Inhibitors of hepatitis C virus NS3·4A protease. Part 3: P2 proline variants
摘要:
We recently described the identification of an optimized alpha-ketoamide warhead for our series of HCV NS3(.)4A inhibitors. We report herein a series of HCV protease inhibitors incorporating 3-alkyl-substituted prolines in P-2. These compounds show exceptional enzymatic and cellular potency given their relatively small size. The marked enhancement of activity of these 3-substituted proline derivatives relative to previously reported 4-hydroxyproline derivatives constitutes additional evidence for the importance of the S-2 binding pocket as the defining pharmacophore for inhibition of the NS3(.)4A enzyme. (C) 2004 Elsevier Ltd. All rights reserved.
Intramolecular carbolithiation reactions for the preparation of 3-alkenylpyrrolidines
作者:Iain Coldham、Kathy N. Price、Richard E. Rathmell
DOI:10.1039/b303670g
日期:——
Tin–lithium exchange allows the formation of α-amino-organolithium species that undergo anionic cyclization onto allylic ethers to give 3-alkenylpyrrolidines. The methodology has been applied to the synthesis of an advanced intermediate related to the natural product (–)-α-kainic acid.