Recent Advances in <sup>18</sup>F Radiochemistry: A Focus on B-<sup>18</sup>F, Si-<sup>18</sup>F, Al-<sup>18</sup>F, and C-<sup>18</sup>F Radiofluorination via Spirocyclic Iodonium Ylides.

Bernard-Gauthier, Vadim; Lepage, Mathieu L; Waengler, Bjoern; Bailey, Justin J; Liang, Steven H; Perrin, David M; Vasdev, Neil; Schirrmacher, Ralf · J Nucl Med · 2018

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Abstract

Straightforward radiosynthesis protocols for <sup>18</sup>F-labeled radiopharmaceuticals are an indispensable but often overlooked prerequisite to successfully perform molecular imaging studies in vivo by PET. In recent years, thanks to the expansion of the <sup>18</sup>F chemical toolbox, structurally diverse and novel clinically relevant radiopharmaceuticals have been synthesized with both high efficiency and ready implementation. This article provides an overview of recent <sup>18</sup>F-labeling methodologies, specifically for B-<sup>18</sup>F, Si-<sup>18</sup>F, Al-<sup>18</sup>F, and iodine (III)-mediated radiofluorination via the spirocyclic iodonium ylide technology.

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