Global ETD Search
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Showing 1 to 10 of 10 for “"Stannyl"”.
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Enantioselective lateral lithiation-substitution of o-ethyl- and o-benzyl-N-pivaloylanilines: Studies of a pathway of stereoinformation transfer
… carbon is the same regardless of whether stannyl or stannyl chlorides, alkyl halides, or aldehydes and ketones are used as the electrophile.
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Some uses of tin compounds in organic synthesis.
… of cS - and � -s tanny 1 a lcoho 1 s and 0-stannyl acid chlorides was investigated, but stereochemical information was obtained only with the reaction of a 0-stannyl aldehyde to give a cyclopentanol, which proceeded largely with retention of configuration at the tin-bearing carbon, unlike …
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Synthese und Charakterisierung von mono- und 1,1´-di-substituierten Ferrocenen sowie [3]- und [4]Ferrocenophanen und ihre 57Fe-NMR-spektroskopische Untersuchung
… und 9-BBN konnten die 1-silyl-1´-boryl - und 1-stannyl-1´-silyl-substituierten Ferrocene erhalten werden. IV. Intramolekularer Ringschluss bei 1,1´-disubstituierten Ferrocenen Mit Hilfe der unter III beschriebenen Produkte konnten erstmals [3]Ferrocenophane mit drei ver-schiedenen …
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Novel palladium-catalyzed synthesis of 3-substituted indoles and its application toward the total synthesis of indolactam V
… were prepared via Stille coupling of 2-tributyl stannyl-2-propenoic acid ethyl ester with substituted 2-bromo-l-nitrobenzenes. Alternatively, sequential vicarious nucleophilic substitution of substituted nitrobenzenes and Knoevenagel condensation with formaldehyde was used to prepare …
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Studies in ring D fragmentation of estrone
… The fragmentation approaches involved conjugate stannylation and silylation of 3-methoxyestra-1,3,5,(10), 15-tetraen-17 -one to give the 15β-trimethylstannyl and 15β-trimethylsilyl 17 -ketones respectively. The stannyl ketone was converted to the …
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Synthese, Charakterisierung und Reaktivität von Platin(II)-Komplexen mit Cycloheptatrienylphosphan-Liganden
… vermutlich ein Platin(II)-Komplex (46) mit vier Stannyl- und einem Phosphan-Liganden bildet.
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The Use of Functionalized Zirconocenes as Precursors to Silica-Supported Zirconocene Olefin Polymerization Catalysts
… (C) efficiently. The Sn-X bonds of the stannylated metallocenes were however relatively unreactive toward water and were excluded as candidates precursors for supported metallocene catalysts. X-ray crystal structures of (h5-ClMe2Sn-C5H4)CpZrCl2·½toluene, (h5-Br2MeSn-C5H4)CpZrBr2·THF, B, …
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1. Reinvestigation of a catalytic, enantioselective alkene dibromination and chlorohydroxylation, 2. Double cross-coupling reactions of siloxaborolates, 3. The enantioselective synthesis of 3-substituted morpholines using computer-guided catalyst design
In Chapter 1, attempts to reproduce eight, putative, enantioselective dibromination and chlorohydroxylation reactions from oft-cited literature studies are described. The reactions were performed with full fidelity to the original report wherever possible. Analysis of the enantiomeric composition …