title: A highly efficient, asymmetric synthesis of benzothiadiazine-substituted tetramic acids: potent inhibitors of hepatitis C virus RNA-dependent RNA polymerase.
abstract: [reaction: see text] An efficient two-pot, asymmetric synthesis of benzothiadiazine-substituted tetramic acids is reported. Starting from commercially available alpha-amino acids or esters, reductive amination followed by a novel one-pot amide bond formation/Dieckmann cyclization provided the desired products in high yield and optical purity. An analogous solid-phase approach to the same targets is also presented. These compounds were found to be potent inhibitors of hepatitis C virus RNA-dependent RNA polymerase.
authors.affiliation: Department of Medicinal Chemistry, GlaxoSmithKline Pharmaceuticals, 1250 South Collegeville Road, P.O. Box 5089, Collegeville, Pennsylvania 19426-0989, USA. Duke_M_Fitch@gsk.com
authors.forename: Duke M
authors.initials: DM
authors.lastname: Fitch
authors.forename: Karen A
authors.initials: KA
authors.lastname: Evans
authors.forename: Deping
authors.initials: D
authors.lastname: Chai
authors.forename: Kevin J
authors.initials: KJ
authors.lastname: Duffy
mesh_terms: D000998:Antiviral Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D001581:Benzothiadiazines / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D020650:Combinatorial Chemistry Techniques; D003500:Cyclization; D016174:Hepacivirus / Q000187:drug effects* / Q000201:enzymology; D015394:Molecular Structure; D011760:Pyrrolidinones / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D012324:RNA-Dependent RNA Polymerase / Q000037:antagonists & inhibitors*
chemical_list: D000998:Antiviral Agents; D001581:Benzothiadiazines; D011760:Pyrrolidinones; C009435:tetramic acid; D012324:RNA-Dependent RNA Polymerase