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Ganaie BA, Ara T, Banday JA, Bhat BA. BF 3·OEt 2 Mediated Ethylation of Phenols: A New Protection Group Strategy. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2021.1937237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
| | - Tabassum Ara
- National Institute of Technology, Srinagar, Srinagar, India
| | | | - Bilal A. Bhat
- CSIR-Natural Products Medicinal Chemistry Division, Indian Institute of Integrative Medicine Sanatnagar, Srinagar, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
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Lui YW, Chan B, Lui MY. Methylation with Dimethyl Carbonate/Dimethyl Sulfide Mixtures: An Integrated Process without Addition of Acid/Base and Formation of Residual Salts. CHEMSUSCHEM 2022; 15:e202102538. [PMID: 34907650 DOI: 10.1002/cssc.202102538] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 12/15/2021] [Indexed: 06/14/2023]
Abstract
Dimethyl sulfide, a major byproduct of the Kraft pulping process, was used as an inexpensive and sustainable catalyst/co-reagent (methyl donor) for various methylations with dimethyl carbonate (as both reagent and solvent), which afforded excellent yields of O-methylated phenols and benzoic acids, and mono-C-methylated arylacetonitriles. Furthermore, these products could be isolated using a remarkably straightforward workup and purification procedure, realized by dimethyl sulfide's neutral and distillable nature and the absence of residual salts. The likely mechanisms of these methylations were elucidated using experimental and theoretical methods, which revealed that the key step involves the generation of a highly reactive trimethylsulfonium methylcarbonate intermediate. The phenol methylation process represents a rare example of a Williamson-type reaction that occurs without the addition of a Brønsted base.
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Affiliation(s)
- Yuen Wai Lui
- Department of Chemistry, Hong Kong Baptist University Kowloon Tong, Hong Kong, P. R. China
| | - Bun Chan
- Graduate School of Engineering, Nagasaki University, Bunkyo 1-14, Nagasaki, 852-8521, Japan
| | - Matthew Y Lui
- Department of Chemistry, Hong Kong Baptist University Kowloon Tong, Hong Kong, P. R. China
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3
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Petitpoisson L, Pichette A, Alsarraf J. Towards better syntheses of partially methylated carbohydrates? Org Chem Front 2022. [DOI: 10.1039/d2qo00893a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We give an overview of the reported synthetic strategies towards partially methylated glycosides and discuss how better protocols could stem from catalytic site-selective transformations of carbohydrates and cleaner methylation reagents.
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Affiliation(s)
- Lucas Petitpoisson
- Centre de recherche sur la boréalie (CREB), Laboratoire d'analyse et de séparation des essences végétales (LASEVE), Université du Québec à Chicoutimi, 555 boulevard de l'Université, Chicoutimi G7H 2B1, Québec, Canada
| | - André Pichette
- Centre de recherche sur la boréalie (CREB), Laboratoire d'analyse et de séparation des essences végétales (LASEVE), Université du Québec à Chicoutimi, 555 boulevard de l'Université, Chicoutimi G7H 2B1, Québec, Canada
| | - Jérôme Alsarraf
- Centre de recherche sur la boréalie (CREB), Laboratoire d'analyse et de séparation des essences végétales (LASEVE), Université du Québec à Chicoutimi, 555 boulevard de l'Université, Chicoutimi G7H 2B1, Québec, Canada
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Selvakumar J, Simpson SM, Zurek E, Arumugam K. An electrochemically controlled release of NHCs using iron bis(dithiolene) N-heterocyclic carbene complexes. Inorg Chem Front 2021. [DOI: 10.1039/d0qi00638f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A series of five coordinated [Fe(NHC)(S2C2R2)2] complexes were isolated and subjected to electrochemical reduction for the facile release of NHCs in the catalytic media.
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Affiliation(s)
| | - Scott M. Simpson
- Department of Chemistry
- St. Bonaventure University
- St. Bonaventure
- USA
| | - Eva Zurek
- Department of Chemistry
- State University of New York at Buffalo
- Buffalo
- USA
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Wang X, Wang R, Zheng Z. Light assisted O-alkylation of phenols to ethers using layered double oxides catalyst under green and mild conditions. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112695] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Delaude L. The Chemistry of Azolium‐Carboxylate Zwitterions and Related Compounds: a Survey of the Years 2009–2020. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000639] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Lionel Delaude
- Laboratory of CatalysisMolSys Research UnitInstitut de Chimie Organique (B6a)Université de Liège Allée du six Août 13 4000 Liège Belgium
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Arza CR, Wang P, Linares‐Pastén J, Zhang B. Synthesis, thermal, rheological characteristics, and enzymatic degradation of aliphatic polyesters with lignin‐based aromatic pendant groups. ACTA ACUST UNITED AC 2019. [DOI: 10.1002/pola.29534] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Carlos R. Arza
- Centre of Analysis and Synthesis, Department of ChemistryLund University P.O. Box 124, SE‐22100 Lund Sweden
| | - Ping Wang
- Centre of Analysis and Synthesis, Department of ChemistryLund University P.O. Box 124, SE‐22100 Lund Sweden
| | - Javier Linares‐Pastén
- Division of Biotechnology, Department of ChemistryLund University P.O.Box 124, 22100 Lund Sweden
| | - Baozhong Zhang
- Centre of Analysis and Synthesis, Department of ChemistryLund University P.O. Box 124, SE‐22100 Lund Sweden
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Jumbam ND, Maganga Y, Masamba W, Mbunye NI, Mgoqi E, Mtwa S. A New Alkylation of Aryl Alcohols by Boron Trifluoride Etherate. Molecules 2019; 24:molecules24203720. [PMID: 31623100 PMCID: PMC6833367 DOI: 10.3390/molecules24203720] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 10/07/2019] [Accepted: 10/09/2019] [Indexed: 11/16/2022] Open
Abstract
The ethylation of aryl alcohols by an ethyl moiety of boron trifluoride etherate is described. The reaction proceeded cleanly and afforded good yields of the corresponding aryl ethyl ethers. It tolerated the presence of functional groups such as aryl, alkyl, halogens, nitro, nitrile, and amino. However, the presence of amino or nitro groups ortho to a hydroxyl group of an aryl compound drastically reduced the yields of the anticipated products due to the chelation of the aforementioned functional groups with boron trifluoride etherate. A nitrogen atom in the aromatic ring system, as exemplified by hydroxypyridine and 8-hydroxyquinoline, completely inhibited the reaction. Resorcinol, hydroquinone, and aryl alcohols with aldehyde functions decomposed under the reaction conditions.
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Affiliation(s)
- Ndze Denis Jumbam
- Department of Chemical and Physical Sciences, Faculty of Natural Sciences, Walter Sisulu University, Nelson Mandela Drive, Mthatha 5117, South Africa.
| | - Yamkela Maganga
- Department of Chemical and Physical Sciences, Faculty of Natural Sciences, Walter Sisulu University, Nelson Mandela Drive, Mthatha 5117, South Africa.
| | - Wayiza Masamba
- Department of Chemical and Physical Sciences, Faculty of Natural Sciences, Walter Sisulu University, Nelson Mandela Drive, Mthatha 5117, South Africa.
| | - Nomthandazo I Mbunye
- Department of Chemical and Physical Sciences, Faculty of Natural Sciences, Walter Sisulu University, Nelson Mandela Drive, Mthatha 5117, South Africa.
| | - Esethu Mgoqi
- Department of Chemical and Physical Sciences, Faculty of Natural Sciences, Walter Sisulu University, Nelson Mandela Drive, Mthatha 5117, South Africa.
| | - Sphumusa Mtwa
- Department of Chemical and Physical Sciences, Faculty of Natural Sciences, Walter Sisulu University, Nelson Mandela Drive, Mthatha 5117, South Africa.
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Lui MY, Noè M, Masters AF, Maschmeyer T. Selective Catalytic Methylation of Phloroglucinol with Dimethyl Carbonate in the Presence of Heterogeneous Acids. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Matthew Y. Lui
- Laboratory of Advanced Catalysis for Sustainability; School of Chemistry F11; The University of Sydney; 2006 Sydney, NSW Australia
| | - Marco Noè
- Laboratory of Advanced Catalysis for Sustainability; School of Chemistry F11; The University of Sydney; 2006 Sydney, NSW Australia
| | - Anthony F. Masters
- Laboratory of Advanced Catalysis for Sustainability; School of Chemistry F11; The University of Sydney; 2006 Sydney, NSW Australia
| | - Thomas Maschmeyer
- Laboratory of Advanced Catalysis for Sustainability; School of Chemistry F11; The University of Sydney; 2006 Sydney, NSW Australia
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Molleti J, Yadav GD. Green Synthesis of Veratraldehyde Using Potassium Promoted Lanthanum–Magnesium Mixed Oxide Catalyst. Org Process Res Dev 2017. [DOI: 10.1021/acs.oprd.7b00127] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jayaram Molleti
- Department of Chemical Engineering, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga Mumbai-400 019, India
| | - Ganapati D. Yadav
- Department of Chemical Engineering, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga Mumbai-400 019, India
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