregation Inhibitors / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D051381:Rats; D000077185:Resveratrol; D013267:Stilbenes / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D013917:Thrombin / Q000037:antagonists & inhibitors / Q000494:pharmacology; D013997:Time Factors; D014665:Vasodilator Agents / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D014666:Vasomotor System / Q000187:drug effects* / Q000502:physiology
chemical_list: D003374:Coumarins; D010975:Platelet Aggregation Inhibitors; D013267:Stilbenes; D014665:Vasodilator Agents; C030123:coumarin; D013917:Thrombin; D000077185:Resveratrol; D009638:Norepinephrine