Add time:07/28/2019         Source:sciencedirect.com

For the development of 62Cu labeled fatty acid analogs, two fatty acid analogs, containing dithiosemicarbazone (DTS) molecule as the 62Cu coordinating site, were designed and synthesized: a fatty acid analog containing DTS molecule at the omega-position, (a) the 12,13-dioxotetradecanoic acid di(N-methyl-thiosemicarbazone) (FA-DTS), and an ω-phenyl fatty acid analog containing DTS molecule at the para-position, (b) the p-carboxyundecylphenylglyoxal-di(N-methylthiosemicarbazone) (PFA-DTS). FA-DTS was synthesized by the reaction of ethyl diethoxyacetate with ethyl 11-bromoundecanate by successive decarboxylation and hydrolysis, and final condensation with N-methylthiosemicarbazide. PFA-DTS was synthesized by the Friedel-Crafts acylation of ethyl 11-phenylundecanate, selenium oxidation of the acetophenone derivative, followed by the condensation with N-methylthiosemicarbazide. Radiolabeling of FA-DTS and PFA-DTS with [64Cu]copper acetate was simple, rapid and quantitative. When injected into mice, both compounds were distributed and retained in the myocardium. These results offer a good basis for further development of 62Cu labeled fatty acid analogs.

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