Stereoselective synthesis of a conformationally restricted β-hydroxy-λ-amino acid
摘要:
beta-Hydroxy-gamma-amino acids are a class of non-proteinogenic amino acids present in many important biologically active natural products. In conjunction with our research on didemnins, we designed and synthesized a sterically constrained beta-hydroxy-gamma-amino acid in which the requisite carboxyl, hydroxyl and amino groups are positioned on a conformationally stable 6-membered ring. (C) 1997 Elsevier Science Ltd.
Synthetic Routes to a Constrained Ring Analog of Didemnin B
作者:Scott C. Mayer、Amy J. Pfizenmayer、Madeleine M. Joullié
DOI:10.1021/jo951693i
日期:1996.1.1
The didemnin class of biologically active cyclodepsipeptides, isolated from a marine tunicate, has shown antitumor, antiviral, and immunosuppressive activities. Synthetic studies were undertaken to prepare a modified analog of one of the most potent congeners, didemninB (1). The side chain of the isostatine unit was tethered into the macrocycle viaa cyclohexane ring in order to provide a more rigid