1
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Yuan Y, Zhang S, Duan K, Xu Y, Guo K, Chen C, Chaemchuen S, Cao D, Verpoort F. Multifunctional Biomass-Based Ionic Liquids/CuCl-Catalyzed CO 2-Promoted Hydration of Propargylic Alcohols: A Green Synthesis of α-Hydroxy Ketones. Int J Mol Sci 2024; 25:1937. [PMID: 38339215 PMCID: PMC10856482 DOI: 10.3390/ijms25031937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 01/31/2024] [Accepted: 02/03/2024] [Indexed: 02/12/2024] Open
Abstract
α-Hydroxy ketones are a class of vital organic skeletons that generally exist in a variety of natural products and high-value chemicals. However, the traditional synthetic route for their production involves toxic Hg salts and corrosive H2SO4 as catalysts, resulting in harsh conditions and the undesired side reaction of Meyer-Schuster rearrangement. In this study, CO2-promoted hydration of propargylic alcohols was achieved for the synthesis of various α-hydroxy ketones. Notably, this process was catalyzed using an environmentally friendly and cost-effective biomass-based ionic liquids/CuCl system, which effectively eliminated the side reaction. The ionic liquids utilized in this system are derived from natural biomass materials, which exhibited recyclability and catalytic activity under 1 bar of CO2 pressure without volatile organic solvents or additives. Evaluation of the green metrics revealed the superiority of this CuCl/ionic liquid system in terms of environmental sustainability. Further mechanistic investigation attributed the excellent performance to the ionic liquid component, which exhibited multifunctionality in activating substrates, CO2 and the Cu component.
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Affiliation(s)
- Ye Yuan
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China; (Y.Y.); (C.C.); (S.C.); (D.C.)
- School of Material Science and Engineering, Wuhan University of Technology, Wuhan 430070, China; (S.Z.); (K.D.); (Y.X.); (K.G.)
| | - Siqi Zhang
- School of Material Science and Engineering, Wuhan University of Technology, Wuhan 430070, China; (S.Z.); (K.D.); (Y.X.); (K.G.)
| | - Kang Duan
- School of Material Science and Engineering, Wuhan University of Technology, Wuhan 430070, China; (S.Z.); (K.D.); (Y.X.); (K.G.)
| | - Yong Xu
- School of Material Science and Engineering, Wuhan University of Technology, Wuhan 430070, China; (S.Z.); (K.D.); (Y.X.); (K.G.)
| | - Kaixuan Guo
- School of Material Science and Engineering, Wuhan University of Technology, Wuhan 430070, China; (S.Z.); (K.D.); (Y.X.); (K.G.)
| | - Cheng Chen
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China; (Y.Y.); (C.C.); (S.C.); (D.C.)
- School of Material Science and Engineering, Wuhan University of Technology, Wuhan 430070, China; (S.Z.); (K.D.); (Y.X.); (K.G.)
| | - Somboon Chaemchuen
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China; (Y.Y.); (C.C.); (S.C.); (D.C.)
- School of Material Science and Engineering, Wuhan University of Technology, Wuhan 430070, China; (S.Z.); (K.D.); (Y.X.); (K.G.)
| | - Dongfeng Cao
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China; (Y.Y.); (C.C.); (S.C.); (D.C.)
- School of Material Science and Engineering, Wuhan University of Technology, Wuhan 430070, China; (S.Z.); (K.D.); (Y.X.); (K.G.)
| | - Francis Verpoort
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China; (Y.Y.); (C.C.); (S.C.); (D.C.)
- School of Material Science and Engineering, Wuhan University of Technology, Wuhan 430070, China; (S.Z.); (K.D.); (Y.X.); (K.G.)
- Research School of Chemical and Biomedical Technologies, National Research Tomsk Polytechnic University, Lenin Avenue 30, 634050 Tomsk, Russia
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2
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Shan C, Li R, Wang X. Efficient construction of a β-naphthol library under continuous flow conditions. RSC Adv 2024; 14:2673-2677. [PMID: 38226147 PMCID: PMC10789443 DOI: 10.1039/d3ra08660g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Accepted: 01/04/2024] [Indexed: 01/17/2024] Open
Abstract
A β-naphthol library has been efficiently constructed utilizing a mild continuous flow procedure, relying on a tandem Friedel-Crafts reaction and starting from readily available arylacetyl chloride and alkynes. Multiple functionalized β-naphthols can be acquired within 160 s in generally high yields (up to 83%). Using an electron-rich phenylacetyl chloride derivative (4-OH- or 4-MeO-) provides spirofused triene dione as the primary product. A scale-up preparation affords a throughput of 4.70 g h-1, indicating potential large-scale application. Herein, we present a rapid, reliable, and scalable method to obtain various β-naphthols in the compound library.
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Affiliation(s)
- Chao Shan
- Heze University Heze Shandong Province 274015 China
| | - Ranran Li
- Heze University Heze Shandong Province 274015 China
| | - Xinchao Wang
- Heze University Heze Shandong Province 274015 China
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3
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A green and recyclable CuSO4·5H2O/ionic liquid catalytic system for the CO2-promoted hydration of propargyl alcohols: an efficient assembly of α-hydroxy ketones. J Catal 2022. [DOI: 10.1016/j.jcat.2021.11.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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4
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Baire B, Santhi J. Ag(I)-Promoted homo-dimerization of 2-(alk-2-yn-1-onyl)-1-alkynylbenzenes via a [4 + 2] cycloaddition of benzopyrylium ions: access to structurally unique naphthalenes. Org Biomol Chem 2021; 20:247-251. [PMID: 34904139 DOI: 10.1039/d1ob02229f] [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
Herein we report a Ag(I)-promoted homo-dimerization of 2-(alk-2-yn-1-onyl)-1-alkynylbenzenes for the synthesis of structurally novel and functionalized naphthalene derivatives. This transformation exhibits a broad scope for the alkyl as well as aryl groups present on alkynes. Observations made from control experiments suggest the possible mechanism as (i) the homo-dimerization of the in situ generated benzopyrylium ion intermediates through a head-tail [4 + 2] cycloaddition, followed by (ii) the competitive ring-opening vs. decarbonylative aromatization of the adduct to give formylated and deformylated naphthalenes, respectively.
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Affiliation(s)
- Beeraiah Baire
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, Tamil Nadu, 600036, India.
| | - Jampani Santhi
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, Tamil Nadu, 600036, India.
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5
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Othmanm MO, Abdallahi SM, Ewies EF, El-Shazly M, Elemine BO, Hadou A, Moncol J, Lawson AM, Daich A, Othman M. Autotandem Catalysis: Inexpensive and Green Access to Functionalized Ketones by Intermolecular Iron-Catalyzed Amidoalkynylation/Hydration Cascade Reaction via N-Acyliminium Ion Chemistry. Chemistry 2021; 27:15440-15449. [PMID: 34346129 DOI: 10.1002/chem.202102357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Indexed: 11/05/2022]
Abstract
Iron-based catalysts were applied in cascade-type reactions for the synthesis of different carbonyl compounds. The reactions proceeded by a new iron-catalyzed cascade of alkynylation/hydration by using both the σ- and π-Lewis acid properties of iron salts. The alkynylation reactions of several endo and exocyclic acetoxylactams were achieved with three different catalysts including FeCl 3 .6H 2 O, FeCl 3 , and Fe(OTf) 3 showing the efficiency of σ-Lewis acidity of iron (III) salts in catalyzing the alkynylation reaction. We also demonstrated that the reaction sequence could be shortened by the direct use of hydroxylactams, leading to an environmentally friendly protocol, avoiding the need to perform unnecessary lengthy steps. A combination of the hard/soft iron Lewis acid properties was then used to implement an unprecedented tandem intermolecular alkynylation/intramolecular hydration sequence allowing expedient access to a new carbonyl structures from trivial materials.
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Affiliation(s)
- Mohamed Othman Othmanm
- University of le Havre, Unit� de Recherche en Chimie Organique et Macromol�culaire URCOM, 25, Rue Philippe Lebon, BP 540, 76058, Le Havre, FRANCE
| | | | | | | | | | | | - Ján Moncol
- Slovak University of Technology Faculty of Chemical and Food Technology: Slovenska Technicka Univerzita v Bratislave Fakulta chemickej a potravinarskej technologie, Chemistry, SLOVAKIA
| | | | | | - Mohamed Othman
- Universite du Havre, URCOM, 25, Rue Philippe Lebon, BP 540, 76058, Le Havre, FRANCE
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6
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Thongsornkleeb C, Tummatorn J, Ruchirawat S. Utilization of ortho-alkynylarylcarbonyl derivatives for creating structurally diverse chemical compounds. Org Biomol Chem 2021; 19:5982-5998. [PMID: 34165112 DOI: 10.1039/d1ob00629k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
ortho-Alkynylarylcarbonyl compounds, including ketones, aldehydes, carboxylic acids, carboxylate esters and amides, have served as useful building blocks for synthetic chemists to prepare numerous classes of important molecules. Various synthetic conversions starting from ortho-alkynylarylcarbonyl precursors are made possible by their unique and enabling structures embedded with reactive carbonyl and alkyne functional groups. These functional groups can be converted directly and independently to other compounds by several reactions. This review highlights the use of these compounds as common precursors for the divergent synthesis of valuable molecules. Moreover, these ortho-alkynylarylcarbonyl compounds can be decorated with other functional group tethers which can lead to an even greater diversity of molecular scaffolds.
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Affiliation(s)
- Charnsak Thongsornkleeb
- Program on Chemical Sciences, Chulabhorn Graduate Institute, Center of Excellence on Environmental Health and Toxicology (EHT), Ministry of Education, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand and Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand.
| | - Jumreang Tummatorn
- Program on Chemical Sciences, Chulabhorn Graduate Institute, Center of Excellence on Environmental Health and Toxicology (EHT), Ministry of Education, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand and Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand.
| | - Somsak Ruchirawat
- Program on Chemical Sciences, Chulabhorn Graduate Institute, Center of Excellence on Environmental Health and Toxicology (EHT), Ministry of Education, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand and Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand.
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7
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Mareev AV, Andreev MV, Ushakov IA. Base‐Catalyzed Hydration of Silicon‐Containing Activated Alkynes: The Effect of Substituents at the Triple Bond. ChemistrySelect 2020. [DOI: 10.1002/slct.202002410] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Alexander V. Mareev
- A. E. Favorsky Irkutsk Institute of Chemistry Siberian Branch of the Russian Academy of Sciences 664033 Favorsky st. 1, Irkutsk Russia
| | - Mikhail V. Andreev
- A. E. Favorsky Irkutsk Institute of Chemistry Siberian Branch of the Russian Academy of Sciences 664033 Favorsky st. 1, Irkutsk Russia
| | - Igor A. Ushakov
- A. E. Favorsky Irkutsk Institute of Chemistry Siberian Branch of the Russian Academy of Sciences 664033 Favorsky st. 1, Irkutsk Russia
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8
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Felicetti T, Mangiaterra G, Cannalire R, Cedraro N, Pietrella D, Astolfi A, Massari S, Tabarrini O, Manfroni G, Barreca ML, Cecchetti V, Biavasco F, Sabatini S. C-2 phenyl replacements to obtain potent quinoline-based Staphylococcus aureus NorA inhibitors. J Enzyme Inhib Med Chem 2020; 35:584-597. [PMID: 31992093 PMCID: PMC7034129 DOI: 10.1080/14756366.2020.1719083] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
NorA is the most studied efflux pump of Staphylococcus aureus and is responsible for high level resistance towards fluoroquinolone drugs. Although along the years many NorA efflux pump inhibitors (EPIs) have been reported, poor information is available about structure-activity relationship (SAR) around their nuclei and reliability of data supported by robust assays proving NorA inhibition. In this regard, we focussed efforts on the 2-phenylquinoline as a promising chemotype to develop potent NorA EPIs. Herein, we report SAR studies about the introduction of different aryl moieties on the quinoline C-2 position. The new derivative 37a showed an improved EPI activity (16-fold) with respect to the starting hit 1. Moreover, compound 37a exhibited a high potential in time-kill curves when combined with ciprofloxacin against SA-1199B (norA+). Also, 37a exhibited poor non-specific effect on bacterial membrane polarisation and showed an improvement in terms of “selectivity index” in comparison to 1.
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Affiliation(s)
- Tommaso Felicetti
- Department of Pharmaceutical Sciences, Chemistry and Technology of the Drug Section, Università degli Studi di Perugia, Perugia, Italy
| | - Gianmarco Mangiaterra
- Department of Life and Environmental Sciences, Università Politecnica delle Marche, Ancona, Italy
| | - Rolando Cannalire
- Department of Pharmaceutical Sciences, Chemistry and Technology of the Drug Section, Università degli Studi di Perugia, Perugia, Italy
| | - Nicholas Cedraro
- Department of Life and Environmental Sciences, Università Politecnica delle Marche, Ancona, Italy
| | - Donatella Pietrella
- Department of Pharmaceutical Sciences, Biochemical Sciences and Health Section, Università degli Studi di Perugia, Perugia, Italy
| | - Andrea Astolfi
- Department of Pharmaceutical Sciences, Chemistry and Technology of the Drug Section, Università degli Studi di Perugia, Perugia, Italy
| | - Serena Massari
- Department of Pharmaceutical Sciences, Chemistry and Technology of the Drug Section, Università degli Studi di Perugia, Perugia, Italy
| | - Oriana Tabarrini
- Department of Pharmaceutical Sciences, Chemistry and Technology of the Drug Section, Università degli Studi di Perugia, Perugia, Italy
| | - Giuseppe Manfroni
- Department of Pharmaceutical Sciences, Chemistry and Technology of the Drug Section, Università degli Studi di Perugia, Perugia, Italy
| | - Maria Letizia Barreca
- Department of Pharmaceutical Sciences, Chemistry and Technology of the Drug Section, Università degli Studi di Perugia, Perugia, Italy
| | - Violetta Cecchetti
- Department of Pharmaceutical Sciences, Chemistry and Technology of the Drug Section, Università degli Studi di Perugia, Perugia, Italy
| | - Francesca Biavasco
- Department of Life and Environmental Sciences, Università Politecnica delle Marche, Ancona, Italy
| | - Stefano Sabatini
- Department of Pharmaceutical Sciences, Chemistry and Technology of the Drug Section, Università degli Studi di Perugia, Perugia, Italy
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9
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Santhi J, Baire B. An Unusual Conversion of 2‐(Alkynonyl)Alkynylbenzenes to Isocoumarins by a Retro‐Favorskii‐like Degradation. Chem Asian J 2019; 14:3161-3165. [DOI: 10.1002/asia.201900745] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 07/23/2019] [Indexed: 12/25/2022]
Affiliation(s)
- Jampani Santhi
- Department of ChemistryIndian Institute of Technology Madras Chennai Tamilnadu 600036 India
| | - Beeraiah Baire
- Department of ChemistryIndian Institute of Technology Madras Chennai Tamilnadu 600036 India
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10
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Sadhukhan S, Baire B. Formal Halo‐Meyer–Schuster Rearrangement of Propargylic Acetates through a Novel Intermediate and an Unexampled Mechanistic Pathway. Chemistry 2019; 25:9816-9820. [DOI: 10.1002/chem.201901856] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 05/29/2019] [Indexed: 01/02/2023]
Affiliation(s)
- Santu Sadhukhan
- Department of ChemistryIndian Institute of Technology Madras Chennai Tamilnadu 600036 India
| | - Beeraiah Baire
- Department of ChemistryIndian Institute of Technology Madras Chennai Tamilnadu 600036 India
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11
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Chen X, Martini S, Michelet V. A Mild and Regioselective Synthesis of α‐Fluoroketones
via
Gold and Selectfluor Partnership. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900268] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Xi Chen
- University Côte d'Azur – University Nice Sophia Antipolis, Institut de Chimie de Nice, UMR 7272 CNRS, Valrose ParkFaculty of Sciences 06108 Nice Cedex 2 France
| | - Sophie Martini
- University Côte d'Azur – University Nice Sophia Antipolis, Institut de Chimie de Nice, UMR 7272 CNRS, Valrose ParkFaculty of Sciences 06108 Nice Cedex 2 France
| | - Véronique Michelet
- University Côte d'Azur – University Nice Sophia Antipolis, Institut de Chimie de Nice, UMR 7272 CNRS, Valrose ParkFaculty of Sciences 06108 Nice Cedex 2 France
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12
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Affiliation(s)
- Giulia Oss
- School of Chemistry University of New South Wales Sydney Australia
| | - Junming Ho
- School of Chemistry University of New South Wales Sydney Australia
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13
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Zhang C, Chang S, Dong S, Qiu L, Xu X. Acid-Promoted Bicyclization of Diaryl Alkynes: Synthesis of 2H-Indazoles with in Situ Generated Diazonium Salt as Nitrogen Source. J Org Chem 2018; 83:9125-9136. [DOI: 10.1021/acs.joc.8b01199] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Cheng Zhang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Sailan Chang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Shanliang Dong
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Lihua Qiu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Xinfang Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
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14
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Nimnual P, Norseeda K, Akkachairin B, Tummatorn J, Laohapaisan P, Supantanapong N, Chuangsoongnern P, Thongsornkleeb C, Sittihan S, Ruchirawat S, Rodphon W. Synthesis of β‐Naphthols and Naphthofuranones from
ortho
‐Alkynylarylketones via Sequential AgTFA‐Catalyzed Ketonization–Intramolecular Aldol Condensation: A Total Synthesis of Negundin A. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800025] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Phongprapan Nimnual
- Program on Chemical BiologyChulabhorn Graduate Institute, Center of Excellence on Environmental Health and Toxicology (EHT), Ministry of Education 54 Kamphaeng Phet 6, Laksi Bangkok 10210 Thailand
| | - Krissada Norseeda
- Program on Chemical BiologyChulabhorn Graduate Institute, Center of Excellence on Environmental Health and Toxicology (EHT), Ministry of Education 54 Kamphaeng Phet 6, Laksi Bangkok 10210 Thailand
| | - Bhornrawin Akkachairin
- Program on Chemical BiologyChulabhorn Graduate Institute, Center of Excellence on Environmental Health and Toxicology (EHT), Ministry of Education 54 Kamphaeng Phet 6, Laksi Bangkok 10210 Thailand
| | - Jumreang Tummatorn
- Program on Chemical BiologyChulabhorn Graduate Institute, Center of Excellence on Environmental Health and Toxicology (EHT), Ministry of Education 54 Kamphaeng Phet 6, Laksi Bangkok 10210 Thailand
- Laboratory of Medicinal ChemistryChulabhorn Research Institute 54 Kamphaeng Phet 6, Laksi Bangkok 10210 Thailand
| | - Pavitra Laohapaisan
- Program on Chemical BiologyChulabhorn Graduate Institute, Center of Excellence on Environmental Health and Toxicology (EHT), Ministry of Education 54 Kamphaeng Phet 6, Laksi Bangkok 10210 Thailand
| | - Nantamon Supantanapong
- Program on Chemical BiologyChulabhorn Graduate Institute, Center of Excellence on Environmental Health and Toxicology (EHT), Ministry of Education 54 Kamphaeng Phet 6, Laksi Bangkok 10210 Thailand
| | - Pennapa Chuangsoongnern
- Laboratory of Medicinal ChemistryChulabhorn Research Institute 54 Kamphaeng Phet 6, Laksi Bangkok 10210 Thailand
| | - Charnsak Thongsornkleeb
- Program on Chemical BiologyChulabhorn Graduate Institute, Center of Excellence on Environmental Health and Toxicology (EHT), Ministry of Education 54 Kamphaeng Phet 6, Laksi Bangkok 10210 Thailand
- Laboratory of Organic SynthesisChulabhorn Research Institute 54 Kamphaeng Phet 6, Laksi Bangkok 10210 Thailand
| | - Satapanawat Sittihan
- Program on Chemical BiologyChulabhorn Graduate Institute, Center of Excellence on Environmental Health and Toxicology (EHT), Ministry of Education 54 Kamphaeng Phet 6, Laksi Bangkok 10210 Thailand
| | - Somsak Ruchirawat
- Program on Chemical BiologyChulabhorn Graduate Institute, Center of Excellence on Environmental Health and Toxicology (EHT), Ministry of Education 54 Kamphaeng Phet 6, Laksi Bangkok 10210 Thailand
- Laboratory of Medicinal ChemistryChulabhorn Research Institute 54 Kamphaeng Phet 6, Laksi Bangkok 10210 Thailand
| | - Warabhorn Rodphon
- Laboratory of Medicinal ChemistryChulabhorn Research Institute 54 Kamphaeng Phet 6, Laksi Bangkok 10210 Thailand
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15
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Tharra P, Baire B. Regioselective Cyclization of (Indol-3-yl)pentyn-3-ols as an Approach to (Tetrahydro)carbazoles. Org Lett 2018; 20:1118-1121. [DOI: 10.1021/acs.orglett.8b00042] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Prabhakararao Tharra
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, Tamilnadu, India-600036
| | - Beeraiah Baire
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, Tamilnadu, India-600036
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16
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Chinta BS, Sanapa H, Vasikarla KP, Baire B. Highly regioselective, electrophile induced cyclizations of 2-(prop-1-ynyl)benzamides. Org Biomol Chem 2018; 16:3947-3951. [DOI: 10.1039/c8ob00434j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
We report an electrophile promoted, highly regioselective (∼100%) synthesis of 5-membered haloimidiates from 2-(1-alkynyl)benzamides under metal free conditions.
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Affiliation(s)
| | | | | | - Beeraiah Baire
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai-600036
- India
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17
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Bao M, Lu W, Cai Y, Qiu L, Xu X. Gold(I)-Catalyzed Cyclization/Carbonylation Cascade Reaction of 1,6-Diynes: An Access to β,γ-Unsaturated Ketones. J Org Chem 2017; 82:13386-13395. [PMID: 29161043 DOI: 10.1021/acs.joc.7b02461] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A gold-catalyzed cyclization/carbonylation cascade reaction of 1,6-diynes is reported. The reaction goes through 6-exo-dig and 6-endo-dig cyclizations in sequence, followed by hydration to provide the β,γ-unsaturated ketones with moderate to high yields under mild reaction conditions. This is the first example of intercepting the postulated 1,3-oxazine vinylgold intermediate with another pendant alkyne, which not only verifies the proposed mechanism but also provides the ketone products with cyclized 1,2,3,6-tetrahydropyridine or 3,6-dihydro-2H-pyran frameworks from corresponding diynes.
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Affiliation(s)
- Ming Bao
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Suzhou 215123, China
| | - Wei Lu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Suzhou 215123, China
| | - Yanping Cai
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Suzhou 215123, China
| | - Lihua Qiu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Suzhou 215123, China
| | - Xinfang Xu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Suzhou 215123, China.,State Key Laboratory of Elemento-Organic Chemistry, Nankai University , Tianjin 300071, China
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18
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Sadhukhan S, Baire B. An Expeditious Approach to α,α-Dihalo-α′-acetoxyketones from Propargylic Acetates. ChemistrySelect 2017. [DOI: 10.1002/slct.201701398] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Santu Sadhukhan
- Department of Chemistry; Indian Institute of Technology Madras; Chennai- 600036 INDIA
| | - Beeraiah Baire
- Department of Chemistry; Indian Institute of Technology Madras; Chennai- 600036 INDIA
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Tharra P, Baire B. A coherent study on the Z-enoate assisted Meyer–Schuster rearrangement. Org Biomol Chem 2017. [DOI: 10.1039/c7ob01221g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The impact of temperature, solvent, concentration of the counter ion and the nature of the arene nucleophile on the Z-enoate assisted Meyer–Schuster rearrangement of propargylic alcohols was studied.
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Affiliation(s)
| | - Beeraiah Baire
- Department of Chemistry
- Institute of Technology Madras
- Chennai-600036
- India
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