Ketones as directing groups in photocatalytic sp<sup>3</sup> C–H fluorination
作者:Desta Doro Bume、Cody Ross Pitts、Fereshte Ghorbani、Stefan Andrew Harry、Joseph N. Capilato、Maxime A. Siegler、Thomas Lectka
DOI:10.1039/c7sc02703f
日期:——
The ubiquitous ketone carbonyl group generally deactivates substrates toward radical-based fluorinations, especially sites closest to it. Herein, ketones are used instead to direct aliphatic fluorination using Selectfluor, catalytic benzil, and visible light. Selective β- and γ-fluorination are demonstrated on rigid mono-, di-, tri-, and tetracyclic (steroidal) substrates employing both cyclic and