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Syntheses and structures of technetium(V) and rhenium(V) oxo complexes of peptide having KYC-sequence
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Tsutomu Takayama
Published/Copyright:
September 25, 2009
Technetium(V) and rhenium(V) oxo complexes of a peptide having a KYC-sequence such as KYCAR (H3L5) and KYCAREPPTRTNAYWGQG-NH2 (H3L18) were synthesized, and structures of the complexes were characterized by spectroscopic techniques. All of the complexes were synthesized by the ligand exchange reaction of [(n-C4H9)4N][MOCl4] (M = 99Tc, Re) with peptide in methanol or dimethylformamide solution. These complexes have a square pyramidal structure with an oxo ligand at the apical position. The peptide is coordinated to a metal atom through Namine of lysine, Sthiol of cysteine, and Namide of tyrosine and cysteine in the equatorial plane. A lysine (CH2)4NH2 group of the L5 ligand has the syn conformation with respect to metal-oxo bonding in the complex. The syn isomer was selectively formed in the ligand exchange reaction. The conversion of the syn isomer to the anti isomer was observed only for syn-[ReO(L5)], in which the coordination of water to the trans position of the oxo ligand was involved.
Published Online: 2009-9-25
Published in Print: 2000-3-1
© 2015 Oldenbourg Wissenschaftsverlag GmbH, Rosenheimer Str. 145, 81671 München
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- Possibility of production of 81Rb via the 80Kr(d,n) reaction at a small cyclotron
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- Physicochemical and radiochemical aspects of separation of radioiodine from TeO2-targets
- Novel separation of thallium-201 using p-tert-butylcalix[4]arene derivative
- Recovery of 201Tl by ion exchange chromatography from proton bombarded thallium cyclotron targets
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- 11C-methane production in small volume, high pressure gas targets
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- Specific activity of [11C]CO2 generated in a N2 gas target: effect of irradiation dose, irradiation history, oxygen content and beam energy
- Effect of dissolved gas on the specific activity of N-13 labeled ions generated in water by the 16O(p,α)13N reaction
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