Copper sees the light of day: [Cu(dap)2Cl] proved to be an excellent photoredoxcatalyst for atom‐transfer radical addition reactions, as well as for allylation reactions (see scheme), providing an attractive alternative to commonly used iridium‐ and ruthenium‐based catalysts.
Radical Perfluoroalkylation Enabled by a Catalytically Generated Halogen Bonding Complex and Visible Light Irradiation
作者:Tarannum Tasnim、Calvin Ryan、Miranda L. Christensen、Christopher J. Fennell、Spencer P. Pitre
DOI:10.1021/acs.orglett.1c04139
日期:2022.1.14
chemistry. This report describes the use of a substituted hydroquinone catalyst to promote radical perfluoroalkylation reactions. Mechanistic studies indicate that the reaction is initiated through formation of a visible light-absorbing halogen bonding complex between the hydroquinone catalyst and the perfluoroalkyl halide radical precursor.
Visible light promoted fluoroalkylation of alkenes and alkynes using 2-bromophenol as a catalyst
作者:Erlin Zhu、Xiao-Xiao Liu、An-Jun Wang、Ting Mao、Liang Zhao、Xingang Zhang、Chun-Yang He
DOI:10.1039/c9cc06587c
日期:——
A simple, mild and efficient approach for the fluoroalkylation of alkenes and alkynes using 2-bromophenol as a catalyst is presented.
使用2-溴苯酚作为催化剂,提出了一种简单、温和和高效的方法,用于烯烃和炔烃的氟烷基化。
Light-mediated iodoperfluoroalkylation of alkenes/alkynes catalyzed by chloride ions: role of halogen bonding
作者:Redouane Beniazza、Lionel Remisse、Damien Jardel、Dominique Lastécouères、Jean-Marc Vincent
DOI:10.1039/c8cc02765j
日期:——
deoxygenated methanol solutions containing catalytic amounts of NaCl or Bu4NCl. Preliminary mechanistic studies indicate that the light-promoted homolytic cleavage of the Rf–I bond that initiates the reaction is facilitated by the halogenbonding interaction between RfI and chloride ions.
描述了用于烯烃/炔烃的碘全氟烷基化的创新方法。这些反应,包括烯烃的碘三氟甲基化,在低强度的UVA辐射下,在含有催化量的NaCl或Bu 4 NCl的脱氧甲醇溶液中,非常有效地进行。初步的机理研究表明,R f I和氯离子之间的卤素键相互作用促进了引发反应的R f -I键的光促进均裂。