Nickel-catalyzed monofluoromethylation of (hetero)aryl bromides <i>via</i> reductive cross-coupling
作者:Han Yin、Jie Sheng、Kai-Fan Zhang、Zi-Qi Zhang、Kang-Jie Bian、Xi-Sheng Wang
DOI:10.1039/c9cc03737c
日期:——
A mild and efficient nickel-catalyzed direct monofluoromethylation of (hetero)aryl bromides by reductive cross-coupling has been developed. This method exhibits good efficiency, wide functional-group compatibility, and suitability for aryl and heteroaryl bromides with abundant industrial raw material BrCH2F. This strategy provides an efficient way to synthesize monofluoromethylated molecules for drug
Metal-free <sup>18</sup>F-labeling of aryl-CF<sub>2</sub>H via nucleophilic radiofluorination and oxidative C–H activation
作者:Gengyang Yuan、Feng Wang、Nickeisha A. Stephenson、Lu Wang、Benjamin H. Rotstein、Neil Vasdev、Pingping Tang、Steven H. Liang
DOI:10.1039/c6cc07913j
日期:——
A metal-free and selective method to form [18F]aryl-CF2H through nucleophilic radiofluorination of benzyl (pseudo)halides and oxidative C-H activation of benzylic C-H bonds has been developed.
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