Pallada- and platinacycle complexes of phosphorus ylides; synthesis, X-ray characterization, theoretical and electrochemical studies and application of Pd(II) complexes as catalyst in Suzuki-Miyaura coupling reaction
作者:Seyyed Javad Sabounchei、Asieh Sedghi、Ali Hashemi、Marjan Hosseinzadeh、Mehdi Bayat、Robert W. Gable
DOI:10.1002/aoc.3850
日期:2017.12
(6)). Cyclic voltammetry, elemental analysis, IR and NMR (1H, 13C and 31P) spectroscopic methods were used for characterization of the obtained compounds. Further, the structure of complexes 3 and 4 were characterized crystallographically. Palladacycles 3 and 4 were proved to be excellent catalysts for the Suzuki‐Miyaura coupling reactions of various aryl chlorides and arylboronic acids in mixed DMF/H2O
The Suzuki–Miyaura reaction of various aryl halides with aryl boronic acids using [Ph2PCH2PPh2CH=C(O)(C10H7)]PdCl2} as a catalyst has been investigated. The X-ray crystal structure of the catalyst reveals a five-membered chelate ring formed by coordination of the ligand through the phosphine group and the ylidic carbon atom to the metal center. This palladacycle exhibited excellent activities and reusability in the aqueous phase for the Suzuki cross-coupling reactions of arylboronic acids with aryl halides. The proposed protocol featured mild reaction conditions and notable simplicity and efficiency using Cs2CO3 as a base in water. The catalytic system could be reused four times without significant loss of activity.
Functionalized α-keto stabilized sulfonium ylides as highly active ligand precursors for palladium catalyzed Suzuki–Miyaura cross-couplings
作者:Seyyed Javad Sabounchei、Ali Hashemi
DOI:10.1016/j.inoche.2014.07.027
日期:2014.9
Abstract Five α-keto stabilizedsulfoniumylides as type (Me) 2 SCHC(O)C 6 H 4 - p -X (X = H, Br, NO 2 , CH 3 and OCH 3 ) L 1 – L 5 } were used as ligand precursors in the Suzuki–Miyaura cross-coupling reaction. The best catalytic performance was obtained by using a sulfoniumylide/Pd ratio of 2:1. The catalytic systems displayed high activities, which increased in the order R = NO 2 ( L 3 ) L 2
摘要 五种α-酮稳定的锍叶立德为 (Me) 2 SCHC(O)C 6 H 4 - p -X (X = H, Br, NO 2 , CH 3 和 OCH 3 ) L 1 – L 5 } 是在 Suzuki-Miyaura 交叉偶联反应中用作配体前体。通过使用 2:1 的锍叶立德/Pd 比获得最佳催化性能。催化系统显示出高活性,其增加顺序为 R = NO 2 (L 3 ) L 2 ) L 1 ) 3 ( L 4 ) 3 ( L 5 )。0.05 mol% PdCl 2 和 0.1 mol% L 5 的 DMF 在 130 °C 下,各种电子活化、失活和中性芳基卤化物和芳基硼酸之间的偶联反应在很短的反应时间内顺利进行,无需排除空气这使相应产品的收率良好。所有研究的配体在 Suzuki-Miyaura 交叉偶联中表现出非常高的活性,
Synthesis, X-ray structural and DFT studies of <i>n</i>-membered ring P, C-chelated complexes of Pd(II) and Pt(II) derived from unsymmetrical phosphorus ylides and application of Pd(II) complexes as catalyst in Suzuki reaction
作者:Seyyed Javad Sabounchei、Mohsen Sayadi、Mehdi Bayat、Asiyeh Sedghi、Robert W. Gable
DOI:10.1080/00958972.2017.1397640
日期:2017.11.17
phosphonium salts [Ph2P(CH2)nPPh2CH2C(O)C6H4-m-OMe]Br (n = 1 (S1) and n = 2 (S2)) were synthesized in the reaction of bis(diphenylphosphino)methane (dppm) and bis(diphenylphosphino)ethane (dppe) with 2-bromo-3ʹ-methoxy acetophenone, respectively. Further treatment with NEt3 gave the phosphorus ylides Ph2P(CH2)nPPh2C(H)C(O)C6H4-m-OMe (n = 1 (Y1) and n = 2 (Y2)). These ligands were treated with [MCl2(cod)] (M
DFT studies of the full mechanistic Suzuki–Miyaura reaction: synthesis, structural analysis and cytotoxicity of P,C-chelated palladium(II) and platinum(II) complexes
作者:Khadijeh Badpa、Seyyed Javad Sabounchei、Leila Hosseinzadeh、Robert W. Gable
DOI:10.1080/00958972.2020.1836624
日期:2020.11.16
Abstract The new Pd/Pt(II) complexes, [MBr2(Ph2PCH2PPh2C(H)C(O)C6H4-m-Br)] (M = Pd (1); M = Pt (2)), with unsymmetrical phosphorus ylide [Ph2PCH2PPh2=C(H)C(O)C6H4Br] (Y) have been synthesized through a simple procedure and were screened in a search for novel antitumor agents. These compounds were characterized by FT-IR, NMR (1H, 13C and 31P) spectroscopic methods and density functional theory methods