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Rapid Aqueous Late-Stage Radiolabelling of [GaF3 (BnMe2 -tacn)] by 18 F/19 F Isotopic Exchange: Towards New PET Imaging Probes.


ABSTRACT: A simple and rapid method for 18 F radiolabelling of [GaF3 (BnMe2 -tacn)] by 18 F/19 F isotopic exchange is described. The use of MeCN/H2 O or EtOH/H2 O (75:25) and aqueous [18 F]F- (up to 200?MBq) with heating (80?°C, 10?min) gave 66±4?% 18 F incorporation at a concentration of 268?nm, and 37±5?% 18 F incorporation at even lower concentration (27?nm), without the need for a Lewis acid promoter. A solid-phase extraction method was established to give [Ga18 F19 F2 (BnMe2 -tacn)] in 99?% radiochemical purity in an EtOH/H2 O mixture.

SUBMITTER: Monzittu FM 

PROVIDER: S-EPMC6055623 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature

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Rapid Aqueous Late-Stage Radiolabelling of [GaF<sub>3</sub> (BnMe<sub>2</sub> -tacn)] by <sup>18</sup> F/<sup>19</sup> F Isotopic Exchange: Towards New PET Imaging Probes.

Monzittu Francesco M FM   Khan Imtiaz I   Levason William W   Luthra Sajinder K SK   McRobbie Graeme G   Reid Gillian G  

Angewandte Chemie (International ed. in English) 20180426 22


A simple and rapid method for <sup>18</sup> F radiolabelling of [GaF<sub>3</sub> (BnMe<sub>2</sub> -tacn)] by <sup>18</sup> F/<sup>19</sup> F isotopic exchange is described. The use of MeCN/H<sub>2</sub> O or EtOH/H<sub>2</sub> O (75:25) and aqueous [<sup>18</sup> F]F<sup>-</sup> (up to 200 MBq) with heating (80 °C, 10 min) gave 66±4 % <sup>18</sup> F incorporation at a concentration of 268 nm, and 37±5 % <sup>18</sup> F incorporation at even lower concentration (27 nm), without the need for a L  ...[more]

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