Výsledky vyhledávání - "Petra Wedemann"

Nanostructured nickel-clusters as catalysts in [3+2]cycloaddition reactions

Autor: Paul Binger, Rolf Breinbauer, Manfred T. Reetz, Petra Wedemann

Publikováno v: Tetrahedron. 54:1233-1240

Preformed Ni-clusters stabilized by tetraoctyl- or tetradodecylammonium bromide are readily available by electrochemical fabrication, the average size of the particles being 2.5 nm. Colloidal solutions of such clusters effectively catalyze the [3+2]c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d5f411fe975fe7ed3d1a4882c1b5911e
https://doi.org/10.1016/s0040-4020(97)10221-6

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Formal Asymmetric Synthesis of Pentalenolactone E and Pentalenolactone F-1. Retrosynthesis and π-Facial Differentiation in Palladium-Catalyzed and Dipolar [3 + 2]-Cycloaddition Reactions of Bicyclic Alkenes: Evidence for Electrostatic Control of Stereoselectivity

Autor: Bernd Rosenstock, Eva Herrmann, Gerhard Raabe, Carl Krüger, Hans-Joachim Gais, Paul Binger, Petra Wedemann, Andreas Freund, Jörg Lindner

Publikováno v: European Journal of Organic Chemistry. 1998:257-273

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::77dc48191d6b2f5b4cd8413f1c021da2
https://doi.org/10.1002/(sici)1099-0690(199802)1998:2<257::aid-ejoc257>3.0.co

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Palladium(0)- and Nickel(0)-Catalyzed [3 + 2] Co-Cyclization Reactions of Bicyclopropylidene with Alkenes

Autor: Paul Binger, Petra Wedemann, Sergei I. Kozhushkov, Armin de Meijere

Publikováno v: European Journal of Organic Chemistry. 1998:113-119

Bicyclopropylidene (1) readily undergoes a palladium(0)-catalyzed [3 + 2] co-cyclization with electron deficient alkenes (methyl acrylate, methyl trans-crotonate, methyl cinnamate and diethyl fumarate) as well as with some strained alkenes (norbornen

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::796e854b8d9b0bd3cac2d02e675d740c
https://doi.org/10.1002/(sici)1099-0690(199801)1998:1<113::aid-ejoc113>3.0.co

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Allenkomplexe des Titanocens und Zirkonocens: Darstellung und Reaktivität

Autor: Franz Langhauser, Barbara Gabor, Carl Krüger, Richard Mynott, Paul Binger, Petra Wedemann

Publikováno v: Chemische Berichte. 127:39-45

Allene Complexes of Titanocene and Zirconocene: Synthesis and Reactivity Bis(trimethylphosphane)titanocene (1) and (η2-Ethene)(trimethylphosphane)titanocene (2) react with one equivalent of allene (3a), phenylallene (3b), 1,1-dimethylallene (3c), an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2fc6e39f9711735f3afde65048d39674
https://doi.org/10.1002/cber.19941270107

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Highly Efficient Synthesis of Methylenecyclopropane

Autor: Axel Brinkmann, Paul Binger, Petra Wedemann

Publikováno v: Synthesis. :1344-1346

An efficient procedure for the preparation of methylenecyclopropane (3), a valuable starting material in organic synthesis, has been developed from methallyl chloride (1) and alkali metal [bis(trimethylsilyl)]amide [M(BTMSA) (M = Na, K), 2b,c]. The a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d14e8c88ea26933d6291f8633dbd69c6
https://doi.org/10.1055/s-2002-33122

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