Synthesis of a Hydroxyethylene Isostere of the Tripeptide Arg-Gly-Leu via a Convergent Acyl-like Radical Addition Strategy
作者:Christina M. Jensen、Karl B. Lindsay、Peter Andreasen、Troels Skrydstrup
DOI:10.1021/jo0505775
日期:2005.9.1
important fragment of a novel cyclic-peptide-based uPA inhibitor, was synthesized in few steps employing as the key step a samarium diiodide promoted coupling of either the 4-thiopyridyl ester of Nα-Fmoc- or Nα-Cbz-protected l-ornithine with the N-acryloyl derivative of l-leucine methyl ester. Epimerization under the coupling conditions at the chiral center in the α-position to the ketone was demonstrated
Formal Total Synthesis of the Potent Renin Inhibitor Aliskiren: Application of a SmI<sub>2</sub>-Promoted Acyl-like Radical Coupling
作者:Karl B. Lindsay、Troels Skrydstrup
DOI:10.1021/jo060296c
日期:2006.6.1
A formal totalsynthesis of the potent renin inhibitor aliskiren is disclosed exploiting an alternative coupling strategy recently developed by this laboratory for the preparation of the hydroxyethylene isostere-based class of protease inhibitors. The thioester derivative of the amino acid representing the C5−C9 fragment of the aliskiren carbon skeleton underwent a carbon chain extension via a SmI2-promoted