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Showing 1 to 18 of 18 for “"N′ ligands"”.
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Metallodendrimers as catalysts for C-C coupling reactions
… of ferrocenylimine and G1 dendrimeric N,N′ ligands, and their palladium(II) complexes. The ligands L1 – L4 were synthesized following Schiff base condensation reactions. The ferrocenylimine ligands L1 and L2 were prepared from ferrocenecarboxaldehyde and 1,3-diaminopropane or DAB-4-(NH2)4, …
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New C 1- and C 2-symmetric sulfoximines : synthesis and application in enantioselective metal catalysis
… C1- and C2-symmetric sulfoximines (N,N- and P,N-ligands) for enantioselective metal catalysis is described. Guided by the excellent level of enantioselectivity observed using aminosulfoximine in the Cu-catalyzed Mukaiyama-aldol reaction, modifications of this class of potential ligand by …
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Novel P,N-Ligand Stabilized Transition Metal Complexes as Efficient Catalysts for Organic Syntheses
… the context of this work a library of novel P,N-ligands was synthesized and reacted with several transition metals with the aim to prepare active complexes for the efficient application in the field of homogeneous catalysis. Besides the synthesis and full characterization of these P,N-ligand …
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Synthesis and application of pinene-pyridine derivatives in asymmetric catalysis
… were synthesised and applied as efficient P,N-ligands for the enantioselective palladium(II)-catalysed Baeyer-Villiger oxidation of prochiral 3-substituted cyclobutanones to furnish chiral γ-butyrolactones in up to 81% ee. Complexes of these ligands with iridium can also promote asymmetric …
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Synthesis and characterization of nickel, palladium and chromium complexes as olefin oligomerization catalysts
… N-functionalized 2-phosphinobenzaldimino (P^N) ligands (L) bearing 3-picolyl (41), furfuryl (42), thiophene-2-methyl (43), thiophene-2-ethyl (44), and benzyl (45) groups have been prepared in good yield. In addition, 2-iminopyridyl (N^N) (46), 2-bromobenzaldimino (47), and 2-phenoxyimino (O^N) …
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Cyclometalated Platinum β-Diketiminate Complexes
… complexes with ancillary β-diketiminate (NacNac) ligands, prepared by a general synthetic route are described. Two different cyclometalating (C^N) ligands―2-phenylpyridine (ppy) and 2-(2,4-difluorophenyl)pyridine (F2ppy)―are used in concert with two different fluorinated NacNac ligands (NacNacF6 …
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Applications of planar-chiral phosphaferrocene-oxazolines in asymmetric catalysis and enantioselective desymmetrization by carbon nucleophiles in the presence of chiral ligands
… phosphaferrocene-oxazolines, a new class of P,N-ligands, are described. The modular nature of their structure allows easy access to a number of analogues in enantiomerically pure forms, facilitating the easy tunability of the chiral environment. These ligands are then applied to several …
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Synthesis of chiral phosphino-sulfoximines through phospha-Michael addition and their evaluation as 1,5-P,N-Ligand in asymmetric allylic alkylation
… the availability of several classes of P,N-ligands, there is still a quest for this new type of ligands for many catalytic applications. This work describe the synthesis of new phosphino-sulfoximines and their application as 1,5-P,N-ligand in palladium-catalyzed asymmetric allylic …
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Synthesis and application of chiral dienes and chiral imidates as ligands for transition metal catalysis
… ligandclasses have been studied: chiral diene ligands and chiral imidate ligands. We developed a novel route to synthesize chiral disubstituted bicyclo[2.2.1]heptadienes (R= i-Bu, c-Hex, Benzyl and allyl) starting from enantiomerically pure bistriflate. The synthesized diene ligands were tested …
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Metallkomplexe als Katalysatoren für selektive Olefinoligomerisierungen
… we investigated the syntheses of novel organic ligands and the respective metal complexes, to be applied for ethylene and propylene oligomerisation. A group of tridentate imino-ligands was synthesised, which includes the 2,6-bis(imino)pyridines 1-2, the 2,6-diacetyl-monoiminopyridine 3, the …
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"The New Chemistry" - Sustainable Catalysis with Alcohols
… complexes stabilized by anionic P,N- or P,N,P-ligands. These complexes were used in homogeneous catalysis. Furthermore, mechanistic studies were performed to provide an insight into the catalytic cycles. Synthesis protocols for a multitude of different product classes have been developed. The …
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N-Ligand Stabilized Lanthanide Complexes
A series of lanthanide complexes stabilized by N-ligands has been synthesized. Most of these complexes have been structurally characterized. The overall results emphasize the importance of the steric bulk of the applied ligands to stabilize various lanthanide complexes with a distinct reactivity. …
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Estudio de diferentes estrategias para la síntesis de compuestos de oro(I) con propiedades luminiscentes de alta eficiencia
Gold(I) complexes bearing P- and N-ligands constitute a very interesting class of molecular materials as they can give rise to novel structural and photophysical properties due to their great coordinative versatility. The properties of these compounds can be modulated depending on the type of …
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Síntesis y Caracterización de Complejos de Paladio (II) con Ligandos (2-difenilfosfanil-benciliden)-anilina : Investigación y Desarrollo de un Sistema para Almacenamiento de Hidrógeno
… complexes of palladium (II) with P,N-donor ligands are synthesized and characterized. Theligands are able to act as bi- and/or tri-chelating, where there is applied the basic chemistry developed in the group of investigation AMIDO. The catalytic activity of these complexes in reactions of …
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Electronic response of phosphorus and nitrogen based ligands on metal coordination
Phosphorus and nitrogen containing ligands were examined in terms of their coordination flexibility. Combining these donor atoms of different hardness or softness in one molecule leads to the design of polyfunctional, ambidentate ligand systems with unique properties, because the different features …
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Small molecule binding to electrophilic trigonal pyramidal platinum, palladium, and nickel
… characterized examples of weakly-donating ligands bound in the fifth, apical coordination site. Of particular interest is the structure of the toluene adduct, which suggests a possible interaction between the platinum center and an aryl C-H bond. When the ligand phosphines are instead …
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Alternativní příprava 1-(difenylfosfino)-1'-(N,N-dimethylaminomethyl)ferrocenu
Byl navržen a optimalizován nový, přímočařejší a efektivnější postup přípravy 1- (difenylfosfino)-1'-(N,N-dimethylaminomethyl)ferrocenu, využívající 1-brom-1'-(difenyl- fosfino)ferrocenu jako výchozí látku a Eschenmoserovu sůl jako aminomethylační činidlo. Čistota tímto způsobem připraveného …