Solid phase synthesis of a ΨCH2NH pseudopeptide by ligation of a peptidyl aldehyde with a resin-bound amino peptide

Abstract Solid phase synthesis of Ψ[CH 2 NH] pseudopeptide 3 was accomplished by reductive amination of peptidyl aldehyde 1 with resin bound amino peptide 2 . No epimerization took place during the aldehyde preparation or the reductive amination step. This convergent strategy should facilitate the synthesis of analogues of the neuropeptide PACAP.