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DTSTAMP:20260413T085506
DTSTART:20160413T110000
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URL:https://murmitoyen.com/events/vanille/udem/detail/671473
LOCATION:Université de Montréal - Pavillon Roger-Gaudry\, 2900\, chemin d
 e la Tour\, Montréal\, QC\, Canada\, H3T 1J6
SUMMARY:Conférence CCVC avec le Professeur Paul Chirik (Princeton)
DESCRIPTION:Titre : Modern Alchemy - Base Metal Catalysis for Organic Synth
 esis: The Interplay of Applications and Electronic Structure.Endroit : Pav
 illon Roger-Gaudry\, salle G-615 à 11 h.Hôte : Hélène Lebel.
\nLa conf
 érence sera prononcée (en anglais) par le professeur Paul Chirik du Dép
 artement de chimie de la Princeton University. Elle est commanditée par 
 le Centre en chimie verte et catalyse (CCVC).
\nRésumé : Transition meta
 l catalysis has revolutionized organic synthesis by enabling new transform
 ations with unprecedented selectivity. Our laboratory has been actively en
 gaged in developing catalysts based on earth abundant elements rather than
  more traditionally deployed precious metals. The inspirations for this ch
 emistry extend beyond catalyst cost\; ultimately we aim to discover new re
 activity that exploits the unique electronic structures of first row trans
 ition metals. My lecture will focus on two complementary approaches to thi
 s challenge. The first explores redox-active ligands\, those that engage i
 n reversible radical chemistry with the metal center\, while the second em
 ploys a more traditional strong field ligand approach to engender more ele
 ctron rich metal complexes. These two extremes define a continuum of react
 ivity ranging from new iron catalysts for commercial silicone production (
 Science 2012\, 335\, 567) to the asymmetric hydrogenation of alkenes (Scie
 nce 2013\, 342\, 1054)\, C-H functionalization (J. Am. Chem. Soc. 2014\, 1
 36\, 4133) and radiolabeling (Nature 2016\, in press)\, important transfor
 mations with pharmaceutical relevance. More recently we have been focused 
 on the discovery of new catalytic reactions for the valorization of simple
  alkenes – those that are now overabundant due to the development of vas
 t natural gas reserves. An iron-catalyzed method for the diastereo- and re
 gioselective intermolecular [2+2] cycloaddition of commodity alkenes has b
 een discovered (Science 2015\, 349\, 960). Through continued ligand evolut
 ion and understanding of electronic structure\, we have discovered base me
 tal catalysts that promote chemistry unknown with established precious met
 al variants. The mechanisms of the various catalytic transformations\, the
  importance of electronic structure controlled through ligand manipulation
  and strategies for imparting air stability will be a highlighted througho
 ut.
\nInformation supplémentaireAnnonce PDF de la conférence
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