Photoinduced Proton‐Transfer Reactions for Mild O‐H Functionalization of Unreactive Alcohols
作者:Sripati Jana、Zhen Yang、Fang Li、Claire Empel、Junming Ho、Rene M. Koenigs
DOI:10.1002/anie.201915161
日期:2020.3.27
hexafluoroisopropanol and the diazoalkane acts as an unreactive hydrogen‐bonding complex. Only after photoexcitation does this complex undergo a protonation‐substitution reaction to the reaction product. Investigations on the applicability of this photochemical transformation show that a broad variety of acidic alcohols can be subjected to this transformation and thus demonstrate the feasibility of
Nucleophilic (Radio)Fluorination of α-Diazocarbonyl Compounds Enabled by Copper-Catalyzed H–F Insertion
作者:Erin E. Gray、Matthew K. Nielsen、Kimberly A. Choquette、Julia A. Kalow、Thomas J. A. Graham、Abigail G. Doyle
DOI:10.1021/jacs.6b06770
日期:2016.8.31
The copper-catalyzed H-F insertion into α-diazocarbonyl compounds is described using potassium fluoride (KF) and hexafluoroisopropanol. Access to complex α-fluorocarbonyl derivatives is achieved under mild conditions, and the method is readily adapted to radiofluorination with [(18)F]KF. This late-stage strategy provides an attractive route to (18)F-labeled biomolecules.