Izdebski J, Gers T, Kunce D, Markowski P. New tris-alkoxycarbonyl arginine derivatives for peptide synthesis.
J Pept Sci 2004;
11:60-4. [PMID:
15635728 DOI:
10.1002/psc.585]
[Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
alpha-Alkoxycarbonyl protected ornithines were treated with N,N'-[Z(2Cl)](2)-S-methylisothiourea and N,N'-[Z(2Br)](2)-S-methylisothiourea, N,N'-Z(2)-S-methylisothiourea and N,N'-Boc(2)-S-methylisothiourea to form N(alpha, omega, omega')-tris-alkoxycarbonyl arginines. Two of them, Boc-Arg-{omega,omega'-[Z(2Br)](2)}-OH and Boc-Arg-{omega,omega'-[Z(2Cl)](2)}-OH, were used for the synthesis of dermorphin fragments containing two or three arginine residues. Examination of the products by HPLC and ESI-MS revealed that the purity of the materials obtained with the use of the new derivatives was higher than that obtained in concurrent syntheses in which Boc-Arg(Tos) was used.
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