Room-Temperature C–H Arylation: Merger of Pd-Catalyzed C–H Functionalization and Visible-Light Photocatalysis
作者:Dipannita Kalyani、Kate B. McMurtrey、Sharon R. Neufeldt、Melanie S. Sanford
DOI:10.1021/ja208068w
日期:2011.11.23
This communication describes the development of a room-temperature ligand-directed C-H arylation reaction using aryldiazoniumsalts. This was achieved by the successful merger of palladium-catalyzed C-H functionalization and visible-lightphotoredoxcatalysis. The new method is general for a variety of directing groups and tolerates many common functional groups.
Palladium-Catalyzed Monoselective Halogenation of CH Bonds: Efficient Access to Halogenated Arylpyrimidines using Calcium Halides
作者:Bingrui Song、Xiaojian Zheng、Jun Mo、Bin Xu
DOI:10.1002/adsc.200900778
日期:2010.2.15
A wide variety of ortho-halogenated arylpyrimidines were prepared with high monoselectivity and functional-group tolerance by usingcalciumhalides as crucial halogenating agents and cupric trifluoroacetate as oxidant in the presence of air.
Copper Acetate–DMSO Promoted Methylthiolation of Arenes and Heteroarenes
作者:Poonam Sharma、Sandeep Rohilla、Nidhi Jain
DOI:10.1021/acs.joc.5b00443
日期:2015.4.17
An unprecedented copper acetate–DMSO promoted methylthiolation of arenes and heteroarenes in the presence of air has been developed. The reaction is highly regioselective under the directing group influence of pyridine and pyrimidine functional units and gives the thiomethylated product in moderate to high yields.
Palladium-Catalyzed Regioselective C-H Bond ortho-Acetoxylation of Arylpyrimidines
作者:Xiaojian Zheng、Bingrui Song、Bin Xu
DOI:10.1002/ejoc.201000631
日期:——
An efficient and regioselectivepalladium-catalyzed ortho C-H acetoxylation reaction was developed to afford ortho monoacetoxylated arylpyrimidines in good to excellent yields by using cupric trifluoroacetate as a cocatalyst. A wide variety of oxygenated arylpyrimidines were prepared with high regioselectivity and functional group tolerance.
Cp*Rh(<scp>iii</scp>) and Cp*Ir(<scp>iii</scp>)-catalysed redox-neutral C–H arylation with quinone diazides: quick and facile synthesis of arylated phenols
作者:Shang-Shi Zhang、Chun-Yong Jiang、Jia-Qiang Wu、Xu-Ge Liu、Qingjiang Li、Zhi-Shu Huang、Ding Li、Honggen Wang
DOI:10.1039/c5cc03187g
日期:——
Cp*Rh(iii)- and Cp*Ir(iii)-catalysed direct C–H arylation with quinone diazides provides a facile and redox-neutral access to arylated phenols.