51
|
Yaremenko IA, Belyakova YY, Radulov PS, Novikov RA, Medvedev MG, Krivoshchapov NV, Korlyukov AA, Alabugin IV, Terent'ev AO. Marriage of Peroxides and Nitrogen Heterocycles: Selective Three-Component Assembly, Peroxide-Preserving Rearrangement, and Stereoelectronic Source of Unusual Stability of Bridged Azaozonides. J Am Chem Soc 2021; 143:6634-6648. [PMID: 33877842 DOI: 10.1021/jacs.1c02249] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Stable bridged azaozonides can be selectively assembled via a catalyst-free three-component condensation of 1,5-diketones, hydrogen peroxide, and an NH-group source such as aqueous ammonia or ammonium salts. This procedure is scalable and can produce gram quantities of bicyclic stereochemically rich heterocycles. The new azaozonides are thermally stable and can be stored at room temperature for several months without decomposition and for at least 1 year at -10 °C. The chemical stability of azaozonides was explored for their subsequent selective transformations including the first example of an aminoperoxide rearrangement that preserves the peroxide group. The amino group in aminoperoxides has remarkably low nucleophilicity and does not participate in the usual amine alkylation and acylation reactions. These observations and the 15 pKa units decrease in basicity in comparison with a typical dialkyl amine are attributed to the strong hyperconjugative nN→σ*C-O interaction with the two antiperiplanar C-O bonds. Due to the weakness of the complementary nO→σ*C-N donation from the peroxide oxygens (a consequence of "inverse α-effect"), this interaction depletes electron density from the NH moiety, protects it from oxidation, and makes it similar in properties to an amide.
Collapse
Affiliation(s)
- Ivan A Yaremenko
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospekt, 119991 Moscow, Russian Federation
| | - Yulia Yu Belyakova
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospekt, 119991 Moscow, Russian Federation
| | - Peter S Radulov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospekt, 119991 Moscow, Russian Federation
| | - Roman A Novikov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospekt, 119991 Moscow, Russian Federation
| | - Michael G Medvedev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospekt, 119991 Moscow, Russian Federation
| | - Nikolai V Krivoshchapov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospekt, 119991 Moscow, Russian Federation
| | - Alexander A Korlyukov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilova Street, 119991 Moscow, Russian Federation
| | - Igor V Alabugin
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Alexander O Terent'ev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Prospekt, 119991 Moscow, Russian Federation
| |
Collapse
|
52
|
Wang B, Xu B, Xun W, Guo Y, Zhang J, Qiu FG. A General Strategy for the Construction of Calyciphylline A‐Type Alkaloids: Divergent Total Syntheses of (−)‐Daphenylline and (−)‐Himalensine A. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Bingyang Wang
- Guangzhou Institutes of Biomedicine and Health Chinese Academy of Sciences Guangzhou 510530 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Bo Xu
- Guangzhou Institutes of Biomedicine and Health Chinese Academy of Sciences Guangzhou 510530 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Wen Xun
- Guangzhou Institutes of Biomedicine and Health Chinese Academy of Sciences Guangzhou 510530 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Yiming Guo
- Guangzhou Institutes of Biomedicine and Health Chinese Academy of Sciences Guangzhou 510530 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Jing Zhang
- Guangzhou Institutes of Biomedicine and Health Chinese Academy of Sciences Guangzhou 510530 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Fayang G. Qiu
- Guangzhou Institutes of Biomedicine and Health Chinese Academy of Sciences Guangzhou 510530 China
- University of Chinese Academy of Sciences Beijing 100049 China
| |
Collapse
|
53
|
Wang B, Xu B, Xun W, Guo Y, Zhang J, Qiu FG. A General Strategy for the Construction of Calyciphylline A-Type Alkaloids: Divergent Total Syntheses of (-)-Daphenylline and (-)-Himalensine A. Angew Chem Int Ed Engl 2021; 60:9439-9443. [PMID: 33569888 DOI: 10.1002/anie.202016212] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Revised: 01/31/2021] [Indexed: 12/16/2022]
Abstract
An efficient general strategy for the synthesis of the Daphniphyllum alkaloids via the rapid construction of a common core intermediate has been established, based on which a divergent total synthesis of (-)-daphenylline and (-)-himalensine A has been accomplished in 16 and 19 steps, respectively. The present work features an enantioselective Mg(ClO4 )2 -catalyzed intramolecular amidocyclization to construct the aza-bridged core structure; a Cu-catalyzed intramolecular cyclopropanation and subsequent phosphine-catalyzed Cope-type rearrangement to furnish the himalensine A scaffold; and a one-pot Diels-Alder/aromatization method to assemble the aromatic skeleton of daphenylline.
Collapse
Affiliation(s)
- Bingyang Wang
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Bo Xu
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Wen Xun
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yiming Guo
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jing Zhang
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Fayang G Qiu
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| |
Collapse
|
54
|
Montagut E, Martin-Gomez MT, Marco MP. An Immunochemical Approach to Quantify and Assess the Potential Value of the Pseudomonas Quinolone Signal as a Biomarker of Infection. Anal Chem 2021; 93:4859-4866. [PMID: 33691411 PMCID: PMC8479725 DOI: 10.1021/acs.analchem.0c04731] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 03/04/2021] [Indexed: 01/20/2023]
Abstract
Quorum sensing (QS) is a bacterial cell density-based communication system using low molecular weight signals called autoinducers (AIs). Identification and quantification of these molecules could provide valuable information related to the stage of colonization or infection as well as the stage of the disease. With this scenario, we report here for the first time the development of antibodies against the PQS (pseudomonas quinolone signal), the main signaling molecule from the pqs QS system of Pseudomonas aeruginosa, and the development of a microplate-based enzyme-linked immunosorbent assay (ELISA) able of quantifying this molecule in complex biological media in the low nanometer range (LOD, 0.36 ± 0.14 nM in culture broth media). Moreover, the PQS ELISA here reported has been found to be robust and reliable, providing accurate results in culture media. The technique allowed us to follow up the PQS profile of the release of bacterial clinical isolates obtained from patients of different disease status. A clear correlation was found between the PQS immunoreactivity equivalents and the chronic or acute infection conditions, which supports the reported differences on virulence and behavior of these bacterial strains due to their adaptation capability to the host environment. The results obtained point to the potential of the PQS as a biomarker of infection and to the value of the antibodies and the technology developed for improving diagnosis and management of P. aeruginosa infections based on the precise identification of the pathogen, appropriate stratification of the patients according to their disease status, and knowledge of the disease progression.
Collapse
Affiliation(s)
- Enrique
J. Montagut
- Nanobiotechnology
for Diagnostics (Nb4D), Department of Surfactants and Nanobiotechnology, Institute for Advanced Chemistry of Catalonia (IQAC)
of the Spanish Council for Scientific Research (CSIC), 08034 Barcelona, Spain
- CIBER
de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Jordi Girona 18-26, 08034 Barcelona, Spain
| | - M. Teresa Martin-Gomez
- Microbiology
Department, Vall d’Hebron University
Hospital (VHUH), 08035 Barcelona, Spain
- Genetics
and Microbiology Department, Universitat
Autònoma de Barcelona (UAB), 08193 Barcelona, Spain
| | - M. Pilar Marco
- Nanobiotechnology
for Diagnostics (Nb4D), Department of Surfactants and Nanobiotechnology, Institute for Advanced Chemistry of Catalonia (IQAC)
of the Spanish Council for Scientific Research (CSIC), 08034 Barcelona, Spain
- CIBER
de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Jordi Girona 18-26, 08034 Barcelona, Spain
| |
Collapse
|
55
|
Dutka V, Oshchapovska N. Adsorption of Oligomeric Peroxides on Aerosil and Magnesium Oxide and Their Behavior on the Water-Air Phases Interface. CHEMISTRY & CHEMICAL TECHNOLOGY 2021. [DOI: 10.23939/chcht15.01.047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Oligomeric peroxide adsorption of sebacic acid on aerosil and magnesium oxide was studied. Adsorption process parameters were found. It is shown that the adsorption takes place through the hydrogen bonds formation between OH– groups of adsorbents surface and peroxide groups. The adsorption process suggests the behavior of peroxide compounds on the water-air phase’s interface. Monomolecular film formations on water surface for oligomeric peroxides were studied. It was found that calculated values of the area extrapolated to zero pressure (S0) depend on the solvent which was used to apply the peroxide in the phases interface. Oligomeric peroxide monolayers considered as condensation-type monolayers. Thermal decomposition of oligomeric peroxide and its di- and monoperoxide analogues was studied. It was shown that total constants of thermal degradation rate k for oligomeric peroxide are higher than those for di- and monoperoxide analogues. There is a correlation between S0 calculated values and the constants of thermal degradation rate for oligoperoxide. The less is S0 value the higher is k value. The conformational state of the macromolecule was preserved during transferring the oligomeric peroxide solution in an organic solvent to the phases interface that affects k values.
Collapse
|
56
|
Ye F, Liu Q, Cui R, Xu D, Gao Y, Chen H. Diverse Functionalization of Tetrahydro-β-carbolines or Tetrahydro-γ-carbolines via Oxidative Coupling Rearrangement. J Org Chem 2020; 86:794-812. [PMID: 33232143 DOI: 10.1021/acs.joc.0c02351] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
We report herein diverse functionalization of tetrahydro-β-carbolines (THβCs) or tetrahydro-γ-carbolines (THγCs) via oxidative coupling rearrangement. The treatment of THβCs or THγCs with t-BuOOH (TBHP) afforded 3-peroxyindolenines, followed by HCl catalyzed indolation to form unexpected 2-indolyl-3-peroxyindolenines. Further rearrangement of these peroxides allows for rapid access to a skeletally diverse chemical library in good to excellent yields.
Collapse
Affiliation(s)
- Fu Ye
- College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China
| | - Qing Liu
- College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China
| | - Ranran Cui
- College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China
| | - Dekang Xu
- College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China
| | - Yu Gao
- College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China
| | - Haijun Chen
- College of Chemistry, Fuzhou University, Fuzhou, Fujian 350116, China
| |
Collapse
|
57
|
Zuckerman DS, Woerpel KA. Synthesis of Enantiopure Triols from Racemic Baylis-Hillman Adducts Using a Diastereoselective Peroxidation Reaction. Org Lett 2020; 22:9075-9080. [PMID: 33141576 DOI: 10.1021/acs.orglett.0c03439] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Using a chiral (-)-menthone auxiliary, enantiopure cyclic derivatives of Baylis-Hillman adducts were synthesized. A diastereoselective peroxidation reaction was used to introduce an oxygen atom and establish another stereocenter. The resulting products could be elaborated by employing a one-flask reduction-acetylation protocol followed by a diastereoselective nucleophilic substitution reaction. Removal of the (-)-menthone auxiliary provided an enantiopure triol with a structure related to naturally occurring polyols.
Collapse
Affiliation(s)
- Dylan S Zuckerman
- Department of Chemistry, New York University, New York, New York 10003, United States
| | - K A Woerpel
- Department of Chemistry, New York University, New York, New York 10003, United States
| |
Collapse
|
58
|
Baeyer-Villiger-Including Domino Two-Step Oxidations of β-O-Substituted Primary Alcohols: Reflection of the Migratory Aptitudes of O-Substituted Alkyl Group in the Outcome of the Reaction. Catalysts 2020. [DOI: 10.3390/catal10111275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Following the recent development of the one-pot two-step oxidation protocol for primary β-alkoxy alcohols, additional primary β-oxy alcohols were examined under similar conditions. The outcome of these reactions closely follows the migratory aptitudes of the related α-oxy-alkyls in Baeyer-Villiger oxidation vs. that of hydrogen. Thus, these experiments helped to establish the correct order of these aptitudes for α-oxy-alkyls. Furthermore, in the case of primary β,β-dialkoxyalcohols, the formation of dialkoxymethyl formates by the domino oxidation reaction was followed by secondary reactions, forming a number of interesting products.
Collapse
|
59
|
Demoret RM, Baker MA, Ohtawa M, Chen S, Lam CC, Khom S, Roberto M, Forli S, Houk KN, Shenvi RA. Synthetic, Mechanistic, and Biological Interrogation of Ginkgo biloba Chemical Space En Route to (-)-Bilobalide. J Am Chem Soc 2020; 142:18599-18618. [PMID: 32991152 PMCID: PMC7727090 DOI: 10.1021/jacs.0c08231] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Here we interrogate the structurally dense (1.64 mcbits/Å3) GABAA receptor antagonist bilobalide, intermediates en route to its synthesis, and related mechanistic questions. 13C isotope labeling identifies an unexpected bromine migration en route to an α-selective, catalytic asymmetric Reformatsky reaction, ruling out an asymmetric allylation pathway. Experiment and computation converge on the driving forces behind two surprising observations. First, an oxetane acetal persists in concentrated mineral acid (1.5 M DCl in THF-d8/D2O); its longevity is correlated to destabilizing steric clash between substituents upon ring-opening. Second, a regioselective oxidation of des-hydroxybilobalide is found to rely on lactone acidification through lone-pair delocalization, which leads to extremely rapid intermolecular enolate equilibration. We also establish equivalent effects of (-)-bilobalide and the nonconvulsive sesquiterpene (-)-jiadifenolide on action potential-independent inhibitory currents at GABAergic synapses, using (+)-bilobalide as a negative control. The high information density of bilobalide distinguishes it from other scaffolds and may characterize natural product (NP) space more generally. Therefore, we also include a Python script to quickly (ca. 132 000 molecules/min) calculate information content (Böttcher scores), which may prove helpful to identify important features of NP space.
Collapse
Affiliation(s)
- Robert M. Demoret
- Department of Chemistry, Scripps Research, La Jolla, California 92037, United States
| | - Meghan A. Baker
- Department of Chemistry, Scripps Research, La Jolla, California 92037, United States
| | - Masaki Ohtawa
- Department of Chemistry, Scripps Research, La Jolla, California 92037, United States
| | - Shuming Chen
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, USA
| | - Ching Ching Lam
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, USA
| | - Sophia Khom
- Departments of Molecular Medicine and Neuroscience, La Jolla, California 92037, United States
| | - Marisa Roberto
- Departments of Molecular Medicine and Neuroscience, La Jolla, California 92037, United States
| | - Stefano Forli
- DISCoBio, Scripps Research, La Jolla, California 92037, United States
| | - Kendall N. Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, USA
| | - Ryan A. Shenvi
- Department of Chemistry, Scripps Research, La Jolla, California 92037, United States
| |
Collapse
|
60
|
Jabeen S, Farag M, Malek B, Choudhury R, Greer A. A Singlet Oxygen Priming Mechanism: Disentangling of Photooxidative and Downstream Dark Effects. J Org Chem 2020; 85:12505-12513. [PMID: 32885660 DOI: 10.1021/acs.joc.0c01712] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Airborne singlet oxygen obtained from photosensitization of triplet dioxygen is shown to react with an alkene surfactant (8-methylnon-7-ene-1 sulfonate) leading to "ene" hydroperoxides that in the dark inactivate planktonic Escherichia coli (E. coli). The "ene" hydroperoxide photoproducts are not toxic on their own, but they become toxic after the bacteria are pretreated with singlet oxygen. The total quenching rate constant (kT) of singlet oxygen of the alkene surfactant was measured to be 1.1 × 106 M-1 s-1 at the air/liquid interface. Through a new mechanism called singlet oxygen priming (SOP), the singlet oxygen leads to hydroperoxides then to peroxyl radicals, tetraoxides, and decomposition products, which also promote disinfection, and therefore offer a "one-two" punch. This offers a strong secondary toxic effect in an otherwise indiscernible dark reaction. The results provide an insight into assisted killing by an exogenous alkene with dark toxicity effects following exposure to singlet oxygen.
Collapse
Affiliation(s)
- Shakeela Jabeen
- Department of Chemistry, Brooklyn College of the City University of New York, Brooklyn, New York 11210, United States.,Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, 365 Fifth Avenue, New York, New York 10016, United States
| | - Maria Farag
- Department of Chemistry, Brooklyn College of the City University of New York, Brooklyn, New York 11210, United States
| | - Belaid Malek
- Department of Chemistry, Brooklyn College of the City University of New York, Brooklyn, New York 11210, United States
| | - Rajib Choudhury
- Department of Chemistry, Arkansas Tech University, Russellville, Arkansas 72801, United States
| | - Alexander Greer
- Department of Chemistry, Brooklyn College of the City University of New York, Brooklyn, New York 11210, United States.,Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, 365 Fifth Avenue, New York, New York 10016, United States
| |
Collapse
|
61
|
Kranz W, Wuchner K, Corradini E, Menzen T, Hawe A. Micelle Driven Oxidation Mechansim and Novel Oxidation Markers for Different Grades of Polysorbate 20 and 80. J Pharm Sci 2020; 109:3064-3077. [DOI: 10.1016/j.xphs.2020.06.028] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 06/25/2020] [Accepted: 06/29/2020] [Indexed: 02/09/2023]
|
62
|
Singh K, Kumar P, Jagadeesh C, Patel M, Das D, Saha J. An Approach to α‐ and β‐Amino Peroxides via Lewis Acid Catalyzed Ring Opening‐Peroxidation of Donor‐Acceptor Aziridines and
N
‐Activated Aziridines. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000815] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Kuldeep Singh
- Division of Molecular Synthesis & Drug Discovery Centre of Biomedical Research (CBMR) SGPGIMS Campus. Raebareli Road Lucknow 226014 Uttar Pradesh. India
| | - Pramod Kumar
- Division of Molecular Synthesis & Drug Discovery Centre of Biomedical Research (CBMR) SGPGIMS Campus. Raebareli Road Lucknow 226014 Uttar Pradesh. India
| | - Chenna Jagadeesh
- Division of Molecular Synthesis & Drug Discovery Centre of Biomedical Research (CBMR) SGPGIMS Campus. Raebareli Road Lucknow 226014 Uttar Pradesh. India
| | - Manveer Patel
- Division of Molecular Synthesis & Drug Discovery Centre of Biomedical Research (CBMR) SGPGIMS Campus. Raebareli Road Lucknow 226014 Uttar Pradesh. India
| | - Dinabandhu Das
- School of Physical Sciences Jawaharlal Nehru University New Delhi India
| | - Jaideep Saha
- Division of Molecular Synthesis & Drug Discovery Centre of Biomedical Research (CBMR) SGPGIMS Campus. Raebareli Road Lucknow 226014 Uttar Pradesh. India
| |
Collapse
|
63
|
Smajlagic I, Kazim M, Lectka T, Dudding T. DFT Case Study of the Mechanism of a Metal-Free Oxygen Atom Insertion into a p-Quinone Methide C(sp 3)-C(sp 2) Bond. J Org Chem 2020; 85:10110-10117. [PMID: 32633515 DOI: 10.1021/acs.joc.0c01371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The site-selective introduction of an oxygen atom into an organic molecule, without the assistance of metals, is a useful transformation, though understanding the mechanistic underpinning of such a process is oftentimes a challenging task. In exploring this chemical space and in building upon experimental precedents, we have utilized computational tools to delineate the mechanistic details of site-selective oxygen atom insertion into a p-quinone methide C(sp3)-C(sp2) bond. To this end, several different reaction pathways for oxygen atom insertion were explored-each encompassing a unique element qualifying the respective pathway as being more or less feasible. The findings of these investigations revealed several features that were vital to this reactivity, including the formation of a dimeric intermediate, interconversion between ground- and excited-state species, and strain. Notably, the latter finding adds to the portfolio of strain-release-driven reactions that have emerged as popular methods to achieve otherwise difficult chemical transformations.
Collapse
Affiliation(s)
- Ivor Smajlagic
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario L2S 3A1, Canada
| | - Muhammad Kazim
- Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Thomas Lectka
- Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Travis Dudding
- Department of Chemistry, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, Ontario L2S 3A1, Canada
| |
Collapse
|
64
|
Vil’ VA, Yaremenko IA, Fomenkov DI, Levitsky DO, Fleury F, Terent’ev AO. Ion exchange resin-catalyzed synthesis of bridged tetraoxanes possessing in vitro cytotoxicity against HeLa cancer cells. Chem Heterocycl Compd (N Y) 2020. [DOI: 10.1007/s10593-020-02722-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
65
|
Frahm M, Drathen T, Gronbach LM, Voss A, Lorenz F, Bresien J, Villinger A, Hoffmann F, Brasholz M. Visible‐Light Cascade Photooxygenation of Tetrahydrocarbazoles and Cyclohepta[
b
]indoles: Access to
C
,
N
‐Diacyliminium Ions. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202007549] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Mario Frahm
- Institute of Chemistry University of Rostock Albert-Einstein-Str. 3A 18059 Rostock Germany
| | - Thorsten Drathen
- Department of Chemistry University of Hamburg Martin-Luther-King-Platz 6 20146 Hamburg Germany
| | - Lisa Marie Gronbach
- Institute of Chemistry University of Rostock Albert-Einstein-Str. 3A 18059 Rostock Germany
| | - Alice Voss
- Institute of Chemistry University of Rostock Albert-Einstein-Str. 3A 18059 Rostock Germany
| | - Felix Lorenz
- Institute of Chemistry University of Rostock Albert-Einstein-Str. 3A 18059 Rostock Germany
| | - Jonas Bresien
- Institute of Chemistry University of Rostock Albert-Einstein-Str. 3A 18059 Rostock Germany
| | - Alexander Villinger
- Institute of Chemistry University of Rostock Albert-Einstein-Str. 3A 18059 Rostock Germany
| | - Frank Hoffmann
- Department of Chemistry University of Hamburg Martin-Luther-King-Platz 6 20146 Hamburg Germany
| | - Malte Brasholz
- Institute of Chemistry University of Rostock Albert-Einstein-Str. 3A 18059 Rostock Germany
| |
Collapse
|
66
|
Frahm M, von Drathen T, Gronbach LM, Voss A, Lorenz F, Bresien J, Villinger A, Hoffmann F, Brasholz M. Visible-Light Cascade Photooxygenation of Tetrahydrocarbazoles and Cyclohepta[b]indoles: Access to C,N-Diacyliminium Ions. Angew Chem Int Ed Engl 2020; 59:12450-12454. [PMID: 32501642 PMCID: PMC7384090 DOI: 10.1002/anie.202007549] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Indexed: 11/11/2022]
Abstract
Tetrahydrocarbazoles and perhydrocyclohepta[b]indoles undergo a catalytic cascade singlet oxygenation in alkaline medium, which leads to chiral tricyclic perhydropyrido- and perhydroazepino[1,2-a]indoles in a single operation. These photooxygenation products are new synthetic equivalents of uncommon C,N-diacyliminium ions and can be functionalized with the aid of phosphoric acid organocatalysis.
Collapse
Affiliation(s)
- Mario Frahm
- Institute of ChemistryUniversity of RostockAlbert-Einstein-Str. 3A18059RostockGermany
| | - Thorsten von Drathen
- Department of ChemistryUniversity of HamburgMartin-Luther-King-Platz 620146HamburgGermany
| | - Lisa Marie Gronbach
- Institute of ChemistryUniversity of RostockAlbert-Einstein-Str. 3A18059RostockGermany
| | - Alice Voss
- Institute of ChemistryUniversity of RostockAlbert-Einstein-Str. 3A18059RostockGermany
| | - Felix Lorenz
- Institute of ChemistryUniversity of RostockAlbert-Einstein-Str. 3A18059RostockGermany
| | - Jonas Bresien
- Institute of ChemistryUniversity of RostockAlbert-Einstein-Str. 3A18059RostockGermany
| | - Alexander Villinger
- Institute of ChemistryUniversity of RostockAlbert-Einstein-Str. 3A18059RostockGermany
| | - Frank Hoffmann
- Department of ChemistryUniversity of HamburgMartin-Luther-King-Platz 620146HamburgGermany
| | - Malte Brasholz
- Institute of ChemistryUniversity of RostockAlbert-Einstein-Str. 3A18059RostockGermany
| |
Collapse
|
67
|
Ubale AS, Chaudhari MB, Shaikh MA, Gnanaprakasam B. Manganese-Catalyzed Synthesis of Quaternary Peroxides: Application in Catalytic Deperoxidation and Rearrangement Reactions. J Org Chem 2020; 85:10488-10503. [DOI: 10.1021/acs.joc.0c00837] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Akash S. Ubale
- Department of Chemistry, Indian Institute of Science Education and Research, Pune 411008, India
| | - Moreshwar B. Chaudhari
- Department of Chemistry, Indian Institute of Science Education and Research, Pune 411008, India
| | - Moseen A. Shaikh
- Department of Chemistry, Indian Institute of Science Education and Research, Pune 411008, India
| | - Boopathy Gnanaprakasam
- Department of Chemistry, Indian Institute of Science Education and Research, Pune 411008, India
| |
Collapse
|
68
|
Dornbusch DA, Viggiano RP, Lvovich VF. Integrated Impedance-NMR identification of electrolyte stability in Lithium-Air batteries. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
69
|
Nikishin GI, Kapustina NI, Sokova LL, Bityukov OV, Terent'ev AO. H2O2/HCl system: Oxidation-chlorination of secondary alcohols to α,α′-dichloro ketones. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152154] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
70
|
Affiliation(s)
- Moriah Locklear
- Department of Chemistry; University of Nebraska-Lincoln; 68588-0304 Lincoln NE USA
| | - Patrick H. Dussault
- Department of Chemistry; University of Nebraska-Lincoln; 68588-0304 Lincoln NE USA
| |
Collapse
|
71
|
Vil' VA, Barsegyan YA, Kuhn L, Ekimova MV, Semenov EA, Korlyukov AA, Terent'ev AO, Alabugin IV. Synthesis of unstrained Criegee intermediates: inverse α-effect and other protective stereoelectronic forces can stop Baeyer-Villiger rearrangement of γ-hydroperoxy-γ-peroxylactones. Chem Sci 2020; 11:5313-5322. [PMID: 34122989 PMCID: PMC8159355 DOI: 10.1039/d0sc01025a] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 05/05/2020] [Indexed: 12/17/2022] Open
Abstract
How far can we push the limits in removing stereoelectronic protection from an unstable intermediate? We address this question by exploring the interplay between the primary and secondary stereoelectronic effects in the Baeyer-Villiger (BV) rearrangement by experimental and computational studies of γ-OR-substituted γ-peroxylactones, the previously elusive non-strained Criegee intermediates (CI). These new cyclic peroxides were synthesized by the peroxidation of γ-ketoesters followed by in situ cyclization using a BF3·Et2O/H2O2 system. Although the primary effect (alignment of the migrating C-Rm bond with the breaking O-O bond) is active in the 6-membered ring, weakening of the secondary effect (donation from the OR lone pair to the breaking C-Rm bond) provides sufficient kinetic stabilization to allow the formation and isolation of stable γ-hydroperoxy-γ-peroxylactones with a methyl-substituent in the C6-position. Furthermore, supplementary protection is also provided by reactant stabilization originating from two new stereoelectronic factors, both identified and quantified for the first time in the present work. First, an unexpected boat preference in the γ-hydroperoxy-γ-peroxylactones weakens the primary stereoelectronic effects and introduces a ∼2 kcal mol-1 Curtin-Hammett penalty for reacquiring the more reactive chair conformation. Second, activation of the secondary stereoelectronic effect in the TS comes with a ∼2-3 kcal mol-1 penalty for giving up the exo-anomeric stabilization in the 6-membered Criegee intermediate. Together, the three new stereoelectronic factors (inverse α-effect, misalignment of reacting bonds in the boat conformation, and the exo-anomeric effect) illustrate the richness of stereoelectronic patterns in peroxide chemistry and provide experimentally significant kinetic stabilization to this new class of bisperoxides. Furthermore, mild reduction of γ-hydroperoxy-γ-peroxylactone with Ph3P produced an isolable γ-hydroxy-γ-peroxylactone, the first example of a structurally unencumbered CI where neither the primary nor the secondary stereoelectronic effect are impeded. Although this compound is relatively unstable, it does not undergo the BV reaction and instead follows a new mode of reactivity for the CI - a ring-opening process.
Collapse
Affiliation(s)
- Vera A Vil'
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences 47 Leninsky Prospect Moscow 119991 Russian Federation
| | - Yana A Barsegyan
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences 47 Leninsky Prospect Moscow 119991 Russian Federation
| | - Leah Kuhn
- Department of Chemistry and Biochemistry, Florida State University Tallahassee Fl 32306 USA
| | - Maria V Ekimova
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences 47 Leninsky Prospect Moscow 119991 Russian Federation
- D. I. Mendeleev University of Chemical Technology of Russia 9 Miusskaya Square Moscow 125047 Russian Federation
| | - Egor A Semenov
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences 47 Leninsky Prospect Moscow 119991 Russian Federation
- D. I. Mendeleev University of Chemical Technology of Russia 9 Miusskaya Square Moscow 125047 Russian Federation
| | - Alexander A Korlyukov
- A. N. Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences 28 Vavilov Street Moscow 119991 Russian Federation
- Pirogov Russian National Research Medical University Moscow 117997 Russian Federation
| | - Alexander O Terent'ev
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences 47 Leninsky Prospect Moscow 119991 Russian Federation
| | - Igor V Alabugin
- Department of Chemistry and Biochemistry, Florida State University Tallahassee Fl 32306 USA
| |
Collapse
|
72
|
Filipe OMS, Santos EBH, Otero M, Gonçalves EAC, Neves MGPMS. Photodegradation of metoprolol in the presence of aquatic fulvic acids. Kinetic studies, degradation pathways and role of singlet oxygen, OH radicals and fulvic acids triplet states. JOURNAL OF HAZARDOUS MATERIALS 2020; 385:121523. [PMID: 31732332 DOI: 10.1016/j.jhazmat.2019.121523] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2019] [Revised: 10/05/2019] [Accepted: 10/21/2019] [Indexed: 06/10/2023]
Abstract
Metoprolol is a pharmaceutical used for the treatment of cardiovascular diseases and disorders, whose frequent detection in surface waters raises concern. Indirect photodegradation is an important degradation pathway in waters and dissolved organic matter has a major role as photosensitizer. In this study, metoprolol photodegradation, in the absence and in the presence of fulvic acids extracted from the Vouga River (Portugal) (VRFA), was assessed under simulated sunlight. While metoprolol direct photodegradation was deniable, indirect photolysis occurred under the presence of VRFA. It followed a pseudo-first order kinetics and after 72 h of irradiation there was a decrease of metoprolol concentration of ∼80 %. The OH radical (OH) was verified to be the main reactive species (RS) responsible for the photosensitized degradation of metoprolol, but other RS are also involved, probably triplet excited states of FA (3FA*) and singlet oxygen (1O2), as demonstrated by the higher inhibition of the photodegradation in presence of sodium azide than in presence of 2-propanol. Based on a previous identification of photoproducts, tentative degradation mechanisms were here proposed. Photoproducts analysis after 24 h irradiation in the absence and presence of scavengers, shown that different RS are involved in the formation of different products/intermediates.
Collapse
Affiliation(s)
- Olga M S Filipe
- CERNAS - Research Centre for Natural Resources, Environment and Society, College of Agriculture, Polytechnic Institute of Coimbra, Bencanta, 3045-601 Coimbra, Portugal.
| | - Eduarda B H Santos
- CESAM - Centre for Environmental and Marine Studies, University of Aveiro, 3810-193 Aveiro, Portugal; Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Marta Otero
- CESAM - Centre for Environmental and Marine Studies, University of Aveiro, 3810-193 Aveiro, Portugal; Department of Environment and Planning, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Elsa A C Gonçalves
- Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - M Graça P M S Neves
- QOPNA & LAQV-REQUIMTE and Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| |
Collapse
|
73
|
Karanfil A, Şahin E, Kelebekli L. Synthesis of novel tetrols from syn-bisepoxide: Preparation of halogenated bicyclo[4.2.0] inositols. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131000] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
|
74
|
Zhou X, Zhang Z, Liu X, Wu D, Ding Y, Li G, Wu Y. Typical reactive carbonyl compounds in food products: Formation, influence on food quality, and detection methods. Compr Rev Food Sci Food Saf 2020; 19:503-529. [DOI: 10.1111/1541-4337.12535] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 11/25/2019] [Accepted: 12/28/2019] [Indexed: 01/08/2023]
Affiliation(s)
- Xuxia Zhou
- Department of Food Science and TechnologyZhejiang University of Technology Hangzhou China
| | - Zhiwen Zhang
- Department of Food Science and TechnologyZhejiang University of Technology Hangzhou China
| | - Xiaoying Liu
- Department of Food Science and TechnologyZhejiang University of Technology Hangzhou China
| | - Di Wu
- Yangtze Delta Region Institute of Tsinghua University Zhejiang China
| | - Yuting Ding
- Department of Food Science and TechnologyZhejiang University of Technology Hangzhou China
| | - Guoliang Li
- School of Food and Biological EngineeringShaanxi University of Science and Technology Xian China
| | - Yongning Wu
- NHC Key Laboratory of Food Safety Risk Assessment, Food Safety Research Unit (2019RU014) of Chinese Academy of Medical ScienceChina National Center for Food Safety Risk Assessment Beijing China
| |
Collapse
|
75
|
Chaudhari MB, Jayan K, Gnanaprakasam B. Sn-Catalyzed Criegee-Type Rearrangement of Peroxyoxindoles Enabled by Catalytic Dual Activation of Esters and Peroxides. J Org Chem 2020; 85:3374-3382. [DOI: 10.1021/acs.joc.9b03160] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Moreshwar B. Chaudhari
- Department of Chemistry, Indian Institute of Science Education and Research, Pune 411008, India
| | - Krishna Jayan
- Department of Chemistry, Indian Institute of Science Education and Research, Pune 411008, India
| | - Boopathy Gnanaprakasam
- Department of Chemistry, Indian Institute of Science Education and Research, Pune 411008, India
| |
Collapse
|
76
|
Mir BA, Rajamanickam S, Begum P, Patel BK. Copper(I) Catalyzed Differential Peroxidation of Terminal and Internal Alkenes Using TBHP. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901689] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Bilal Ahmad Mir
- Department of Chemistry; Indian Institute of Technology Guwahati; North Guwahati -781039 Assam India
| | - Suresh Rajamanickam
- Department of Chemistry; Indian Institute of Technology Guwahati; North Guwahati -781039 Assam India
| | - Pakiza Begum
- Department of Chemistry; Indian Institute of Technology Guwahati; North Guwahati -781039 Assam India
| | - Bhisma K. Patel
- Department of Chemistry; Indian Institute of Technology Guwahati; North Guwahati -781039 Assam India
| |
Collapse
|
77
|
Liu C, Wen K, Zeng X, Peng Y. Advances in Chemocatalytic Asymmetric Baeyer–Villiger Oxidations. Adv Synth Catal 2020. [DOI: 10.1002/adsc.201901178] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Chao Liu
- Key Laboratory of Small Functional Organic Molecule, Ministry of EducationJiangxi Normal University, Nanchang Jiangxi 330022 People's Republic of China
| | - Kai‐Ge Wen
- Key Laboratory of Small Functional Organic Molecule, Ministry of EducationJiangxi Normal University, Nanchang Jiangxi 330022 People's Republic of China
| | - Xing‐Ping Zeng
- Key Laboratory of Small Functional Organic Molecule, Ministry of EducationJiangxi Normal University, Nanchang Jiangxi 330022 People's Republic of China
| | - Yi‐Yuan Peng
- Key Laboratory of Small Functional Organic Molecule, Ministry of EducationJiangxi Normal University, Nanchang Jiangxi 330022 People's Republic of China
| |
Collapse
|
78
|
Ilovaisky AI, Merkulova VM, Vil' VA, Chernoburova EI, Shchetinina MA, Loguzov SD, Dmitrenok AS, Zavarzin IV, Terent'ev AO. Regioselective Baeyer-Villiger Oxidation of Steroidal Ketones to Lactones Using BF3/H2O2. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901701] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Alexey I. Ilovaisky
- N. D. Zelinsky Institute of Organic Chemistry; Russian Academy of Sciences; 47 Leninsky Prospect 119991 Moscow Russian Federation
- All-Russian Research Institute for Phytopathology; 143050 Moscow Russian Federation
| | - Valentina M. Merkulova
- N. D. Zelinsky Institute of Organic Chemistry; Russian Academy of Sciences; 47 Leninsky Prospect 119991 Moscow Russian Federation
| | - Vera A. Vil'
- N. D. Zelinsky Institute of Organic Chemistry; Russian Academy of Sciences; 47 Leninsky Prospect 119991 Moscow Russian Federation
- All-Russian Research Institute for Phytopathology; 143050 Moscow Russian Federation
| | - Elena I. Chernoburova
- N. D. Zelinsky Institute of Organic Chemistry; Russian Academy of Sciences; 47 Leninsky Prospect 119991 Moscow Russian Federation
| | - Marina A. Shchetinina
- N. D. Zelinsky Institute of Organic Chemistry; Russian Academy of Sciences; 47 Leninsky Prospect 119991 Moscow Russian Federation
| | - Sergey D. Loguzov
- N. D. Zelinsky Institute of Organic Chemistry; Russian Academy of Sciences; 47 Leninsky Prospect 119991 Moscow Russian Federation
| | - Andrey S. Dmitrenok
- N. D. Zelinsky Institute of Organic Chemistry; Russian Academy of Sciences; 47 Leninsky Prospect 119991 Moscow Russian Federation
| | - Igor V. Zavarzin
- N. D. Zelinsky Institute of Organic Chemistry; Russian Academy of Sciences; 47 Leninsky Prospect 119991 Moscow Russian Federation
| | - Alexander O. Terent'ev
- N. D. Zelinsky Institute of Organic Chemistry; Russian Academy of Sciences; 47 Leninsky Prospect 119991 Moscow Russian Federation
- All-Russian Research Institute for Phytopathology; 143050 Moscow Russian Federation
- D.I. Mendeleev University of Chemical Technology of Russia; 125047 Moscow Russian Federation
| |
Collapse
|
79
|
Generation and chemical properties of (3,4-di-tert-butyl-1,4-dihydropyrazolo[5,1-c][1,2,4]triazin-4-yl)lithiums. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2019.121060] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
80
|
Horn A, Dussault PH. A click-based modular approach to introduction of peroxides onto molecules and nanostructures. RSC Adv 2020; 10:44408-44429. [PMID: 35517136 PMCID: PMC9058499 DOI: 10.1039/d0ra09088c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Accepted: 11/20/2020] [Indexed: 12/21/2022] Open
Abstract
Copper-promoted azide/alkyne cycloadditions (CuAAC) are explored as a tool for modular introduction of peroxides onto molecules and nanomaterials.
Collapse
Affiliation(s)
- Alissa Horn
- Department of Chemistry
- University of Nebraska-Lincoln
- Lincoln
- USA
| | | |
Collapse
|
81
|
Geist E, Berneaud-Kötz H, Baikstis T, Dräger G, Kirschning A. Toward Chromanes by de Novo Construction of the Benzene Ring. Org Lett 2019; 21:8930-8933. [PMID: 31664844 DOI: 10.1021/acs.orglett.9b03209] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The work describes three principal Diels-Alder cycloaddition approaches toward chromanes that are designed for the de novo construction of the benzene ring. This study specifically focuses on the potential exploitation in the total synthesis of chromane-bearing natural products such as cebulactam A.
Collapse
Affiliation(s)
- Egor Geist
- Institute of Organic Chemistry and Center of Biomolecular Drug Research (BMWZ) at Leibniz Universität Hannover , Schneiderberg 1B , 30167 Hannover , Germany
| | - Helge Berneaud-Kötz
- Institute of Organic Chemistry and Center of Biomolecular Drug Research (BMWZ) at Leibniz Universität Hannover , Schneiderberg 1B , 30167 Hannover , Germany
| | - Tomas Baikstis
- Sygnature Discovery, Biocity , Pennyfoot Street , Nottingham NG11GR , United Kingdom
| | - Gerald Dräger
- Institute of Organic Chemistry and Center of Biomolecular Drug Research (BMWZ) at Leibniz Universität Hannover , Schneiderberg 1B , 30167 Hannover , Germany
| | - Andreas Kirschning
- Institute of Organic Chemistry and Center of Biomolecular Drug Research (BMWZ) at Leibniz Universität Hannover , Schneiderberg 1B , 30167 Hannover , Germany
| |
Collapse
|
82
|
Nilsson SME, Henschel H, Scotti G, Haapala M, Kiriazis A, Boije Af Gennäs G, Kotiaho T, Yli-Kauhaluoma J. Mechanism of the Oxidation of Heptafulvenes to Tropones Studied by Online Mass Spectrometry and Density Functional Theory Calculations. J Org Chem 2019; 84:13975-13982. [PMID: 31560537 PMCID: PMC7076690 DOI: 10.1021/acs.joc.9b02078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
We
have identified the most likely reaction mechanism for oxidizing
heptafulvenes to the corresponding tropones by experimental and theoretical
investigations. The experimental studies were done by coupling a three-dimensional
printed miniaturized reactor with an integrated electrospray ionization
needle to a mass spectrometer. Using the experimentally observed ions
as a basis, nine alternative reaction pathways were investigated with
density functional theory calculations. The lowest energy reaction
pathway starts with the formation of an epoxide that is opened upon
the addition of a second equivalent of the oxidizing species meta-chloroperoxybenzoic acid. The adduct formed then undergoes
a Criegee-like rearrangement to yield a positively charged hemiketal,
which on deprotonation dissociates into acetone and tropone. Overall,
the reaction mechanism resembles a Hock-like rearrangement.
Collapse
Affiliation(s)
- Sofia M E Nilsson
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, P.O. Box 56 (Viikinkaari 5 E) , FI-00014 University of Helsinki , Helsinki , Finland
| | - Henning Henschel
- Research Unit of Medical Imaging, Physics and Technology , University of Oulu , P.O. Box 5000 (Aapistie 5 A), FI-90220 Oulu , Finland.,Medical Research Center , University of Oulu and Oulu University Hospital , P.O. Box 5000 (Aapistie 5 A), FI-90220 Oulu , Finland
| | - Gianmario Scotti
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, P.O. Box 56 (Viikinkaari 5 E) , FI-00014 University of Helsinki , Helsinki , Finland
| | - Markus Haapala
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, P.O. Box 56 (Viikinkaari 5 E) , FI-00014 University of Helsinki , Helsinki , Finland
| | - Alexandros Kiriazis
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, P.O. Box 56 (Viikinkaari 5 E) , FI-00014 University of Helsinki , Helsinki , Finland
| | - Gustav Boije Af Gennäs
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, P.O. Box 56 (Viikinkaari 5 E) , FI-00014 University of Helsinki , Helsinki , Finland
| | - Tapio Kotiaho
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, P.O. Box 56 (Viikinkaari 5 E) , FI-00014 University of Helsinki , Helsinki , Finland.,Department of Chemistry, Faculty of Science, P.O. Box 55 (A.I. Virtasen Aukio 1) , FI-00014 University of Helsinki , Helsinki , Finland
| | - Jari Yli-Kauhaluoma
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, P.O. Box 56 (Viikinkaari 5 E) , FI-00014 University of Helsinki , Helsinki , Finland
| |
Collapse
|
83
|
Sun W, Gao L, Sun X, Yang H, Zheng G. Heterogeneous Nitrogen‐doped Graphene Catalysed HOO
−
Generation via a Non‐radical Mechanism for Base‐free Dakin Reaction. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900878] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Wei Sun
- School of Chemistry and Chemical EngineeringUniversity of Jinan No. 336 West Road of Nan Xinzhuang Jinan 250022 People's Republic of China E-mail
| | - Lingfeng Gao
- School of Chemistry and Chemical EngineeringUniversity of Jinan No. 336 West Road of Nan Xinzhuang Jinan 250022 People's Republic of China E-mail
| | - Xu Sun
- School of Chemistry and Chemical EngineeringUniversity of Jinan No. 336 West Road of Nan Xinzhuang Jinan 250022 People's Republic of China E-mail
| | - Hua Yang
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, School of Chemistry and Chemical EngineeringLiaocheng University 252059 Liaocheng People's Republic of China
| | - Gengxiu Zheng
- School of Chemistry and Chemical EngineeringUniversity of Jinan No. 336 West Road of Nan Xinzhuang Jinan 250022 People's Republic of China E-mail
| |
Collapse
|
84
|
Horn A, Dussault PH. Synthesis of α-Cyano and α-Sulfonyl Cyclic Ethers via Intramolecular Reactions of Peroxides with Sulfone- and Nitrile-Stabilized Carbanions. J Org Chem 2019; 84:14611-14626. [DOI: 10.1021/acs.joc.9b02112] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Alissa Horn
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska 68588-0304, United States
| | - Patrick H. Dussault
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska 68588-0304, United States
| |
Collapse
|
85
|
Mechanisms for the formation of ester compounds in the liquid-phase oxidation of cyclohexane. Russ Chem Bull 2019. [DOI: 10.1007/s11172-019-2630-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
86
|
Kazakova OB, Khusnutdinova EF, Petrova AV, Yamansarov EY, Lobov AN, Fedorova AA, Suponitsky KY. Diastereoselective Synthesis of Triterpenoid 1,2,4-Trioxolanes by Griesbaum Co-ozonolysis. JOURNAL OF NATURAL PRODUCTS 2019; 82:2550-2558. [PMID: 31490689 DOI: 10.1021/acs.jnatprod.9b00393] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Diastereoselective synthesis of triterpenoid 1,2,4-trioxolanes by Griesbaum co-ozonolysis was shown for the first time. Ozonolysis of 2-methoxyoximes (syn-anti-isomers mixture) of allobetulin or methyl oleanoate with CF3-ketones resulted in asymmetrical spiro-1,2,4-trioxolanes as mixtures of diastereomers in yields up to 80-85%. The configuration of the spiro-C-2 center of individual ozonides was determined by 2D NMR spectra and X-ray crystallographic analysis. The products of ozonolysis of triterpenoid 3-methoxyoximes were mixtures of regioisomeric N-methoxylactams. Thus, the fundamental differences in the oxidation of homologous triterpenoid 2- or 3-methoxyoximes with ozone have been established. These results may afford a new stage in the development of the Griesbaum method as applied to natural compounds and biologically active peroxides.
Collapse
Affiliation(s)
- Oxana B Kazakova
- Ufa Institute of Chemistry of the Ufa Federal Research Centre of the Russian Academy of Sciences , Ufa , 450054 , Russian Federation
| | - Elmira F Khusnutdinova
- Ufa Institute of Chemistry of the Ufa Federal Research Centre of the Russian Academy of Sciences , Ufa , 450054 , Russian Federation
| | - Anastasiya V Petrova
- Ufa Institute of Chemistry of the Ufa Federal Research Centre of the Russian Academy of Sciences , Ufa , 450054 , Russian Federation
| | - Emil Yu Yamansarov
- Ufa Institute of Chemistry of the Ufa Federal Research Centre of the Russian Academy of Sciences , Ufa , 450054 , Russian Federation
| | - Alexander N Lobov
- Ufa Institute of Chemistry of the Ufa Federal Research Centre of the Russian Academy of Sciences , Ufa , 450054 , Russian Federation
| | - Alexandra A Fedorova
- Ufa Institute of Chemistry of the Ufa Federal Research Centre of the Russian Academy of Sciences , Ufa , 450054 , Russian Federation
| | - Kyrill Yu Suponitsky
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences , Moscow 119991 , Russian Federation
| |
Collapse
|
87
|
Song H, Naowarojna N, Cheng R, Lopez J, Liu P. Non-heme iron enzyme-catalyzed complex transformations: Endoperoxidation, cyclopropanation, orthoester, oxidative C-C and C-S bond formation reactions in natural product biosynthesis. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2019; 117:1-61. [PMID: 31564305 DOI: 10.1016/bs.apcsb.2019.06.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Non-heme iron enzymes catalyze a wide range of chemical transformations, serving as one of the key types of tailoring enzymes in the biosynthesis of natural products. Hydroxylation reaction is the most common type of reactions catalyzed by these enzymes and hydroxylation reactions have been extensively investigated mechanistically. However, the mechanistic details for other types of transformations remain largely unknown or unexplored. In this paper, we present some of the most recently discovered transformations, including endoperoxidation, orthoester formation, cyclopropanation, oxidative C-C and C-S bond formation reactions. In addition, many of them are multi-functional enzymes, which further complicate their mechanistic investigations. In this work, we summarize their biosynthetic pathways, with special emphasis on the mechanistic details available for these newly discovered enzymes.
Collapse
Affiliation(s)
- Heng Song
- College of Chemistry and Molecular Sciences, Wuhan University, Hubei, People's Republic of China
| | | | - Ronghai Cheng
- Department of Chemistry, Boston University, Boston, MA, United States
| | - Juan Lopez
- Department of Chemistry, Boston University, Boston, MA, United States
| | - Pinghua Liu
- Department of Chemistry, Boston University, Boston, MA, United States
| |
Collapse
|
88
|
Zuckerman DS, Woerpel KA. Diastereoselective peroxidation of derivatives of Baylis-Hillman adducts. Tetrahedron 2019; 75:4118-4129. [PMID: 32831414 PMCID: PMC7437930 DOI: 10.1016/j.tet.2019.05.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Cyclic derivatives of Baylis-Hillman adducts were synthesized. Cobalt-catalyzed peroxidation of these cyclic lactones afforded silyl peroxides in diastereomeric ratios ranging from 91:9 to 97:3.
Collapse
Affiliation(s)
- Dylan S Zuckerman
- Department of Chemistry, New York University, 100 Washington Square East, New York, New York, 10003, United States
| | - K A Woerpel
- Department of Chemistry, New York University, 100 Washington Square East, New York, New York, 10003, United States
| |
Collapse
|
89
|
Wu CS, Liu RX, Ma DY, Luo CP, Yang L. Four-Component Radical Dual Difunctionalization (RDD) of Two Different Alkenes with Aldehydes and tert-Butyl Hydroperoxide (TBHP): An Easy Access to β,δ-Functionalized Ketones. Org Lett 2019; 21:6117-6121. [DOI: 10.1021/acs.orglett.9b02264] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chuan-Shuo Wu
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, College of Chemistry, Xiangtan University, Hunan 411105, P. R. China
| | - Ren-Xiang Liu
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, College of Chemistry, Xiangtan University, Hunan 411105, P. R. China
| | - Da-You Ma
- Xiangya School of Pharmaceutical Sciences, Central South University, Hunan 410013, P. R. China
| | - Cui-Ping Luo
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, College of Chemistry, Xiangtan University, Hunan 411105, P. R. China
| | - Luo Yang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, College of Chemistry, Xiangtan University, Hunan 411105, P. R. China
| |
Collapse
|
90
|
Baeyer-Villiger oxidation tuned to chemoselective conversion of non-activated [18
F]fluorobenzaldehydes to [18
F]fluorophenols. J Labelled Comp Radiopharm 2019; 62:380-392. [DOI: 10.1002/jlcr.3740] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 04/12/2019] [Accepted: 04/18/2019] [Indexed: 12/14/2022]
|
91
|
Pinet A, Nguyen TL, Bernadat G, Figadère B, Ferrié L. Synthesis of 3,5-Disubstituted 1,2-Dioxolanes through the Use of Acetoxy Peroxyacetals. Org Lett 2019; 21:4729-4733. [DOI: 10.1021/acs.orglett.9b01616] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Alexis Pinet
- BioCIS, Université Paris-Sud, CNRS, Université Paris-Saclay, Chatenay-Malabry 92290, France
| | - Thuy Linh Nguyen
- BioCIS, Université Paris-Sud, CNRS, Université Paris-Saclay, Chatenay-Malabry 92290, France
- Institute of Marine Biochemistry, Vietnam Academy of Science and Technology (VAST), Cau
Giay, Hanoi, Vietnam
| | - Guillaume Bernadat
- BioCIS, Université Paris-Sud, CNRS, Université Paris-Saclay, Chatenay-Malabry 92290, France
| | - Bruno Figadère
- BioCIS, Université Paris-Sud, CNRS, Université Paris-Saclay, Chatenay-Malabry 92290, France
| | - Laurent Ferrié
- BioCIS, Université Paris-Sud, CNRS, Université Paris-Saclay, Chatenay-Malabry 92290, France
| |
Collapse
|
92
|
Sahli F, Godard A, Vileno B, Lepoittevin JP, Giménez-Arnau E. Formation of methyl radicals derived from cumene hydroperoxide in reconstructed human epidermis: an EPR spin trapping confirmation by using 13C-substitution. Free Radic Res 2019; 53:737-747. [PMID: 31130017 DOI: 10.1080/10715762.2019.1624741] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Dermal exposure to cumene hydroperoxide (CumOOH) during manufacturing processes is a toxicological issue for the industry. Its genotoxicity, mutagenic action, ability to promote skin tumour, capacity to induce epidermal hyperplasia, and aptitude to induce allergic and irritant skin contact dermatitis are well known. These toxic effects appear to be mediated through the activation to free radical species such as hydroxyl, alkoxyl, and alkyl radicals characterised basically by electron paramagnetic resonance (EPR) and spin-trapping (ST) techniques. To be a skin sensitiser CumOOH needs to covalently bind to skin proteins in the epidermis to form the antigenic entity triggering the immunotoxic reaction. Cleavage of the O-O bond allows formation of unstable CumO•/CumOO• radicals rearranging to longer half-life specific carbon-centred radicals R• proposed to be at the origin of the antigen formation. Nevertheless, it is not still clear which R• is precisely formed in the epidermis and thus involved in the sensitisation process. The aim of this work was to elucidate in conditions closer to real-life sensitisation which specific R• are formed in a 3D reconstructed human epidermis (RHE) model by using 13C-substituted CumOOH at carbon positions precursors of potentially reactive radicals and EPR-ST. We demonstrated that most probably methyl radicals derived from β-scission of CumO• radicals occur in RHE through a one-electron reductive pathway suggesting that these could be involved in the antigen formation inducing skin sensitisation. We also describe a coupling between nitroxide radicals and β position 13C atoms that could be of an added value to the very few examples existing for the coupling of radicals with 13C atoms.
Collapse
Affiliation(s)
- Fatma Sahli
- a Dermatochemistry Laboratory, University of Strasbourg-CNRS UMR 7177 , Strasbourg , France
| | - Amélie Godard
- a Dermatochemistry Laboratory, University of Strasbourg-CNRS UMR 7177 , Strasbourg , France
| | - Bertrand Vileno
- b POMAM Laboratory, University of Strasbourg-CNRS UMR 7177 , Strasbourg , France.,c French EPR Federation of Research, REseau NAtional de Rpe InterDisciplinaire (RENARD) , France
| | | | - Elena Giménez-Arnau
- a Dermatochemistry Laboratory, University of Strasbourg-CNRS UMR 7177 , Strasbourg , France
| |
Collapse
|
93
|
Vil VA, Terent'ev AO, Savidov N, Gloriozova TA, Poroikov VV, Pounina TA, Dembitsky VM. Hydroperoxy steroids and triterpenoids derived from plant and fungi: Origin, structures and biological activities. J Steroid Biochem Mol Biol 2019; 190:76-87. [PMID: 30923015 DOI: 10.1016/j.jsbmb.2019.03.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 02/18/2019] [Accepted: 03/23/2019] [Indexed: 01/10/2023]
Abstract
Hydroperoxides (R-OOH) represent a small family of natural metabolites that have been isolated from higher plants, fungi, and marine organisms. This paper is devoted to the distribution of hydroperoxides in plants, fungi and terrestrial fungal endophytes and their biological activity. Hydroperoxides of plants demonstrate a wide range of biological activities however, antineoplastic and anti-ulcerative are most characteristic with confidence from 91 to 98 percent. For hydroperoxides from fungi, the dominant are antineoplastic and anti-hypercholesterolemic activities with confidence from 89 to 92 percent. Very interesting activity was found for some triterpenoid hydroperoxides, which is characterized as a treatment for the symptoms of dementia. The norlupane hydroperoxide shows activity for the treatment of dementia. It is interesting that the reliability of this activity was very high 97.2%. According to our preliminary data, the norlupane hydroperoxide is apparently the first natural metabolite that showed almost 100 percent activity for the treatment of dementia. However, to confirm these data requires practical and clinical experimental work.
Collapse
Affiliation(s)
- Vera A Vil
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, 119991, Moscow, Russia
| | - Alexander O Terent'ev
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, 119991, Moscow, Russia
| | - Nick Savidov
- Centre for Applied Research and Innovation, Lethbridge College, 3000 College Drive South Lethbridge, AB, T1K 1L6, Canada
| | | | | | - Tatyana A Pounina
- Far Eastern Geological Institute, Russian Academy of Sciences, 159 Prospect 100-letiya Vladivostoka, Vladivostok, 690022, Russia
| | - Valery M Dembitsky
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, 119991, Moscow, Russia; Centre for Applied Research and Innovation, Lethbridge College, 3000 College Drive South Lethbridge, AB, T1K 1L6, Canada; National Scientific Center of Marine Biology, 690041, Vladivostok, Russia.
| |
Collapse
|
94
|
Qin XJ, Rauwolf TJ, Li PP, Liu H, McNeely J, Hua Y, Liu HY, Porco JA. Isolation and Synthesis of Novel Meroterpenoids from Rhodomyrtus tomentosa: Investigation of a Reactive Enetrione Intermediate. Angew Chem Int Ed Engl 2019; 58:4291-4296. [PMID: 30681258 PMCID: PMC6583783 DOI: 10.1002/anie.201814421] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Indexed: 01/19/2023]
Abstract
Rhodomyrtusials A-C, the first examples of triketone-sesquiterpene meroterpenoids featuring a unique 6/5/5/9/4 fused pentacyclic ring system were isolated from Rhodomyrtus tomentosa, along with several biogenetically-related dihydropyran isomers. Two bis-furans and one dihydropyran isomer showed acetylcholinesterase (AChE) inhibitory activity. Structures of the isolates were unambiguously established by a combination of spectroscopic data, ECD analysis, and total synthesis. Bioinspired total syntheses of six isolates were achieved in six steps utilizing a reactive enetrione intermediate generated in situ from a readily available hydroxy-endoperoxide precursor.
Collapse
Affiliation(s)
- Xu-Jie Qin
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences Kunming 650201 (P. R. China)
| | - Tyler J. Rauwolf
- Department of Chemistry, Center for Molecular Discovery (BUCMD), Boston University 590 Commonwealth Avenue, Boston, MA 02215 (USA)
| | - Pan-Pan Li
- College of Forestry, Southwest Forestry University Kunming 650224 (P. R. China)
| | - Hui Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences Kunming 650201 (P. R. China)
| | - James McNeely
- Department of Chemistry, Center for Molecular Discovery (BUCMD), Boston University 590 Commonwealth Avenue, Boston, MA 02215 (USA)
| | - Yan Hua
- College of Forestry, Southwest Forestry University Kunming 650224 (P. R. China)
| | - Hai-Yang Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences Kunming 650201 (P. R. China)
| | - John A. Porco
- Department of Chemistry, Center for Molecular Discovery (BUCMD), Boston University 590 Commonwealth Avenue, Boston, MA 02215 (USA)
| |
Collapse
|
95
|
Alkynes as Synthetic Equivalents of Ketones and Aldehydes: A Hidden Entry into Carbonyl Chemistry. Molecules 2019; 24:molecules24061036. [PMID: 30875972 PMCID: PMC6471418 DOI: 10.3390/molecules24061036] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 03/08/2019] [Accepted: 03/11/2019] [Indexed: 11/16/2022] Open
Abstract
The high energy packed in alkyne functional group makes alkyne reactions highly thermodynamically favorable and generally irreversible. Furthermore, the presence of two orthogonal π-bonds that can be manipulated separately enables flexible synthetic cascades stemming from alkynes. Behind these "obvious" traits, there are other more subtle, often concealed aspects of this functional group's appeal. This review is focused on yet another interesting but underappreciated alkyne feature: the fact that the CC alkyne unit has the same oxidation state as the -CH2C(O)- unit of a typical carbonyl compound. Thus, "classic carbonyl chemistry" can be accessed through alkynes, and new transformations can be engineered by unmasking the hidden carbonyl nature of alkynes. The goal of this review is to illustrate the advantages of using alkynes as an entry point to carbonyl reactions while highlighting reports from the literature where, sometimes without full appreciation, the concept of using alkynes as a hidden entry into carbonyl chemistry has been applied.
Collapse
|
96
|
Chaudhari MB, Chaudhary A, Kumar V, Gnanaprakasam B. The Rearrangement of Peroxides for the Construction of Fluorophoric 1,4-Benzoxazin-3-one Derivatives. Org Lett 2019; 21:1617-1621. [DOI: 10.1021/acs.orglett.9b00155] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Moreshwar B. Chaudhari
- Department of Chemistry, Indian Institute of Science Education and Research, Pune-411008, Maharashtra, India
| | - Atul Chaudhary
- Department of Chemistry, Indian Institute of Science Education and Research, Pune-411008, Maharashtra, India
| | - Vishnupriya Kumar
- Department of Chemistry, Indian Institute of Science Education and Research, Pune-411008, Maharashtra, India
| | - Boopathy Gnanaprakasam
- Department of Chemistry, Indian Institute of Science Education and Research, Pune-411008, Maharashtra, India
| |
Collapse
|
97
|
Qin X, Rauwolf TJ, Li P, Liu H, McNeely J, Hua Y, Liu H, Porco JA. Isolation and Synthesis of Novel Meroterpenoids from
Rhodomyrtus tomentos
a: Investigation of a Reactive Enetrione Intermediate. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201814421] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Xu‐Jie Qin
- State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of Botany Chinese Academy of Sciences Kunming 650201 P. R. China
| | - Tyler J. Rauwolf
- Department of Chemistry Center for Molecular Discovery (BU-CMD) Boston University 590 Commonwealth Avenue Boston MA 02215 USA
| | - Pan‐Pan Li
- College of Forestry Southwest Forestry University Kunming 650224 P. R. China
| | - Hui Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of Botany Chinese Academy of Sciences Kunming 650201 P. R. China
| | - James McNeely
- Department of Chemistry Center for Molecular Discovery (BU-CMD) Boston University 590 Commonwealth Avenue Boston MA 02215 USA
| | - Yan Hua
- College of Forestry Southwest Forestry University Kunming 650224 P. R. China
| | - Hai‐Yang Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of Botany Chinese Academy of Sciences Kunming 650201 P. R. China
| | - John A. Porco
- Department of Chemistry Center for Molecular Discovery (BU-CMD) Boston University 590 Commonwealth Avenue Boston MA 02215 USA
| |
Collapse
|
98
|
Singh K, Bera T, Jaiswal V, Biswas S, Mondal B, Das D, Saha J. Lewis Acid Catalyzed Nucleophilic Ring Opening and 1,3-Bisfunctionalization of Donor-Acceptor Cyclopropanes with Hydroperoxides: Access to Highly Functionalized Peroxy/(α-Heteroatom Substituted)Peroxy Compounds. J Org Chem 2018; 84:710-725. [PMID: 30565925 DOI: 10.1021/acs.joc.8b02561] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The Lewis acid catalyzed ring opening reaction of Donor-Acceptor (D-A) cyclopropanes with alkyl hydroperoxides is reported to furnish various peroxycarbonyls and 1,3-haloperoxygenated compounds in good to excellent yields. This method adds another instance to scarcely reported noncyclilizing 1,3-bisfunctionalization of D-A cyclopropanes with two different functional groups and relies on the dual role of peroxide as nucleophile and oxidant through an orchestrated reaction sequence. The products obtained, including α-heterosubstituted peroxy compounds, are amenable to useful synthetic elaboration.
Collapse
Affiliation(s)
- Kuldeep Singh
- Division of Molecular Synthesis & Drug Discovery , Centre of Biomedical Research (CBMR) , SGPGIMS Campus. Raebareli Road , Lucknow 226014 Uttar Pradesh , India
| | - Tishyasoumya Bera
- Division of Molecular Synthesis & Drug Discovery , Centre of Biomedical Research (CBMR) , SGPGIMS Campus. Raebareli Road , Lucknow 226014 Uttar Pradesh , India
| | - Vandana Jaiswal
- Division of Molecular Synthesis & Drug Discovery , Centre of Biomedical Research (CBMR) , SGPGIMS Campus. Raebareli Road , Lucknow 226014 Uttar Pradesh , India
| | - Subrata Biswas
- Division of Molecular Synthesis & Drug Discovery , Centre of Biomedical Research (CBMR) , SGPGIMS Campus. Raebareli Road , Lucknow 226014 Uttar Pradesh , India
| | - Biplab Mondal
- Division of Molecular Synthesis & Drug Discovery , Centre of Biomedical Research (CBMR) , SGPGIMS Campus. Raebareli Road , Lucknow 226014 Uttar Pradesh , India
| | - Dinabandhu Das
- School of Physical Sciences , Jawaharlal Nehru University , New Delhi 110067 , India
| | - Jaideep Saha
- Division of Molecular Synthesis & Drug Discovery , Centre of Biomedical Research (CBMR) , SGPGIMS Campus. Raebareli Road , Lucknow 226014 Uttar Pradesh , India
| |
Collapse
|
99
|
Lu X, Bai Y, Li Y, Shi Y, Li L, Wu Y, Zhong F. Assembly of C3a-Peroxylated Pyrroloindolines via Interrupted Witkop Oxidation. Org Lett 2018; 20:7937-7941. [DOI: 10.1021/acs.orglett.8b03509] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Xunbo Lu
- Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan 430074, China
| | - Yulong Bai
- Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan 430074, China
| | - Yan Li
- Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan 430074, China
| | - Yufeng Shi
- Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan 430074, China
| | - Longjie Li
- Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan 430074, China
| | - Yuzhou Wu
- Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan 430074, China
| | - Fangrui Zhong
- Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan 430074, China
| |
Collapse
|
100
|
Mayer RJ, Ofial AR. Intramolecular Hydrogen-Bonding Modulates the Nucleophilic Reactivity of Ammonium-Peroxycarboxylates. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801158] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Robert J. Mayer
- Department Chemie; Ludwig-Maximilians-Universität München; Butenandtstraße 5-13 81377 München Germany
| | - Armin R. Ofial
- Department Chemie; Ludwig-Maximilians-Universität München; Butenandtstraße 5-13 81377 München Germany
| |
Collapse
|