Substrates with leaving groups that contained perfluoro moieties were investigated in labelling chemistry in order to exploit their properties to improve reactivity and purification. [18F](Fluoromethyl)benzene was used as the model target compound. Precursors containing perfluoroalkyl and perfluoroaryl sulfonate moieties were subjected to nucleophilic 18F-fluorination, and the impact of perfluoro groups on the substitution reaction and product purification was investigated. [18F]Fluoride interacted with perfluoroalkyl chains, precluding nucleophilic substitution. When perfluoroaryl groups were used, the substitution proceeded, and the separation of product was explored. The radiolabelled product was obtained in 32% analytical yield and the radiochemical purity was increased to approximately 77% using fluorous solid phase extraction purification. Copyright © 2009 John Wiley & Sons, Ltd.
含有
全氟基团的离去基底在标记
化学中进行了研究,以利用其特性提高反应性和纯化。以[18F](
氟甲基)苯作为模型目标化合物。含有
全氟烷基和
全氟芳基
磺酸基团的前体经过亲核性18F-
氟化,研究了
全氟基团对取代反应和产物纯化的影响。[18F]
氟化物与
全氟烷基链发生相互作用,妨碍了亲核取代反应。当使用
全氟芳基基团时,取代反应得以进行,并探讨了产物的分离。最终获得了32%的分析产率,并通过
氟固相萃取纯化将放射
化学纯度提高至约77%。版权所有 © 2009 John Wiley & Sons, Ltd.