Catalyst-Free Aromatic Radiofluorination via Oxidized Iodoarene Precursors
作者:Young-Do Kwon、Jeongmin Son、Joong-Hyun Chun
DOI:10.1021/acs.orglett.8b03450
日期:2018.12.21
Oxidizediodoarenes (OIAs), prepared via mCPBA-mediated oxidation, have been demonstrated as versatile precursors for the synthesis of [18F]fluoroarenes in the absence of catalysts. OIAs have been identified as intermediates in single-pot syntheses of iodonium salts and ylides but have never been recognized as radiofluorinationprecursors. Here, the isolated OIAs were used without any catalysts to
Iodonium ylides for one-step, no-carrier-added radiofluorination of electron rich arenes, exemplified with 4-(([<sup>18</sup>F]fluorophenoxy)-phenylmethyl)piperidine NET and SERT ligands
作者:Jens Cardinale、Johannes Ermert、Sven Humpert、Heinz H. Coenen
DOI:10.1039/c4ra00674g
日期:——
Iodonium ylide precursors of electron rich arenes, i.e. the NET and SERT ligands 4-((3- and 4-fluorophenoxy)phenylmethyl)piperidine, served as model compounds for the direct substitution with n.c.a. [18F]fluoride.
Ring-Closing Synthesis of Dibenzothiophene Sulfonium Salts and Their Use as Leaving Groups for Aromatic <sup>18</sup>F-Fluorination
作者:Thibault Gendron、Kerstin Sander、Klaudia Cybulska、Laure Benhamou、Pak Kwan Brian Sin、Aqsa Khan、Michael Wood、Michael J. Porter、Erik Årstad
DOI:10.1021/jacs.8b06730
日期:2018.9.5
Herein, we report a novel intramolecular ring-closing reaction of biaryl thioethers that give access to highly functionalized dibenzothiophene sulfonium salts under mild conditions. The resulting precursors react regioselectively with [18F]fluoride to give [18F]fluoroarenes in predictable radiochemical yields. The strategy expands the available radiochemical space and provides superior labeling efficiency
在此,我们报道了联芳基硫醚的一种新型分子内闭环反应,该反应可以在温和条件下获得高度官能化的二苯并噻吩锍盐。所得前体与[ 18 F]氟化物发生区域选择性反应,以可预测的放射化学产率生成[ 18 F]氟芳烃。该策略扩大了可用的放射化学空间,并为临床相关 PET 示踪剂提供了卓越的标记效率。
Rapid and Efficient Radiosyntheses of meta-Substituted [18F]Fluoroarenes from [18F]Fluoride Ion and Diaryliodonium Tosylates within a Microreactor
作者:Joong-Hyun Chun、Shuiyu Lu、Victor W. Pike
DOI:10.1002/ejoc.201100382
日期:2011.8
at high specific radioactivity into fluoroarenes are valuable for the development of radiotracers for molecular imaging with positron emission tomography. Here we have explored the scope of the radiofluorination of diaryliodonium salts with no-carrier-added [(18)F]fluorideion for the preparation of otherwise difficult to access meta-substituted [(18)F]fluoroarenes. A microfluidic reaction platform was
Nucleophilic <sup>18</sup>F-Fluorination of Heteroaromatic Iodonium Salts with No-Carrier-Added [<sup>18</sup>F]Fluoride
作者:Tobias L. Ross、Johannes Ermert、Carsten Hocke、Heinz H. Coenen
DOI:10.1021/ja066850h
日期:2007.6.1
the nucleophilic, regioselective no-carrier-added (nca) radiofluorination of various arenes. It even allowed the nucleophilic introduction of nca [18F]fluoride into electron-rich arene compounds in one step. The influences of the substitution pattern, of counteranions, and of different reaction conditions were studied. Effects of counterions could be explained by the influence of solvent on ion pair