Late Stage Benzylic C–H Fluorination with [<sup>18</sup>F]Fluoride for PET Imaging
作者:Xiongyi Huang、Wei Liu、Hong Ren、Ramesh Neelamegam、Jacob M. Hooker、John T. Groves
DOI:10.1021/ja5039819
日期:2014.5.14
aliphatic C-H bonds with no-carrier-added [(18)F]fluoride. The method uses Mn(salen)OTs as an F-transfer catalyst and enables the facile labeling of a variety of bioactive molecules and building blocks with radiochemical yields (RCY) ranging from 20% to 72% within 10 min without the need for preactivation of the labeling precursor. Notably, the catalyst itself can directly elute [(18)F]fluoride from an
Radical C–H Fluorination Using Unprotected Amino Acids as Radical Precursors
作者:Alyssa M. Hua、Duy N. Mai、Ramon Martinez、Ryan D. Baxter
DOI:10.1021/acs.orglett.7b01188
日期:2017.6.2
report a unique example of utilizing unprotected amino acids for benzylicC–Hfluorination via a radical process. α-Aminoalkyl radicals are readily generated via oxidative decarboxylation of unprotected amino acids using a simple silver(I) catalyst and Selectfluor, which serves as both a mild oxidant and source of electrophilic fluorine. Mechanistic investigation shows that coordination of the unprotected
Manganese-Catalyzed Oxidative Benzylic C-H Fluorination by Fluoride Ions
作者:Wei Liu、John T. Groves
DOI:10.1002/anie.201301097
日期:2013.6.3
An efficient protocol for the selective fluorination of benzylic CH bonds is described. The process is catalyzed by manganese salen complexes and uses nucleophilic fluorine sources, such as triethylamine trihydrofluoride and KF. Reaction rates are sufficiently high (30 min) to allow adoption for the incorporation of 18F fluoride sources for PET imaging applications.
[EN] METHODS AND COMPOSITIONS FOR DIRECT RADIOACTIVE LABELING OF BIO-ACTIVE MOLECULES AND BUILDING BLOCKS<br/>[FR] PROCÉDÉS ET COMPOSITIONS DESTINÉS AU MARQUAGE RADIOACTIF DIRECT DE MOLÉCULES ET DE BLOCS DE CONSTRUCTION BIOLOGIQUEMENT ACTIFS
申请人:UNIV PRINCETON
公开号:WO2015134467A1
公开(公告)日:2015-09-11
Methods of direct radioactive labeling a carbon containing compound having an sp3 C-H bond are provided. Methods of carrier-free 18F fluorination of a carbon containing compound mediated by manganese salen complexes or manganese porphyrin complexes comprising weakly coordinated anions as axial ligands are provided. Methods of "dry-down" free radioactive labeling of a carbon containing compound having an sp3 C-H bond are provided. The radioactively labeled products of the methods are provided.
Continuous Heterogeneous Photocatalysis in Serial Micro-Batch Reactors
作者:Bartholomäus Pieber、Menny Shalom、Markus Antonietti、Peter H. Seeberger、Kerry Gilmore
DOI:10.1002/anie.201712568
日期:2018.7.26
leaching catalysts, and heterogeneous photocatalysts are commonly employed in batch processes but are ill‐suited for continuous‐flow chemistry. Heterogeneous catalysts for thermal reactions are typically used in packed‐bed reactors, which cannot be penetrated by light and thus are not suitable for photocatalytic reactions involving solids. We demonstrate that serial micro‐batch reactors (SMBRs) allow