title: Tandem Achmatowicz-Knoevenagel protocol: diastereoselective synthesis and anticancer evaluation of cyclopenta[b]pyrane derivatives.
abstract: Synthesis of cyclopenta[b]pyrane derivatives via Achmatowicz oxidative cyclization of furanols followed by intramolecular Knoevenagel condensation of the β-ketoester arm is examined. The extent of diastereoselectivity was dependent on the nature of the chiral atom within the tethering carbon of the pyrenone ring. In some cases, this process proceeds with a high degree of stereoselectivity after protection of the anomeric hydroxyl group. Furthermore, the cytotoxic activity of pyrazolone derivatives thereof was studied against HCT116 (human colorectal cancer cells), SK-N-SH (human Caucasian bone marrow neuroblastoma) cells and the non-tumorigenic cells (MCF10A).
authors.affiliation: College of Pharmacy, University of Sharjah, P.O. Box 27272, Sharjah, UAE. taltal@sharjah.ac.ae
authors.forename: Taleb H
authors.initials: TH
authors.lastname: Al-Tel
authors.forename: Mohammad H
authors.initials: MH
authors.lastname: Semreen
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Voelter
mesh_terms: D000970:Antineoplastic Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D001688:Biological Products / Q000737:chemistry; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D003517:Cyclopentanes / Q000138:chemical synthesis* / Q000494:pharmacology; D006801:Humans; D008958:Models, Molecular; D015394:Molecular Structure; D047069:Pyrazolones / Q000138:chemical synthesis; D013237:Stereoisomerism
chemical_list: D000970:Antineoplastic Agents; D001688:Biological Products; D003517:Cyclopentanes; D047069:Pyrazolones; C038362:pyrazolone