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Metal catalyzed cascade reactions (2006)

Müller, Thomas J. J.

Berlin Heidelberg : Springer-Verlag GmbH

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Schlagwort(e): Catalysis ; Chemistry, Organic ; Chemistry, inorganic ; Chemistry ; Aufsatzsammlung ; Tandem-Reaktion ; Übergangsmetallkomplexe ; Katalysator

Beschreibung / Inhaltsverzeichnis: Klappentext: Transition metal-catalyzed cascade reactions are an elegant approach to complex molecular scaffolds. Besides their esthetics and increase in structural complexity, they have also become mechanistic challenges for the combination of organometallic elementary steps. As a consequence, cascade reactions have revolutionized synthetic strategies and conceptual thinking. The authors highlight cyclization via carbopalladation and acylpalladation and Heck-pericyclic sequences. They discuss p-allyl palladium-based cascade reactions, Michael-type additions as an entry to transition-metal-promoted cyclizative transformations, and sequential or consecutive palladium-catalyzed processes, and show Pauson-Khand cascades, metal-catalyzed cyclizations of acyclic precursors, as well as cascade and sequential ruthenium-catalyzed transformations. Therefore, the reader finds overview of an exciting and highly dynamic field of a new and innovative methodological concept.

Materialart: Online-Ressource

Seiten: Online-Ressource (VIII, 339 S.) , zahlr. graph. Darst.

Ausgabe: Online-Ausg. 2006 Springer eBook Collection. Chemistry and Materials Science

ISBN: 9783540329596

Serie: Topics in organometallic chemistry 19

URL: http://dx.doi.org/10.1007/11603696

URL: http://www.gbv.de/dms/bowker/toc/9783540329589.pdf

DOI: 10.1007/11603696

DDC: 540

RVK:

VH 9700

Sprache: Englisch

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Online-Ressource

Metal Catalyzed Cascade Reactions (2006)

Müller, Thomas J. J.

Berlin, Heidelberg : Springer Berlin Heidelberg

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Schlagwort(e): Chemistry, inorganic ; Chemistry, Organic ; Catalysis ; Chemistry ; Aufsatzsammlung ; Tandem-Reaktion ; Übergangsmetallkomplexe ; Katalysator

Materialart: Online-Ressource

Seiten: Online-Ressource (IX, 339 p. Also available online, digital)

ISBN: 9783540329596

Serie: Topics in Organometallic Chemistry 19

URL: https://doi.org/10.1007/11603696

URL: https://swbplus.bsz-bw.de/bsz276366972cov.jpg

DOI: 10.1007/11603696

Sprache: Englisch

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Digitale Medien

Synthesis and Structure of Allenyl-Substituted η6-Benzene(tricarbonyl)-chromium Complexes (1997)

Müller, Thomas J. J. ; Ansorge, Markus

Weinheim : Wiley-Blackwell

Berichte der deutschen chemischen Gesellschaft 130 (1997), S. 1135-1139

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ISSN: 0009-2940

Schlagwort(e): Arene complexes ; Chromium ; Allenes ; Rearrangements ; Chemistry ; Inorganic Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: The Cr(CO)3-complexed η6-phenylpropargylic alcohols 3 react in a displacement rearrangement with thionyl chloride or chlorodiphenylphosphane to give the chloro- or phosphoryl allenyl substituted η6-phenyl complexes 4 and 6, respectively. In the X-ray crystal structure of the novel organometallic allenic derivatives 4b and 6b the vicinal chloro or phosphoryl substituent and the benzene(tricarbonyl)chromium fragment are arranged coplanarily. Palladium/copper-catalyzed couplings of the chloroallene 4b with terminal alkynes disclose a facile access to ynallene derivatives 8, novel carbon-rich organometallic π-systems.

Zusätzliches Material: 1 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/cber.19971300816

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Digitale Medien

Palladium-Copper-Catalyzed Coupling of Tricarbonylchromium-Complexed Phenylacetylene with Iodoarenes - A Facile Access to Alkynyl-Bridged Cr(CO)3-Complexed Benzenes (1996)

Müller, Thomas J. J. ; Lindner, Hans Jörg

Weinheim : Wiley-Blackwell

Berichte der deutschen chemischen Gesellschaft 129 (1996), S. 607-613

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ISSN: 0009-2940

Schlagwort(e): Arene complexes ; Chromium compounds ; Alkynes ; Catalysis ; Coupling reactions ; Chemistry ; Inorganic Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: The palladium-copper-catalyzed coupling of the tricarbonyl-chromium-complexed chlorobenzene 1 with (trimethylsilyl)-acetylene gives tricarbonyl{η6-[(trimethylsilyl)ethynyl]-benzene}chromium(0) (2) in high yield. After desilylation of 2 tricarbonyl[η6-(ethynylbenzene)]chromium(0) (3) is obtained quantitatively. Using the palladium-copper-catalyzed methodology, we can readily introduce Cr(CO)3-complexed phenylethynyl units by a multifold coupling of 3 with iodobenzene, 1,2-, 1,3-, 1,4-di- and 1,3,5-tiiodobenzene (4a-e) or 1 to give polynuclear Cr(CO)3-complexed (phenylethynyl)benzenes 5a-e and doubly Cr(CO)3-complexed tolane 6 in good to moderate yield. The crystal structure analyses of μ3-{η6:η6:η6[1,3,5-benzenetriyltris(2,1-ethynediyl)]tris(benzene)}tris[tricarbonylchromium(0)] (5e) and μ-{η6:η6-[1,2-ethynediylbis(benzene)]}bis[tricarbonylchromium(0)] (6) reveal that the tricarbonylchromium tripods in the same molecule are arranged in antiparallel syn-eclipsed conformations. The Eglington coupling of 3 affords a doubly Cr(CO)3-complexed diphenylbutadiyne 7 in excellent yield.

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/cber.19961290604

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Digitale Medien

Synthesis and Substituent Interactions of Tricarbonylchromium-complexed Arylalkynylbenzenes - Novel Organometallic Push-pull ChromophoresDedicated to Prof. Dr. Rudolf Gompper on the occasion of his 70th birthday. (1996)

Müller, Thomas J. J. ; Ansorge, Markus ; Lindner, Hans Jörg

Weinheim : Wiley-Blackwell

Berichte der deutschen chemischen Gesellschaft 129 (1996), S. 1433-1440

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ISSN: 0009-2940

Schlagwort(e): Arene complexes ; Chromium compounds ; Substituent effects ; Push-pull chromophores ; Chemistry ; Inorganic Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: The tricarbonylchromium complexes chlorobenzene 1 reacts with terminal alkynes 2 through a palladium-copper-catalyzed coupling to give a variety of Cr(CO)3-complexed phenylethynyl arenes, heteroarenes and ferrocene 3 in good to excellent yield. Due to the electron-withdrawing nature of the Cr(CO)3 group these novel complexes can be regarded as organometallic push-pull chromophores. Analogously, the corresponding free ligands 4 (phenylethynyl arenes, heteroarenes and ferrocene) were synthesized by coupling iodobenzene and 2. The crystal structure analysis of the singly Cr(CO)3-complexed tolane 3e reveals a strong deviation from coplanarity of both phenyl rings by an angle of 50.9(2)° presumably due to crystal packing. Correlations are established between selected substituent parameters (σP, σI, σR, σP+ and Δπ) and the carbonyl carbon resonances in the 13C-NMR spectra for the complexes 3. The overall electronic substituent effect is transmitted to the carbonyl groups by both mesomeric and inductive mechanisms. The push-pull complexes 3 display relatively small negative solvochromicities of longest wavelength absorption band (MLCT band).

Zusätzliches Material: 3 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/cber.19961291206

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