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 under microwave-assisted (MW) and, in almost all cases, solvent-free conditions to afford diethyl arylphosphonates, alkyl diphenylphosphinates, aryldiphenylphosphine oxides and
亚磷酸二乙酯,烷基苯基H-次膦酸酯,二苯基膦氧化物和二烷基膦氧化物与溴芳烃的P–C偶联可在无P配体的Pd(OAc)2催化剂和三乙胺存在下于微波辅助下进行(MW )和几乎所有情况下的无溶剂条件,分别得到芳基二乙基膦酸酯,烷基二苯基次膦酸酯,芳基二苯基膦氧化物和二烷基苯基膦氧化物。这是众所周知的Hirao反应的“最绿色”完成,现已发现该反应已普遍应用于具有不同反应性的各种> P(O)H物种,以及多种取代的溴苯。烷基苯基-H-phosphinates由苯基的MW-促进烷基化制备ħ在不存在任何溶剂的次膦酸。