Metal complexes having vitamin b12 as a ligand

C - Chemistry – Metallurgy – 07 – F

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C07F 19/00 (2006.01) A61K 49/00 (2006.01) C07D 487/22 (2006.01)

Patent

CA 2552916

The present invention relates to a metal complex of the general formula M(L)n, wherein each L is independently selected and represents a ligand and at least one L is vitamin B12(cyanocobalamin) or a derivative thereof bound through the nitrogen atom of its cyanide group to M, which is an element selected from the transition metals, thus, forming a M-NC-[Co] moiety with [Co] representing vitamin B12 without cyanide and wherein n is 1, 2, 3, 4, 5 or 6. The complex can be prepared by mixing a precursor molecule with vitamin B12. The metal complexes can be used for radiodiagnostics, chemotherapy and radionuclide therapy.

La présente invention concerne un complexe métallique représenté par la formule générale M(L)¿n?, dans laquelle L est sélectionné indépendamment et désigne un ligand et au moins un L désigne de la vitamine B¿12? (cyanocobalamine) ou un de ses dérivés liée par l'atome d'azote de son groupe cyanure à M, qui est un élément sélectionné parmi les métaux de transition, formant ainsi une fraction M-NC-[Co] dans laquelle [Co] désigne de la vitamine B¿12? sans cyanure et n vaut 1, 2, 3, 4, 5 ou 6. Ce complexe peut être préparé par mélange d'une molécule-précurseur avec de la vitamine B¿12?. Les complexes métalliques peuvent être utilisés dans des radiodiagnostics, des chimiothérapies ou des thérapies par radionucléides.

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