The low‐cost cobalt(II) catalyst has been used for the first time to achieve P(O)‐radical‐mediated bisfunctionalization of alkenes with diarylphosphine oxide and peroxides. This simple process is performed under mild conditions to afford a wide variety of phosphonation‐peroxidation products in a one‐pot manner. Computational studies are carried out to provide a theoretical support for the P(O)‐radical‐involved
A novel Cu-catalyzed addition/cyclization cascade of o-cyanoarylacrylamide has been developed for the synthesis of various phosphonylated quinoline-2,4(1H,3H)-diones.
Phosphides and arsenides as metal–halogen exchange reagents. Part 1. Dehalogenation of aliphatic dihalides
作者:Donal G. Gillespie、Brian J. Walker
DOI:10.1039/p19830001689
日期:——
yields of phosphorus-containing by-products. Similar reactions with 2,3-dichlorobuta-1,3-diene and 2-chlorobuta-1,3-diene give SN2′ rather than direct substitution products. Evidence is presented that adamantene is an initial product in the reaction of lithium diphenylphosphide with 1,2-di-iodo- and 1,2-dibromo-adamantane, but not with 1,2-dichloroadamantane, although 1- and 2-adamantyldiphenylphosphine
Visible light induced radical cascade cyclization of <i>ortho</i>-cyanoarylacrylamides with phosphine oxides for the preparation of phosphorylated quinoline-2,4(1<i>H</i>,3<i>H</i>)-dione
Visible light induced cascade cyclization of ortho-cyanoarylacrylamides with phosphineoxides for the preparation of phosphorylated quinoline-2,4(1H,3H)-dione. Products with moderate to good yields were efficiently isolated. A radical mechanism was proposed for this transformation.
可见光诱导邻氰芳基丙烯酰胺与氧化膦的级联环化,用于制备磷酸化喹啉-2,4(1 H ,3 H )-二酮。具有中等至良好收率的产品被有效分离。为这种转变提出了一种激进的机制。
Mn(III)-mediated phosphinoylation of aldehyde hydrazones: Direct “one-pot” synthesis of α-iminophosphine oxides from aldehydes
作者:Xue-Wei Bian、Ling Zhang、Adedamola Shoberu、Jian-Ping Zou
DOI:10.1016/j.tet.2021.132053
日期:2021.4
A “one-pot” strategy for the straightforward Mn(III)-mediated phosphinoylation of aldehyde hydrazones with diphenylphosphine oxide to furnish α-iminophosphine oxides is described. This mild and practical method allows the direct use of aldehydes as substrates in one pot to generate the hydrazones, which are then engaged “in situ” by the phosphorus reagent in the presence of Mn(OAc)3 oxidant. Thus,