1
|
Xu S, Courtemanche MA, Miller J. Volatilization of dimethylsilanediol (DMSD) under environmentally relevant conditions: Sampling method and impact of water and soil materials. Chemosphere 2024; 354:141681. [PMID: 38467199 DOI: 10.1016/j.chemosphere.2024.141681] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 03/06/2024] [Accepted: 03/08/2024] [Indexed: 03/13/2024]
Abstract
Dimethylsilanediol (DMSD) is the common breakdown product of methylsiloxanes such as polydimethylsiloxane (PDMS) and volatile methylsiloxanes (VMS) in soil. In this work, we first present a sorbent selection experiment aiming to identify a sorbent that can trap gas-phase DMSD without causing DMSD condensation and VMS hydrolysis at environmentally relevant humidities. With a proper sorbent (Tenax) identified, the volatilization of DMSD from water and various wet soil and soil materials were measured in a controlled environment. It was demonstrated that DMSD underwent volatilization after soil water was completely evaporated. Various types of soil constituents show drastic differences in preventing DMSD from volatilization. Analysis of the sorbent-captured products provides further insight, most notably that virtually no cyclic methylsiloxanes are formed during the volatilization of DMSD from water or soil materials, except in one extreme case where only traces are detected.
Collapse
Affiliation(s)
- Shihe Xu
- Toxicology, Environmental Research and Consulting, The Dow Chemical Company, Midland, MI, 48642, USA; Currently at Tridge Environmental Consulting LLC, Midland, MI, 48642, USA.
| | | | - Julie Miller
- Toxicology, Environmental Research and Consulting, The Dow Chemical Company, Midland, MI, 48642, USA; Currently at Los Alamos National Laboratory, Los Alamos, NM, 87545, USA
| |
Collapse
|
2
|
Xu S, Courtemanche MA, Miller J. Fate of dimethylsilanediol (DMSD) in soil-plant systems. Chemosphere 2024; 352:141454. [PMID: 38354863 DOI: 10.1016/j.chemosphere.2024.141454] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 01/21/2024] [Accepted: 02/11/2024] [Indexed: 02/16/2024]
Abstract
Dimethylsilanediol (DMSD) is the degradation product of methylsiloxane polymers and oligomers such as volatile cyclic methylsiloxanes (cVMS). To better understand the environmental fate of this key degradation product, we conducted a three-part study on the movement of DMSD in soil. The objective of this third and final study was to determine the fate of DMSD in soil-plant systems under constant irrigation. Soil columns were constructed using two soils with the upper 20 cm layers spiked with 14C-labeled DMSD. Corn seedlings were transplanted into the soil columns and placed in a field plot underneath a transparent cover that prevented rainwater from reaching the soil columns while allowing soil water to be volatilized freely. The soil-plant columns were regularly irrigated with known amounts of DMSD-free plant growth solution to sustain the plant growth. At pre-determined time intervals (15-67 days), the plant and soil columns were sectioned and the distribution of 14Corganosilicon species in the soil profile and plant parts was determined using a combination of Liquid Scintillation Counting and High-Performance Liquid Chromatography-Flow Scintillation Analysis, while soil water loss was determined gravimetrically. It was found that the majority (>92 %) of DMSD initially spiked into the soil was removed from the soil-plant systems. Although DMSD was transported from the soil to the plant, it was subsequently volatilized from the plant via transpiration, with only a small fraction (∼5%) remaining at the conclusion of the experiments. In addition, little non-extractable DMSD was found in the top layer of soil in the soil-plant systems, suggesting that the air-drying of soil is a necessary pre-condition for the formation of such non-extractable silanol residue on topsoil.
Collapse
Affiliation(s)
- Shihe Xu
- Toxicology, Environmental Research and Consulting, The Dow Chemical Company, Midland, MI, 48642, USA; Currently at Tridge Environmental Consulting LLC, Midland, MI 48642, USA.
| | | | - Julie Miller
- Toxicology, Environmental Research and Consulting, The Dow Chemical Company, Midland, MI, 48642, USA; Currently at Los Alamos National Laboratory, Los Alamos, NM 87545, USA
| |
Collapse
|
3
|
Xu S, Courtemanche MA, Miller J. Fate of dimethylsilanediol (DMSD) in outdoor bare surface soil and its relation to soil water loss. Chemosphere 2024; 352:141478. [PMID: 38364924 DOI: 10.1016/j.chemosphere.2024.141478] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 01/21/2024] [Accepted: 02/14/2024] [Indexed: 02/18/2024]
Abstract
Dimethylsilanediol (DMSD) is a primary degradation product of silicone materials in the environment. Due to its low air/water partition coefficient and low soil/water distribution coefficient, this compound is not expected to undergo sorption and volatilization in wet soil. In an accompanying paper, we confirm that under controlled indoor conditions in test tubes, there is little to no volatilization of DMSD from soil and soil constituents if soil is wet. However, a significant amount of DMSD was volatilized when the soil substrates became air dried. Given the importance of water on the partition and fate of DMSD, we now report a continuation of this study focusing on the relation between DMSD removal and water loss in re-constituted soil columns under outdoor conditions. Consistent with predictions based on its partition properties and reconciling this evidence with previously reported field and laboratory studies, DMSD distribution was found to be largely dependent on water partitioning. The results suggested that DMSD moved upward in soil profile as soil water was evaporated from topmost layers with little DMSD retention by the soil matrix. As soil dried, a fraction of DMSD was sorbed by the soil matrix in the topmost layer, while most of the spiked radio-labeled DMSD was removed from soil through volatilization.
Collapse
Affiliation(s)
- Shihe Xu
- Toxicology, Environmental Research and Consulting, the Dow Chemical Company, Midland, MI, 48642, USA; Currently at Tridge Environmental Consulting LLC, Midland, MI, 48642, USA.
| | | | - Julie Miller
- Toxicology, Environmental Research and Consulting, the Dow Chemical Company, Midland, MI, 48642, USA; Currently at Los Alamos National Laboratory, Los Alamos, NM, 87545, USA
| |
Collapse
|
4
|
Knopf I, Courtemanche MA, Cummins CC. Cobalt Complexes Supported by cis-Macrocyclic Diphosphines: Synthesis, Reactivity, and Activity toward Coupling Carbon Dioxide and Ethylene. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00734] [Citation(s) in RCA: 9] [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)
- Ioana Knopf
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139-4307, United States
| | - Marc-André Courtemanche
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139-4307, United States
| | - Christopher C. Cummins
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139-4307, United States
| |
Collapse
|
5
|
Fontaine FG, Courtemanche MA, Légaré MA, Rochette É. Design principles in frustrated Lewis pair catalysis for the functionalization of carbon dioxide and heterocycles. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2016.05.005] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
|
6
|
Affiliation(s)
- Étienne Rochette
- Département de Chimie, Centre de Catalyse et Chimie Verte (C3V); Université Laval; 1045 Avenue de la Médecine Québec G1V 0A6 Québec Canada
| | - Marc-André Courtemanche
- Département de Chimie, Centre de Catalyse et Chimie Verte (C3V); Université Laval; 1045 Avenue de la Médecine Québec G1V 0A6 Québec Canada
| | - Frédéric-Georges Fontaine
- Département de Chimie, Centre de Catalyse et Chimie Verte (C3V); Université Laval; 1045 Avenue de la Médecine Québec G1V 0A6 Québec Canada
| |
Collapse
|
7
|
Abstract
Toward the preparation of a coordination complex of the heterodiatomic molecule PN, P≡N-V(N[tBu]Ar)3 (1, Ar = 3,5-Me2C6H3), we report the use of ClPA (A = C14H10, anthracene) as a formal source of phosphorus(I) in its reaction with Na[NV(N[tBu]Ar)3] (Na[4]) to yield trimeric cyclo-triphosphane [PNV(N[tBu]Ar)3]3 (3) with a core composed exclusively of phosphorus and nitrogen. In the presence of NapS2 (peri-1,8-naphthalene disulfide), NapS2P-NV(N[tBu]Ar)3 (6) is instead generated in 80% yield, suggesting trapping of transient 1. Upon mild heating, 3 readily fragments into dimeric [PNV(N[tBu]Ar)3]2 (2), while in the presence of bis(trimethylsilyl)acetylene or cis-4-octene, the respective phosphirene (Ar[tBu]N)3VN-PC2(SiMe3)2 (7) or phosphirane (Ar[tBu]N)3VN-P(C8H16) (8) compounds are generated. Kinetic data were found to be consistent with unimolecular decay of 3, and [2+1]-cycloaddition with radical clocks ruled out a triplet intermediate, consistent with intermediate 1 reacting as a singlet phosphinidene. In addition, both 7 and 8 were shown to reversibly exchange cis-4-octene and bis(trimethylsilyl)acetylene, serving as formal sources of 1, a reactivity manifold traditionally reserved for transition metals.
Collapse
Affiliation(s)
- Marc-André Courtemanche
- Department of Chemistry, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
| | - Wesley J Transue
- Department of Chemistry, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
| | - Christopher C Cummins
- Department of Chemistry, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
| |
Collapse
|
8
|
Courtemanche MA, Rochette É, Légaré MA, Bi W, Fontaine FG. Reversible hydrogen activation by a bulky haloborane based FLP system. Dalton Trans 2016; 45:6129-35. [DOI: 10.1039/c5dt03916a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The FLP species bis(2-(TMP)phenyl)chloroborane was prepared as a monomeric Frustrated Lewis Pair displaying no B–N interaction. Species 1 reacts with H2 to generate reversibly the zwitterionic H2 activation product.
Collapse
Affiliation(s)
| | | | | | - Wenhua Bi
- Département de Chimie
- Université Laval
- Québec
- Canada
| | | |
Collapse
|
9
|
Desroches M, Courtemanche MA, Rioux G, Morin JF. Synthesis and Properties of Rhomboidal Macrocyclic Subunits of Graphdiyne-Like Nanoribbons. J Org Chem 2015; 80:10634-42. [DOI: 10.1021/acs.joc.5b01752] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Maude Desroches
- Département de Chimie and
Centre de Recherche sur les Matériaux
Avancés (CERMA) and ‡Département de Chimie and Centre en Catalyse
et Chimie Verte (C3V), Université Laval, 1045 Ave de la
Médecine, Québec, Canada G1V 0A6
| | - Marc-André Courtemanche
- Département de Chimie and
Centre de Recherche sur les Matériaux
Avancés (CERMA) and ‡Département de Chimie and Centre en Catalyse
et Chimie Verte (C3V), Université Laval, 1045 Ave de la
Médecine, Québec, Canada G1V 0A6
| | - Geneviève Rioux
- Département de Chimie and
Centre de Recherche sur les Matériaux
Avancés (CERMA) and ‡Département de Chimie and Centre en Catalyse
et Chimie Verte (C3V), Université Laval, 1045 Ave de la
Médecine, Québec, Canada G1V 0A6
| | - Jean-François Morin
- Département de Chimie and
Centre de Recherche sur les Matériaux
Avancés (CERMA) and ‡Département de Chimie and Centre en Catalyse
et Chimie Verte (C3V), Université Laval, 1045 Ave de la
Médecine, Québec, Canada G1V 0A6
| |
Collapse
|
10
|
Abstract
Transition metal complexes are efficient catalysts for the C-H bond functionalization of heteroarenes to generate useful products for the pharmaceutical and agricultural industries. However, the costly need to remove potentially toxic trace metals from the end products has prompted great interest in developing metal-free catalysts that can mimic metallic systems. We demonstrated that the borane (1-TMP-2-BH2-C6H4)2 (TMP, 2,2,6,6-tetramethylpiperidine) can activate the C-H bonds of heteroarenes and catalyze the borylation of furans, pyrroles, and electron-rich thiophenes. The selectivities complement those observed with most transition metal catalysts reported for this transformation.
Collapse
Affiliation(s)
- Marc-André Légaré
- Département de Chimie, Centre de Catalyse et Chimie Verte (C3V), Université Laval, 1045 Avenue de la Médecine, Québec, QC G1V 0A6, Canada
| | - Marc-André Courtemanche
- Département de Chimie, Centre de Catalyse et Chimie Verte (C3V), Université Laval, 1045 Avenue de la Médecine, Québec, QC G1V 0A6, Canada
| | - Étienne Rochette
- Département de Chimie, Centre de Catalyse et Chimie Verte (C3V), Université Laval, 1045 Avenue de la Médecine, Québec, QC G1V 0A6, Canada
| | | |
Collapse
|
11
|
Courtemanche MA, Pulis AP, Rochette É, Légaré MA, Stephan DW, Fontaine FG. Intramolecular B/N frustrated Lewis pairs and the hydrogenation of carbon dioxide. Chem Commun (Camb) 2015; 51:9797-800. [PMID: 25994329 DOI: 10.1039/c5cc03072b] [Citation(s) in RCA: 93] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The FLP species 1-BR2-2-NMe2-C6H4 (R = 2,4,6-Me3C6H2, 2,4,5-Me3C6H2) reacts with H2 in sequential hydrogen activation and protodeborylation reactions to give (1-BH2-2-NMe2-C6H4)2. While reacts with H2/CO2 to give formyl, acetal and methoxy-derivatives, reacts with H2/CO2 to give C6H4(NMe2)(B(2,4,5-Me3C6H2)O)2CH2. The mechanism of CO2 reduction is considered.
Collapse
Affiliation(s)
- Marc-André Courtemanche
- Département de Chimie, Université Laval, 1045 Avenue de la Médecine, Québec (Québec), Canada, G1V 0A6.
| | | | | | | | | | | |
Collapse
|
12
|
Rochette É, Courtemanche MA, Pulis AP, Bi W, Fontaine FG. Ambiphilic Frustrated Lewis Pair Exhibiting High Robustness and Reversible Water Activation: Towards the Metal-Free Hydrogenation of Carbon Dioxide. Molecules 2015; 20:11902-14. [PMID: 26132911 PMCID: PMC6331835 DOI: 10.3390/molecules200711902] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Revised: 06/04/2015] [Accepted: 06/19/2015] [Indexed: 12/15/2022] Open
Abstract
The synthesis and structural characterization of a phenylene-bridged Frustrated Lewis Pair (FLP) having a 2,2,6,6-tetramethylpiperidine (TMP) as the Lewis base and a 9-borabicyclo[3.3.1]nonane (BBN) as the Lewis acid is reported. This FLP exhibits unique robustness towards the products of carbon dioxide hydrogenation. The compound shows reversible splitting of water, formic acid and methanol while no reaction is observed in the presence of excess formaldehyde. The molecule is incredibly robust, showing little sign of degradation after heating at 80 °C in benzene with 10 equiv. of formic acid for 24 h. The robustness of the system could be exploited in the design of metal-free catalysts for the hydrogenation of carbon dioxide.
Collapse
Affiliation(s)
- Étienne Rochette
- Department of Chemistry, Centre de Catalyse et Chimie Verte (C3V), Université Laval, 1045 Avenue de la Médecine, Québec, QC G1V 0A6, Canada.
| | - Marc-André Courtemanche
- Department of Chemistry, Centre de Catalyse et Chimie Verte (C3V), Université Laval, 1045 Avenue de la Médecine, Québec, QC G1V 0A6, Canada.
| | - Alexander P Pulis
- Department of Chemistry, University of Toronto, 80 George Street, Toronto, ON M5S 3H6, Canada.
| | - Wenhua Bi
- Department of Chemistry, Centre de Catalyse et Chimie Verte (C3V), Université Laval, 1045 Avenue de la Médecine, Québec, QC G1V 0A6, Canada.
| | - Frédéric-Georges Fontaine
- Department of Chemistry, Centre de Catalyse et Chimie Verte (C3V), Université Laval, 1045 Avenue de la Médecine, Québec, QC G1V 0A6, Canada.
| |
Collapse
|
13
|
Courtemanche MA, Légaré MA, Rochette É, Fontaine FG. Phosphazenes: efficient organocatalysts for the catalytic hydrosilylation of carbon dioxide. Chem Commun (Camb) 2015; 51:6858-61. [PMID: 25791523 DOI: 10.1039/c5cc01282a] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Phosphazene superbases are efficient organocatalysts for the metal-free catalytic hydrosilylation of carbon dioxide. They react with CO2 to form the respective phosphine oxides, but in the presence of hydrosilanes, CO2 can be selectively reduced to silyl formates, which can in turn be reduced to methoxysilanes by addition of an extra loading of silanes. Activities reach a TOF of 32 h(-1) with a TON of 759. It is also shown that unexpectedly, N,N-dimethylformamide can reduce CO2 to a mixture of silyl formates, acetals and methoxides in the absence of any catalyst.
Collapse
Affiliation(s)
- Marc-André Courtemanche
- Département de Chimie and Centre de Catalyse et Chimie Verte (C3V), Université Laval, 1045 Avenue de la Médecine, Québec, Canada.
| | | | | | | |
Collapse
|
14
|
Declercq R, Bouhadir G, Bourissou D, Légaré MA, Courtemanche MA, Nahi KS, Bouchard N, Fontaine FG, Maron L. Hydroboration of Carbon Dioxide Using Ambiphilic Phosphine–Borane Catalysts: On the Role of the Formaldehyde Adduct. ACS Catal 2015. [DOI: 10.1021/acscatal.5b00189] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [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)
- Richard Declercq
- Université de Toulouse, UPS, Laboratoire Hétérochimie Fondamentale et Appliqué (LHFA), 118 route de Narbonne, 31062 Toulouse, France
- CNRS, LHFA, UMR 5069, 31062 Toulouse, France
| | - Ghenwa Bouhadir
- Université de Toulouse, UPS, Laboratoire Hétérochimie Fondamentale et Appliqué (LHFA), 118 route de Narbonne, 31062 Toulouse, France
- CNRS, LHFA, UMR 5069, 31062 Toulouse, France
| | - Didier Bourissou
- Université de Toulouse, UPS, Laboratoire Hétérochimie Fondamentale et Appliqué (LHFA), 118 route de Narbonne, 31062 Toulouse, France
- CNRS, LHFA, UMR 5069, 31062 Toulouse, France
| | - Marc-André Légaré
- Département
de Chimie, Université Laval, 1045 Avenue de la Médecine, Québec (Québec), Canada, G1V 0A6
| | - Marc-André Courtemanche
- Département
de Chimie, Université Laval, 1045 Avenue de la Médecine, Québec (Québec), Canada, G1V 0A6
| | - Karine Syrine Nahi
- Département
de Chimie, Université Laval, 1045 Avenue de la Médecine, Québec (Québec), Canada, G1V 0A6
| | - Nicolas Bouchard
- Département
de Chimie, Université Laval, 1045 Avenue de la Médecine, Québec (Québec), Canada, G1V 0A6
| | - Frédéric-Georges Fontaine
- Département
de Chimie, Université Laval, 1045 Avenue de la Médecine, Québec (Québec), Canada, G1V 0A6
| | - Laurent Maron
- Université de Toulouse, INSA, UPS, LCPNO, CNRS, UMR 5215 CNRS-UPS-INSA, 135 avenue de Rangueil, 31400 Toulouse, France
| |
Collapse
|
15
|
Abstract
Metal-free systems, including frustrated Lewis pairs (FLPs) have been shown to bind CO2. By reducing the Lewis acidity and basicity of the ambiphilic system, it is possible to generate active catalysts for the deoxygenative hydroboration of carbon dioxide to methanol derivatives with conversion rates comparable to those of transition-metal-based catalysts.
Collapse
Affiliation(s)
- Frédéric-Georges Fontaine
- Département de Chimie,Université Laval, 1045 Avenue de la Médecine, Québec, QC, G1V 0A6 (Canada), Fax: (+1) 418-656-7916.
| | | | | |
Collapse
|
16
|
Légaré MA, Courtemanche MA, Fontaine FG. Lewis base activation of borane–dimethylsulfide into strongly reducing ion pairs for the transformation of carbon dioxide to methoxyboranes. Chem Commun (Camb) 2014; 50:11362-5. [DOI: 10.1039/c4cc04857a] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The hydroboration of carbon dioxide into methoxyboranes by borane–dimethylsulfide using different base catalysts, including notably non-nucleophilic proton sponge, is described.
Collapse
Affiliation(s)
- Marc-André Légaré
- Département de Chimie and Centre de Recherche sur la Catalyse et la Chimie Verte (C3V)
- Université Laval
- Québec, Canada
| | - Marc-André Courtemanche
- Département de Chimie and Centre de Recherche sur la Catalyse et la Chimie Verte (C3V)
- Université Laval
- Québec, Canada
| | - Frédéric-Georges Fontaine
- Département de Chimie and Centre de Recherche sur la Catalyse et la Chimie Verte (C3V)
- Université Laval
- Québec, Canada
| |
Collapse
|
17
|
Courtemanche MA, Larouche J, Légaré MA, Bi W, Maron L, Fontaine FG. A Tris(triphenylphosphine)aluminum Ambiphilic Precatalyst for the Reduction of Carbon Dioxide with Catecholborane. Organometallics 2013. [DOI: 10.1021/om400645s] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Marc-André Courtemanche
- Département de Chimie, Centre de Catalyse et
Chimie Verte (C3V), Université Laval, 1045 Avenue de la Médecine, Québec (Québec),
Canada G1V 0A6
| | - Jérémie Larouche
- Département de Chimie, Centre de Catalyse et
Chimie Verte (C3V), Université Laval, 1045 Avenue de la Médecine, Québec (Québec),
Canada G1V 0A6
| | - Marc-André Légaré
- Département de Chimie, Centre de Catalyse et
Chimie Verte (C3V), Université Laval, 1045 Avenue de la Médecine, Québec (Québec),
Canada G1V 0A6
| | - Wenhua Bi
- Département de Chimie, Centre de Catalyse et
Chimie Verte (C3V), Université Laval, 1045 Avenue de la Médecine, Québec (Québec),
Canada G1V 0A6
| | - Laurent Maron
- Université de Toulouse, INSA, UPS, LCPNO, CNRS, UMR 5215 CNRS-UPS-INSA,
135 avenue de Rangueil, Toulouse, France
| | - Frédéric-Georges Fontaine
- Département de Chimie, Centre de Catalyse et
Chimie Verte (C3V), Université Laval, 1045 Avenue de la Médecine, Québec (Québec),
Canada G1V 0A6
| |
Collapse
|
18
|
Courtemanche MA, Légaré MA, Maron L, Fontaine FG. A highly active phosphine-borane organocatalyst for the reduction of CO2 to methanol using hydroboranes. J Am Chem Soc 2013; 135:9326-9. [PMID: 23750670 DOI: 10.1021/ja404585p] [Citation(s) in RCA: 251] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
In this work, we report that organocatalyst 1-Bcat-2-PPh2-C6H4 ((1); cat = catechol) acts as an ambiphilic metal-free system for the reduction of carbon dioxide in presence of hydroboranes (HBR2 = HBcat (catecholborane), HBpin (pinacolborane), 9-BBN (9-borabicyclo[3.3.1]nonane), BH3·SMe2 and BH3·THF) to generate CH3OBR2 or (CH3OBO)3, products that can be readily hydrolyzed to methanol. The yields can be as high as 99% with exclusive formation of CH3OBR2 or (CH3OBO)3 with TON (turnover numbers) and TOF (turnover frequencies) reaching >2950 and 853 h(-1), respectively. Furthermore, the catalyst exhibits "living" behavior: once the first loading is consumed, it resumes its activity on adding another loading of reagents.
Collapse
Affiliation(s)
- Marc-André Courtemanche
- Département de Chimie, Centre de Catalyse et de Chimie Verte (C3V), Université Laval, Québec G1V 0A6, Canada
| | | | | | | |
Collapse
|
19
|
Boudreau J, Courtemanche MA, Marx VM, Jean Burnell D, Fontaine FG. Ambiphilic molecules for trapping reactive intermediates: interrupted Nazarov reaction of allenyl vinyl ketones with Me2PCH2AlMe2. Chem Commun (Camb) 2012; 48:11250-2. [DOI: 10.1039/c2cc35257e] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
20
|
Bélanger É, Pouliot MF, Courtemanche MA, Paquin JF. Design, Synthesis, and Applications of Potential Substitutes of t-Bu-Phosphinooxazoline in Pd-Catalyzed Asymmetric Transformations and Their Use for the Improvement of the Enantioselectivity in the Pd-Catalyzed Allylation Reaction of Fluorinated Allyl Enol Carbonates. J Org Chem 2011; 77:317-31. [DOI: 10.1021/jo2019653] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [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)
- Étienne Bélanger
- Canada Research Chair
in Organic and Medicinal Chemistry,
Département de chimie, Université Laval, 1045 avenue de la Médecine, Québec, QC, Canada G1V 0A6
| | - Marie-France Pouliot
- Canada Research Chair
in Organic and Medicinal Chemistry,
Département de chimie, Université Laval, 1045 avenue de la Médecine, Québec, QC, Canada G1V 0A6
| | - Marc-André Courtemanche
- Canada Research Chair
in Organic and Medicinal Chemistry,
Département de chimie, Université Laval, 1045 avenue de la Médecine, Québec, QC, Canada G1V 0A6
| | - Jean-François Paquin
- Canada Research Chair
in Organic and Medicinal Chemistry,
Département de chimie, Université Laval, 1045 avenue de la Médecine, Québec, QC, Canada G1V 0A6
| |
Collapse
|
21
|
|