A mild electroassisted synthesis of (hetero)arylphosphonates
作者:Stéphane Sengmany、Anthony Ollivier、Erwan Le Gall、Eric Léonel
DOI:10.1039/c8ob00500a
日期:——
electrochemically-assisted synthesis of (hetero)arylphosphonates from (hetero)arylhalides and dimethyl phosphite is described. Very mild and simple conditions are employed as the cross-coupling is carried out in galvanostatic mode, in an undivided cell at room temperature, using NiBr2bpy as the easily available pre-catalyst and acetonitrile as the solvent. In addition, both aryl bromides and iodides can be used
Palladium-Catalyzed Reaction of Aryl Polyfluoroalkanesulfonates with<i>O,O</i>-Dialkyl Phosphonates
作者:Xiyan Lu、Jingyang Zhu
DOI:10.1055/s-1987-28063
日期:——
Arylphosphonates were synthesized by the reaction of aryl polyfluoroalkanesulfonates with O,O-dialkyl phosphonates in the presence of triethylamine under palladium catalysis in good to excellent yield.
A palladium-catalyzed oxidative cross-coupling reaction between aryl pinacol boronates and H-phosphonates in ethanol
作者:Te-Hsuan Chen、Daggula Mallikarjuna Reddy、Chin-Fa Lee
DOI:10.1039/c7ra04619g
日期:——
The first successful oxidative coupling reaction of aryl pinacol boronic esters with H-phosphonates to deliver aryl phosphorous compounds is reported herein. These reactions between aryl boronic reagents and H-phosphonates were carried out synergistically using a Pd catalyst, additive and oxidant. Without using bases and ligands, phosphorylation was accomplished in an environmentally-friendly manner
NiCl2-catalyzed P–C coupling reaction of arylhalides and various > P(O)H-compounds under MW conditions without directly added P-ligands. The reactivity of a few aryl derivatives in the Pd(OAc)2-catalyzed Hirao reaction was also studied. An induction period was observed in the reaction of bromobenzene and diphenylphosphine oxide. Finally, the less known copper(I)-promoted P–C coupling reactions were investigated
A visible‐light‐inducedmetal‐free catalytic system was developed for the synthesis of arylphosphonates starting from arylhydrazines and trialkylphosphites. By using the inexpensive eosin B as catalyst, sub‐stoichiometric amounts of DABCO, and ambient air as oxidant, diverse arylphosphonates were obtained under visible‐light irradiation. Notably, this catalytic system is suitable for gram‐scale reaction