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Tomczyk I, Kalek M. Electrochemical Dearomatizing Methoxylation of Phenols and Naphthols: Synthetic and Computational Studies. Chemistry 2024; 30:e202303916. [PMID: 38315289 DOI: 10.1002/chem.202303916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 02/05/2024] [Accepted: 02/05/2024] [Indexed: 02/07/2024]
Abstract
The electrochemical oxidative dearomatizing methoxylation of phenols and naphthols was developed. It provides an alternative route for the preparation of methoxycyclohexadienones, important and versatile synthetic intermediates, that eliminates the need for stoichiometric high-energy chemical oxidants and generates hydrogen as a sole by-product. The reaction proceeds in a simple constant current mode, in an undivided cell, and it employs standardized instrumentation. A collection of methoxycyclohexadienones derived from various 2,4,6-tri-substituted phenols and 1-substituted-2-naphthols was obtained in moderate to excellent yields. These include a complex derivative of estrone, as well as methoxylated dearomatized 1,1'-bi-2-naphthols (BINOLs). The mechanism of the reaction was subject to profound investigations using density functional theory calculations. In particular, the reactivity of two key intermediates, phenoxyl radical and phenoxenium ion, was carefully examined. The obtained results shed light on the pathway leading to the desired product and rationalize experimentally observed selectivities regarding a side benzylic methoxylation and the preference for the functionalization at the para over the ortho position. They also uncover the structure-selectivity relationship, inversely correlating the steric bulk of the substrate with its propensity to undergo the side-reaction. Moreover, the loss of stereochemical information from enantiopure BINOL substrates during the reaction is rationalized by the computations.
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Affiliation(s)
- Ireneusz Tomczyk
- Centre of New Technologies, University of Warsaw, Banacha 2C, 02-097, Warsaw, Poland
| | - Marcin Kalek
- Centre of New Technologies, University of Warsaw, Banacha 2C, 02-097, Warsaw, Poland
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Thorat SS, Kontham R. Strategies for the synthesis of furo-pyranones and their application in the total synthesis of related natural products. Org Chem Front 2021. [DOI: 10.1039/d0qo01421d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The furo-pyranone framework is widely present in the molecular structure of various biologically potent natural products and un-natural small molecules, and it represents a valuable target in synthetic organic chemistry and medicinal chemistry.
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Affiliation(s)
- Sagar S. Thorat
- Organic Chemistry Division
- CSIR-National Chemical Laboratory
- Pune-411008
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Ravindar Kontham
- Organic Chemistry Division
- CSIR-National Chemical Laboratory
- Pune-411008
- India
- Academy of Scientific and Innovative Research (AcSIR)
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Yadav P, Pratap R, Ji Ram V. Natural and Synthetic Spirobutenolides and Spirobutyrolactones. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000259] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Pratik Yadav
- Department of Chemistry Kirori Mal College University of Delhi Delhi 110 007 India
| | - Ramendra Pratap
- Department of Chemistry University of Delhi Delhi 110 007 India
| | - Vishnu Ji Ram
- B-67, Eldeco Towne IIM road, PO-Diguria Lucknow-226020 Uttar Pradesh India
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Rinaldi A, Langé V, Scarpi D, Occhiato EG. One-Pot Access to 1,7a-Dihydro-1,3a-ethano-indene and 1,8a-Dihydro-1,3a-ethano-azulene Skeletons by a Sequential Gold(I)-Catalyzed Propargyl Claisen Rearrangement/Nazarov Cyclization/[4+2] Cycloaddition Reaction. J Org Chem 2020; 85:5078-5086. [PMID: 32192345 DOI: 10.1021/acs.joc.0c00088] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An efficient synthetic approach to the tricyclic 1,7a-dihydro-1,3a-ethano-indene and 1,8a-dihydro-1,3a-ethano-azulene skeletons from suitable propargyl vinyl ethers is based on a one-pot, multistep process entailing a gold(I)-catalyzed propargyl Claisen rearrangement/Nazarov cyclization, a [4+2] cycloaddition of the formed six- or seven-membered ring-fused cyclopentadiene system, and a final protection step for the easy isolation and purification of the products by chromatography.
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Affiliation(s)
- Antonia Rinaldi
- Dipartimento di Chimica "U. Schiff", Università degli Studi di Firenze, Via della Lastruccia 13, Sesto Fiorentino (FI) 50019, Italy
| | - Vittoria Langé
- Dipartimento di Chimica "U. Schiff", Università degli Studi di Firenze, Via della Lastruccia 13, Sesto Fiorentino (FI) 50019, Italy
| | - Dina Scarpi
- Dipartimento di Chimica "U. Schiff", Università degli Studi di Firenze, Via della Lastruccia 13, Sesto Fiorentino (FI) 50019, Italy
| | - Ernesto G Occhiato
- Dipartimento di Chimica "U. Schiff", Università degli Studi di Firenze, Via della Lastruccia 13, Sesto Fiorentino (FI) 50019, Italy
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Sanjuán AM, García-García P, Fernández-Rodríguez MA, Sanz R. Enantioselective Synthesis of Cyclopentadienes by Gold(I)- Catalyzed Cyclization of 1,3-Dien-5-ynes. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300448] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Agopcan S, Çelebi-Ölçüm N, Üçışık MN, Sanyal A, Aviyente V. Origins of the diastereoselectivity in hydrogen bonding directed Diels–Alder reactions of chiral dienes with achiral dienophiles: a computational study. Org Biomol Chem 2011; 9:8079-88. [DOI: 10.1039/c1ob06285a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Jones AL, Liu X, Snyder JK. Enantioselective syntheses of candenatenins B and C using a chiral anthracene auxiliary. Tetrahedron Lett 2010; 51:1091-1094. [PMID: 20305722 DOI: 10.1016/j.tetlet.2009.12.108] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
An asymmetric synthesis of two anticancer natural products, candenatenins B and C, is described, leading to a revision of the originally assigned stereochemistry. The synthesis follows a Diels-Alder/retro-Diels Alder strategy using a chiral anthracene auxiliary to access both targets with 90% ee. The inherent structural qualities of the auxiliary allow for both regio- and diastereoselective transformations.
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Affiliation(s)
- Amanda L Jones
- Center for Chemical Methodology and Library Development and the Department of Chemistry, Boston University, 590 Commonwealth Ave., Boston, Massachusetts, 02215
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Yakushiji F, Maddaluno J, Yoshida M, Shishido K. Diastereoselective construction of substituted tetrahydropyrans using an intramolecular oxy-Michael strategy. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.01.084] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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9
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Benito-López F, Egberink RJ, Reinhoudt DN, Verboom W. High pressure in organic chemistry on the way to miniaturization. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.07.108] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Loughlin WA, Jenkins ID, Henderson LC, Campitelli MR, Healy PC. Total Synthesis of (±)-Hyphodermins A and D. J Org Chem 2008; 73:3435-40. [DOI: 10.1021/jo800227p] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wendy A. Loughlin
- School of Biomolecular and Physical Sciences, Griffith University, Brisbane, QLD, 4111, Australia, and Eskitis Institute for Cell and Molecular Therapies, Griffith University, Brisbane, QLD, 4111, Australia
| | - Ian D. Jenkins
- School of Biomolecular and Physical Sciences, Griffith University, Brisbane, QLD, 4111, Australia, and Eskitis Institute for Cell and Molecular Therapies, Griffith University, Brisbane, QLD, 4111, Australia
| | - Luke C. Henderson
- School of Biomolecular and Physical Sciences, Griffith University, Brisbane, QLD, 4111, Australia, and Eskitis Institute for Cell and Molecular Therapies, Griffith University, Brisbane, QLD, 4111, Australia
| | - Marc R. Campitelli
- School of Biomolecular and Physical Sciences, Griffith University, Brisbane, QLD, 4111, Australia, and Eskitis Institute for Cell and Molecular Therapies, Griffith University, Brisbane, QLD, 4111, Australia
| | - Peter C. Healy
- School of Biomolecular and Physical Sciences, Griffith University, Brisbane, QLD, 4111, Australia, and Eskitis Institute for Cell and Molecular Therapies, Griffith University, Brisbane, QLD, 4111, Australia
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Moreau RJ, Sorensen EJ. Classical carbonyl reactivity enables a short synthesis of the core structure of acutumine. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.03.024] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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Burgess KL, Corbett MS, Eugenio P, Lajkiewicz NJ, Liu X, Sanyal A, Yan W, Yuan Q, Snyder JK. Chiral anthracene and anthrone templates as stereocontrolling elements in Diels–Alder/retro Diels–Alder sequences. Bioorg Med Chem 2005; 13:5299-309. [PMID: 16046136 DOI: 10.1016/j.bmc.2005.06.025] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2005] [Accepted: 05/18/2005] [Indexed: 11/17/2022]
Abstract
The development of chiral anthracene templates for use in Diels-Alder/retro Diels-Alder sequences is described. A summary of past results and new progress is reported.
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Affiliation(s)
- Kerrie L Burgess
- Department of Chemistry and Center for Methodology and Library Development, Boston University, 590 Commonwealth Ave., Boston, MA 02215, USA
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13
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Matsumoto K, Hamana H, Iida H. Compendium of Cycloaddition Reactions under High Pressure. Helv Chim Acta 2005. [DOI: 10.1002/hlca.200590156] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Sanyal A, Yuan Q, Snyder JK. A new, chiral aminoanthracene for the Diels–Alder/retro-Diels–Alder sequence in lactam and butenolide synthesis. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.02.046] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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