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Byrne JP, Delgado L, Paradisi F, Albrecht M. Carbohydrate‐functionalized triazolylidene iridium complexes: hydrogenation catalysis in water with asymmetric induction. ChemCatChem 2022; 14:e202200086. [PMID: 35910522 PMCID: PMC9310948 DOI: 10.1002/cctc.202200086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 02/23/2022] [Indexed: 12/02/2022]
Abstract
Two sets of carbohydrate‐NHC hybrid iridium complexes were synthesised in order to combine properties of carbohydrates and triazolylidene (trz) ligands in organometallic catalysis. One set features a direct trz linkage to the anomeric carbohydrate carbon, while the second set is comprised of an ethyl linker between the two functional units. Deprotection of the carbohydrate afforded hybrid complexes that efficiently catalyse the direct hydrogenation of ketones in water. The catalytic activity of the hybrid complexes was influenced by the pH of the aqueous medium and surpassed the activity of carbohydrate‐free or acetyl‐protected analogues (>90 % vs 13 % yield). While no enantiomeric induction was observed for the ethyl‐linked hybrids, a moderate enantiomeric excess (ee) was induced by the directly linked systems. Moreover, these carbohydrate‐trz hybrid complexes displayed mixed inhibitory activity towards a glycosidase from H. orenii that contain a glucose binding site.
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Affiliation(s)
- Joseph P Byrne
- Universität Bern: Universitat Bern Department of Chemistry, Biochemistry and Pharmaceutical Sciences SWITZERLAND
| | - Lydia Delgado
- University of Nottingham University Park Campus: University of Nottingham School of Chemistry UNITED KINGDOM
| | - Francesca Paradisi
- Universität Bern: Universitat Bern Department of Chemistry, Biochemistry and Pharmaceutical Sciences SWITZERLAND
| | - Martin Albrecht
- Universität Bern: Universitat Bern Department of Chemistry, Biochemistry and Pharmaceutical Sciences Freiestrasse 3 3012 Bern SWITZERLAND
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Nepal P, Kalapugama S, Shevlin M, Naber JR, Campeau LC, Pezzetta C, Carlone A, Cobley CJ, Bergens SH. Polycationic Rh–JosiPhos Polymers Supported on Phosphotungstic Acid/Al2O3 by Multiple Electrostatic Attractions. ACS Catal 2022. [DOI: 10.1021/acscatal.1c04983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Prabin Nepal
- Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton T6G 2G2, Alberta, Canada
| | - Suneth Kalapugama
- Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton T6G 2G2, Alberta, Canada
| | - Michael Shevlin
- Process Research and Development, MRL, Merck & Co., Inc., 126 East Lincoln Avenue, Rahway, New Jersey 07065, United States
| | - John R. Naber
- JRN - Process Research and Development, MRL, Merck & Co., Inc., 2000 Galloping Hill Rd, Kenilworth, New Jersey 07033, United States
| | - Louis-Charles Campeau
- Process Research and Development, MRL, Merck & Co., Inc., 126 East Lincoln Avenue, Rahway, New Jersey 07065, United States
| | - Cristofer Pezzetta
- Dr. Reddy’s Laboratories (EU), 410 Science Park, Milton Road, Cambridge CB4 0PE, United Kingdom
| | - Armando Carlone
- Dr. Reddy’s Laboratories (EU), 410 Science Park, Milton Road, Cambridge CB4 0PE, United Kingdom
- Department of Physical and Chemical Sciences, Università degli Studi dell’Aquila, Via Vetoio, 67100 L’Aquila, Italy
| | - Christopher J. Cobley
- Dr. Reddy’s Laboratories (EU), 410 Science Park, Milton Road, Cambridge CB4 0PE, United Kingdom
| | - Steven H. Bergens
- Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton T6G 2G2, Alberta, Canada
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Abd El Sater M, Mellah M, Dragoe D, Kolodziej E, Jaber N, Schulz E. Chiral Chromium Salen@rGO as Multipurpose and Recyclable Heterogeneous Catalyst. Chemistry 2021; 27:9454-9460. [PMID: 33856725 DOI: 10.1002/chem.202101003] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Indexed: 11/07/2022]
Abstract
The first immobilization of a pyrene-tagged chromium salen complex through π-π noncovalent interactions on reduced graphene oxide (rGO) is described. A very robust supported catalytic system is obtained to promote asymmetric catalysis in repeated cycles, without loss of activity or enantioselectivity. This specific behavior was demonstrated in two different catalytic reactions (up to ten reuses) promoted by chromium salen complexes, the cyclohexene oxide ring-opening reaction and the hetero-Diels-Alder cycloaddition between various aldehydes and Danishefsky's diene. Furthermore, the chiral chromium salen@rGO has been found to be compatible with a multi-substrate type use, in which the structure of the substrate involved is modified each time the catalyst is reused.
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Affiliation(s)
- Mariam Abd El Sater
- Equipe de Catalyse Moléculaire, Université Paris Saclay, Institut de Chimie Moléculaire et des Matériaux d'Orsay, Bâtiment 420, 91405, Orsay Cedex, France.,Laboratoire de Chimie Médicinale et des Produits Naturels, Université Libanaise, Faculté des Sciences (I) et PRASE-EDST, postcode is missing, Hadath, Beyrouth, Lebanon
| | - Mohamed Mellah
- Equipe de Catalyse Moléculaire, Université Paris Saclay, Institut de Chimie Moléculaire et des Matériaux d'Orsay, Bâtiment 420, 91405, Orsay Cedex, France
| | - Diana Dragoe
- Equipe de Catalyse Moléculaire, Université Paris Saclay, Institut de Chimie Moléculaire et des Matériaux d'Orsay, Bâtiment 420, 91405, Orsay Cedex, France
| | - Emilie Kolodziej
- Equipe de Catalyse Moléculaire, Université Paris Saclay, Institut de Chimie Moléculaire et des Matériaux d'Orsay, Bâtiment 420, 91405, Orsay Cedex, France
| | - Nada Jaber
- Laboratoire de Chimie Médicinale et des Produits Naturels, Université Libanaise, Faculté des Sciences (I) et PRASE-EDST, postcode is missing, Hadath, Beyrouth, Lebanon
| | - Emmanuelle Schulz
- Equipe de Catalyse Moléculaire, Université Paris Saclay, Institut de Chimie Moléculaire et des Matériaux d'Orsay, Bâtiment 420, 91405, Orsay Cedex, France
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Byrne JP, Musembi P, Albrecht M. Carbohydrate-functionalized N-heterocyclic carbene Ru(ii) complexes: synthesis, characterization and catalytic transfer hydrogenation activity. Dalton Trans 2019; 48:11838-11847. [DOI: 10.1039/c9dt02614b] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Triazolylidene NHCs decorated with a carbohydrate wingtip group were complexed to a ruthenium(ii) center. Deprotection of the carbohydrate in the metal complex affords a carbohydrate–NHC hybrid system for use as a transfer hydrogenation catalyst.
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Affiliation(s)
- Joseph P. Byrne
- Department of Chemistry and Biochemistry
- University of Bern
- 3012 Bern
- Switzerland
| | - Pauline Musembi
- Department of Chemistry and Biochemistry
- University of Bern
- 3012 Bern
- Switzerland
| | - Martin Albrecht
- Department of Chemistry and Biochemistry
- University of Bern
- 3012 Bern
- Switzerland
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