一种新的和实用的微波(MW)辅助方法是为快速和有效的氧化加成的仲膦氧化物或开发的烷基苯基ħ -phosphinates和乙炔。在氧化剂、反应时间、温度和起始材料的摩尔比方面优化反应。所开发的协议能够在温和条件下短反应时间内合成新型苯并[ b ]磷氧化物衍生物。通过使用特殊试剂,如烷基苯基-H-次膦酸或苯基丙酸乙酯,反应性基团(次膦酸酯和羧酸酯)可以整合到苯并磷骨架中,可以进一步向各种合成方向官能化,从而微调目标分子的光学性质。通过 X 射线衍射研究了苯并 [ b ] 磷氧化物衍生物的晶体结构,它提供了关于化合物及其在晶体中的分子相互作用的结构信息。
Nickel-Catalyzed Electrosynthesis of Aryl and Vinyl Phosphinates
作者:Farah Daili、Abdelhakim Ouarti、Marine Pinaud、Ibtihal Kribii、Stéphane Sengmany、Erwan Le Gall、Eric Léonel
DOI:10.1002/ejoc.202000422
日期:2020.6.23
A mild nickel‐catalyzed electrochemical approach for phosphonylation of aryl and vinyl bromides is reported. The used of iron/nickel alloy sacrificial anode process in undivided cell and under constant current electrolysis allowed to achieve C(sp2)–P cross‐couplings from alkyl H ‐phenylphosphinates and aryl or vinyl bromides. This electrochemical method enabled to prepare more than 30 new (hetero)aryl
Manganese-Mediated Intermolecular Arylation of<i>H</i>-Phosphinates and Related Compounds
作者:Olivier Berger、Jean-Luc Montchamp
DOI:10.1002/chem.201404507
日期:2014.9.22
intermolecular radical functionalization of arenes with aryl and alkyl H‐phosphinate esters, as well as diphenylphosphine oxide and H‐phosphonate diesters, is described. The novel catalytic MnII/excess MnIV system is a convenient and inexpensive solution to directly convert Csp2H into CP bonds. The reaction can be employed to functionalize P‐stereogenic H‐phosphinates since it is stereospecific. With
A few phosphinicacids, such as phenylphosphinic acids, 1-hydroxy-3-phospholene 1-oxides and 1-hydroxyphospholane oxides are esterified with simple alcohols in the presence of propylphosphonic anhydride (T3P®). If 1.1 equiv of the T3P® reagent is used, the esterifications are fast and efficient at 25° C. In the case of more reactive models it was enough to apply 0.66 equiv of T3P® at 85° C under microwave
A “green” variation of the Hirao reaction: the P–C coupling of diethyl phosphite, alkyl phenyl-<i>H</i>-phosphinates and secondary phosphine oxides with bromoarenes using a P-ligand-free Pd(OAc)<sub>2</sub> catalyst under microwave and solvent-free conditions
作者:György Keglevich、Erzsébet Jablonkai、László B. Balázs
DOI:10.1039/c4ra03292f
日期:——
The P–C coupling of diethyl phosphite, alkyl phenyl-H-phosphinates, diphenylphosphine oxide and dialkylphosphine oxides with bromoarenes may be performed in the presence of a P-ligand-free Pd(OAc)2 catalyst and triethylamine undermicrowave-assisted (MW) and, in almost all cases, solvent-free conditions to afford diethyl arylphosphonates, alkyl diphenylphosphinates, aryldiphenylphosphine oxides and
Manganese-Catalyzed and Mediated Synthesis of Arylphosphinates and Related Compounds
作者:Olivier Berger、Jean-Luc Montchamp
DOI:10.1021/acs.joc.9b01239
日期:2019.7.19
H-phosphinates and relatedcompounds was examined. A practical catalytic process with the air as the oxidant could not be found. However, an inexpensive and robust methodology was developed, using catalytic Mn(II) as the radical initiator and excess Mn(IV) as the stoichiometric oxidant. Using these conditions, the inter- and intramolecular arylation of phosphinylidene compounds has a broad scope, including