Radical Anions from Urea-type Carbonyls: Radical Cyclizations and Cyclization Cascades
作者:Huan-Ming Huang、Joseph J. W. McDouall、David J. Procter
DOI:10.1002/anie.201800667
日期:2018.4.23
carbonyls by reductive electron transfer are exploited in carbon–carbon bond formation. New radical cyclizations of urea radical anions deliver complexnitrogenheterocycles and, depending upon the proton source used in the reactions, a chemoselective switch between reaction pathways can deliver two heterobicyclic scaffolds. A computational study has been used to investigate the selectivity of the urea
A new chiral tethered 8-quinolinol-based ligand class is developed. The binuclear titanium complex of the ligand operates through a novel mechanism allowing for the regio- and stereoselective epoxidation of primary and tertiary homoallylic alcohols (up to 98% ee), as well as first examples of 2-allylic phenols (up to 92% ee). The new catalyst system also promotes the asymmetric oxidation of gamma-hydroxypropyl sulfides giving an important class of chiral sulfoxides that have been inaccessible to date (up to 95% ee).
BACE INHIBITORS
申请人:Eli Lilly and Company
公开号:EP2451793A1
公开(公告)日:2012-05-16
[EN] BACE INHIBITORS<br/>[FR] INHIBITEURS DE BACE
申请人:LILLY CO ELI
公开号:WO2011005738A1
公开(公告)日:2011-01-13
The present invention provides BACE inhibitors of Formula I: methods for their use, intermediates, and methods for their preparation.