The generation of 2-indolylacyl radicals from the corresponding phenyl selenoesters under reductive conditions and their behavior in intramolecularaddition reactions to carbon-carbondoublebonds located at the indole nitrogen have been studied. [reaction: see text]
The synthesis of a tricyclic marine alkaloid, fasicularin, was accomplished. Stereoselective synthesis of the aza-spirocyclic BC-ring precursor and ensuing construction of the A-ring with stereocontrolled installation of the C2 hexyl group feature prominently in the synthesis.
Conformation-Based Restrictions and Scaffold Replacements in the Design of Hepatitis C Virus Polymerase Inhibitors: Discovery of Deleobuvir (BI 207127)
作者:Steven R. LaPlante、Michael Bös、Christian Brochu、Catherine Chabot、René Coulombe、James R. Gillard、Araz Jakalian、Martin Poirier、Jean Rancourt、Timothy Stammers、Bounkham Thavonekham、Pierre L. Beaulieu、George Kukolj、Youla S. Tsantrizos
DOI:10.1021/jm4011862
日期:2014.3.13
Conformational restrictions of flexible torsion angles were used to guide the identification of new chemotypes of HCV NS5B inhibitors. Sites for rigidification were based on an acquired conformational understanding of compound binding requirements and the roles of substituents in the free and bound states. Chemical bioisosteres of amide bonds were explored to improve cell-based potency. Examples are shown, including the design concept that led to the discovery of the phase III clinical candidate deleobuvir (BI 207127). The structure-based strategies employed have general utility in drug design.
Lewis acid induced ene cyclization of .omega.-olefinic trifluoromethyl ketones: access to bicyclic compounds bearing a trifluoromethyl group
作者:Ahmed Abouabdellah、Jean Pierre Begue、Daniele Bonnet-Delpon、Thierry Lequeux
DOI:10.1021/jo00020a021
日期:1991.9
Lewis acid induced ene cyclization of omega-olefinic trifluoromethyl ketones provides (trifluoromethyl)decalins and (trifluoromethyl)hydrindans in high yield. delta-(1-Cyclohexenyl) trifluoromethyl ketone 1a leads stereoselectively to 1-(trifluoromethyl)-1-hydroxy-DELTA-5,10-octalin 3a or 10-chloro-1-(trifluoromethyl)-1-hydroxydecalin 6a, depending on the choice of Lewis acid. gamma-(1-Cyclohexenyl) trifluoromethyl ketone 2a leads to a mixture of 9-chloro-1-(trifluoromethyl)-1-hydroxyhydrindans 10a and 11a. Similar reactions were performed successfully with the corresponding beta-keto esters 1b and 2b.