Synthesis of radiolabeled sugar metal complexes
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United States of America Patent
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Issued Date -
Mar 9, 2006
app pub date -
Sep 7, 2005
filing date -
Sep 7, 2004
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Abstract
The invention provides a method for manufacturing or preparing neutral, low molecular weight .sup.99mTc-labeled and .sup.186Re-labeled carbohydrate complexes with an improved radiochemical yield from a simple functionalized sugar, such as glucosamine. In particular the synthesis relies on single ligand transfer (SLT) or double ligand transfer (DLT) reactions for converting a ferrocene compound into a rhenium or technetium tricarbonyl complex. The ferrocene compound may be linked to a sugar through various functional groups including, for example, thio, amino and alcohol functionalities to provide a wide range of radiolabeled sugar complexes that include both water soluble and relatively water insoluble compounds.
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