A palladium-catalyzed intermolecular polarity-mismatched addition of unactivated alkyl radicals to unactivated alkenes was developed for the first time. In the two-component dicarbofunctionalization, a variety of primary, secondary, and tertiary unactivated alkyl halides regioselectively reacted with various unactivated olefins. A series of structurally complex heteropolycycles decorated with a quaternary
Copper-Catalyzed Regioselective Borylfluoromethylation of Alkenes
作者:Nuo-Yi Wu、Xiu-Hua Xu、Feng-Ling Qing
DOI:10.1021/acscatal.9b01530
日期:2019.6.7
A copper-catalyzed borylfluoromethylation of alkenes with fluoromethyl iodide and diboron reagents was disclosed. This protocol afforded the previously unknown and synthetically useful borylfluoromethylated alkanes in good yields and excellent regioselectivity. Its synthetic application was illustrated through the derivatization of organoboron products and preparation of monofluorinated ibuprofen.
Metal- and photocatalyst-free synthesis of 3-selenylindoles and asymmetric diarylselenides promoted by visible light
作者:Ignacio D. Lemir、Willber D. Castro-Godoy、Adrián A. Heredia、Luciana C. Schmidt、Juan E. Argüello
DOI:10.1039/c9ra03642c
日期:——
the synthesis of 3-selenylindoles employing diorganyl diselenides and indoles or electron-rich arenes as starting materials. Visible blue light was used to promote the reaction without employing transitionmetal complexes or organic photocatalysts as sensitizers. Additives such as strong oxidants or bases were not required. Moreover, ethanol was employed as a benign solvent under mild reaction conditions
Copper-Catalyzed Enantioselective Markovnikov Protoboration of α-Olefins Enabled by a Buttressed N-Heterocyclic Carbene Ligand
作者:Yuan Cai、Xin-Tuo Yang、Shuo-Qing Zhang、Feng Li、Yu-Qing Li、Lin-Xin Ruan、Xin Hong、Shi-Liang Shi
DOI:10.1002/anie.201711229
日期:2018.1.26
Reported is a highly enantioselective copper‐catalyzed Markovnikov protoboration of unactivatedterminalalkenes. A variety of simple and abundant feedstock α‐olefins bearing a diverse array of functional groups and heterocyclic substituents can be used as substrates, and the reaction proceeds under mild reaction conditions at ambient temperature to provide expedient access to enantioenriched alkylboronic
Ligand‐Controlled Regiodivergent Copper‐Catalyzed Alkylboration of Alkenes
作者:Wei Su、Tian‐Jun Gong、Xi Lu、Meng‐Yu Xu、Chu‐Guo Yu、Zheng‐Yang Xu、Hai‐Zhu Yu、Bin Xiao、Yao Fu
DOI:10.1002/anie.201506713
日期:2015.10.26
novel copper‐catalyzed regiodivergent alkylboration of alkenes with bis(pinacolato)diboron and alkyl halides has been developed. The regioselectivity of the alkylboration was controlled by subtle differences in the ligand structure. The reaction thus enables the practical, regiodivergentsynthesis of two different alkyl boronic esters with complex structures from a single alkene.