Synthesis and characterization of constrained cyclosporin A derivatives containing a pseudo-proline group
作者:Luc Patiny、Jean-François Guichou、Michael Keller、Olivier Turpin、Thomas Rückle、Philippe Lhote、Timo M. Buetler、Urs T. Ruegg、Roland M. Wenger、Manfred Mutter
DOI:10.1016/s0040-4020(03)00770-1
日期:2003.7
The chemical synthesis, conformational analysis and receptor binding studies of novel constrained cyclosporin A (CsA) analogues are described. The selective insertion of pseudo-proline (ΨPro) systems featuring different 2-C-substituents at the oxazolidine ring exerts dramatic effects upon the backbone conformation as demonstrated by NMR analysis. It is shown that the insertion of a ΨMeMepro at position
27% of NEtXaa4-cyclosporin A derivatives (Xaa=Leu, Val, Ile, Thr) starting from cyclosporin A is described. Biological activities of the new analogues show promising results for the design of cyclosporin derivatives exhibiting non-immunosuppressive and anti-HIV activity.