Useful Catalytic Enantioselective Cationic Double Annulation Reactions Initiated at an Internal π-Bond: Method and Applications
作者:Karavadhi Surendra、Goreti Rajendar、E. J. Corey
DOI:10.1021/ja4125093
日期:2014.1.15
The 1:1 complex of o,o'-dichloro-R-BINOL and SbCl5 initiates the enantioselective cationic polycyclization of polyunsaturated substrates at a predictable pi-bond which may be either terminal or, as shown herein, internal. The extension of this powerful construction to internal pi-bonds expands the scope of this method and opens up very short pathways to numerous chiral polycyclic molecules, including natural products and their analogues. Especially simple synthetic routes are disclosed that provide access to dysideapalaunic acid, dehydroabietic acid, and epipodocarpic acid and illustrate, the value of this enantioselective approach.
Isosteres of the DNA polymerase inhibitor aphidicolin as potential antiviral agents against human herpes viruses
作者:David L. Selwood、S. Richard Challand、John N. Champness、Janet Gillam、Deborah K. Hibberd、K. Singh Jandu、Denise Lowe、Michael Pether、John Selway、George E. Trantor
DOI:10.1021/jm00075a003
日期:1993.11
the compound with the greatest structural similarity to aphidicolin, showed any significant antiviral activity in primary assays. An enantioselective synthesis of the compound was carried out and the 4aS isomer 36 was shown to account for the observed antiviral activity noted againstherpes simplex virus 1 and human cytomegalovirus.