1
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Tavakoli A, Dudley GB. Regioselective [2 + 2 + 2] Alkyne Cyclotrimerizations to Hexasubstituted Benzenes: Syntheses of Fomajorin D and Fomajorin S. J Org Chem 2024; 89:6847-6852. [PMID: 38683747 PMCID: PMC11110065 DOI: 10.1021/acs.joc.4c00224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 04/09/2024] [Accepted: 04/17/2024] [Indexed: 05/02/2024]
Abstract
Hexasubstituted benzenoids are prepared by regioselective bimolecular [2 + 2 + 2] alkyne cyclotrimerizations of diynes with alkynes. These convergent and efficient benzannulations are directed toward and lead to the first total syntheses of the illudalane sequiterpenes fomajorin D and S, in 10 and 7 steps, respectively, from commercially available dimedone. Control experiments suggest that hydrogen bonding may play a role in preorganizing the diyne and alkyne coupling partners for establishing the desired regioselectivity, but other factors are likely involved in the selective formation of other regioisomers.
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Affiliation(s)
- Amir Tavakoli
- C. Eugene Bennett Department
of Chemistry, West Virginia University, Morgantown, West Virginia 26505, United States
| | - Gregory B. Dudley
- C. Eugene Bennett Department
of Chemistry, West Virginia University, Morgantown, West Virginia 26505, United States
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2
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Saunthwal RK, Saini KM, Grimblat N, Danodia AK, Kumar S, Gandon V, Verma AK. Expedient Access to Polyaromatic Biaryls by Unconventional Ag-Catalyzed Cycloaromatization of Alkynylthiophenes and Au-Catalyzed Double C-H Activation. Org Lett 2022; 24:5018-5022. [PMID: 35799326 DOI: 10.1021/acs.orglett.2c01665] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
An unconventional approach for the regioselective synthesis of polyaromatic biaryls via site-selective Ag-catalyzed twofold electrophilic cycloisomerization followed by Au-catalyzed double C-H activation is described. The developed process allows the synthesis of highly decorated biaryls with excellent regioselectivity. As revealed by DFT computations, the reaction represents a rare example of C1-C5 endo-exo and C1-C6 endo-endo cycloaromatization. The formation of the 6-membered ring is predicted to be the fruit of an uncommon SEAr on a vinyl carbocation.
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Affiliation(s)
| | | | - Nicolas Grimblat
- Laboratoire de Chimie Moléculaire (LCM), CNRS UMR 9168, Ecole Polytechnique, Institut Polytechnique de Paris, route de Saclay, 91128 Palaiseau cedex, France.,Instituto de Química Rosario (IQUIR, CONICET-UNR) and Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531 (S2002LRK), Rosario, República Argentina
| | | | - Sushil Kumar
- Department of Chemistry, University of Delhi, Delhi-110007, India
| | - Vincent Gandon
- Laboratoire de Chimie Moléculaire (LCM), CNRS UMR 9168, Ecole Polytechnique, Institut Polytechnique de Paris, route de Saclay, 91128 Palaiseau cedex, France.,Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), CNRS UMR 8182, Université Paris-Saclay, Bâtiment 420, 91405 Orsay cedex, France
| | - Akhilesh K Verma
- Department of Chemistry, University of Delhi, Delhi-110007, India.,Institution of Eminence, University of Delhi, Delhi-110007, India
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3
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Park KHK, Frank N, Duarte F, Anderson EA. Collective Synthesis of Illudalane Sesquiterpenes via Cascade Inverse Electron Demand (4 + 2) Cycloadditions of Thiophene S, S-Dioxides. J Am Chem Soc 2022; 144:10017-10024. [PMID: 35609003 PMCID: PMC9185749 DOI: 10.1021/jacs.2c03304] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Thiophene S,S-dioxides are underutilized tools for the de novo construction of benzene rings in organic synthesis. We report a collective synthesis of nine illudalane sesquiterpenes using bicyclic thiophene S,S-dioxides as generalized precursors to the indane core of the natural products. Exploiting furans as unusual dienophiles in this inverse electron demand Diels-Alder cascade, this concise and convergent approach enables the synthesis of these targets in as little as five steps. Theoretical studies rationalize the reactivity of thiophene S,S-dioxides with both electron-poor and electron-rich dienophiles and reveal reaction pathways involving either nonpolar pericyclic or bifurcating ambimodal cycloadditions. Overall, this work demonstrates the wider potential of thiophene S,S-dioxides as convenient and flexible precursors to polysubstituted arenes.
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Affiliation(s)
- Kun Ho Kenny Park
- Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Nils Frank
- Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Fernanda Duarte
- Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Edward A Anderson
- Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, U.K
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4
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Tavakoli A, Dudley GB. Synthesis of 4,4-Dimethyl-1,6-heptadiyne and Other Neopentylene-Tethered (NPT) 1,6-Diynes. J Org Chem 2022; 87:5773-5784. [PMID: 35427143 DOI: 10.1021/acs.joc.2c00110] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Amir Tavakoli
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26505, United States
| | - Gregory B. Dudley
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26505, United States
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5
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Martin AC, Rogers JA, Batsomboon P, Morrison AE, Ramsubhag RR, Popp BV, Dudley GB. Benzannulation and Hydrocarboxylation Methods for the Synthesis of a Neopentylene-Fused Analogue of Ibuprofen. ACS OMEGA 2021; 6:30108-30114. [PMID: 34778682 PMCID: PMC8582271 DOI: 10.1021/acsomega.1c04943] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 10/14/2021] [Indexed: 05/02/2023]
Abstract
Neopentylene ring fusions (ring-fused 4,4-dimethylcyclopentane polycycles) are found in many natural products, but they are largely absent from synthetic compound libraries and focused medicinal chemistry research. Here is reported a synthetic approach to one of the few non-natural product-based target compounds from medicinal chemistry that includes a neopentylene ring fusion: an analogue of ibuprofen referred to herein as "neoprofen". The approach features ring-opening fragmentation reactions of dimedone derivatives coupled with transition metal-catalyzed benzannulation and hydrocarboxylation methods.
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Affiliation(s)
- A. C. Martin
- C.
Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26505, United States
| | - Jessica A. Rogers
- C.
Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26505, United States
| | - Paratchata Batsomboon
- C.
Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26505, United States
| | - Alec E. Morrison
- Department
of Chemistry and Biochemistry, Florida State
University, Tallahassee, Florida 32306, United States
| | - Ron R. Ramsubhag
- Department
of Chemistry and Biochemistry, Florida State
University, Tallahassee, Florida 32306, United States
| | - Brian V. Popp
- C.
Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26505, United States
| | - Gregory B. Dudley
- C.
Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26505, United States
- Department
of Chemistry and Biochemistry, Florida State
University, Tallahassee, Florida 32306, United States
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6
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Fulo HF, Shoeib A, Cabanlong CV, Williams AH, Zhan CG, Prather PL, Dudley GB. Synthesis, Molecular Pharmacology, and Structure-Activity Relationships of 3-(Indanoyl)indoles as Selective Cannabinoid Type 2 Receptor Antagonists. J Med Chem 2021; 64:6381-6396. [PMID: 33887913 PMCID: PMC8683641 DOI: 10.1021/acs.jmedchem.1c00442] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Synthetic indole cannabinoids characterized by a 2',2'-dimethylindan-5'-oyl group at the indole C3 position constitute a new class of ligands possessing high affinity for human CB2 receptors at a nanomolar concentration and a good selectivity index. Starting from the neutral antagonist 4, the effects of indole core modification on the pharmacodynamic profile of the ligands were investigated. Several N1 side chains afforded potent and CB2-selective neutral antagonists, notably derivatives 26 (R1 = n-propyl, R2 = H) and 35 (R1 = 4-pentynyl, R2 = H). Addition of a methyl group at C2 improved the selectivity for the CB2 receptor. Moreover, C2 indole substitution may control the CB2 activity as shown by the functionality switch in 35 (antagonist) and 49 (R1 = 4-pentynyl, R2 = CH3, partial agonist).
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Affiliation(s)
- Harvey F Fulo
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506, United States
| | - Amal Shoeib
- Department of Pharmacology and Toxicology, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, United States
| | - Christian V Cabanlong
- Department of Pharmacology and Toxicology, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, United States
| | - Alexander H Williams
- Department of Pharmaceutical Sciences, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Chang-Guo Zhan
- Department of Pharmaceutical Sciences, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Paul L Prather
- Department of Pharmacology and Toxicology, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205, United States
| | - Gregory B Dudley
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506, United States
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7
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Zhou L, Liu X, Lu H, Deng G, Liang Y, Yang Y, Li JH. Copper-catalyzed [3 + 2]/[3 + 2] carboannulation of dienynes and arylsulfonyl chlorides enabled by Smiles rearrangement: access to cyclopenta[ a]indene-fused quinolinones. Org Chem Front 2021. [DOI: 10.1039/d1qo00703c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A radical Smiles rearrangement strategy for allowing an unprecedented [3 + 2]/[3 + 2] carboannulation of dienynes with arylsulfonyl chlorides using cheap copper catalysis is described.
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Affiliation(s)
- Liwei Zhou
- National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), and Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Hunan Normal University, Changsha 410081, China
| | - Xiaodong Liu
- National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), and Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Hunan Normal University, Changsha 410081, China
| | - Haiyan Lu
- National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), and Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Hunan Normal University, Changsha 410081, China
| | - Guobo Deng
- National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), and Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Hunan Normal University, Changsha 410081, China
| | - Yun Liang
- National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), and Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Hunan Normal University, Changsha 410081, China
| | - Yuan Yang
- National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), and Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Hunan Normal University, Changsha 410081, China
| | - Jin-Heng Li
- National & Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources, Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), and Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Hunan Normal University, Changsha 410081, China
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
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8
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Gaston R, Geldenhuys WJ, Dudley GB. Synthesis of Illudinine from Dimedone and Identification of Activity as a Monoamine Oxidase Inhibitor. J Org Chem 2020; 85:13429-13437. [PMID: 32830978 DOI: 10.1021/acs.joc.0c01301] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The fungal metabolite illudinine is prepared in seven steps and ca. 55% overall yield from dimedone using an "open and shut" (ring-opening and ring-closing) strategy. Tandem ring-opening fragmentation and olefination of dimedone establishes alkyne and vinylarene functionality linked by a neopentylene tether. Oxidative cycloisomerization then provides the illudinine framework. The key innovation in this second-generation synthesis of illudinine is the use of the nitrile functional group, rather than an ester, as the functional precursor to the carboxylic acid of illudinine. The small, linear nitrile (C≡N) is associated with improved selectivity, π-conjugation, and reactivity at multiple points in the synthetic sequence relative to the carboxylic acid ester. Preliminary assays indicate that illudinine and several related synthetic analogues are monoamine oxidase inhibitors, which is the first reported indication of biological activity associated with this natural product. Illudinine was found to inhibit monoamine oxidase B (MAO-B) with an IC50 of 18 ± 7.1 μM in preliminary assays.
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9
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Mahecha-Mahecha C, Lecornué F, Akinari S, Charote T, Gamba-Sánchez D, Ohwada T, Thibaudeau S. Sequential Suzuki-Miyaura Coupling/Lewis Acid-Catalyzed Cyclization: An Entry to Functionalized Cycloalkane-Fused Naphthalenes. Org Lett 2020; 22:6267-6271. [PMID: 32806180 DOI: 10.1021/acs.orglett.0c02020] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Functionalized angular cycloalkane-fused naphthalenes were prepared using a two-step process involving a Pd-catalyzed Suzuki-Miyaura coupling of aryl pinacol boronates and vinyl triflates followed by a boron trifluoride etherate-catalyzed cycloaromatization.
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Affiliation(s)
- Camilo Mahecha-Mahecha
- Université de Poitiers, UMR-CNRS 7285, IC2MP, Equipe Synthèse Organique-Groupe Superacide, 4 rue Michel Brunet, TSA 51106, 86073 Poitiers Cedex 9, France.,Laboratory of Organic Synthesis, Bio and Organocatalysis, Chemistry Department, Universidad de los Andes, Bogotá, Colombia
| | - Frédéric Lecornué
- Université de Poitiers, UMR-CNRS 7285, IC2MP, Equipe Synthèse Organique-Groupe Superacide, 4 rue Michel Brunet, TSA 51106, 86073 Poitiers Cedex 9, France
| | - Sumita Akinari
- Université de Poitiers, UMR-CNRS 7285, IC2MP, Equipe Synthèse Organique-Groupe Superacide, 4 rue Michel Brunet, TSA 51106, 86073 Poitiers Cedex 9, France.,Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo 113-0033, Japan
| | - Thomas Charote
- Université de Poitiers, UMR-CNRS 7285, IC2MP, Equipe Synthèse Organique-Groupe Superacide, 4 rue Michel Brunet, TSA 51106, 86073 Poitiers Cedex 9, France
| | - Diego Gamba-Sánchez
- Laboratory of Organic Synthesis, Bio and Organocatalysis, Chemistry Department, Universidad de los Andes, Bogotá, Colombia
| | - Tomohiko Ohwada
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo 113-0033, Japan
| | - Sébastien Thibaudeau
- Université de Poitiers, UMR-CNRS 7285, IC2MP, Equipe Synthèse Organique-Groupe Superacide, 4 rue Michel Brunet, TSA 51106, 86073 Poitiers Cedex 9, France
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10
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McCullough BS, Batsomboon P, Hutchinson KB, Dudley GB, Barrios AM. Synthesis and PTP Inhibitory Activity of Illudalic Acid and Its Methyl Ether, with Insights into Selectivity for LAR PTP over Other Tyrosine Phosphatases under Physiologically Relevant Conditions. JOURNAL OF NATURAL PRODUCTS 2019; 82:3386-3393. [PMID: 31809044 DOI: 10.1021/acs.jnatprod.9b00663] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
The protein tyrosine phosphatase (PTP) family of enzymes includes many attractive therapeutic targets, such as those in the leukocyte common antigen-related (LAR) subfamily of receptor PTPs. Synthesis and PTP inhibitory activity of illudalic acid and its methyl ether are described, with a focus on selective inhibition of LAR PTP relative to a small collection of other representative PTPs. The synthesis comprises 16 steps and provides illudalic acid in up to 12% overall yield from neopentylene-fused benzoate 1 (20 steps from commercial materials). Illudalic acid dose-dependently (measured IC50 = 2.1 ± 0.2 μM) and time-dependently inhibits LAR consistent with previous reports of covalent binding. The kinetics of LAR inhibition by illudalic acid are consistent with a two-step mechanism in which the inhibitor and enzyme first interact noncovalently (KI = 130 ± 50 μM), followed by covalent ligation at a rate kinact = 1.3 ± 0.4 min-1. The kinact/KI ratio of 104 corresponds to a t∞1/2 of 0.5 min, as discussed herein. The phenol methyl ether of illudalic acid was found to be less potent in our dose-response assays (measured IC50 = 55 ± 6 μM) but more selective for LAR, with a weaker initial noncovalent interaction and faster covalent ligation of LAR as compared to illudalic acid itself. A truncated analogue of illudalic acid that lacks the neopentylene ring fusion was found to be devoid of significant activity under our assay conditions, in contrast to previous reports. These observations collectively help inform further development of illudalic acid analogues as potent and selective inhibitors of the LAR subfamily of tyrosine phosphatases.
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Affiliation(s)
- Brandon S McCullough
- Department of Medicinal Chemistry , University of Utah , Salt Lake City , Utah 84112 , United States
| | - Paratchata Batsomboon
- C. Eugene Bennett Department of Chemistry , West Virginia University , Morgantown , West Virginia 26506 , United States
| | - Kacey B Hutchinson
- Department of Medicinal Chemistry , University of Utah , Salt Lake City , Utah 84112 , United States
| | - Gregory B Dudley
- C. Eugene Bennett Department of Chemistry , West Virginia University , Morgantown , West Virginia 26506 , United States
| | - Amy M Barrios
- Department of Medicinal Chemistry , University of Utah , Salt Lake City , Utah 84112 , United States
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11
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Chang MY, Wu YS, Tsai YL, Chen HY. Synthesis of 2-Sulfonyl Indenes and Indanes. J Org Chem 2019; 84:11699-11723. [DOI: 10.1021/acs.joc.9b01606] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Meng-Yang Chang
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 807, Taiwan
| | - Yan-Shin Wu
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Yu-Lin Tsai
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Hsing-Yin Chen
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 807, Taiwan
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12
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Duangkamol C, Batsomboon P, Stiegman AE, Dudley GB. Microwave Heating Outperforms Conventional Heating for a Thermal Reaction that Produces a Thermally Labile Product: Observations Consistent with Selective Microwave Heating. Chem Asian J 2019; 14:2594-2597. [PMID: 31157510 DOI: 10.1002/asia.201900625] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 05/31/2019] [Indexed: 12/14/2022]
Abstract
Microwave (MW) heating is more effective than conventional (CONV) heating for promoting a high-temperature oxidative cycloisomerization reaction that was previously reported as a key step in a total synthesis of the natural product illudinine. The thermal reaction pathway as envisioned is an inverse electron-demand dehydro-Diels-Alder reaction with in situ oxidation to generate a substituted isoquinoline, which itself is unstable to the reaction conditions. Observed reaction yields were higher at a measured bulk temperature of 200 °C than at 180 °C or 220 °C; at 24 hours than at earlier or later time points; and when the reaction solution was heated using MW energy as opposed to CONV heating with a metal heat block. Selective MW heating of polar solute aggregates is postulated to explain these observations.
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Affiliation(s)
- Chuthamat Duangkamol
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, WV, 26505, USA
| | - Paratchata Batsomboon
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, WV, 26505, USA
| | - Albert E Stiegman
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL, 32306, USA
| | - Gregory B Dudley
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, WV, 26505, USA
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13
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Ma Y, Lv J, Liu C, Yao X, Yan G, Yu W, Ye J. Electrochemical [4+2] Annulation-Rearrangement-Aromatization of Styrenes: Synthesis of Naphthalene Derivatives. Angew Chem Int Ed Engl 2019; 58:6756-6760. [PMID: 30882992 DOI: 10.1002/anie.201902315] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Indexed: 11/09/2022]
Abstract
We report the first electrochemical strategy to synthesize functionalized naphthalene derivatives through [4+2] annulation-rearrangement-aromatization from styrenes under mild conditions. The electrolysis does not require metals, oxidants and high valence substrates, indicating the atom and step-economy ideals. The dehydrodimer produced through [4+2] cycloaddition of 4-methoxy α-methyl styrene is isolated and proved to be the key intermediate for the following oxydehydrogenation to form carbon cation, which undergoes rearrangement-aromatization to afford the final products. This reaction represents a powerful access to construct multi-substituted naphthalene blocks in a single step.
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Affiliation(s)
- Yueyue Ma
- Engineering Research Centre of Pharmaceutical Process Chemistry, Ministry of Education, Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Jufeng Lv
- Engineering Research Centre of Pharmaceutical Process Chemistry, Ministry of Education, Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Chengyu Liu
- Engineering Research Centre of Pharmaceutical Process Chemistry, Ministry of Education, Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Xiantong Yao
- Engineering Research Centre of Pharmaceutical Process Chemistry, Ministry of Education, Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Guoming Yan
- Shanghai Zhongxi Sunve Pharmaceutical Co., Ltd., No. 158 Minle Road, Fengxian District, Shanghai, 201419, China
| | - Wei Yu
- Shanghai Zhongxi Sunve Pharmaceutical Co., Ltd., No. 158 Minle Road, Fengxian District, Shanghai, 201419, China
| | - Jinxing Ye
- Engineering Research Centre of Pharmaceutical Process Chemistry, Ministry of Education, Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
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14
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Ma Y, Lv J, Liu C, Yao X, Yan G, Yu W, Ye J. Electrochemical [4+2] Annulation‐Rearrangement‐Aromatization of Styrenes: Synthesis of Naphthalene Derivatives. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201902315] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yueyue Ma
- Engineering Research Centre of Pharmaceutical Process ChemistryMinistry of EducationShanghai Key Laboratory of New Drug DesignSchool of PharmacyEast China University of Science and Technology 130 Meilong Road Shanghai 200237 China
| | - Jufeng Lv
- Engineering Research Centre of Pharmaceutical Process ChemistryMinistry of EducationShanghai Key Laboratory of New Drug DesignSchool of PharmacyEast China University of Science and Technology 130 Meilong Road Shanghai 200237 China
| | - Chengyu Liu
- Engineering Research Centre of Pharmaceutical Process ChemistryMinistry of EducationShanghai Key Laboratory of New Drug DesignSchool of PharmacyEast China University of Science and Technology 130 Meilong Road Shanghai 200237 China
| | - Xiantong Yao
- Engineering Research Centre of Pharmaceutical Process ChemistryMinistry of EducationShanghai Key Laboratory of New Drug DesignSchool of PharmacyEast China University of Science and Technology 130 Meilong Road Shanghai 200237 China
| | - Guoming Yan
- Shanghai Zhongxi Sunve Pharmaceutical Co., Ltd. No. 158 Minle Road, Fengxian District Shanghai 201419 China
| | - Wei Yu
- Shanghai Zhongxi Sunve Pharmaceutical Co., Ltd. No. 158 Minle Road, Fengxian District Shanghai 201419 China
| | - Jinxing Ye
- Engineering Research Centre of Pharmaceutical Process ChemistryMinistry of EducationShanghai Key Laboratory of New Drug DesignSchool of PharmacyEast China University of Science and Technology 130 Meilong Road Shanghai 200237 China
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15
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Shen MH, Liang XC, Li C, Wu H, Qu HY, Wang FM, Xu HD. Rhodium promoted intramolecular [4 + 2] cycloaddition of 2-azidodiene with alkyne: A transition metal catalysis approach to challenging fused bicyclic vinyl azide. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.03.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Zhang Y, Wu W, Fu C, Huang X, Ma S. Benzene construction via Pd-catalyzed cyclization of 2,7-alkadiynylic carbonates in the presence of alkynes. Chem Sci 2019; 10:2228-2235. [PMID: 30881648 PMCID: PMC6385558 DOI: 10.1039/c8sc04681f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2018] [Accepted: 12/18/2018] [Indexed: 12/27/2022] Open
Abstract
A palladium-catalyzed highly regio- and chemo-selective cyclization of 2,7-alkadiynylic carbonates with functionalized alkynes to construct 1,3-dihydroisobenzofuran and isoindoline derivatives under mild conditions has been developed. Functional groups such as alcohol, sulfonamide, and indoles could be well tolerated. After careful mechanistic studies, a mechanism involving oxidative addition and regioselectivity-defined double alkyne insertions has been proposed.
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Affiliation(s)
- Yuchen Zhang
- Laboratory of Molecular Recognition and Synthesis , Department of Chemistry , Zhejiang University , Hangzhou 310027 , Zhejiang , People's Republic of China . ;
| | - Wangteng Wu
- Laboratory of Molecular Recognition and Synthesis , Department of Chemistry , Zhejiang University , Hangzhou 310027 , Zhejiang , People's Republic of China . ;
| | - Chunling Fu
- Laboratory of Molecular Recognition and Synthesis , Department of Chemistry , Zhejiang University , Hangzhou 310027 , Zhejiang , People's Republic of China . ;
| | - Xin Huang
- Laboratory of Molecular Recognition and Synthesis , Department of Chemistry , Zhejiang University , Hangzhou 310027 , Zhejiang , People's Republic of China . ;
| | - Shengming Ma
- Laboratory of Molecular Recognition and Synthesis , Department of Chemistry , Zhejiang University , Hangzhou 310027 , Zhejiang , People's Republic of China . ;
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