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.
Electrochemical Generation of Aryl Radicals from Organoboron Reagents Enabled by Pulsed Electrosynthesis
作者:Maxime Boudjelel、Jessica Zhong、Lorenzo Ballerini、Ian Vanswearingen、Rossul Al‐Dhufari、Christian A. Malapit
DOI:10.1002/anie.202406203
日期:2024.7.29
Pulsed electrosynthesis efficiently converts aromatic organoboron reagents to aryl radicals. Mechanistic studies reveal that pulsed electrosynthesis overcomes challenges like radical grafting/passivation, homocoupling, overoxidation, and decomposition. This electro-oxidative method enables straightforward functionalization of aromatic organoboron reagents to form aryl C−P, C−Se, C−Te, and C−S bonds
(<i>R</i>)-3,5-diCF<sub>3</sub>-SYNPHOS and (<i>R</i>)-<i>p</i>-CF<sub>3</sub>-SYNPHOS, Electron-Poor Diphosphines for Efficient Room Temperature Rh-Catalyzed Asymmetric Conjugate Addition of Arylboronic Acids
Two new atropisomeric electron-poor chiral diphosphine ligand analogues of SYNPHOS were prepared, and their electronic properties are described. These two ligands afforded high performance for the Rh-catalyzed asymmetric 1,4-addition of arylboronic acids to alpha,beta-unsaturated carbonyl compounds at room temperature.