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PRODID:https://murmitoyen.com/events/vanille/udem/
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UID:69dd99db87f12
DTSTAMP:20260413T213523
DTSTART:20151111T110000
SEQUENCE:0
TRANSP:OPAQUE
DTEND:20151111T123000
URL:https://murmitoyen.com/events/vanille/udem/detail/624074
LOCATION:Université de Montréal - Pavillon J.-Armand-Bombardier\, 5155\, 
 chemin de la rampe \, Montréal\, QC\, Canada\, H3T 2B2
SUMMARY:Conférence du Professeur Rory Waterman (UVM)
DESCRIPTION:Titre : Advances in α Elimination: Catalytic Organoelement Syn
 thesis.Endroit : Pavillon J.-A.-Bombardier\, salle 1035 à 11 hHôte : Pro
 fesseur Frank Schaper
\nLa conférence sera prononcée (en anglais) par le
  professeur Rory Waterman\, du Département de chimie de l'University of V
 ermont.
\nRésumé : After observation of α-arsinidene elimination from t
 riamidoamine-supported zirconium complexes and reports of α-stannylene an
 d -stibinidene elimination from group 4 metallocenes by Tilley\, an expans
 ion of the elements that participate in this rare class of deinsertion rea
 ctions has been sought. Triamidoamine supported zirconium complexes have b
 een limited in effecting α elimination for lighter elements using\, for e
 xample\, silanes or phosphines as substrates. However\, silanes with π-do
 nating substituents\, RXSiH2 (X = NMe2\, Cl\, etc)\, do react with [κ-N\,
 N\,N\,N\,C-(Me3SiNCH2CH2)2NCH2CH2NSiMe2CH2]Zr (1) to give (N3N)ZrX (N3N = 
 N(CH2CH2NSiMe3)33–) with evidence of silylene formation. Furthermore\, c
 atalytic N–Si dehydrocoupling using triamidoamine-supported zirconium co
 mplexes has provided an in situ substrate\, RXSiH2\, for α-silylene elimi
 nation. In select cases\, the silylene fragment can be intercepted by an u
 nsaturated organic substrate. Yet more success in organoelement synthesis 
 has been realized recently with the use of iron catalysts. These compounds
  appear to dehydrocouple phosphines by α-phosphinidene elimination and ca
 n engage in catalytic preparation of phospholes from primary phosphines an
 d either alkynes or dienes.
\nInformation supplémentaireAnnonce PDF de la
  conférence
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