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Showing 1 to 7 of 7 for “"Fulvene"”.
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Development of Palladium-Catalyzed and Iodine-Mediated Formal [4+1] Annulation Protocols. Progress toward a New Fulvene-Based Organocatalytic Platform for Carbonyl α-Functionalization
… beta-ketoesters is described. Progress toward a fulvene-based organocatalytic paradigm has been made. The diastereoselective alpha-allylation of a camphor-derived indenyl fulvene has been demonstrated. The reversible formation of fulvenes from carbonyls and electron deficient cyclopentadienes …
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Bis(pentafulven)komplexe des Titans
… partial dipolar character 6,6-disubstituted pentafulvenes are ideal candidates to stabilise group IV metal complexes in oxidation states lower than +2, a class of compounds which is still confined to rare examples. Starting from in 6-position bulky disubstituted pentafulvenes, a series of new …
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Synthesis and Structure of a Substituted Pyridazine
… of 5, 6-fused ring pyridazines beginning from fulvenes (Scheme 1) is described herein. These fused heterocycles will serve as synthetic models and building blocks for potential organic or organometallic conducting polymers.</p> <p>Our goal was to modify the route of Snyder et al. previously …
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Investigations of benzothienopyrans and related compounds
… dianion with tetraphenylcyclopentadienone gave a fulvene derivative that was resistant to cyclisation. With 2,5-diethyl-3,4-diphenylcyclopentadienone, stereospecific 1,6-addition occurred. The structure of the product was elucidated using X-ray crystallography. Reduction of the …
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Novel Metal Amido-Complexes – Syntheses, Reactivity and Asymmetric Catalysis
… a novel potassium-mediated synthesis of 6-aminofulvenes from N-aryl imines is introduced. During the hydrogenation experiments regarding the optimization of the added base, the formation of a by-product was observed, if potassium hydride was utilized as a base. The by-product could be identified …
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Design and synthesis of organic chromophores for imaging, lithography and organic electronics
… In Chapter 5, a series of substituted 6,6-dicyanofulvenes (DCFs) were synthesized starting from masked, dimeric or monomeric cyclopentadienones. DCFs lacking sufficient steric bulk around the fulvene core tended to reversibly undergo a [4+2] dimerization. In addition to being highly crystalline, …
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Novel Materials for Use in Homeland Security Research
… manganese, and rhenium complexes, beginning with fulvenes 1,2- C5H3(COHR)(COR), are reported here. The diacyl fulvenes were treated with hydrazine hydrate to ring close to pyridazines. Next, the pyridazines were converted to their respective thallium salts through treatment with thallium (I) …