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Noskowska, Małgorzata; Śliwińska, Elżbieta; Duczmal, Wojciech

doi:10.1023/a:1026064708867

Cited by 31 publications

(25 citation statements)

References 16 publications

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“…However, based on the optical data, which are the same as those of phosphine 3 a , [CuI( 3 a )] appears to dissociate at the low concentrations used to record such spectra ( c =1.0×10 −6 mol L −1 ). Complex [PdCl 2 ( 3 b ) 2 ] was synthesized from [PdCl 2 (MeCN) 2 ] and 3 b in 88 % yield …”

Section: Resultsmentioning

confidence: 90%

Observing Initial Steps in Gold‐Catalyzed Alkyne Transformations by Utilizing Bodipy‐Tagged Phosphine–Gold Complexes

Vasiuta

Plenio

2016

Chemistry A European J

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The Pd-catalyzed reactions of 3-chloro-bodipy with R2 PH (R=Ph, Cy) provide nonfluorescent bodipy-phosphines 3-PR2 -bodipy 3 a (R=Ph) and 3 b (R=Cy; quantum yield Φ<0.001). Metal complexes such as [AgCl(3 b)] and [AuCl(3 b)] were prepared and shown to display much higher fluorescence (Φ=0.073 and 0.096). In the gold complexes, the level of fluorescence was found to be qualitatively correlated with the electron density at gold. Consequently, the fluorescence brightness of [AuCl(3 b)] increases when the chloro ligand is replaced by a weakly coordinating anion, whereas upon formation of the electron-rich complex [Au(SR)(3 b)] the fluorescence is almost quenched. Related reactions of [AuCl(3 b)] with [Ag]ONf)] (Nf= nonaflate) and phenyl acetylenes enable the tracking of initial steps in gold-catalyzed reactions by using fluorescence spectroscopy. Treatment of [AuCl(3 b)] with [Ag(ONf)] gave the respective [Au(ONf)(3 b)] only when employing more than 2.5 equivalents of silver salt. The reaction of the "cationic" gold complex with phenyl acetylenes leads to the formation of the respective dinuclear cationic [{(3 b)Au}2 (CCPh)](+) and an increase in the level of fluorescence. The rate of the reaction of [Au(ONf)(3 b)] with PhCCH depends on the amount of silver salt in the reaction mixture; a large excess of silver salt accelerates this transformation. In situ fluorescence spectroscopy thus provides valuable information on the association of gold complexes with acetylenes.

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Section: Resultsmentioning

confidence: 90%

Observing Initial Steps in Gold‐Catalyzed Alkyne Transformations by Utilizing Bodipy‐Tagged Phosphine–Gold Complexes

Vasiuta

Plenio

2016

Chemistry A European J

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“…[59][60][61] All fluorinated bromobenzene derivatives 2a-m have been obtained from commercial sources. The resulting coupling products 4a-m have been purified by column chromatography.…”

Section: Resultsmentioning

confidence: 99%

A comprehensive study of the effects of spectator ligands, transition metals and lithium halide additives on the efficiency of iron, nickel and palladium-catalyzed cross-coupling reactions of cyclohexyl magnesium bromide with fluorinated bromobenzenes

Dahadha¹,

Imhof²

2013

Arkivoc

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Thirteen mono-, bis-and trifluorinated bromobenzene derivatives have been coupled with cyclohexyl magnesium bromide or the corresponding lithiumchloride or lithiumbromide adducts. Iron, nickel and palladium complexes of the general formula [MCl2(dppx)] (x = (CH2)n, n = 1, 2, 3) have been used as the precatalysts. Palladium based catalysts give high yields of the coupling product with the Grignard reagent itself whereas lithium halides are needed as additives to achieve comparable efficiencies if nickel and iron catalysts are used. Yields also depend on the chain length of the bridging units and on the fact whether fluorine substituents are present in ortho position with respect to bromine.

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“…Apart from typical palladium complexes and Pd(OAc) 2 two novel compounds with ÀSnCl 3 ligands ([PdCl(SnCl 3 )-(P{p-Tol} 3 ) 2 ], [Pd 2 Cl 2 (SnCl 3 ) 2 (P{p-Tol} 3 ) 2 ]) were also applied. They are known to facilitate reduction of Pd(II) to in situ generated catalytically active Pd(0) species [29,30].…”

Section: Resultsmentioning

confidence: 99%

“…Triethylamine (Fluka) was purified using standard method [38]. The 1 H and 29 Si NMR spectra were recorded using a Bruker MSL 200 MHz and a Bruker DRX 500 MHz spectrometers in CDCl 3 solutions. GC-MS (EI) analyses were run on a Thermo-Quest apparatus using 30 m DB-1 column (the temperature was programmed as follows: 50°C (2 min), then a linear increase at the rate of 10°C/min up to isotherm of 250°C (10 min).…”

Section: Generalmentioning

confidence: 99%