title: A Dde resin based strategy for inverse solid-phase synthesis of amino terminated peptides, peptide mimetics and protected peptide intermediates.
abstract: This report describes a Dde resin based attachment strategy for inverse solid-phase peptide synthesis (ISPPS). This attachment strategy can be used for the synthesis of amino terminated peptides with side chains and the carboxyl terminus either protected or deprotected. Amino acid t-butyl esters were attached through their free amino group to the Dde resin. The t-butyl carboxyl protecting group was removed by 50% TFA, and inverse peptide synthesis cycles performed using an HATU/TMP based coupling method. Protected peptides were cleaved from the resin with dilute hydrazine. Side chain protecting groups could then be removed by treatment with TFMSA/TFA. The potential of this approach was demonstrated by the synthesis of several short protected and unprotected peptides in good yield and with low epimerization. Its potential for peptide mimetic synthesis was demonstrated by the synthesis of two peptide trifluoromethylketones.
authors.affiliation: Department of Pharmaceutical Sciences, University of Missouri-Kansas City, 5005 Rockhill Road, Kansas City, Missouri 64110-2265, USA.
authors.forename: Aman
authors.initials: A
authors.lastname: Rai
authors.forename: William G
authors.initials: WG
authors.lastname: Gutheil
mesh_terms: D040761:Biomimetic Materials / Q000138:chemical synthesis; D002851:Chromatography, High Pressure Liquid; D003512:Cyclohexanones / Q000737:chemistry*; D009842:Oligopeptides / Q000138:chemical synthesis; D010455:Peptides / Q000138:chemical synthesis* / Q000737:chemistry*
chemical_list: D003512:Cyclohexanones; D009842:Oligopeptides; D010455:Peptides