N,N,P-Pincer 镍配合物可有效催化醇与氧化苄基膦的反应,以良好的收率形成烯烃。该方案适用于多种底物,并且仅生成E构型烯烃。该方法还表现出良好的官能团相容性。甲氧基、甲硫基、三氟甲基、缩酮、氟、氯、溴、噻吩基和呋喃基均可接受。机理研究表明,该反应是通过醇催化脱氢生成醛或酮,然后在 KO t Bu 存在下与氧化苄基二苯基膦缩合进行的。
The controllable phosphorylations of thioesters were developed. When the reaction was catalyzed by a palladium catalyst, aryl or alkenyl phosphoryl compounds were generated through decarbonylative coupling, while the benzyl phosphoryl compounds were produced through deoxygenative coupling when the reaction was carried out in the presence of only a base.
carbon–heteroatom (C–P, C–O, C–S, and C–N) bonds via C–N cleavage of benzyl ammoniumsalts under transition-metal-free conditions was reported. The combination of t-BuOK and 18-crown-6 enabled a wide range of substituted benzyl ammoniumsalts to couple readily with different kinds of heteroatom nucleophiles, i.e. hydrogen phosphoryl compounds, alcohols, thiols, and amines. Good functional group tolerance was demonstrated
Copper-catalyzed C–P cross-coupling of arylmethyl quaternary ammonium salts via C–N bond cleavage
作者:Nutao Li、Feng Chen、Guanghui Wang、Qingle Zeng
DOI:10.1007/s00706-019-02535-y
日期:2020.1
AbstractA ligand-free copper-catalyzed C–P cross-coupling reaction of arylmethyl quaternary ammonium salts and diarylphosphine oxides in air is developed. Arylmethyl quaternary ammonium salts with various functional groups and a variety of dialkyl- and diarylphosphine oxides afford C–P cross-coupling products with good yields. This protocol requires no inert atmosphere, no ligand, and simple operation
Practical way for the synthesis of phosphine oxides and phosphine sulfides from benzyl alcohol derivatives
作者:Yutao Ma、Feng Chen、Jifeng Bao、Hao Wei、Min Shi、Feijun Wang
DOI:10.1016/j.tetlet.2016.04.035
日期:2016.6
The reaction of benzyl alcohol derivatives with Ph2PI generated in situ from Ph2PCl and NaI provides a facile way to the synthesis of pentavalent phosphine compounds with moderate to excellent yields.