Catalytic activity of cationic diphospalladium(II) complexes in the alkene/CO copolymerization in organic solvents and water in dependence on the length of the alkyl chain at the phosphine ligands
作者:Ekkehard Lindner、Markus Schmid、Joachim Wald、Joachim A. Queisser、Michael Geprägs、Peter Wegner、Christiane Nachtigal
DOI:10.1016/s0022-328x(00)00154-6
日期:2000.5
analysis. In particular the water-soluble complexes 2c–k proved to be highly active in the carbonmonoxide/ethene copolymerization under biphasic conditions (water–toluene). In the presence of an emulsifier and methanol as activator the catalytic activity increased by a factor of about three. Also higher olefins could be successfully incorporated into the copolymerization with CO and the terpolymerization
一系列双膦配体CH 2(CH 2 PR 2)2(1a – x)(a – g:R =(CH 2)n OH,n = 1,3-8; h – k:R =(CH 2)n CH(CH 2 OH)2,n = 3–6;l – u:R = C n H 2 n +1,n = 1–8,10,14; v – x:R = CH(CH 3通过相应的1-烯烃的加氢磷酸化反应制备具有不同极性官能团的)2,(CH 2)2 CH(CH 3)2,(CH 2)3 CH(CH 3)2(方案1)。 H 2 P(CH 2)3 PH 2或格氏试剂与Cl 2 P(CH 2)3 PCl 2的反应。水溶性钯络合物[(R 2 P(CH 2)3 PR 2)Pd(OAc)2 ](2a - k)是通过Pd(OAc)2与配体1a - k在乙醇-乙腈中的反应获得的。用1l – x处理PdCl 2(NCC 6 H 5)2得到二氯钯(II)络合物[(R 2 P(CH
Iron Phosphine Catalyzed Cross-Coupling of Tetraorganoborates and Related Group 13 Nucleophiles with Alkyl Halides
作者:Robin B. Bedford、Peter B. Brenner、Emma Carter、Jamie Clifton、Paul M. Cogswell、Nicholas J. Gower、Mairi F. Haddow、Jeremy N. Harvey、Jeffrey A. Kehl、Damien M. Murphy、Emily C. Neeve、Michael L. Neidig、Joshua Nunn、Benjamin E. R. Snyder、Joseph Taylor
DOI:10.1021/om500518r
日期:2014.10.27
Iron phosphinecomplexes prove to be good precatalysts for the cross-coupling of alkyl, benzyl, and allyl halides with not only aryl triorganoborate salts but also related aluminum-, gallium-, indium-, and thallium-based nucleophiles. Mechanistic studies revealed that while Fe(I) can be accessed on catalytically relevant time scales, lower average oxidation states are not formed fast enough to be relevant
Branch‐Selective Alkene Hydroarylation by Cooperative Destabilization: Iridium‐Catalyzed
<i>ortho</i>
‐Alkylation of Acetanilides
作者:Giacomo E. M. Crisenza、Olga O. Sokolova、John F. Bower
DOI:10.1002/anie.201506581
日期:2015.12
An iridium(I) catalyst system, modified with the wide‐bite‐angle and electron‐deficient bisphosphine dFppb (1,4‐bis(di(pentafluorophenyl)phosphino)butane) promotes highly branch‐selective hydroarylation reactions between diverse acetanilides and aryl‐ or alkyl‐substituted alkenes. This provides direct and ortho‐selective access to synthetically challenging anilines, and addresses long‐standing issues
用宽咬角和缺电子双膦 d F ppb(1,4-双(二(五氟苯基)膦基)丁烷)改性的铱(I)催化剂体系可促进不同乙酰苯胺和乙酰苯胺之间的高度支链选择性加氢芳基化反应芳基或烷基取代的烯烃。这提供了对具有合成挑战性的苯胺的直接和邻位选择性获取,并解决了与相关弗里德尔-克来福特烷基化相关的长期存在的问题。
A new method for the synthesis of dichlorophosphines
作者:Alexander N. Tavtorkin、Sofia A. Toloraya、Eduard E. Nifant’ev、Ilya E. Nifant’ev
DOI:10.1016/j.tetlet.2010.12.048
日期:2011.2
A new method for the synthesis of alkyldichlorophosphines by chlorination of alkylphosphines with phosphorus pentachloride under mild conditions is described.
描述了一种在温和条件下用五氯化磷氯化烷基膦来合成烷基二氯膦的新方法。
Gold(i) complexes of water-soluble diphos-type ligands: Synthesis, anticancer activity, apoptosis and thioredoxin reductase inhibition
作者:Corinna Wetzel、Peter. C. Kunz、Matthias U. Kassack、Alexandra Hamacher、Philip Böhler、Wim Watjen、Ingo Ott、Riccardo Rubbiani、Bernhard Spingler
DOI:10.1039/c1dt10368g
日期:——
Gold(I) complexes of imidazole and thiazole-based diphos type ligands were prepared and their potential as chemotherapeutics investigated. Depending on the ligands employed and the reaction conditions complexes [L(AuCl)2] and [L2Au]X (X = Cl, PF6) are obtained. The ligands used are diphosphanes with azoyl substituents R2P(CH2)2PR2 R = 1-methylimidazol-2-yl (1), 1-methylbenzimidazol-2-yl (4), thiazol-2-yl (5) and benzthiazol-2-yl (6)} as well as the novel ligands RPhP(CH2)2PRPh R = 1-methylimidazol-2-yl (3)} and R2P(CH2)3PR2 R = 1-methylimidazol-2-yl (2)}. The cytotoxic activity of the complexes was assessed against three human cancer cell lines and a rat hepatoma cell line and correlated to the lipophilicity of the compounds. The tetrahedral gold complexes [(3)2Au]PF6 and [(5)2Au]PF6 with intermediate lipophilicity (logD7.4 = 0.21 and 0.25) showed significant cytotoxic activity in different cell lines. Both compounds induce apoptosis and inhibit the enzymes thioredoxin reductase and glutathione reductase.
研究人员制备了咪唑和噻唑二磷配体的金(I)配合物,并对其作为化疗药物的潜力进行了研究。根据所用配体和反应条件的不同,可以得到[L(AuCl)2]和[L2Au]X(X = Cl,PF6)配合物。使用的配体是带有偶氮取代基 R2P(CH2)2PR2 R = 1-甲基咪唑-2-基(1),1-甲基苯并咪唑-2-基(4)、噻唑-2-基 (5) 和苯并噻唑-2-基 (6)} 以及新型配体 RPhP(CH2)2PRPh R = 1-甲基咪唑-2-基 (3)} 和 R2P(CH2)3PR2 R = 1-甲基咪唑-2-基 (2)}。评估了这些配合物对三种人类癌细胞系和一种大鼠肝癌细胞系的细胞毒性活性,并将其与化合物的亲脂性联系起来。具有中等亲油性(logD7.4 = 0.21 和 0.25)的四面体金配合物 [(3)2Au]PF6 和 [(5)2Au]PF6 在不同细胞系中显示出显著的细胞毒性活性。这两种化合物都能诱导细胞凋亡并抑制硫代氧化还原酶和谷胱甘肽还原酶。