Chirospecific Synthesis of Spirocyclic β-Lactams and Their Characterization as Potent Type II β-Turn Inducing Peptide Mimetics
作者:Holger Bittermann、Peter Gmeiner
DOI:10.1021/jo0517287
日期:2006.1.1
Starting from natural proline, a practical chirospecificsynthesis of spirocyclic β-lactams of type 2 is described when a methylene moiety showing minimal steric demand is employed as a constraint element for adjusting the dihedral angle Ψ(i + 1). Employing the concept of self-reproduction of chirality, C-formylation of the oxazolidinone 5 afforded the key intermediate 7 taking advantage of an intermediate