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Showing 1 to 10 of 10 for “"PN ligands"”.
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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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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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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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"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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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 …