Monofluoroalkenylation of Dimethylamino Compounds through Radical–Radical Cross‐Coupling
作者:Jin Xie、Jintao Yu、Matthias Rudolph、Frank Rominger、A. Stephen K. Hashmi
DOI:10.1002/anie.201602347
日期:2016.8
An unprecedented and challenging radical–radicalcross‐coupling of α‐aminoalkyl radicals with monofluoroalkenyl radicals derived from gem‐difluoroalkenes was achieved. This first example of tandem C(sp3)−H and C(sp2)−F bond functionalization through visible‐light photoredox catalysis offers a facile and flexible access to privileged tetrasubstituted monofluoroalkenes under very mild reaction conditions
A novel photoredox-active group for the generation of fluorinated radicals from difluorostyrenes
作者:Mikhail O. Zubkov、Mikhail D. Kosobokov、Vitalij V. Levin、Vladimir A. Kokorekin、Alexander A. Korlyukov、Jinbo Hu、Alexander D. Dilman
DOI:10.1039/c9sc04643g
日期:——
by the thiolene click reaction. It proceeds upon visible light catalysis with 9-phenylacridine providing various difluorinated sulfides as radical precursors. Single electron reduction of the C–S bond with the formation of fluoroalkyl radicals is enabled by the electron-poor azine ring. The intermediate difluorinated sulfides were involved in a series of photoredox reactions with silyl enol ethers
α‐difluoro(thio)methylated carbanions with molecular oxygen under mild conditions are reported. This strategy tames the redox reactions of the in situ generated hydroperoxy difluoromethylsulfides, in which solvent‐bonding can alter their reactivity and switch the oxidation selectivities. These controllable three‐component reactions of gem‐difluoroalkenes, thiols and molecular oxygen afford various useful α‐d
A concise synthesis of functionalised gem-difluoroalkenes, via the addition of organolithium reagents to α-trifluoromethylstyrene
作者:Jean-Pierre Bégué、Danièle Bonnet-Delpon、Michael H. Rock
DOI:10.1016/0040-4039(95)00933-4
日期:1995.7
The treatment of α-trifluoromethyl styrene with organolithiumreagents results in the selective formation of gem-difluoroalkenes in good to excellent yield. This reaction has been applied to the synthesis of a range functionalised gem-difluoroalkenes.
Visible-Light-Induced Monofluoroalkenylation and <i>gem</i>-Difluoroallylation of Inactivated C(sp<sup>3</sup>)–H Bonds via 1,5-Hydrogen Atom Transfer (HAT)