title: Synthesis and in vitro antioxidant activity of some new fused pyridine analogs.
abstract: A new series of pyrano[3,2-c]pyridines, pyrazolo[4,3-c]pyridines, and pyrido[4,3-d]pyrimidines were synthesized and screened for their in vitro antioxidant activity. Compounds 13, 14, 15, 23, 29, 30, and 31 exhibited the most active oxygen free-radical scavenger activity with percentage inhibitions of 99.4, 99.6, 99.8, 97.3, 99.0, 99.3, and 99.5%; respectively, which is comparable to the curcumin potency. Most of the tested compounds proved to be safe towards peripheral multinuclear neutrophils (PMNs). The detailed synthesis and antioxidant activity data are reported.
authors.affiliation: Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia.
authors.forename: Mohamed A
authors.initials: MA
authors.lastname: Al-Omar
authors.forename: Khairia M
authors.initials: KM
authors.lastname: Youssef
authors.forename: Magda A
authors.initials: MA
authors.lastname: El-Sherbeny
authors.forename: Sit Albanat A
authors.initials: SA
authors.lastname: Awadalla
authors.forename: Hussein I
authors.initials: HI
authors.lastname: El-Subbagh
mesh_terms: D000255:Adenosine Triphosphate / Q000378:metabolism; D000975:Antioxidants / Q000138:chemical synthesis* / Q000494:pharmacology*; D016166:Free Radical Scavengers / Q000138:chemical synthesis / Q000494:pharmacology; D006801:Humans; D066298:In Vitro Techniques; D007202:Indicators and Reagents; D008163:Luminescent Measurements; D009504:Neutrophils / Q000187:drug effects; D010084:Oxidation-Reduction; D011725:Pyridines / Q000138:chemical synthesis* / Q000494:pharmacology*; D013329:Structure-Activity Relationship
chemical_list: D000975:Antioxidants; D016166:Free Radical Scavengers; D007202:Indicators and Reagents; D011725:Pyridines; D000255:Adenosine Triphosphate