Stability of Re- and Re-DMSAs and removal of impurity in the product

Komoto, Kazuki*; Nogawa, Norio*; Sato, Jun*; Makide, Yoshihiro*; Morikawa, Naotake*; Hashimoto, Kazuyuki; Sorita, Takami

no journal, , 

Complex compound of Re and Re with meso-2,3-dimercaptosuccinic acid (DMSA) is expected to be effective against cancerous disease. This compound is synthesized with high radiochemical yield by use of SnCl as reducing reagent. However, the product contains a large amount of SnCl which is harmful to human body. The removal of tin impurity was tested with cation exchange resin. Re-DMSA complex was also obtained with high radiochemical yield by use of other harmless reducing agents (L-ascorbic acid, NaSO, HPO). Synthesized Re-DMSA by use of SnCl was stable in sodium acetate buffer for 5 hours, while survival amount of Re-DMSA synthesized by other reducing agents decreased in a short time.