18F-Fluoroheteroarenes find wide application as radiotracers for PET (positronemissiontomography) imaging. Here, we present a deaminative radiosynthetic approach via pyridinium tetrafluoroborates that facilitates radiofluorination of 33 structurally diverse heteroarenes in up to 98 % RCY (radiochemical yield). This method was also amenable to automation and was successfully translated to an automated
Nucleophilic Fluorination of Heteroaryl Chlorides and Aryl Triflates Enabled by Cooperative Catalysis
作者:Cynthia M. Hong、Aaron M. Whittaker、Danielle M. Schultz
DOI:10.1021/acs.joc.0c02845
日期:2021.3.5
and scalable methods for fluorination. The most straightforward route to synthesize aryl fluorides is through the halide exchange “halex” reaction, but conditions, cost, and atom economy preclude most available methods from large-scale manufacturing processes. We report a new approach that leverages the cooperative action of 18-crown-6 ether and tetramethylammonium chloride to catalytically access the