69849-80-5Relevant academic research and scientific papers
Different properties of P,C-donor Pd(II) and Pt(II); spectroscopic and X-ray analysis, catalytic potential and anti-proliferative potency
Yousefi, Abed,Sabounchei, Seyyed Javad,Moazzami Farida, Seyed Hamed,Karamian, Roya,Rahmani, Nosrat,Gable, Robert W.
, p. 21 - 31 (2019/04/10)
This account describes our recent studies on pallada-and platinaphosphacycle complexes with an unsymmetrical phosphonium ylide, Ph2PC(CH2)PPh2 = C(H)C(O)C6H4-p-NO2 (Y), derived from 1,1-bis(diphenylphosphino)ethylene (dppee). These complexes have been prepared through reactions between (Y) and [MCl2(cod)] (M = Pd (C1) or Pt (C2); cod = 1,5-cyclooctadiene) in equimolar ratio in the hope of finding new compounds that may be useful in stereoselective catalysis and find use as antitumor metallodrugs. Characterization of these compounds was performed by elemental analysis, IR, 1H, 13C, and 31P NMR spectroscopic methods. The structures of the Pd and Pt complexes were determined by single crystal x-ray structural analyses, showing that both complexes consist of five-membered rings formed by coordination of the phosphorus ylide (Y) through the phosphine group and the ylidic carbon atom to the metal center. The catalytic activity of the complexes, using the Mizoroki–Heck and Suzuki-Miyaura cross-coupling reactions, have been evaluated and compared. Moreover, both compounds have been found to have antitumor activity against AGS (gastric carcinoma), MCF-7 (breast carcinoma) and A549 (non-small lung carcinoma) cells with the average of IC50 values from 61.19 to 290.17 μM. Generally, C2 reveals high anticancer activity than C1.
Linear polystyrene-stabilized Rh(III) nanoparticles for oxidative coupling of arylboronic acids with alkenes in water
Ohtaka, Atsushi,Fukui, Shiho,Sakon, Akira,Hamasaka, Go,Uozumi, Yasuhiro,Shinagawa, Tsutomu,Shimomura, Osamu,Nomura, Ry?ki
, p. 1 - 7 (2018/08/10)
Linear polystyrene-stabilized Rh(III) nanoparticles (PS-Rh(III)NPs) were obtained when an aqueous solution of RhCl3 was stirred at 90 °C in the presence of KOH, 4-methylphenylboronic acid, and linear polystyrene, as indicated by X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). PS-Rh(III)NPs exhibited high catalytic activity for the oxidative coupling of arylboronic acids with alkenes. In contrast, PS-Rh(0)NPs prepared with NaBH4 had little activity for the same reaction.
I2-mediated oxidative C-N bond formation for metal-free one-pot synthesis of di-, tri-, and tetrasubstituted pyrazoles from α,β-unsaturated aldehydes/ketones and hydrazines
Zhang, Xinting,Kang, Jinfeng,Niu, Pengfei,Wu, Jie,Yu, Wenquan,Chang, Junbiao
, p. 10170 - 10178 (2015/02/19)
An I2-mediated metal-free oxidative C-N bond formation methodology has been established for the regioselective pyrazole synthesis. This practical and eco-friendly one-pot protocol requires no isolation of the less stable intermediates hydrazone
Sequential aldol Condensation-Transition metal-Catalyzed addition reactions of aldehydes, methyl ketones, and arylboronic acids
Liao, Yuan-Xi,Xing, Chun-Hui,Israel, Matthew,Hu, Qiao-Sheng
supporting information; experimental part, p. 2058 - 2061 (2011/06/19)
Sequential aldol condensation of aldehydes with methyl ketones followed by transition metal-catalyzed addition reactions of arylboronic acids to form β-substituted ketones is described. By using the 1,1′;-spirobiindane- 7,7′;-diol (SPINOL)-based phosphite, an asymmetric version of this type of sequential reaction, with up to 92% ee, was also realized. Our study provided an efficient method to access β-substituted ketones and might lead to the development of other sequential/tandem reactions with transition metal-catalyzed addition reactions as the key step.
Synthesis of α,β-unsaturated aryl esters via Heck reaction of unsymmetrical aryl tellurides
Stefani, Hélio A.,Pena, Jesus M.,Gueogjian, Kemilla,Petragnani, Nicola,Vaz, Boniek G.,Eberlin, Marcos N.
scheme or table, p. 5589 - 5595 (2011/02/22)
A variety of α,β-unsaturated aryl esters were prepared by the direct reaction of unsymmetrical aryltellurides and ethyl acrylate, catalyzed by PdCl2 via a Heck cross-coupling reaction.
Evaluation of some thiosemicarbazones of arylidene ketones and analogues for anticonvulsant activities
Dimmock, J. R.,Jonnalagadda, S. S.,Hussein, S.,Tewari, S.,Quail, J. W.,et al.
, p. 581 - 588 (2007/10/02)
A number of thiosemicarbazones of arylidene and aryl ketones were prepared as candidate anticonvulsant agents.X-Ray crystallography of 4-(4-methylphenyl)-3-buten-2-one thiosemicarbazone (1a) revealed that it had the E configuration with respect to both olefinic and carbimino double bonds.Other structural features of this anticonvulsant compound were noted.Most of the compounds displayed activity in the MES and/or scMET tests and of particular interest was acetophenone thiosemicarbazone (4b) which had good activity when administered by the intraperitoneal and oral routes.High resolution 1H NMR spectroscopy of selected compounds in dimethylsulphoxide-d6 revealed that in most cases equilibrium was attained of mixtures of E and Z isomers pertaining to the stereochemistry of the carbimino group.In general this isomeric ratio was dependent on the size of the R group attached to the carbimino function.
