<i>cis</i>-Specific Hydrofluorination of Alkenylarenes under Palladium Catalysis through an Ionic Pathway
作者:Enrico Emer、Lukas Pfeifer、John M. Brown、Véronique Gouverneur
DOI:10.1002/anie.201310056
日期:2014.4.14
paper describes the hydrofluorination of alkenes through sequential H− and F+ addition underpalladiumcatalysis. The reaction is cis specific, thus providing access to benzylic fluorides. The mechanism of this reaction involves an ionicpathway and is distinct from known hydrofluorinations involving radical intermediates. The first catalytic enantioselective hydrofluorination is also disclosed.
[EN] A NEW METHOD OF 18F LABELLING AND INTERMEDIATE SALTS<br/>[FR] NOUVEAU PROCÉDÉ D'ÉTIQUETAGE DE 18F ET DE SELS INTERMÉDIAIRES
申请人:NAT UNIV SINGAPORE
公开号:WO2021126080A1
公开(公告)日:2021-06-24
Disclosed herein is a salt of formula I: where R1, X, n, R, R1, Y, m, p, q, Z and o are as defined herein. Also disclosed herein are methods of using said salts in chemical synthesis, such as to prepare compounds isotopically enriched in 18F for use in PET imaging, as well as methods to make the compounds of formula I.
FLP-Catalyzed Monoselective C–F Functionalization in Polyfluorocarbons at Geminal or Distal Sites
作者:Richa Gupta、Dipendu Mandal、Amit K. Jaiswal、Rowan D. Young
DOI:10.1021/acs.orglett.1c00346
日期:2021.3.5
positions. This methodology can be applied to aromatic-, ether-, thioether-, and alkyl-supported fluoromethylgroups. We expand the range of FLP base partners that work with monoselective C–F activation to include sulfide. The activated products can be subsequently functionalized via SN2 substitutions, photoredox-alkylations, and Suzuki couplings.
我们报道了受挫的路易斯对(FLP)催化的一系列脂族多氟化碳具有同等的双链和双链CF位置的单选择性CF活化。该方法可以应用于芳族,醚,硫醚和烷基支持的氟甲基。我们扩大了与单选择性C–F激活一起使用的FLP基础合作伙伴的范围,以包括硫化物。随后可以通过S N 2取代,光氧化还原烷基化和Suzuki偶联将活化的产物官能化。
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.