Stereoselectivity, periselectivity, and regioselectivity in the cycloadditions of 8-(p-chlorophenyl)-8-azaheptafulvene with cyclopentadiene and fulvenes
摘要:
The stereoselectivity, periselectivity, and regioselectivity in the cycloaddition reactions of 8-(p-chlorophenyl)-8-azaheptafulvene with cyclopentadiene and symmetrical/unsymmetrical fulvenes is described. (C) 2003 Elsevier Ltd. All fights reserved.
Regioselective palladium-catalyzed allylation of fulvenes
作者:Björn C. Söderberg、Lucinda R. Austin、Carol A. Davis、Jan-Erik Nyström、Jan O. V»gberg
DOI:10.1016/s0040-4020(01)80737-7
日期:1994.4
allylic acetates, and allylic carbonates in the presence of catalytic amounts of bis(dibenzylideneacetone)palladium(O) and triphenyl phosphine in good to excellent yield. A high degree of regioselectivity is observed with regard to the allylic substrate, and the most hindered position was predominately substituted. Inversion of stereochemistry of the allylic carbon by migration of the anion from the metal
Exocyclic substituent effects in the unsymmetrically cycloadditions of electron-deficient heptafulvenes with electron-rich fulvenes: Stereoselectivity, periselectivity, and regioselectivity
The exocyclic substituent control of stereoselectivity, periselectivity, and regioselectivity in the unsymmetricalcycloaddition reactions of electron-deficient heptafulvenes with electron-rich fulvenes are discussed.
Gold-catalysed rearrangement of unconventional cyclopropane-tethered 1,5-enynes
作者:Rubén Vicente、Eva Tudela、Miguel A. Rodríguez、Ángel L. Suárez-Sobrino、Alfredo Ballesteros
DOI:10.1039/d2cc02869g
日期:——
The synthesis of particular cyclopropane-tethered 1,5-enynes, namely 6-alkynyl-4-alkylidenebicyclo[3.1.0]hex-2-enes, enabled the discovery of unprecedented gold-catalyzed rearrangment to indenes. A computational study of the mechanism of this profound skeleton rearrangement is also disclosed.
Reaktionen von Pentafulven-Komplexen des Titans mit Nitrilen und iso-Nitrilen — Synthese und Isomerisierungen von σ, π-Chelatkomplexen mit Cp∼N-Liganden
lagert sich aufgrund der Elektrophilie des Titanatoms unter Bildung einer Ti—N Bindung mit signifikantem N(pπ) Ti(dπ) Bindungscharakter um. Reactions of Pentafulvene Complexes of Titanium with Nitriles and iso-Nitriles — Synthesis and Isomerizations of σ, π-Chelat Complexes with Cp∼N-Ligands The reactions of fulvene complexes Cp*Tiη6—C5H4=C(R)(R')}Cl (R = H, R' = tBu (1); R = Me, R' = iPr (4)) with nitriles
Die Umsetzungen der Fulvenkomplexe Cp*Tiη6—C5H4=C(R)(R')}Cl (R = H, R' = tBu (1); R = Me, R' = iPr (4)) mit Nitrilen und iso-Nitrilen, die zu σ, π-Chelatkomplexen mit Cp∼N-Liganden fuhrten, wurden untersucht und die entstehenden Produkte charakterisiert。Wahrend bei der Umsetzung von 1 bzw。4 mit Nitrilen eine 1, 2-Monoinsertion der CN-Einheit in die Ti-C(R)(R') (Fv)-Bindung beobachtet wird, fuhrt die
Soederberg Bjoern C., Austin Lucinda R., Davis Carol A., Nystroem Jan-Eri+, Tetrahedron, 50 (1994) N 1, S 61-76
作者:Soederberg Bjoern C., Austin Lucinda R., Davis Carol A., Nystroem Jan-Eri+