Fmoc-Tyr(PO₃H₂)-OH

A useful derivative for the synthesis of phosphotyrosine peptides ^{[1,2,3,4,5,67]} by Fmoc SPPS. Pyrophosphate formation has been noted in peptides containing adjacent Tyr(PO₃H₂) residues ^[4,5]. An evaluation of the optimal coupling conditions for introduction of this residue has been made ^[6].

Associated Protocols and Technical Articles
Cleavage and Deprotection Protocols for Fmoc SPPS

Literature references

^[1] E. A. Ottinger, et al. (1993) Biochemistry, 32, 4354.
^[2] E. A. Ottinger, et al. (1995) Int. J. Peptide Protein Res., 46, 346.
^[3] F. Anjuere, et al. (1995) Anal. Biochem., 229, 61.
^[4] C. Garcia-Echeverria (1995) Lett. Pept. Sci., 2, 93.
^[5] R. M. Valerio, et al. (1995) Lett. Pept. Sci., 2, 33.
^[6] C. Garcia-Echeverria (1996) Lett. Pept. Sci., 2, 369.
^[7] L. F. Bonewald, et al. (1999) J. Peptide Res., 53, 161.

Color (visual): white to slight yellow to beige
Appearance of substance (visual): powder
Identity (IR): passes test
Enantiomeric purity: ≥ 99.5 % (a/a)
Purity (TLC(CMA1)): ≥ 95 %
Purity (TLC(0110)): ≥ 95 %
Assay (HPLC, area%): ≥ 95.0 % (a/a)
Solubility (1 mmole in 2 ml DMF): clearly soluble
Assay (acidimetric): ≥ 85.0 %
Water (K. F.): ≤ 2.0 %
Ethyl acetate (HS-GC): ≤ 0.5 %
Acetate (IC): ≤ 0.1 %

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Replaces: 04-12-1125

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