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Runeberg P, Ryabukhin D, Lagerquist L, Rahkila J, Eklund P. Transformations and antioxidative activities of lignans and stilbenes at high temperatures. Food Chem 2023; 404:134641. [DOI: 10.1016/j.foodchem.2022.134641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 09/30/2022] [Accepted: 10/13/2022] [Indexed: 11/22/2022]
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2
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Hwang T, Tuccinardi JP, Beard AA, Jackson AC, Jung MJ, Wood JL. Total Syntheses of (±)-Dracocephalone A and (±)-Dracocequinones A and B. Angew Chem Int Ed Engl 2022; 61:e202210821. [PMID: 36121442 PMCID: PMC9828498 DOI: 10.1002/anie.202210821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Indexed: 01/12/2023]
Abstract
Described herein are the first total syntheses of (±)-dracocephalone A (1) and (±)-dracocequinones A (4) and B (5). The synthesis was initially envisioned as proceeding through an intramolecular isobenzofuran Diels-Alder reaction, a strategy that eventually evolved into a Lewis acid-promoted spirocyclization. This highly diastereoselective transformation set the stage for trans-decalin formation and a late-stage Suárez oxidation that produced a [3.2.1] oxabicycle suited for conversion to 1. Brønsted acid-mediated aromatization, followed by a series of carefully choreographed oxidations, allowed for rearrangement to a [2.2.2] oxabicycle poised for conversion to 4 and 5.
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Affiliation(s)
- Taehwan Hwang
- Department of Chemistry and BiochemistryBaylor UniversityOne Bear Place97348WacoTexas 76798USA
| | - Joseph P. Tuccinardi
- Department of Chemistry and BiochemistryBaylor UniversityOne Bear Place97348WacoTexas 76798USA
| | - Alexandra A. Beard
- Department of Chemistry and BiochemistryBaylor UniversityOne Bear Place97348WacoTexas 76798USA
| | - Amy C. Jackson
- Department of Chemistry and BiochemistryBaylor UniversityOne Bear Place97348WacoTexas 76798USA
| | - Min J. Jung
- Department of Chemistry and BiochemistryBaylor UniversityOne Bear Place97348WacoTexas 76798USA
| | - John L. Wood
- Department of Chemistry and BiochemistryBaylor UniversityOne Bear Place97348WacoTexas 76798USA
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3
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Kooli A, Wesenberg L, Beslać M, Krech A, Lopp M, Noёl T, Ošeka M. Electrochemical Hydroxylation of Electron‐Rich Arenes in Continuous‐Flow. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Anni Kooli
- Tallinn University of Technology: Tallinna Tehnikaulikool Department of Chemistry and Biotechnology ESTONIA
| | - Lars Wesenberg
- University of Amsterdam: Universiteit van Amsterdam Van't Hoff Institute for Molecular Sciences (HIMS) NETHERLANDS
| | - Marko Beslać
- TU/e: Technische Universiteit Eindhoven Department of Chemical Engineering and Chemistry NETHERLANDS
| | - Anastasiya Krech
- Tallinn University of Technology: Tallinna Tehnikaulikool Department of Chemistry and Biotechnology ESTONIA
| | - Margus Lopp
- Tallinn University of Technology: Tallinna Tehnikaulikool Department of Chemistry and Biotechnology ESTONIA
| | - Timothy Noёl
- University of Amsterdam: Universiteit van Amsterdam Van't Hoff Institute for Molecular Sciences (HIMS) NETHERLANDS
| | - Maksim Ošeka
- Tallinn University of Technology Department of Chemistry and Biotechnology Akadeemia tee 15 12618 Tallinn ESTONIA
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Fang X, Shen L, Hu X. Asymmetric total synthesis of (+)-ovafolinins A and B. Chem Commun (Camb) 2018; 54:7539-7541. [PMID: 29942973 DOI: 10.1039/c8cc03456g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
(+)-Ovafolinins A and B are two homologous lignans containing unique polycyclic skeletons. Benefiting from a highly diastereoselective alkylation of (S)-Taniguchi lactone, a double Friedel-Crafts reaction, a global debenzylation and a Cu(OAc)2-enabled benzylic oxidative cyclization, we present herein an efficient synthetic approach to (+)-ovafolinins A and B.
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Affiliation(s)
- Xianhe Fang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710127, China.
| | - Lei Shen
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710127, China.
| | - Xiangdong Hu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an 710127, China.
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Saima, Kumar L, Lavekar AG, Sharma T, Shamsuzzama, Equbal D, Siddiqi MI, Sinha AK, Nazir A. Chemo‐Biocatalytic Oxidative Condensation of Natural Arylpropene with 2‐Aminobenzothiazole into Schiff‐Bases as Potent Anti‐Amyloid Agents: Studies Employing Transgenic
C. elegans. ChemistrySelect 2018. [DOI: 10.1002/slct.201800243] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Saima
- Medicinal and Process Chemistry DivisionCSIR-Central Drug Research Institute Jankipuram extension Sitapur Road Lucknow, U.P. India
- Academy of Scientific and Innovative Research New Delhi India
| | - Lalit Kumar
- Toxicology divisionCSIR-Central Drug Research Institute Lucknow, U.P. India
| | - Aditya G. Lavekar
- Medicinal and Process Chemistry DivisionCSIR-Central Drug Research Institute Jankipuram extension Sitapur Road Lucknow, U.P. India
| | - Tanuj Sharma
- Molecular and Structural Biology DivisionCSIR-Central Drug Research Institute Lucknow, U.P. India
| | - Shamsuzzama
- Toxicology divisionCSIR-Central Drug Research Institute Lucknow, U.P. India
| | - Danish Equbal
- Medicinal and Process Chemistry DivisionCSIR-Central Drug Research Institute Jankipuram extension Sitapur Road Lucknow, U.P. India
| | - Mohammad Imran Siddiqi
- Molecular and Structural Biology DivisionCSIR-Central Drug Research Institute Lucknow, U.P. India
| | - Arun K. Sinha
- Medicinal and Process Chemistry DivisionCSIR-Central Drug Research Institute Jankipuram extension Sitapur Road Lucknow, U.P. India
- Academy of Scientific and Innovative Research New Delhi India
| | - Aamir Nazir
- Toxicology divisionCSIR-Central Drug Research Institute Lucknow, U.P. India
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Bai M, Li SF, Liu SF, Wang XB, Huang XX, Song SJ. Iridoid glycoside and lignans from a wild vegetable (Patrinia villosa
Juss.) with antioxidant activity. J Food Biochem 2018. [DOI: 10.1111/jfbc.12521] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Ming Bai
- School of Traditional Chinese Materia Medica, Key Laboratory of Structure-Based Drug Design and Discovery, Ministry of Education; Shenyang Pharmaceutical University; Shenyang 110016 People's Republic of China
| | - Shi-Fang Li
- School of Traditional Chinese Materia Medica, Key Laboratory of Structure-Based Drug Design and Discovery, Ministry of Education; Shenyang Pharmaceutical University; Shenyang 110016 People's Republic of China
| | - Si-Fan Liu
- School of Traditional Chinese Materia Medica, Key Laboratory of Structure-Based Drug Design and Discovery, Ministry of Education; Shenyang Pharmaceutical University; Shenyang 110016 People's Republic of China
| | - Xiao-Bo Wang
- Chinese People's Liberation Army 210 Hospital; Dalian 116021 People's Republic of China
| | - Xiao-Xiao Huang
- School of Traditional Chinese Materia Medica, Key Laboratory of Structure-Based Drug Design and Discovery, Ministry of Education; Shenyang Pharmaceutical University; Shenyang 110016 People's Republic of China
- Chinese People's Liberation Army 210 Hospital; Dalian 116021 People's Republic of China
| | - Shao-Jiang Song
- School of Traditional Chinese Materia Medica, Key Laboratory of Structure-Based Drug Design and Discovery, Ministry of Education; Shenyang Pharmaceutical University; Shenyang 110016 People's Republic of China
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Guo YA, Zhao M, Xu Z, Ye T. Total Synthesis and Stereochemical Assignment of Actinoranone. Chemistry 2017; 23:3572-3576. [DOI: 10.1002/chem.201700476] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Indexed: 12/27/2022]
Affiliation(s)
- Yi-an Guo
- Key Laboratory of Chemical Genomics; Engineering Laboratory for Chiral Drug Synthesis; School of Chemical Biology and Biotechnology; Peking University Shenzhen Graduate School; Xili, Nanshan District Shenzhen 518055 China
| | - Meng Zhao
- Key Laboratory of Chemical Genomics; Engineering Laboratory for Chiral Drug Synthesis; School of Chemical Biology and Biotechnology; Peking University Shenzhen Graduate School; Xili, Nanshan District Shenzhen 518055 China
| | - Zhengshuang Xu
- Key Laboratory of Chemical Genomics; Engineering Laboratory for Chiral Drug Synthesis; School of Chemical Biology and Biotechnology; Peking University Shenzhen Graduate School; Xili, Nanshan District Shenzhen 518055 China
| | - Tao Ye
- Key Laboratory of Chemical Genomics; Engineering Laboratory for Chiral Drug Synthesis; School of Chemical Biology and Biotechnology; Peking University Shenzhen Graduate School; Xili, Nanshan District Shenzhen 518055 China
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Camelio AM, Liang Y, Eliasen AM, Johnson TC, Yuan C, Schuppe AW, Houk KN, Siegel D. Computational and Experimental Studies of Phthaloyl Peroxide-Mediated Hydroxylation of Arenes Yield a More Reactive Derivative, 4,5-Dichlorophthaloyl Peroxide. J Org Chem 2015. [PMID: 26200205 DOI: 10.1021/acs.joc.5b01079] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The oxidation of arenes by the reagent phthaloyl peroxide provides a new method for the synthesis of phenols. A new, more reactive arene oxidizing reagent, 4,5-dichlorophthaloyl peroxide, computationally predicted and experimentally determined to possess enhanced reactivity, has expanded the scope of the reaction while maintaining a high level of tolerance for diverse functional groups. The reaction proceeds through a novel "reverse-rebound" mechanism with diradical intermediates. Mechanistic insight was achieved through isolation and characterization of minor byproducts, determination of linear free energy correlations, and computational analysis of substituent effects of arenes, each of which provided additional support for the reaction proceeding through the diradical pathway.
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Affiliation(s)
- Andrew M Camelio
- †Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | | | - Anders M Eliasen
- †Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States.,§Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, California 92037, United States
| | - Trevor C Johnson
- †Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States.,§Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, California 92037, United States
| | - Changxia Yuan
- †Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Alex W Schuppe
- †Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | | | - Dionicio Siegel
- †Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States.,§Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, California 92037, United States
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Gillard RM, Sperry J. Synthesis of 2-(3'-Indolyl)tetrahydrofurans by oxidative cycloetherification. J Org Chem 2015; 80:2900-6. [PMID: 25679438 DOI: 10.1021/acs.joc.5b00112] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of 2-(3'-indolyl)tetrahydrofurans have been prepared by a DDQ-mediated oxidative cycloetherification process. Performing the reaction under biphasic conditions prevents reductive cleavage of the products by the spent oxidant (DDQH2).
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Affiliation(s)
- Rachel M Gillard
- School of Chemical Sciences, University of Auckland , 23 Symonds St., Auckland, 1010, New Zealand
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Aubry S, Pellet-Rostaing S, Lemaire M. Oxidative Nucleophilic Substitution (SNOx) of the Benzylic Position as a Tunable Synthesis of Tetrahydroisoquinoline Natural Alkaloid Analogues. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700366] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Kumar V, Sharma A, Sharma M, Sharma UK, Sinha AK. DDQ catalyzed benzylic acetoxylation of arylalkanes: a case of exquisitely controlled oxidation under sonochemical activation. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.07.018] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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12
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Regioselective Oxidation of 4,5-Disubstituted Pyrazoles: Controlled by Resonance Stabilization versus Hyperconjugation. B KOREAN CHEM SOC 2005. [DOI: 10.5012/bkcs.2005.26.12.2078] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Facile synthesis of 2H-indazole derivatives starting from the Baylis–Hillman adducts of 2-cyclohexen-1-one. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.05.149] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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14
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Joshi BP, Sharma A, Sinha AK. Ultrasound-assisted convenient synthesis of hypolipidemic active natural methoxylated (E)-arylalkenes and arylalkanones. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.01.071] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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16
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Eklund PC, Sjöholm RE. Oxidative transformation of the natural lignan hydroxymatairesinol with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone. Tetrahedron 2003. [DOI: 10.1016/s0040-4020(03)00683-5] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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17
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Ghatak A, Dorsey JM, Garner CM, Pinney KG. Synthesis of methoxy and hydroxy containing tetralones: versatile intermediates for the preparation of biologically relevant molecules. Tetrahedron Lett 2003. [DOI: 10.1016/s0040-4039(03)00715-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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18
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LaLonde RT, Ramdayal F, Sarko A, Yanai K, Zhang M. Modes of methyleneoxy bridging and their effect on tetrahydronaphthalene lignan cytotoxicity. J Med Chem 2003; 46:1180-90. [PMID: 12646028 DOI: 10.1021/jm020158p] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Dioxatricyclodecane, oxabicyclooctane, and benzodihydropyran derivatives of alpha-conidendrin (ACON), podophyllotoxin (PT), and sikkimotoxin (SK) were prepared to learn which methyleneoxy bridging modes and arene and aryl substituents coincided with high cytotoxicity. PT-derived dioxatricyclodecane 14 showed in vitro activity at 10(-8) M. SK analogue 12 was less active, and ACON analogue 11 was inactive at 10(-4) M. In vivo intraperitoneal and subcutaneous activities of 14 were observed. In vitro cytotoxicities were higher for oxabicyclooctanes when hydroxymethyl group and methyleneoxy bridge were cis, as in deoxypicropodophyllin analog20, rather than trans, as in PT analogue 5. Acetylation of the hydroxymethyl group of 20 lowered activities, whereas acetylation of 5 increased or lowered activities. Reduction of the hydroxymethyl group of 5 to a methyl group increased cytotoxicities. Molecular dynamics indicated the THN scaffold of benzodihydropyrans was conformationally mobile, but scaffolds of oxabicyclooctanes and dioxatricyclodecanes were immobile. Each of three PT-benzodihydropyrans was less active than its oxabicyclooctane counterpart.
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Affiliation(s)
- Robert T LaLonde
- Department of Chemistry, State University of New York, College of Environmental Science and Forestry, Syracuse, New York 13210-2726, USA.
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Dantzig A, LaLonde RT, Ramdayal F, Shepard RL, Yanai K, Zhang M. Cytotoxic responses to aromatic ring and configurational variations in alpha-conidendrin, podophyllotoxin, and sikkimotoxin derivatives. J Med Chem 2001; 44:180-5. [PMID: 11170627 DOI: 10.1021/jm990563p] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Derivatives of alpha-conidendrin, podophyllotoxin, and sikkimotoxin were prepared to evaluate the cytotoxic contributions of C-4 configuration and pendant and fused arene substitutions. Dimethyl-alpha-conidendryl alcohol (5), 9-deoxypodophyllol (6), and 9-deoxysikkimol (17) were dehydrated to their respective oxolane derivatives 4, 3, and 9. Diols 5 and 6 were converted via oxabicyclo[3.2.1]octanols 10 and 14 to target oxolanes 8 and 7 where C-4 had been inverted relative to that in 3 and 4. Cytotoxicities of the five oxolanes were determined in two drug-sensitive human leukemia and two multidrug-resistant cell lines expressing P-glycoprotein or multidrug-resistance associated protein (MRP). Changing the pendant arene configuration or replacing a m-methoxy by hydrogen resulted in a 100-fold cytotoxicity loss. Replacing a methylenedioxy group in the fused arene by two methoxy substituents reduced cytotoxicity by 10-fold. Drug-resistant cell lines were equally resistant to compounds 3, 4, 8, and 9 indicating that these four compounds do not serve as substrates of the transport proteins P-glycoprotein and MRP.
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Affiliation(s)
- A Dantzig
- Department of Chemistry, State University of New York, College of Environmental Science and Forestry, Syracuse, New York 13210-2726, USA
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