1
|
Cormier S, Fogg DE. Probing Catalyst Degradation in Metathesis of Internal Olefins: Expanding Access to Amine-Tagged ROMP Polymers. ACS Catal 2023; 13:11834-11840. [PMID: 37671179 PMCID: PMC10476157 DOI: 10.1021/acscatal.3c02729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 08/15/2023] [Indexed: 09/07/2023]
Abstract
Ruthenium-promoted ring-opening metathesis polymerization (ROMP) offers potentially powerful routes to amine-functionalized polymers with antimicrobial, adhesive, and self-healing properties. However, amines readily degrade the methylidene and unsubstituted ruthenacyclobutane intermediates formed in metathesis of terminal olefins. Examined herein is the relevance of these decomposition pathways to ROMP (i.e., metathesis of internal olefins) by the third-generation Grubbs catalyst. Primary alkylamines rapidly quench polymerization via fast adduct formation, followed by nucleophilic abstraction of the propagating alkylidene. Bulkier, Brønsted-basic amines are less aggressive: attack competes only for slow polymerization or strong bases (e.g., DBU). Added HCl limits degradation, as demonstrated by the successful ROMP of an otherwise intractable methylamine monomer.
Collapse
Affiliation(s)
- Samantha
K. Cormier
- Center
for Catalysis Research & Innovation, and Department of Chemistry
and Biomolecular Sciences, University of
Ottawa, Ottawa, Ontario, Canada K1N 6N5
| | - Deryn E. Fogg
- Center
for Catalysis Research & Innovation, and Department of Chemistry
and Biomolecular Sciences, University of
Ottawa, Ottawa, Ontario, Canada K1N 6N5
- Department
of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| |
Collapse
|
2
|
Ou X, Occhipinti G, Boisvert EJY, Jensen VR, Fogg DE. Mesomeric Acceleration Counters Slow Initiation of Ruthenium–CAAC Catalysts for Olefin Metathesis (CAAC = Cyclic (Alkyl)(Amino) Carbene). ACS Catal 2023; 13:5315-5325. [PMID: 37123599 PMCID: PMC10127214 DOI: 10.1021/acscatal.2c03828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Revised: 03/20/2023] [Indexed: 04/08/2023]
Abstract
Ruthenium catalysts bearing cyclic (alkyl)(amino)carbene (CAAC) ligands can attain very high productivities in olefin metathesis, owing to their resistance to unimolecular decomposition. Because the propagating methylidene species RuCl2(CAAC)(=CH2) is extremely susceptible to bimolecular decomposition, however, turnover numbers in the metathesis of terminal olefins are highly sensitive to catalyst concentration, and hence loadings. Understanding how, why, and how rapidly the CAAC complexes partition between the precatalyst and the active species is thus critical. Examined in a dual experimental-computational study are the rates and basis of initiation for phosphine-free catalysts containing the leading CAAC ligand C1 Ph , in which a CMePh group α to the carbene carbon helps retard degradation. The Hoveyda-class complex HC1 Ph (RuCl2(L)(=CHAr), where L = C1 Ph , Ar = C6H3-2-O i Pr-5-R; R = H) is compared with its nitro-Grela analogue (nG-C1 Ph ; R = NO2) and the classic Hoveyda catalyst HII (L = H2IMes; R = H). t-Butyl vinyl ether (tBuVE) was employed as substrate, to probe the reactivity of these catalysts toward olefins of realistic bulk. Initiation is ca. 100× slower for HC1 Ph than HII in C6D6, or 44× slower in CDCl3. The rate-limiting step for the CAAC catalyst is cycloaddition; for HII, it is tBuVE binding. Initiation is 10-13× faster for nG-C1 Ph than HC1 Ph in either solvent. DFT analysis reveals that this rate acceleration originates in an overlooked role of the nitro group. Rather than weakening the Ru-ether bond, as widely presumed, the NO2 group accelerates the ensuing, rate-limiting cycloaddition step. Faster reaction is caused by long-range mesomeric effects that modulate key bond orders and Ru-ligand distances, and thereby reduce the trans effect between the carbene and the trans-bound alkene in the transition state for cycloaddition. Mesomeric acceleration may plausibly be introduced via any of the ligands present, and hence offers a powerful, tunable control element for catalyst design.
Collapse
Affiliation(s)
- Xinrui Ou
- Center for Catalysis Research & Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Giovanni Occhipinti
- Department of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| | - Eliza-Jayne Y. Boisvert
- Center for Catalysis Research & Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Vidar R. Jensen
- Department of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| | - Deryn E. Fogg
- Center for Catalysis Research & Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
- Department of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| |
Collapse
|
3
|
Boisvert EJY, Max HC, Fogg DE. Rapid Aerial Oxidation of Ruthenium-Dithiocatecholate Catalysts: A Challenge to Stereoretentive Olefin Metathesis. ACS Catal 2023. [DOI: 10.1021/acscatal.2c06168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Affiliation(s)
- Eliza-Jayne Y. Boisvert
- Center for Catalysis Research & Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, ON K1N 6N5, Canada
| | - Harrison C. Max
- Center for Catalysis Research & Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, ON K1N 6N5, Canada
| | - Deryn E. Fogg
- Center for Catalysis Research & Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, ON K1N 6N5, Canada
- Department of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| |
Collapse
|
4
|
Blanco C, Fogg DE. Water-Accelerated Decomposition of Olefin Metathesis Catalysts. ACS Catal 2023; 13:1097-1102. [PMID: 36714054 PMCID: PMC9872090 DOI: 10.1021/acscatal.2c05573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 12/22/2022] [Indexed: 01/04/2023]
Abstract
Water is ubiquitous in olefin metathesis, at levels ranging from contaminant to cosolvent. It is also non-benign. Water-promoted catalyst decomposition competes with metathesis, even for "robust" ruthenium catalysts. Metathesis is hence typically noncatalytic for demanding reactions in water-rich environments (e.g., chemical biology), a challenge as the Ru decomposition products promote unwanted reactions such as DNA degradation. To date, only the first step of the decomposition cascade is understood: catalyst aquation. Here we demonstrate that the aqua species dramatically accelerate both β-elimination of the metallacyclobutane intermediate and bimolecular decomposition of four-coordinate [RuCl(H2O)n(L)(=CHR)]Cl. Decomposition can be inhibited by blocking aquation and β-elimination.
Collapse
Affiliation(s)
- Christian
O. Blanco
- Center
for Catalysis Research & Innovation and Department of Chemistry
and Biomolecular Sciences, University of
Ottawa, Ottawa, Ontario, Canada K1N 6N5
| | - Deryn E. Fogg
- Center
for Catalysis Research & Innovation and Department of Chemistry
and Biomolecular Sciences, University of
Ottawa, Ottawa, Ontario, Canada K1N 6N5,Department
of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway,,
| |
Collapse
|
5
|
Occhipinti G, Nascimento DL, Foscato M, Fogg DE, Jensen VR. The Janus face of high trans-effect carbenes in olefin metathesis: gateway to both productivity and decomposition. Chem Sci 2022; 13:5107-5117. [PMID: 35655574 PMCID: PMC9093171 DOI: 10.1039/d2sc00855f] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 03/19/2022] [Indexed: 11/25/2022] Open
Abstract
Ruthenium–cyclic(alkyl)(amino)carbene (CAAC) catalysts, used at ppm levels, can enable dramatically higher productivities in olefin metathesis than their N-heterocyclic carbene (NHC) predecessors. A key reason is the reduced susceptibility of the metallacyclobutane (MCB) intermediate to decomposition via β-H elimination. The factors responsible for promoting or inhibiting β-H elimination are explored via density functional theory (DFT) calculations, in metathesis of ethylene or styrene (a representative 1-olefin) by Ru–CAAC and Ru–NHC catalysts. Natural bond orbital analysis of the frontier orbitals confirms the greater strength of the orbital interactions for the CAAC species, and the consequent increase in the carbene trans influence and trans effect. The higher trans effect of the CAAC ligands inhibits β-H elimination by destabilizing the transition state (TS) for decomposition, in which an agostic MCB Cβ–H bond is positioned trans to the carbene. Unproductive cycling with ethylene is also curbed, because ethylene is trans to the carbene ligand in the square pyramidal TS for ethylene metathesis. In contrast, metathesis of styrene proceeds via a ‘late’ TS with approximately trigonal bipyramidal geometry, in which carbene trans effects are reduced. Importantly, however, the positive impact of a strong trans-effect ligand in limiting β-H elimination is offset by its potent accelerating effect on bimolecular coupling, a major competing means of catalyst decomposition. These two decomposition pathways, known for decades to limit productivity in olefin metathesis, are revealed as distinct, antinomic, responses to a single underlying phenomenon. Reconciling these opposing effects emerges as a clear priority for design of robust, high-performing catalysts. In ruthenium catalysts for olefin metathesis, carbene ligands of high trans influence/effect suppress decomposition via β-H elimination, but increase susceptibility to bimolecular decomposition.![]()
Collapse
Affiliation(s)
- Giovanni Occhipinti
- Department of Chemistry, University of Bergen Allégaten 41 N-5007 Bergen Norway
| | - Daniel L Nascimento
- Center for Catalysis Research & Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa Ottawa Canada K1N 6N5
| | - Marco Foscato
- Department of Chemistry, University of Bergen Allégaten 41 N-5007 Bergen Norway
| | - Deryn E Fogg
- Department of Chemistry, University of Bergen Allégaten 41 N-5007 Bergen Norway .,Center for Catalysis Research & Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa Ottawa Canada K1N 6N5
| | - Vidar R Jensen
- Department of Chemistry, University of Bergen Allégaten 41 N-5007 Bergen Norway
| |
Collapse
|
6
|
Nascimento D, Foscato M, Occhipinti G, Jensen VR, Fogg DE. Bimolecular Coupling in Olefin Metathesis: Correlating Structure and Decomposition for Leading and Emerging Ruthenium-Carbene Catalysts. J Am Chem Soc 2021; 143:11072-11079. [PMID: 34270895 PMCID: PMC8397316 DOI: 10.1021/jacs.1c04424] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Indexed: 12/19/2022]
Abstract
Bimolecular catalyst decomposition is a fundamental, long-standing challenge in olefin metathesis. Emerging ruthenium-cyclic(alkyl)(amino)carbene (CAAC) catalysts, which enable breakthrough advances in productivity and general robustness, are now known to be extraordinarily susceptible to this pathway. The details of the process, however, have hitherto been obscure. The present study provides the first detailed mechanistic insights into the steric and electronic factors that govern bimolecular decomposition. Described is a combined experimental and theoretical study that probes decomposition of the key active species, RuCl2(L)(py)(═CH2) 1 (in which L is the N-heterocyclic carbene (NHC) H2IMes, or a CAAC ligand: the latter vary in the NAr group (NMes, N-2,6-Et2C6H3, or N-2-Me,6-iPrC6H3) and the substituents on the quaternary site flanking the carbene carbon (i.e., CMe2 or CMePh)). The transiently stabilized pyridine adducts 1 were isolated by cryogenic synthesis of the metallacyclobutanes, addition of pyridine, and precipitation. All are shown to decompose via second-order kinetics at -10 °C. The most vulnerable CAAC species, however, decompose more than 1000-fold faster than the H2IMes analogue. Computational studies reveal that the key factor underlying accelerated decomposition of the CAAC derivatives is their stronger trans influence, which weakens the Ru-py bond and increases the transient concentration of the 14-electron methylidene species, RuCl2(L)(═CH2) 2. Fast catalyst initiation, a major design goal in olefin metathesis, thus has the negative consequence of accelerating decomposition. Inhibiting bimolecular decomposition offers major opportunities to transform catalyst productivity and utility, and to realize the outstanding promise of olefin metathesis.
Collapse
Affiliation(s)
- Daniel
L. Nascimento
- Center
for Catalysis Research & Innovation, and Department of Chemistry
and Biomolecular Sciences, University of
Ottawa, Ottawa, Canada K1N 6N5
| | - Marco Foscato
- Department
of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| | - Giovanni Occhipinti
- Department
of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| | - Vidar R. Jensen
- Department
of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| | - Deryn E. Fogg
- Center
for Catalysis Research & Innovation, and Department of Chemistry
and Biomolecular Sciences, University of
Ottawa, Ottawa, Canada K1N 6N5
- Department
of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| |
Collapse
|
7
|
Blanco C, Nascimento DL, Fogg DE. Routes to High-Performing Ruthenium-Iodide Catalysts for Olefin Metathesis: Ligand Lability Is Key to Efficient Halide Exchange. Organometallics 2021; 40:1811-1816. [PMID: 34295013 PMCID: PMC8289337 DOI: 10.1021/acs.organomet.1c00253] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Indexed: 12/14/2022]
Abstract
Clean, high-yielding routes are described to ruthenium-diiodide catalysts that were recently shown to enable high productivity in olefin metathesis. For the second-generation Grubbs and Hoveyda catalysts (GII: RuCl2(H2IMes)(PCy3)(=CHPh); HII: RuCl2(H2IMes)(=CHAr), Ar = C6H4-2-O i Pr), slow salt metathesis is shown to arise from the low lability of the ancillary PCy3 or ether ligands, which retards access to the four-coordinate intermediate required for efficient halide exchange. To exploit the lability of the first-generation catalysts, the diiodide complex RuI2(PCy3)(=CHAr) HI-I 2 was prepared by treating "Grubbs I" (RuCl2(PCy3)2(=CHPh), GI) with NaI, H2C=CHAr (1a), and a phosphine-scavenging Merrifield iodide (MF-I) resin. Subsequent installation of H2IMes or cyclic (alkyl)(amino)carbene (CAAC) ligands afforded the second-generation iodide catalysts in good to excellent yields. Given the incompatibility of the nitro group with a free carbene, the iodo-Grela catalyst RuI2(H2IMes)(=CHAr') (nG-I 2 : Ar' = C6H3-2-O i Pr-4-NO2) was instead accessed by sequential salt metathesis of GI with NaI, installation of H2IMes, and finally cross-metathesis with the nitrostyrenyl ether H2C=CHAr' (1b), with MF-I as the phosphine scavenger. The bulky iodide ligands improve the selectivity for macrocyclization in ring-closing metathesis.
Collapse
Affiliation(s)
- Christian
O. Blanco
- Center
for Catalysis Research & Innovation and Department of Chemistry
and Biomolecular Sciences, University of
Ottawa, Ottawa, ON, Canada K1N 6N5
| | - Daniel L. Nascimento
- Center
for Catalysis Research & Innovation and Department of Chemistry
and Biomolecular Sciences, University of
Ottawa, Ottawa, ON, Canada K1N 6N5
| | - Deryn E. Fogg
- Center
for Catalysis Research & Innovation and Department of Chemistry
and Biomolecular Sciences, University of
Ottawa, Ottawa, ON, Canada K1N 6N5
- Department
of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| |
Collapse
|
8
|
Blanco CO, Sims J, Nascimento DL, Goudreault AY, Steinmann SN, Michel C, Fogg DE. The Impact of Water on Ru-Catalyzed Olefin Metathesis: Potent Deactivating Effects Even at Low Water Concentrations. ACS Catal 2021; 11:893-899. [PMID: 33614193 PMCID: PMC7886052 DOI: 10.1021/acscatal.0c04279] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 12/29/2020] [Indexed: 12/14/2022]
Abstract
Ruthenium catalysts for olefin metathesis are widely viewed as water-tolerant. Evidence is presented, however, that even low concentrations of water cause catalyst decomposition, severely degrading yields. Of 11 catalysts studied, fast-initiating examples (e.g., the Grela catalyst RuCl2(H2IMes)(=CHC6H4-2-O i Pr-5-NO2) were most affected. Maximum water tolerance was exhibited by slowly initiating iodide and cyclic (alkyl)(amino)carbene (CAAC) derivatives. Computational investigations indicated that hydrogen bonding of water to substrate can also play a role, by retarding cyclization relative to decomposition. These results have important implications for olefin metathesis in organic media, where water is a ubiquitous contaminant, and for aqueous metathesis, which currently requires superstoichiometric "catalyst" for demanding reactions.
Collapse
Affiliation(s)
- Christian O. Blanco
- Center for Catalysis Research & Innovation, and
Department of Chemistry and Biomolecular Sciences, University of
Ottawa, Ottawa, Ontario K1N 6N57, Canada
| | - Joshua Sims
- Univ. Lyon, ENS de Lyon,
CNRS UMR 5182, Université Claude Bernard Lyon 1, Laboratorie de Chimie, F-69342
Lyon, France
| | - Daniel L. Nascimento
- Center for Catalysis Research & Innovation, and
Department of Chemistry and Biomolecular Sciences, University of
Ottawa, Ottawa, Ontario K1N 6N57, Canada
| | - Alexandre Y. Goudreault
- Center for Catalysis Research & Innovation, and
Department of Chemistry and Biomolecular Sciences, University of
Ottawa, Ottawa, Ontario K1N 6N57, Canada
| | - Stephan N. Steinmann
- Univ. Lyon, ENS de Lyon,
CNRS UMR 5182, Université Claude Bernard Lyon 1, Laboratorie de Chimie, F-69342
Lyon, France
| | - Carine Michel
- Univ. Lyon, ENS de Lyon,
CNRS UMR 5182, Université Claude Bernard Lyon 1, Laboratorie de Chimie, F-69342
Lyon, France
| | - Deryn E. Fogg
- Center for Catalysis Research & Innovation, and
Department of Chemistry and Biomolecular Sciences, University of
Ottawa, Ottawa, Ontario K1N 6N57, Canada
- Department of Chemistry, University of
Bergen, Allégaten 41, N-5007 Bergen,
Norway
| |
Collapse
|
9
|
Nascimento DL, Reim I, Foscato M, Jensen VR, Fogg DE. Challenging Metathesis Catalysts with Nucleophiles and Brønsted Base: Examining the Stability of State-of-the-Art Ruthenium Carbene Catalysts to Attack by Amines. ACS Catal 2020; 10:11623-11633. [PMID: 33123412 PMCID: PMC7587145 DOI: 10.1021/acscatal.0c02760] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 08/29/2020] [Indexed: 11/29/2022]
Abstract
Critical to advancing the uptake of olefin metathesis in leading contexts, including pharmaceutical manufacturing, is identification of highly active catalysts that resist decomposition. Amines constitute an aggressive challenge to ruthenium metathesis catalysts. Examined here is the impact of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU), morpholine, n-butylamine, and triethylamine on Ru metathesis catalysts that represent the current state of the art, including cyclic alkyl amino carbene (CAAC) and N-heterocyclic carbene (NHC) complexes. Accordingly, the amine-tolerance of the nitro-Grela catalyst RuCl2(H2IMes)(=CHAr) (nG; Ar = C6H4-2-O i Pr-5-NO2) is compared with that of its CAAC analogues nGC1 and nGC2, and the Hoveyda-class catalyst RuCl2(C2)(=CHAr') HC2 (Ar' = C6H4-2-O i Pr). In C1, the carbene carbon is flanked by an N-2,6-Et2C6H3 group and a CMePh quaternary carbon; in C2, by an N-2- i Pr-6-MeC6H3 group and a CMe2 quaternary carbon. The impact of 1 equiv amine per Ru on turnover numbers (TONs) in ring-closing metathesis of diethyl diallylmalonate was assessed at 9 ppm Ru, at RT and 70 °C. The deleterious impact of amines followed the trend NEt3 ∼ NH2 n Bu ≪ DBU ∼ morpholine. Morpholine is shown to decompose nGC1 by nucleophilic abstraction of the methylidene ligand; DBU, by proton abstraction from the metallacyclobutane. Decomposition was minimized at 70 °C, at which nGC1 enabled TONs of ca. 60 000 even in the presence of morpholine or DBU, vs ca. 80 000 in the absence of base. Unexpectedly, H2IMes catalyst nG delivered 70-90% of the performance of nGC1 at high temperatures, and underwent decomposition by Brønsted base at a similar rate. Density functional theory (DFT) analysis shows that this similarity is due to comparable net electron donation by the H2IMes and C1 ligands. Catalysts bearing the smaller C2 ligand were comparatively insensitive to amines, owing to rapid, preferential bimolecular decomposition.
Collapse
Affiliation(s)
- Daniel L. Nascimento
- Center for Catalysis Research & Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Canada K1N 6N5
| | - Immanuel Reim
- Department of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| | - Marco Foscato
- Department of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| | - Vidar R. Jensen
- Department of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| | - Deryn E. Fogg
- Center for Catalysis Research & Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Canada K1N 6N5
- Department of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| |
Collapse
|
10
|
Jongkind LJ, Rahimi M, Poole D, Ton SJ, Fogg DE, Reek JNH. Protection of Ruthenium Olefin Metathesis Catalysts by Encapsulation in a Self‐assembled Resorcinarene Capsule. ChemCatChem 2020. [DOI: 10.1002/cctc.202000111] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Lukas J. Jongkind
- Homogeneous, Supramolecular and Bio-Inspired Catalysis Van't Hoff Institute for Molecular Sciences University of Amsterdam Science Park 904 1098 XH Amsterdam (The Netherlands
| | - Maryam Rahimi
- Homogeneous, Supramolecular and Bio-Inspired Catalysis Van't Hoff Institute for Molecular Sciences University of Amsterdam Science Park 904 1098 XH Amsterdam (The Netherlands
- Centre for Catalysis Research & Innovation and Department of Chemistry and Biomolecular Sciences University of Ottawa 10 Marie Curie Ottawa ON K1 N 6 N5 Canada
| | - David Poole
- Homogeneous, Supramolecular and Bio-Inspired Catalysis Van't Hoff Institute for Molecular Sciences University of Amsterdam Science Park 904 1098 XH Amsterdam (The Netherlands
| | - Stephanie J. Ton
- Centre for Catalysis Research & Innovation and Department of Chemistry and Biomolecular Sciences University of Ottawa 10 Marie Curie Ottawa ON K1 N 6 N5 Canada
| | - Deryn E. Fogg
- Centre for Catalysis Research & Innovation and Department of Chemistry and Biomolecular Sciences University of Ottawa 10 Marie Curie Ottawa ON K1 N 6 N5 Canada
| | - Joost N. H. Reek
- Homogeneous, Supramolecular and Bio-Inspired Catalysis Van't Hoff Institute for Molecular Sciences University of Amsterdam Science Park 904 1098 XH Amsterdam (The Netherlands
| |
Collapse
|
11
|
Goudreault AY, Walden DM, Nascimento DL, Botti AG, Steinmann SN, Michel C, Fogg DE. Hydroxide-Induced Degradation of Olefin Metathesis Catalysts: A Challenge for Metathesis in Alkaline Media. ACS Catal 2020. [DOI: 10.1021/acscatal.9b05163] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Alexandre Y. Goudreault
- Center for Catalysis Research and Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Daniel M. Walden
- Univ. Lyon, ENS de Lyon, CNRS UMR 5182, Université Claude Bernard Lyon 1, Laboratorie de Chimie, F-69342 Lyon, France
| | - Daniel L. Nascimento
- Center for Catalysis Research and Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Adrian G. Botti
- Center for Catalysis Research and Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Stephan N. Steinmann
- Univ. Lyon, ENS de Lyon, CNRS UMR 5182, Université Claude Bernard Lyon 1, Laboratorie de Chimie, F-69342 Lyon, France
| | - Carine Michel
- Univ. Lyon, ENS de Lyon, CNRS UMR 5182, Université Claude Bernard Lyon 1, Laboratorie de Chimie, F-69342 Lyon, France
| | - Deryn E. Fogg
- Center for Catalysis Research and Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| |
Collapse
|
12
|
Nascimento DL, Fogg DE. Origin of the Breakthrough Productivity of Ruthenium–Cyclic Alkyl Amino Carbene Catalysts in Olefin Metathesis. J Am Chem Soc 2019; 141:19236-19240. [DOI: 10.1021/jacs.9b10750] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Daniel L. Nascimento
- Center for Catalysis Research & Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, K1N 6N5 Ontario, Canada
| | - Deryn E. Fogg
- Center for Catalysis Research & Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, K1N 6N5 Ontario, Canada
| |
Collapse
|
13
|
Ton SJ, Fogg DE. The Impact of Oxygen on Leading and Emerging Ru-Carbene Catalysts for Olefin Metathesis: An Unanticipated Correlation Between Robustness and Metathesis Activity. ACS Catal 2019. [DOI: 10.1021/acscatal.9b03285] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Stephanie J. Ton
- Center for Catalysis Research and Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Deryn E. Fogg
- Center for Catalysis Research and Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| |
Collapse
|
14
|
Affiliation(s)
- Petra E. de Jongh
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials ScienceUtrecht University Universiteitweg 99 3584 Utrecht The Netherlands
| | - Deryn E. Fogg
- Center for Catalysis Research & Innovation, Department of Chemistry and Biomolecular SciencesUniversity of Ottawa 10 Marie Curie Ottawa ON K1N 6N5 Canada
| | - Li‐Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and ChemistryChinese Academy of Sciences Beijing 100190 PR China
| | | |
Collapse
|
15
|
de Jongh PE, Fogg DE, Wu L, González‐Gallardo S. Front Cover: Meet the
Women of Catalysis
(ChemCatChem 16/2019). ChemCatChem 2019. [DOI: 10.1002/cctc.201901325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Petra E. de Jongh
- Inorganic Chemistry and Catalysis, Debye Institute for Nanomaterials ScienceUtrecht University Universiteitweg 99 3584 Utrecht The Netherlands
| | - Deryn E. Fogg
- Center for Catalysis Research & Innovation, Department of Chemistry and Biomolecular SciencesUniversity of Ottawa 10 Marie Curie Ottawa ON K1N 6N5 Canada
| | - Li‐Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and ChemistryChinese Academy of Sciences Beijing 100190 PR China
| | | |
Collapse
|
16
|
Nascimento DL, Gawin A, Gawin R, Guńka PA, Zachara J, Skowerski K, Fogg DE. Integrating Activity with Accessibility in Olefin Metathesis: An Unprecedentedly Reactive Ruthenium-Indenylidene Catalyst. J Am Chem Soc 2019; 141:10626-10631. [PMID: 31248254 DOI: 10.1021/jacs.9b05362] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Access to leading olefin metathesis catalysts, including the Grubbs, Hoveyda, and Grela catalysts, ultimately rests on the nonscaleable transfer of a benzylidene ligand from an unstable, impure aryldiazomethane. The indenylidene ligand can be reliably installed, but to date yields much less reactive catalysts. A fast-initiating, dimeric indenylidene complex (Ru-1) is reported, which reconciles high activity with scaleable synthesis. Each Ru center in Ru-1 is stabilized by a state-of-the-art cyclic alkyl amino carbene (CAAC, C1) and a bridging chloride donor: the lability of the latter elevates the reactivity of Ru-1 to a level previously attainable only with benzylidene derivatives. Evaluation of initiation rate constants reveals that Ru-1 initiates >250× faster than indenylidene catalyst M2 (RuCl2(H2IMes)(PCy3)(Ind)), and 65× faster than UC (RuCl2(C1)2(Ind)). The slow initiation previously regarded as characteristic of indenylidene catalysts is hence due to low ligand lability, not inherently slow cycloaddition at the Ru=CRR' site. In macrocyclization and "ethenolysis" of methyl oleate (i.e., transformation into α-olefins via cross-metathesis with C2H4), Ru-1 is comparable or superior to the corresponding, breakthrough CAAC-benzylidene catalyst. In ethenolysis, Ru-1 is 5× more robust to standard-grade (99.9%) C2H4 than the top-performing catalyst, probably reflecting steric protection at the quaternary CAAC carbon.
Collapse
Affiliation(s)
- Daniel L Nascimento
- Center for Catalysis Research and Innovation, and Department of Chemistry and Biomolecular Sciences , University of Ottawa , Ottawa , Ontario K1N 6N5 , Canada
| | - Anna Gawin
- Apeiron Synthesis , Duńska 9 , 54-427 Wrocław , Poland
| | - Rafał Gawin
- Apeiron Synthesis , Duńska 9 , 54-427 Wrocław , Poland
| | - Piotr A Guńka
- Faculty of Chemistry , Warsaw University of Technology , Noakowskiego 3 , 00-664 Warsaw , Poland
| | - Janusz Zachara
- Faculty of Chemistry , Warsaw University of Technology , Noakowskiego 3 , 00-664 Warsaw , Poland
| | | | - Deryn E Fogg
- Center for Catalysis Research and Innovation, and Department of Chemistry and Biomolecular Sciences , University of Ottawa , Ottawa , Ontario K1N 6N5 , Canada
| |
Collapse
|
17
|
Affiliation(s)
- Louis-Charles Campeau
- Department of Process Research and Development, Merck Research Laboratories, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Deryn E. Fogg
- Centre for Catalysis Research & Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, K1N 6N5 Ontario, Canada
| |
Collapse
|
18
|
Day CS, Fogg DE. High-Yield Synthesis of a Long-Sought, Labile Ru-NHC Complex and Its Application to the Concise Synthesis of Second-Generation Olefin Metathesis Catalysts. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00745] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Craig S. Day
- Center for Catalysis Research and Innovation and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
| | - Deryn E. Fogg
- Center for Catalysis Research and Innovation and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
| |
Collapse
|
19
|
Rufh SA, Goudreault AY, Foscato M, Jensen VR, Fogg DE. Rapid Decomposition of Olefin Metathesis Catalysts by a Truncated N-Heterocyclic Carbene: Efficient Catalyst Quenching and N-Heterocyclic Carbene Vinylation. ACS Catal 2018. [DOI: 10.1021/acscatal.8b03123] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stephanie A. Rufh
- Center for Catalysis Research and Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Canada K1N 6N5
| | - Alexandre Y. Goudreault
- Center for Catalysis Research and Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Canada K1N 6N5
| | - Marco Foscato
- Department of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| | - Vidar R. Jensen
- Department of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| | - Deryn E. Fogg
- Center for Catalysis Research and Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Canada K1N 6N5
- Department of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| |
Collapse
|
20
|
Bailey GA, Foscato M, Higman CS, Day CS, Jensen VR, Fogg DE. Bimolecular Coupling as a Vector for Decomposition of Fast-Initiating Olefin Metathesis Catalysts. J Am Chem Soc 2018; 140:6931-6944. [PMID: 29652496 DOI: 10.1021/jacs.8b02709] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The correlation between rapid initiation and rapid decomposition in olefin metathesis is probed for a series of fast-initiating, phosphine-free Ru catalysts: the Hoveyda catalyst HII, RuCl2(L)(═CHC6H4- o-O iPr); the Grela catalyst nG (a derivative of HII with a nitro group para to O iPr); the Piers catalyst PII, [RuCl2(L)(═CHPCy3)]OTf; the third-generation Grubbs catalyst GIII, RuCl2(L)(py)2(═CHPh); and dianiline catalyst DA, RuCl2(L)( o-dianiline)(═CHPh), in all of which L = H2IMes = N,N'-bis(mesityl)imidazolin-2-ylidene. Prior studies of ethylene metathesis have established that various Ru metathesis catalysts can decompose by β-elimination of propene from the metallacyclobutane intermediate RuCl2(H2IMes)(κ2-C3H6), Ru-2. The present work demonstrates that in metathesis of terminal olefins, β-elimination yields only ca. 25-40% propenes for HII, nG, PII, or DA, and none for GIII. The discrepancy is attributed to competing decomposition via bimolecular coupling of methylidene intermediate RuCl2(H2IMes)(═CH2), Ru-1. Direct evidence for methylidene coupling is presented, via the controlled decomposition of transiently stabilized adducts of Ru-1, RuCl2(H2IMes)Ln(═CH2) (Ln = py n'; n' = 1, 2, or o-dianiline). These adducts were synthesized by treating in situ-generated metallacyclobutane Ru-2 with pyridine or o-dianiline, and were isolated by precipitating at low temperature (-116 or -78 °C, respectively). On warming, both undergo methylidene coupling, liberating ethylene and forming RuCl2(H2IMes)Ln. A mechanism is proposed based on kinetic studies and molecular-level computational analysis. Bimolecular coupling emerges as an important contributor to the instability of Ru-1, and a potentially major pathway for decomposition of fast-initiating, phosphine-free metathesis catalysts.
Collapse
Affiliation(s)
- Gwendolyn A Bailey
- Center for Catalysis Research and Innovation, and Department of Chemistry and Biomolecular Sciences , University of Ottawa , Ottawa , ON , Canada K1N 6N5
| | - Marco Foscato
- Department of Chemistry , University of Bergen , Allégaten 41 , N-5007 Bergen , Norway
| | - Carolyn S Higman
- Center for Catalysis Research and Innovation, and Department of Chemistry and Biomolecular Sciences , University of Ottawa , Ottawa , ON , Canada K1N 6N5
| | - Craig S Day
- Center for Catalysis Research and Innovation, and Department of Chemistry and Biomolecular Sciences , University of Ottawa , Ottawa , ON , Canada K1N 6N5
| | - Vidar R Jensen
- Department of Chemistry , University of Bergen , Allégaten 41 , N-5007 Bergen , Norway
| | - Deryn E Fogg
- Center for Catalysis Research and Innovation, and Department of Chemistry and Biomolecular Sciences , University of Ottawa , Ottawa , ON , Canada K1N 6N5
| |
Collapse
|
21
|
Higman CS, Nascimento DL, Ireland BJ, Audörsch S, Bailey GA, McDonald R, Fogg DE. Chelate-Assisted Ring-Closing Metathesis: A Strategy for Accelerating Macrocyclization at Ambient Temperatures. J Am Chem Soc 2018; 140:1604-1607. [DOI: 10.1021/jacs.7b13257] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Carolyn S. Higman
- Center for Catalysis Research & Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Canada K1N 6N5
| | - Daniel L. Nascimento
- Center for Catalysis Research & Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Canada K1N 6N5
| | - Benjamin J. Ireland
- Center for Catalysis Research & Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Canada K1N 6N5
| | - Stephan Audörsch
- Center for Catalysis Research & Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Canada K1N 6N5
| | - Gwendolyn A. Bailey
- Center for Catalysis Research & Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Canada K1N 6N5
| | - Robert McDonald
- X-Ray
Crystallography Laboratory, University of Alberta, Edmonton, Canada T6G 2G2
| | - Deryn E. Fogg
- Center for Catalysis Research & Innovation, and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Canada K1N 6N5
| |
Collapse
|
22
|
Abstract
Phosphine-scavenging Merrifield resins can significantly facilitate the synthesis of highly active Ru metathesis catalysts, including the second-generation Grubbs, Hoveyda, and indenylidene catalysts (GII, HII, InII).
Collapse
Affiliation(s)
- Daniel L. Nascimento
- Centre for Catalysis Research & Innovation, and Department of Chemistry and Biomolecular Sciences
- University of Ottawa
- Ottawa
- Canada
| | - Emma C. Davy
- Centre for Catalysis Research & Innovation, and Department of Chemistry and Biomolecular Sciences
- University of Ottawa
- Ottawa
- Canada
| | - Deryn E. Fogg
- Centre for Catalysis Research & Innovation, and Department of Chemistry and Biomolecular Sciences
- University of Ottawa
- Ottawa
- Canada
| |
Collapse
|
23
|
Bailey GA, Lummiss JAM, Foscato M, Occhipinti G, McDonald R, Jensen VR, Fogg DE. Decomposition of Olefin Metathesis Catalysts by Brønsted Base: Metallacyclobutane Deprotonation as a Primary Deactivating Event. J Am Chem Soc 2017; 139:16446-16449. [DOI: 10.1021/jacs.7b08578] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gwendolyn A. Bailey
- Center
for Catalysis Research and Innovation, and Department of Chemistry
and Biomolecular Sciences, University of Ottawa, Ottawa K1N 6N5, Canada
| | - Justin A. M. Lummiss
- Center
for Catalysis Research and Innovation, and Department of Chemistry
and Biomolecular Sciences, University of Ottawa, Ottawa K1N 6N5, Canada
| | - Marco Foscato
- Department
of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| | - Giovanni Occhipinti
- Department
of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| | - Robert McDonald
- X-Ray
Crystallography Laboratory, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Vidar R. Jensen
- Department
of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| | - Deryn E. Fogg
- Center
for Catalysis Research and Innovation, and Department of Chemistry
and Biomolecular Sciences, University of Ottawa, Ottawa K1N 6N5, Canada
| |
Collapse
|
24
|
Higman CS, Rufh SA, McDonald R, Fogg DE. Synthesis and dynamic behaviour of a dimeric ruthenium benzylidene complex bearing a truncated N-heterocyclic carbene ligand. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.03.033] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
25
|
Affiliation(s)
- Deryn E. Fogg
- Department of Chemistry and Biomolecular Sciences, and Centre for Catalysis Research & Innovation, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
| |
Collapse
|
26
|
Santos AG, Bailey GA, dos Santos EN, Fogg DE. Overcoming Catalyst Decomposition in Acrylate Metathesis: Polyphenol Resins as Enabling Agents for PCy3-Stabilized Metathesis Catalysts. ACS Catal 2017. [DOI: 10.1021/acscatal.6b03557] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alexandra G. Santos
- Departamento
de Química-ICEx, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, Brazil
| | - Gwendolyn A. Bailey
- Department of Chemistry and Biomolecular Sciences, and Centre for Catalysis Research & Innovation, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
| | - Eduardo N. dos Santos
- Departamento
de Química-ICEx, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, Brazil
| | - Deryn E. Fogg
- Department of Chemistry and Biomolecular Sciences, and Centre for Catalysis Research & Innovation, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
| |
Collapse
|
27
|
McClennan WL, Rufh SA, Lummiss JAM, Fogg DE. A General Decomposition Pathway for Phosphine-Stabilized Metathesis Catalysts: Lewis Donors Accelerate Methylidene Abstraction. J Am Chem Soc 2016; 138:14668-14677. [DOI: 10.1021/jacs.6b08372] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- William L. McClennan
- Department of Chemistry and Centre for Catalysis Research & Innovation, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Stephanie A. Rufh
- Department of Chemistry and Centre for Catalysis Research & Innovation, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Justin A. M. Lummiss
- Department of Chemistry and Centre for Catalysis Research & Innovation, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Deryn E. Fogg
- Department of Chemistry and Centre for Catalysis Research & Innovation, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| |
Collapse
|
28
|
Affiliation(s)
- François P. Gabbaï
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
| | - Paul J. Chirik
- Department
of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Deryn E. Fogg
- Center for Catalysis Research & Innovation and Department of Chemistry and Biological Sciences, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
| | - Karsten Meyer
- Department
of Chemistry and Pharmacy Inorganic Chemistry, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstr. 1, 91058 Erlangen, Germany
| | - Daniel J. Mindiola
- Department
of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Laurel L. Schafer
- Department
of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
| | - Shu-Li You
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of
Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, People’s Republic of China
| |
Collapse
|
29
|
Higman CS, Lanterna AE, Marin ML, Scaiano JC, Fogg DE. Cover Picture: Catalyst Decomposition during Olefin Metathesis Yields Isomerization-Active Ruthenium Nanoparticles (ChemCatChem 15/2016). ChemCatChem 2016. [DOI: 10.1002/cctc.201600908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Carolyn S. Higman
- Center for Catalysis Research & Innovation; Department of Chemistry and Biomolecular Sciences; University of Ottawa; 10 Marie Curie Ottawa ON K1N 6N5 Canada
| | - Anabel E. Lanterna
- Center for Catalysis Research & Innovation; Department of Chemistry and Biomolecular Sciences; University of Ottawa; 10 Marie Curie Ottawa ON K1N 6N5 Canada
| | - M. Luisa Marin
- Center for Catalysis Research & Innovation; Department of Chemistry and Biomolecular Sciences; University of Ottawa; 10 Marie Curie Ottawa ON K1N 6N5 Canada
| | - Juan C. Scaiano
- Center for Catalysis Research & Innovation; Department of Chemistry and Biomolecular Sciences; University of Ottawa; 10 Marie Curie Ottawa ON K1N 6N5 Canada
| | - Deryn E. Fogg
- Center for Catalysis Research & Innovation; Department of Chemistry and Biomolecular Sciences; University of Ottawa; 10 Marie Curie Ottawa ON K1N 6N5 Canada
| |
Collapse
|
30
|
Higman CS, Lanterna AE, Marin ML, Scaiano JC, Fogg DE. Catalyst Decomposition during Olefin Metathesis Yields Isomerization-Active Ruthenium Nanoparticles. ChemCatChem 2016. [DOI: 10.1002/cctc.201600890] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Carolyn S. Higman
- Center for Catalysis Research & Innovation; Department of Chemistry and Biomolecular Sciences; University of Ottawa; 10 Marie Curie Ottawa ON K1N 6N5 Canada
| | - Anabel E. Lanterna
- Center for Catalysis Research & Innovation; Department of Chemistry and Biomolecular Sciences; University of Ottawa; 10 Marie Curie Ottawa ON K1N 6N5 Canada
| | - M. Luisa Marin
- Center for Catalysis Research & Innovation; Department of Chemistry and Biomolecular Sciences; University of Ottawa; 10 Marie Curie Ottawa ON K1N 6N5 Canada
| | - Juan C. Scaiano
- Center for Catalysis Research & Innovation; Department of Chemistry and Biomolecular Sciences; University of Ottawa; 10 Marie Curie Ottawa ON K1N 6N5 Canada
| | - Deryn E. Fogg
- Center for Catalysis Research & Innovation; Department of Chemistry and Biomolecular Sciences; University of Ottawa; 10 Marie Curie Ottawa ON K1N 6N5 Canada
| |
Collapse
|
31
|
Higman CS, Lanterna AE, Marin ML, Scaiano JC, Fogg DE. Catalyst Decomposition during Olefin Metathesis Yields Isomerization-Active Ruthenium Nanoparticles. ChemCatChem 2016. [DOI: 10.1002/cctc.201600738] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Carolyn S. Higman
- Center for Catalysis Research & Innovation; Department of Chemistry and Biomolecular Sciences; University of Ottawa; 10 Marie Curie Ottawa ON K1N 6N5 Canada
| | - Anabel E. Lanterna
- Center for Catalysis Research & Innovation; Department of Chemistry and Biomolecular Sciences; University of Ottawa; 10 Marie Curie Ottawa ON K1N 6N5 Canada
| | - M. Luisa Marin
- Center for Catalysis Research & Innovation; Department of Chemistry and Biomolecular Sciences; University of Ottawa; 10 Marie Curie Ottawa ON K1N 6N5 Canada
| | - Juan C. Scaiano
- Center for Catalysis Research & Innovation; Department of Chemistry and Biomolecular Sciences; University of Ottawa; 10 Marie Curie Ottawa ON K1N 6N5 Canada
| | - Deryn E. Fogg
- Center for Catalysis Research & Innovation; Department of Chemistry and Biomolecular Sciences; University of Ottawa; 10 Marie Curie Ottawa ON K1N 6N5 Canada
| |
Collapse
|
32
|
Affiliation(s)
- Gwendolyn A. Bailey
- Center for Catalysis Research & Innovation and Department of Chemistry and Biological Sciences, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
| | - Deryn E. Fogg
- Center for Catalysis Research & Innovation and Department of Chemistry and Biological Sciences, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
| |
Collapse
|
33
|
Lummiss JAM, Perras FA, McDonald R, Bryce DL, Fogg DE. Sterically Driven Olefin Metathesis: The Impact of Alkylidene Substitution on Catalyst Activity. Organometallics 2016. [DOI: 10.1021/acs.organomet.5b00984] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Justin A. M. Lummiss
- Centre for Catalysis Research & Innovation and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, ON, Canada, K1N 6N5
| | - Frédéric A. Perras
- Centre for Catalysis Research & Innovation and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, ON, Canada, K1N 6N5
| | - Robert McDonald
- X-ray
Crystallographic Laboratory, Department of Chemistry, University of Alberta, Edmonton, AB, Canada, T6G 2G2
| | - David L. Bryce
- Centre for Catalysis Research & Innovation and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, ON, Canada, K1N 6N5
| | - Deryn E. Fogg
- Centre for Catalysis Research & Innovation and Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, ON, Canada, K1N 6N5
| |
Collapse
|
34
|
Higman CS, Lummiss JAM, Fogg DE. Olefinmetathese als aufstrebende Methode zur Herstellung von Pharmazeutika und Spezialchemikalien. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201506846] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Carolyn S. Higman
- Chemistry Department, Center for Catalysis Research & Innovation; University of Ottawa; Ottawa ON K1N 6N5 Kanada
| | - Justin A. M. Lummiss
- Chemistry Department, Center for Catalysis Research & Innovation; University of Ottawa; Ottawa ON K1N 6N5 Kanada
| | - Deryn E. Fogg
- Chemistry Department, Center for Catalysis Research & Innovation; University of Ottawa; Ottawa ON K1N 6N5 Kanada
| |
Collapse
|
35
|
Higman CS, Lummiss JAM, Fogg DE. Olefin Metathesis at the Dawn of Implementation in Pharmaceutical and Specialty-Chemicals Manufacturing. Angew Chem Int Ed Engl 2016; 55:3552-65. [DOI: 10.1002/anie.201506846] [Citation(s) in RCA: 202] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 11/16/2015] [Indexed: 01/30/2023]
Affiliation(s)
- Carolyn S. Higman
- Chemistry Department; Center for Catalysis Research & Innovation; University of Ottawa; Ottawa ON K1N 6N5 Canada
| | - Justin A. M. Lummiss
- Chemistry Department; Center for Catalysis Research & Innovation; University of Ottawa; Ottawa ON K1N 6N5 Canada
| | - Deryn E. Fogg
- Chemistry Department; Center for Catalysis Research & Innovation; University of Ottawa; Ottawa ON K1N 6N5 Canada
| |
Collapse
|
36
|
Higman CS, de Araujo MP, Fogg DE. Tandem catalysis versus one-pot catalysis: ensuring process orthogonality in the transformation of essential-oil phenylpropenoids into high-value products via olefin isomerization–metathesis. Catal Sci Technol 2016. [DOI: 10.1039/c5cy02038g] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
One-pot and tandem catalysis methodologies are explored in developing efficient isomerization–metathesis routes to high-value cinnamates and ferulates from essential-oil allylbenzenes.
Collapse
Affiliation(s)
- Carolyn S. Higman
- Center for Catalysis Research & Innovation, and Department of Chemistry
- University of Ottawa
- Ottawa
- Canada
| | - Marcio P. de Araujo
- Center for Catalysis Research & Innovation, and Department of Chemistry
- University of Ottawa
- Ottawa
- Canada
| | - Deryn E. Fogg
- Center for Catalysis Research & Innovation, and Department of Chemistry
- University of Ottawa
- Ottawa
- Canada
| |
Collapse
|
37
|
Lummiss JAM, Higman CS, Fyson DL, McDonald R, Fogg DE. The divergent effects of strong NHC donation in catalysis. Chem Sci 2015; 6:6739-6746. [PMID: 29861923 PMCID: PMC5947514 DOI: 10.1039/c5sc02592c] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Accepted: 10/05/2015] [Indexed: 11/30/2022] Open
Abstract
The inverse relationship between NHC donicity and catalyst initiation.
Strong σ-donation from NHC ligands (NHC = N-heterocyclic carbene) is shown to have profoundly conflicting consequences for the reactivity of transition-metal catalysts. Such donation is regarded as central to high catalyst activity in many contexts, of which the second-generation Grubbs metathesis catalysts (RuCl2(NHC)(PCy3)(
Created by potrace 1.16, written by Peter Selinger 2001-2019
]]>
CHPh), GII) offer an early, prominent example. Less widely recognized is the dramatically inhibiting impact of NHC ligation on initiation of GII, and on re-entry into the catalytic cycle from the resting-state methylidene species RuCl2(NHC)(PCy3)(
Created by potrace 1.16, written by Peter Selinger 2001-2019
]]>
CH2), GIIm. Both GII and the methylidene complexes are activated by dissociation of PCy3. The impact of NHC donicity on the rate of PCy3 loss is explored in a comparison of s-GIIm, vs.u-GIIm, in which the NHC ligand is saturated H2IMes or unsaturated IMes, respectively. PCy3 loss is nearly an order of magnitude slower for the IMes derivative (a difference that is replicated, albeit smaller, for the benzylidene precatalysts GII). Proposed as an overlooked contributor to these rate differences is an increase in the Ru–PCy3 bond strength arising from π-back-donation onto the phosphine ligand. Strong σ-donation from the IMes ligand, coupled with the inability of this unsaturated NHC to participate in significant π-backbonding, amplifies Ru → PCy3 π-back-donation. The resulting increase in Ru–P bond strength greatly inhibits entry into the active cycle. For s-GII, in contrast, the greater π-acceptor capacity of the NHC ligand enables competing Ru → H2IMes back-donation (as confirmed by NOE experiments, which reveal restricted rotation about the Ru–NHC bond for H2IMes, but not IMes). Ru → PCy3 back-donation is thus attenuated in the H2IMes complexes, accounting for the greater lability of the PCy3 ligand in s-GIIm and s-GII. Similarly inhibited initiation is predicted for other metal–NHC catalysts in which a π-acceptor ligand L must be dissociated to permit substrate binding. Conversely, enhanced reactivity can be expected where such L ligands are pure σ-donors. These effects are expected to be particularly dramatic where the NHC ligand has minimal π-acceptor capacity (as in the unsaturated Arduengo carbenes), and in geometries that maximize NHC–M–L orbital interactions.
Collapse
Affiliation(s)
- Justin A M Lummiss
- Center for Catalysis Research & Innovation and Department of Chemistry , University of Ottawa , Ottawa , K1N 6N5 , Canada .
| | - Carolyn S Higman
- Center for Catalysis Research & Innovation and Department of Chemistry , University of Ottawa , Ottawa , K1N 6N5 , Canada .
| | - Devon L Fyson
- Center for Catalysis Research & Innovation and Department of Chemistry , University of Ottawa , Ottawa , K1N 6N5 , Canada .
| | - Robert McDonald
- Department of Chemistry , University of Alberta , Edmonton , T6G 2G2 , AB , Canada
| | - Deryn E Fogg
- Center for Catalysis Research & Innovation and Department of Chemistry , University of Ottawa , Ottawa , K1N 6N5 , Canada .
| |
Collapse
|
38
|
Ireland BJ, Dobigny BT, Fogg DE. Decomposition of a Phosphine-Free Metathesis Catalyst by Amines and Other Bronsted Bases: Metallacyclobutane Deprotonation as a Major Deactivation Pathway. ACS Catal 2015. [DOI: 10.1021/acscatal.5b00813] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Benjamin J. Ireland
- Department of Chemistry and Centre for Catalysis Research & Innovation, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
| | - Bernadette T. Dobigny
- Department of Chemistry and Centre for Catalysis Research & Innovation, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
| | - Deryn E. Fogg
- Department of Chemistry and Centre for Catalysis Research & Innovation, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
| |
Collapse
|
39
|
Bailey GA, Fogg DE. Acrylate metathesis via the second-generation Grubbs catalyst: unexpected pathways enabled by a PCy3-generated enolate. J Am Chem Soc 2015; 137:7318-21. [PMID: 26030596 DOI: 10.1021/jacs.5b04524] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The diverse applications of acrylate metathesis range from synthesis of high-value α,β-unsaturated esters to depolymerization of unsaturated polymers. Examined here are unexpected side reactions promoted by the important Grubbs catalyst GII. Evidence is presented for attack of PCy3 on the acrylate olefin to generate a reactive carbanion, which participates in multiple pathways, including further Michael addition, proton abstraction, and catalyst deactivation. Related chemistry may be anticipated whenever labile metal-phosphine complexes are used to catalyze reactions of substrates bearing an electron-deficient olefin.
Collapse
Affiliation(s)
- Gwendolyn A Bailey
- Center for Catalysis Research and Innovation and Department of Chemistry, University of Ottawa, Ottawa, Ontario K1N6N5 Canada
| | - Deryn E Fogg
- Center for Catalysis Research and Innovation and Department of Chemistry, University of Ottawa, Ottawa, Ontario K1N6N5 Canada
| |
Collapse
|
40
|
Affiliation(s)
- Justin A. M. Lummiss
- Center for Catalysis Research & Innovation and Department of Chemistry, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
| | - William L. McClennan
- Center for Catalysis Research & Innovation and Department of Chemistry, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
| | - Robert McDonald
- Department
of Chemistry, University of Alberta, Edmonton, Alberta, Canada T6G 2G2
| | - Deryn E. Fogg
- Center for Catalysis Research & Innovation and Department of Chemistry, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
| |
Collapse
|
41
|
Gladysz JA, Bochmann M, Fogg DE, Gabbaı̈ FP, Lichtenberger DL, Liebeskind LS, Mindiola DJ. The 2014 Organometallics Symposium. Organometallics 2014. [DOI: 10.1021/om500959g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
42
|
Bates JM, Lummiss JAM, Bailey GA, Fogg DE. Operation of the Boomerang Mechanism in Olefin Metathesis Reactions Promoted by the Second-Generation Hoveyda Catalyst. ACS Catal 2014. [DOI: 10.1021/cs500539m] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Jennifer M. Bates
- Centre for Catalysis Research & Innovation; Department of Chemistry, University of Ottawa, Ottawa, Canada K1N 6N5
| | - Justin A. M. Lummiss
- Centre for Catalysis Research & Innovation; Department of Chemistry, University of Ottawa, Ottawa, Canada K1N 6N5
| | - Gwendolyn A. Bailey
- Centre for Catalysis Research & Innovation; Department of Chemistry, University of Ottawa, Ottawa, Canada K1N 6N5
| | - Deryn E. Fogg
- Centre for Catalysis Research & Innovation; Department of Chemistry, University of Ottawa, Ottawa, Canada K1N 6N5
| |
Collapse
|
43
|
Lummiss JAM, Ireland BJ, Sommers JM, Fogg DE. Amine-Mediated Degradation in Olefin Metathesis Reactions that Employ the Second-Generation Grubbs Catalyst. ChemCatChem 2014. [DOI: 10.1002/cctc.201300861] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
44
|
Abstract
13C-labelled Grubbs catalysts, RuCl2(L)(PCy3)(13CHR) (R = H, Ph), pinpoint the fate of the methylidene (benzylidene) moiety during metathesis and deactivation.
Collapse
Affiliation(s)
- Justin A. M. Lummiss
- Center for Catalysis Research & Innovation
- Chemistry Department
- University of Ottawa
- Ottawa, Canada
| | - Adrian G. G. Botti
- Center for Catalysis Research & Innovation
- Chemistry Department
- University of Ottawa
- Ottawa, Canada
| | - Deryn E. Fogg
- Center for Catalysis Research & Innovation
- Chemistry Department
- University of Ottawa
- Ottawa, Canada
| |
Collapse
|
45
|
|
46
|
Affiliation(s)
- Bianca J. van Lierop
- Center for Catalysis Research & Innovation and Department of Chemistry, University of Ottawa, Ottawa, Ontario, Canada, K1N 6N5
| | - Deryn E. Fogg
- Center for Catalysis Research & Innovation and Department of Chemistry, University of Ottawa, Ottawa, Ontario, Canada, K1N 6N5
| |
Collapse
|
47
|
Ireland BJ, McDonald R, Fogg DE. Exploring the Variable Hapticity of the Arylamide Ligand: Access to σ-Amidophenyl and π-Cyclohexadienylimine Structures. Organometallics 2013. [DOI: 10.1021/om4005252] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Benjamin J. Ireland
- Center for Catalysis Research & Innovation and Department of Chemistry, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
| | - Robert McDonald
- X-ray Crystallography Laboratory, Chemistry Department, University of Alberta, Edmonton, Alberta, Canada T6G
2G2
| | - Deryn E. Fogg
- Center for Catalysis Research & Innovation and Department of Chemistry, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
| |
Collapse
|
48
|
van Lierop BJ, Reckling AM, Lummiss JAM, Fogg DE. Inside Cover: Clean, Convenient, High-yield Access to Second-generation Ru Metathesis Catalysts from Commercially Available Precursors (ChemCatChem 12/2012). ChemCatChem 2012. [DOI: 10.1002/cctc.201290045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
49
|
Lummiss JAM, Oliveira KC, Pranckevicius AMT, Santos AG, dos Santos EN, Fogg DE. Chemical Plants: High-Value Molecules from Essential Oils. J Am Chem Soc 2012; 134:18889-91. [DOI: 10.1021/ja310054d] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Justin A. M. Lummiss
- Department of Chemistry and Centre for Catalysis Research & Innovation, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
| | - Kelley C. Oliveira
- Departamento de Química-ICEx, Universidade Federal de Minas Gerais, 31270-901 Belo
Horizonte, Brazil
| | - Alexandre M. T. Pranckevicius
- Department of Chemistry and Centre for Catalysis Research & Innovation, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
| | - Alexandra G. Santos
- Departamento de Química-ICEx, Universidade Federal de Minas Gerais, 31270-901 Belo
Horizonte, Brazil
| | - Eduardo N. dos Santos
- Departamento de Química-ICEx, Universidade Federal de Minas Gerais, 31270-901 Belo
Horizonte, Brazil
| | - Deryn E. Fogg
- Department of Chemistry and Centre for Catalysis Research & Innovation, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
| |
Collapse
|
50
|
van Lierop BJ, Reckling AM, Lummiss JAM, Fogg DE. Clean, Convenient, High-yield Access to Second-generation Ru Metathesis Catalysts from Commercially Available Precursors. ChemCatChem 2012. [DOI: 10.1002/cctc.201200540] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|