Synthesis and evaluation of backbone/amide-modified analogs of leualacin
摘要:
Leualacin (1), a cyclic depsi-pentapeptide, and its backbone/amide-modified analogs 2-4 were synthesized. Amide analogue 3 exhibited stronger vasodilatory effects. It also strongly inhibited collagen- and arachidonic acid (AA)induced platelet aggregations with IC(50)s of 0.6 mu M and 2.0 mu M, respectively (C) 1999 Elsevier Science Ltd. All rights reserved.
Total Synthesis of the Cyclic Depsipeptide Leualacin
摘要:
The fungal metabolite leualacin (1), a potent calcium channel antagonist, was synthesized in 15 steps from commercially available amino acids in 25% overall yield using standard solution methods. The synthesis is general and thus would accommodate the incorporation of amino acid replacements as well as the inclusion of peptide mimics and isosteres.