Description

• General description: An excellent building block for the preparation of phosphoserine-containing peptides [1] by Fmoc SPPS. This derivative can be introduced using standard activation methods, such as PyBOP® and TBTU. The monoprotected phosphoserine residue once incorporated is stable to piperidine. Using this reagent, even peptides containing multiple phosphorylation sites can be prepared efficiently by standard Fmoc SPPS methods [2]. Applications of this derivative include the preparation of phospholamban [3], a 52 residue peptide containing both phosphoserine and phosphothreonine, and human salivary statherin, a 42 residue phosphoserine peptide [4]; for other examples see references [5,6,7,8].Recently, β-piperidinylalanine formation has been shown to occur during Fmoc deprotection of N-terminal Ser(PO(OBzl)OH), particularly under microwave conditions. This side reaction can be eliminated by using cyclohexylamine or DBU just for this Fmoc deprotection step [9]. Associated Protocols and Technical ArticlesCleavage and Deprotection Protocols for Fmoc SPPSLiterature references[1] T. Wakamiya, et al. (1994) Chem. Lett., 1099. [2] P. White & J. Beythien in ′Innovations & Perspectives in Solid Phase Synthesis and Combinatorial Libraries, 4th International Symposium′, Mayflower Scientific Ltd., Birmingham, 1996, pp. 557. [3] H. Schmid, et al., Poster 423 presented at the 15th American Peptide Symposium, Nashville, 1997. [4] T. L. Gururaja & M. J. Levine (1996) Pept. Res., 9, 283. [5] T. Vorherr, et al. (1995) Bioorg. Med. Chem. Lett., 5, 2661. [6] G. Shapiro, et al. (1996) Bioorg. Med. Chem. Lett., 6, 409. [7] M. John, et al. (1996) Pept. Res., 9, 71. [8] K. Teruya, et al. (2004) J. Pept. Sci., 10, 479. [9] T. J. Attard, et al. (2009) Int. J. Pept. Res. Ther., 15, 69.
• Linkage: Replaces: 04-12-1154
• Analysis Note: Colour (visual): white to slight yellow to beigeAppearance of substance (visual): powderIdentity (IR): passes testEnantiomeric purity: ≥ 99.0 % (a/a)Purity (TLC(CMA1)): ≥ 97 %Assay (HPLC, area%): ≥ 95.0 % (a/a)Solubility (1 mmole in 2 ml DMF): clearly solubleAssay (acidimetric): ≥ 90.0 %Water (K. F.): ≤ 1.0 %Ethyl acetate (HS-GC): ≤ 0.5 %Acetate (IC): ≤ 0.1 %To see the solvent systems used for TLC of Novabiochem® products please click here.
• Legal Information: Novabiochem is a registered trademark of Merck KGaA, Darmstadt, Germany