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
普遍存在的酮羰基基团通常会使底物向自由基基氟化反应失活,尤其是最靠近基团的位置。在本文中,使用酮代替酮,以使用Selectfluor,催化苯甲醚和可见光引导脂肪族氟化。在刚性单,二,三和四环(甾体)底物上使用环状和环外脂族酮作为导向基团,证明了选择性的β-和γ氟化作用。