Comparative properties of fluorous phosphine ligand complexes: W(CO)5LF. Crystal structure of W(CO)5P(C6H4-4-CH2CH2(CF2)7CF3)3
摘要:
The compounds W(CO)(5)P(C6H4-4-CH2CH2(CF2)(7)CF3)(3) (1) and W(CO)(5)P(CH2CH2(CF2)(5)CF3)(3) (2) were synthesized in order to probe the electronic and physical effects of ligation by perfluorocarbon substituted tertiary phosphine ligands in a W(CO)(5)L complex. The pi-accepting ability of the fluorous phosphines was found to rank with non-fluorous comparators as P(CH2CH2(CF2)(5)CF3)(3) > P(C6H4-4-CH2CH2(CF2)(7)CF3)(3) > PPh3 > P(p-tolyl)(3) > P(n-octyl)(3). The X-ray crystal structure of W(CO)(5)P(C6H4-4-CH2CH2(CF2)(7)CF3)(3) shows strong intermolecular association of fluorous components but confirms that the parafluorocarbon subtituents have an insignificant effect on the tungsten coordination environment. Partition coefficients (toluene/perfluoromethylcyclohexane) were measured for compounds 1 and 2. (C) 2009 Elsevier B.V. All rights reserved.
Suzuki C−C couplings were performed in high yields in a fluorousbiphase system applying the four differently perfluoro-tagged Pd complexes 2a – d. All four complexes showed similar catalytic activities in the coupling of electron-rich or electron-deficient bromoarenes 3a – e and arylboronic acids 4a – c (Tables 1 and 2). Furthermore, we were able to show that all four Pd complexes could be recycled
been achieved by Heck reactionbetween perfluoroalkenes and arenediazonium salts, catalysed by palladium acetate. Subsequent transition metalcatalysed hydrogenation of the doublebond afforded a large variety of aromatic compounds bearing an affinity for fluorous solvents. Formation of perfluoroalkylated phosphane ligands and their use in palladium-catalysed coupling between potassium trifluoro(vinyl)borates
Fluorous triosmium clusters. Preparation, properties, and reactivity of Os3(CO)11{P(CH2CH2(CF2)5CF3)3} and Os3(CO)10{P(CH2CH2(CF2)5CF3)3}2. Crystal structure of Os3(CO)9(PPh3)2{P(CH2CH2(CF2)5CF3)3}. Ring opening metathesis polymerization of norbornene by (μ-H)2Os3(CO)9{P(C6H4-4-CH2CH2(CF2)7CF3)3}
作者:Thomas J. Malosh、John R. Shapley
DOI:10.1016/j.jorganchem.2010.03.026
日期:2010.6
derivatives, e.g., Os3(CO)11P(CH2CH2(CF2)5CF3)3} (1) and Os3(CO)10P(CH2CH2(CF2)5CF3)3}2 (2) have been synthesized in order to assess their properties in fluorocarbon, or fluorous, phases. Cluster 1 reacts with PPh3 above 100 °C to substitute one or two carbonyl ligands and provide the mixed ligand derivatives Os3(CO)10(PPh3)P(CH2CH2(CF2)5CF3)3}, (3) and Os3(CO)9(PPh3)2P(CH2CH2(CF2)5CF3)3}, (4). The crystal
Binuclear ruthenium complexes of fluorous phosphine ligands: Synthesis, properties, and biphasic catalytic activity. Crystal structure of [Ru(μ-O2CMe)(CO)2P(CH2CH2(CF2)5CF3)3]2
作者:Thomas J. Malosh、Scott R. Wilson、John R. Shapley
DOI:10.1016/j.jorganchem.2009.06.014
日期:2009.9
The fluorocarbon soluble, binuclear ruthenium(I) complexes [Ru(μ-O2CMe)(CO)2LF]2, where LF is the perfluoroalkyl substituted tertiary phosphine, P(C6H4-4-CH2CH2(CF2)7CF3)3, or P(CH2CH2(CF2)5CF3)3, were synthesized and partition coefficients for the complexes in fluorocarbon/hydrocarbon biphases were determined. Catalytic hydrogenation of acetophenone to 1-phenylethanol in benzotrifluoride at 105 °C
Use of Perfluorinated Phosphines to Provide Thermomorphic Anticancer Complexes for Heat-Based Tumor Targeting
作者:Anna K. Renfrew、Rosario Scopelliti、Paul J. Dyson
DOI:10.1021/ic9020433
日期:2010.3.1
A series of compounds of general formula [Ru(eta(6)-arene)(pta)(PR3)Cl]BF4 (arene = p-cymene or 4-phenyl-2-butanol; pta = 1,3,5-triaza-7-phosphatricyclo[3.3.1.1]decane, PR3 = PPh2(p-C6H4C2H4C8F17), PPh(p-C6H4C2H4C8F17)(2), P(p-C6H4C2H4C6F13)(3), PPh3 or P(p-C6H4F)(3)) have been prepared and characterized by spectroscopic methods. The structure of [Ru(eta(6)-p-cymene)(pta)Cl(P(p-C6H4F)(3))]BF4 has also been established in the solid state by X-ray crystallography. The cytotoxicities of the compounds were determined in the A2780 and A2780 cisplatin-resistant cell lines revealing that the fluorinated phosphines significantly increase antiproliferative activity relative to their bis-chloride precursors. Two of the complexes were found to be thermoresponsive, that is, showing poor water solubility at 37 degrees C and good solubility at 42 degrees C, the temperature of a heated tumor, providing a method of tumor targeting. Incubation at 42 degrees C for 2 h resulted in improved cytotoxicities for two of the complexes.