Selective C–P(O) Bond Cleavage of Organophosphine Oxides by Sodium
摘要:
Sodium exhibits better efficacy and selectivity than Li and K for converting Ph3P(O) to Ph2P(OM). The destiny of PhNa co-generated is disclosed. A series of alkyl halides R4X and aryl halides ArX all react with Ph2P(ONa) to produce the corresponding phosphine oxides in good to excellent yields.
Efficient nickel-catalyzed phosphinylation of C–S bonds forming C–P bonds
作者:Jia Yang、Jing Xiao、Tieqiao Chen、Shuang-Feng Yin、Li-Biao Han
DOI:10.1039/c6cc06048j
日期:——
The first nickel-catalyzed phosphinylation of C–S bonds forming C–P bonds is developed. The reaction can proceed readily with the simple Ni(cod)2 at a loading down to 0.1 mol% at the 10 mmol scale. Various aryl sulfur compounds, i.e. sulfides, sulfoxides and sulfones all couple with P(O)–H compounds to produce the corresponding organophosphorus compounds, which provides an efficient new method for the construction of C–P bonds.
Nickel-catalyzed C–P cross-coupling of diphenylphosphine oxide with aryl chlorides
作者:Hong-Yu Zhang、Meng Sun、Yan-Na Ma、Qiu-Ping Tian、Shang-Dong Yang
DOI:10.1039/c2ob26874d
日期:——
diarylphosphine oxide compounds via a Ni-catalyzed cross-coupling of arylchlorides with R2P(O)H has been developed. Notably, this process exhibits the following very attractive features: (i) the process is simpler and operates under mild reaction conditions; (ii) the process is generally cheaper in part because the more accessible arylchloride is used to form the C–P bond; (iii) the process avoids the need
Cu/
<scp>Picolinamides‐Catalyzed</scp>
Coupling of (Hetero)aryl Halides with Secondary Phosphine Oxides and Phosphite
<sup>†</sup>
作者:Chao Fang、Bangguo Wei、Dawei Ma
DOI:10.1002/cjoc.202100354
日期:2021.11
Some 4-hydroxy-picolinic acid derived amides were revealed as more efficient ligands for Cu-catalyzed coupling of (hetero)aryl halides with secondary phosphine oxides and phosphites. Only 3—5 mol% CuI and ligands were required to ensure coupling with a number of (hetero)aryl bromides and iodides to complete at 120 oC in 10—20 h.
一些 4-羟基-吡啶甲酸衍生的酰胺被揭示为更有效的配体,用于(杂)芳基卤化物与仲氧化膦和亚磷酸酯的铜催化偶联。仅需要 3-5 mol% CuI 和配体即可确保与许多(杂)芳基溴化物和碘化物的偶联在 120 o C 下在 10-20 小时内完成。
A cyclodiphosphazane based pincer ligand, [2,6-{μ-(<sup>t</sup>BuN)<sub>2</sub>P(<sup>t</sup>BuHN)PO}<sub>2</sub>C<sub>6</sub>H<sub>3</sub>I]: Ni<sup>II</sup>, Pd<sup>II</sup>, Pt<sup>II</sup> and Cu<sup>I</sup> complexes and catalytic studies
作者:Guddekoppa S. Ananthnag、Joel T. Mague、Maravanji S. Balakrishna
DOI:10.1039/c4dt02810d
日期:——
Synthesis and late-transition metal complexes of pincer capable cyclodiphosphazane, 2,6-μ-(tBuN)2P(tBuHN)PO}2C6H3I (1) are described. The condensation of 2-iodoresorcinol with cis-ClP(μ-NtBu)2PN(H)tBu} produced a difunctional derivative 1 in good yield. The treatment of Ni(COD)2, Pd2(dba)3·CHCl3 or Pt(PPh3)4 with 1 afforded pincer complexes [2,6-μ-(tBuN)2P(tBuHN)PO}2C6H3MI] (2 M = Ni; 3 M = Pd and
描述了具有钳子能力的环二磷氮烷2,6- μ-(t BuN)2 P(t BuHN)PO} 2 C 6 H 3 I(1)的合成和后过渡金属配合物。2- iodoresorcinol用的缩合顺- CLP(μ-N吨丁基)2 PN(H)吨卜}产生的双官能衍生物1以良好的收率。Ni的处理(COD)2,钯2(DBA)3 ·氯仿3或Pt(PPH 3)4与1得钳夹配合物[2,6- μ-(t BuN)2 P(t BuHN)PO} 2 C 6 H 3 MI](2 M = Ni;3 M = Pd和4 M = Pt)。配合物3与卤化铜的反应导致形成由菱形Cu(μ-X)} 2个单元,[Cu(μ-X)} 2 } μ-(t BuN)2 P桥接的异双金属配合物(t BuHN)PO} 2 C 6 H 3 PdI](5 X = I和6X = Br)。的晶体结构1-3,5和6通过单晶X射线衍射研究建立。测试了钯配合物3在微波辐射下对二苯基膦氧化物(Ph
Visible-Light-Induced Nickel-Catalyzed P(O)–C(sp<sup>2</sup>) Coupling Using Thioxanthen-9-one as a Photoredox Catalysis
作者:Da-Liang Zhu、Shan Jiang、Qi Wu、Hao Wang、Lu-Lu Chai、Hai-Yan Li、Hong-Xi Li
DOI:10.1021/acs.orglett.0c03892
日期:2021.1.1
developed for photocatalytic P(O)–C(sp2) coupling of (hetero)aryl halides with H-phosphine oxides or H-phosphites under the irradiation of visible light or sunlight. The thioxanthen-9-one/nickel dual catalysis mediates this phosphonylation to give arylphosphine oxides and arylphosphonates in moderate to excellent yields. This transformation is widely tolerant to a range of functional groups and proceeds