Manganese(III)-mediated direct phosphonylation of arenes
作者:Wei Xu、Jian-Ping Zou、Wei Zhang
DOI:10.1016/j.tetlet.2010.03.029
日期:2010.5
Manganese (III)-promoted direct phosphonylation of mono- and disubstituted arenes with dialkylphosphite afforded regioselective dialkylphosphonates in good yields. The reactions can apply to arenesbearing electron-donating groups and electron-withdrawinggroups such as ester and nitrile.
Direct C−H Phosphonylation of Electron-Rich Arenes and Heteroarenes by Visible-Light Photoredox Catalysis
作者:Rizwan S. Shaikh、Indrajit Ghosh、Burkhard König
DOI:10.1002/chem.201701283
日期:2017.9.7
the atom economy and allows preparing and modifying complex molecules more easily. . In contrast to the wide applications of aryl phosphonates, their synthesis via direct C-H bond phosphonylation is a less explored area. We report here a general, mild, and broadly applicable visible light photoredox C-H bond phosphonylation method for electron rich arenes and heteroarenes. The photoredox catalytic protocol
Arylphosphonate-Directed Ortho C–H Borylation: Rapid Entry into Highly-Substituted Phosphoarenes
作者:Feiyang Xu、Olivia M. Duke、Daniel Rojas、Hanka M. Eichelberger、Raphael S. Kim、Timothy B. Clark、Donald A. Watson
DOI:10.1021/jacs.0c04159
日期:2020.7.15
Phosphonate-directed ortho C-H borylation of aromatic phosphonates is reported. Using simple starting materials and com-mercially accessible catalysts, this method provides steady access to ortho-phosphonate aryl boronic esters bearing pendant functionality and flexible substitution patterns. These products serve as flexible precursors for a variety of highly-substituted phosphoarenes, and in situ
Visible-Light-Induced External Oxidant-Free Oxidative Phosphonylation of C(sp<sup>2</sup>)–H Bonds
作者:Linbin Niu、Jiamei Liu、Hong Yi、Shengchun Wang、Xing-An Liang、Atul K. Singh、Chien-Wei Chiang、Aiwen Lei
DOI:10.1021/acscatal.7b02418
日期:2017.11.3
catalytic methods for the phosphonylation of C(sp2)–H bonds is important. Herein, we achieve a visible-light-induced external oxidant-free oxidative phosphonylation of C(sp2)–H bonds via the combination of photocatalysis and proton-reduction catalysis. Mechanistic studies indicate that the visible-light-induced electron-rich arene radicalcation is the key reactive intermediate. The synthetic application