Dual Photoredox and Gold Catalysis: Intermolecular Multicomponent Oxyarylation of Alkenes
作者:Matthew N. Hopkinson、Basudev Sahoo、Frank Glorius
DOI:10.1002/adsc.201400580
日期:2014.9.15
developed using a dual gold and photoredoxcatalytic system. Inexpensive organic dyes could be employed as the photocatalyst using aryldiazonium salts, while the combination of gold and iridium catalysts allowed for diaryliodonium compounds to be employed as the source of the arene coupling partner. In both cases, α‐arylated ether products were generated under remarkably mild conditions using readily accessible
N-sulfonylpyrrolidines and N-alkyl sulfonamides were efficiently prepared via alkylation of sulfonamides with 1,4-diols or alcohols by Tf2O. The reaction occurred under mild reaction conditions in moderate to high yields and tolerated aryl and aliphatic sulfonamides.
N-Heterocyclic carbene–gold(I)-catalyzed carboheterofunctionalization of alkenes with arylboronic acids
作者:Shifa Zhu、Lijuan Ye、Wanqing Wu、Huanfeng Jiang
DOI:10.1016/j.tet.2013.09.097
日期:2013.12
A new approach to the synthesis of pyrrolidine, tetrahydrofuran, and imidazolidin-2-one via N-heterocyclic carbene–gold(I)-catalyzed intramolecular amino- or oxyarylation reactions from a wide variety of alkene substrates such as N-allyl amides, alcohols, carboxylic acids, and ureas in the presence of Selectfluor under mild conditions has been developed.
Palladium-Catalyzed Alkene Carboamination Reactions of Electron-Poor Nitrogen Nucleophiles
作者:Luke J. Peterson、John P. Wolfe
DOI:10.1002/adsc.201500334
日期:2015.7.6
Modified reaction conditions that facilitate Pd‐catalyzed alkene carboamination reactions of electron‐deficient nitrogennucleophiles are reported. Pent‐4‐enylamine derivatives bearing N‐tosyl or N‐trifluoroacetyl groups are coupled with aryl triflates to afford substituted pyrrolidines in good yield. These reactions proceed via a mechanism involving anti‐aminopalladation of the alkene, which differs
Gold-Catalyzed Intramolecular Aminoarylation of Alkenes: CC Bond Formation through Bimolecular Reductive Elimination
作者:William E. Brenzovich、Diego Benitez、Aaron D. Lackner、Hunter P. Shunatona、Ekaterina Tkatchouk、William A. Goddard、F. Dean Toste
DOI:10.1002/anie.201002739
日期:——
Gold‐ilocks and the 3 mol % catalyst: Bimetallic gold bromides allow the room temperature aminoarylation of unactivated terminal olefins with aryl boronic acids using Selectfluor as an oxidant. A catalytic cycle involving gold(I)/gold(III) and a bimolecular reductive elimination for the key CC bond‐forming step is proposed. dppm= bis(diphenylphosphanyl)methane.