2 research outputs found
Supported Synthesis of Halogenated Organic Compounds
Halogenated organic compounds are highly sought after in a wide variety of fields, for example synthetic and medicinal chemistry as well as materials science. The supported synthesis of organohalogens has been extensively developed in the field of imaging where rapid purification of radiotracers containing isotopes with short half-lives is of great importance. Electrophilic and nucleophilic halogenation occurs upon cleavage from the support and the desired labeled product is readily separated from contaminants. This review provides a discussion as to how supported synthetic routes have facilitated the preparation of halogenated compounds. 1 Introduction 2 Halogenation of Supported Precursors 2.1 Fluorination 2.2 Chlorination 2.3 Bromination 2.4 Iodination 3 Conclusion © Georg Thieme Verlag Stuttgart · New York
18F-labelling innovations and their potential for clinical application
An impressive variety of new methodologies for the preparation of 18F-labelled tracers and ligands has appeared over the last decade. Most strategies of the newly developed radiofluorination methods predominantly aim at products of high molar activity by ‘late-stage’ labelling of small (hetero)aromatic molecules and the use of transition metals. This is accompanied by the improvement of technical procedures, like preparation of reactive [18F]fluoride and automated syntheses. The newly introduced procedures reflect a high innovative level and creativity in radio(pharmaceutical) chemistry at present, which are based on modern chemical methods and deep mechanistic insights. Taking also automation and quality control into consideration, major recently developed radiofluorination methods, most of those still under development, are compiled here in view of their potential for clinical PET imaging and thus the ability to advance molecular imaging