title: Cyclic peptide synthesis with thioacids.
abstract: C-Terminal amino acid 9-fluorenylmethylthioesters may be carried through Boc chemistry solution phase peptide synthesis sequences. After insertion of the final residue in the form of an Fmoc carbamate, treatment with piperidine releases a seco-peptide as a C-terminal thioacid that on treatment with Sanger's reagent undergoes cyclization to a cyclic peptide. Cyclic penta- and hexapeptides have been synthesized in this manner, as has a cyclic glycopeptide. Functional group compatibility with alcohols and carboxylic acids is demonstrated.
authors.affiliation: Centre de Recherche de Gif, Institut de Chimie des Substances Naturelles, CNRS, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France.
authors.forename: Kaname
authors.initials: K
authors.lastname: Sasaki
authors.forename: David
authors.initials: D
authors.lastname: Crich
mesh_terms: D000595:Amino Acid Sequence; D007202:Indicators and Reagents / Q000737:chemistry; D009842:Oligopeptides / Q000138:chemical synthesis / Q000737:chemistry; D010456:Peptides, Cyclic / Q000138:chemical synthesis* / Q000737:chemistry; D013457:Sulfur Compounds / Q000737:chemistry*
chemical_list: D007202:Indicators and Reagents; D009842:Oligopeptides; D010456:Peptides, Cyclic; D013457:Sulfur Compounds