Silver-Catalyzed Radical Aminofluorination of Unactivated Alkenes in Aqueous Media
作者:Zhaodong Li、Liyan Song、Chaozhong Li
DOI:10.1021/ja400124t
日期:2013.3.27
We report herein a mild and catalytic intramolecularaminofluorination of unactivated alkenes. Thus, with the catalysis of AgNO3, the reactions of various N-arylpent-4-enamides with Selectfluor reagent in CH2Cl2/H2O led to the efficient synthesis of 5-fluoromethyl-substituted γ-lactams. A mechanism involving silver-catalyzed oxidative generation of amidyl radicals and silver-assisted fluorine atom
Hydrosulfonylation of Unactivated Alkenes by Visible Light Photoredox Catalysis
作者:Juan-Juan Wang、Wei Yu
DOI:10.1021/acs.orglett.9b03636
日期:2019.11.15
hydrosulfonylation of unactivated alkenes with sodium sulfinates was realized via [Ir(dF(CF3)ppy)2(dtbbpy)]PF6-mediated visiblelightphotoredoxcatalysis. The presence of an acid such as acetic acid is essential for the reaction to take place. A variety of unactivated alkenes can be transformed into sulfones with good yield and high regioselectivity using this reaction, which is proposed to proceed by a radical
Brønsted Base Assisted Photoredox Catalysis: Proton Coupled Electron Transfer for Remote C−C Bond Formation via Amidyl Radicals
作者:Jiaqi Jia、Yee Ann Ho、Raoul F. Bülow、Magnus Rueping
DOI:10.1002/chem.201802907
日期:2018.9.20
The synthesis of alkyne‐ and alkene‐decorated lactams has been achieved through a photoredox‐initiated radical cascade reaction. The developed Brønsted base assisted, photoredox‐catalyzed, intramolecular 5‐exo‐trig cyclization/intermolecular radical addition/elimination reaction provides facile access to functionalized γ‐lactams, with good functional group tolerance and high yields.