Method for production of peptide thioester compound

Chemistry: natural resins or derivatives; peptides or proteins; – Peptides of 3 to 100 amino acid residues – Synthesis of peptides

Reexamination Certificate

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C530S345000

Reexamination Certificate

active

08058394

ABSTRACT:
The present invention provides a process for producing a peptide thioester compound. The process involves: (A) forming a peptide by a solid-phase synthesis method using a resin modified with a linker represented by the formula (1) as a solid phase:wherein R1represents C1-4alkyl group, R2represents hydrogen atom or C1-4alkoxy group, and n represents an integer of 1 to 4; (B) cleaving a bond between the solid phase and the peptide with at least one acid selected from dilute hydrochloric acid, dilute sulfuric acid, formic acid, and acetic acid to produce a peptide having a carboxyl group at the C-terminus; and (C) reacting a thiol compound with the peptide at −100 to 0° C. in the presence of a condensing agent in a solvent.

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Clippingdale, Andrew B., et al.—“Peptide Thioester Preparation by Fmoc Solid Phase Peptide Synthesis for Use in Native Chemical Ligation”,Journal of Peptide Science, 6: pp. 225-234; (2000).
Ingenito, Raffaele, et al.—“Solid Phase Synthesis of Peptide C-Terminal Thioesters by Fmoc/t-Bu Chemistry”—Journal American Chemical Society—pp. 11369-11374.—Nov. 25, 1999.
Mezzato, Stefano, et al.—“An Orthogonal Double-Linker Resin Facilitates the Efficient Solid-Phase Synthesis of Complex-Type N-Glycopeptide Thioesters Suitable for Native Chemical Ligation”—Angew. Chem. Int. Ed.—vol. 44, pp. 1650-1654.—2005.
Futaki, Shiroh, et al.—“Preparation of Peptide Thioesters using Fmoc-Solid-Phase Peptide Synthesis and its Application to the Construction of a Template-Assembled Synthetic Protein (TASP)”—Tetrahedron Letters., vol. 44, pp. 6237-6240.—1997.
Von Eggelkraut-Gottanka, Regula, et al.—“Peptide Thioester Formation Using Standard Fmoc-chemistry”—Tetrahedron Letters 44 (Feb. 28, 2003), pp. 3551-3554.
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Riniker, Bernhard, et al.—“A General Strategy for the Synthesis of Large Peptides: The Combined Solid-Phase and Solution Approach.”—Tetrahedron Letters vol. 49, No. 41, (Apr. 22, 1993), pp. 9307-9320.
Nakahara, Yoshiaki,—“Problems and Progress in Glycopeptide Synthesis”—Trends in Glycoscience and Glycotechnology, vol. 15, No. 85, (Sep. 2003), pp. 257-273.
Kajihara, Yasuhiro, et al.—“Prompt Chemoenzymatic Synthesis of Diverse Complex-Type Oligosaccharides and Its Application to the Solid-Phase Synthesis of a Glycopeptide with Asn- Linked Sialyl-undeca- and Asialo-nanasaccharides”—Chem. Eur. Journal, vol. 10, (2004), pp. 971-985.
Kajihara, Yasuhiro, et al. —“Convenient Synthesis of a Sialylglycopeptide-thioester Having an Intact and Homogeneous Complex-type Disialyl-Oligosaccharide”—Carbohydrate Research 341 (2006), pp. 1333-1340.

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