1
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Ahmad F, Ranga PK, Fatma S, Vijaya Anand R. Domino Approach to Heterocycles-Based Unsymmetrical Triarylmethanes through Heteroannulation of 2-(2-Enynyl)-pyridines with Enaminones. J Org Chem 2024; 89:12104-12117. [PMID: 39137191 DOI: 10.1021/acs.joc.4c01006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/15/2024]
Abstract
Herein, we report a copper-catalyzed protocol to access unsymmetrical triarylmethanes containing both indolizine and the chromone scaffolds in the same molecule via a 5-endo-dig cyclization of 2-(2-enynyl)-pyridines followed by reaction with 2-hydroxyaryl enaminones. A variety of 2-hydroxyaryl enaminones and 2-(2-enynyl)-pyridines were subjected to reaction under the optimal reaction conditions, and the respective triarylmethanes were obtained in good to excellent yields.
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Affiliation(s)
- Feroz Ahmad
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER), Mohali, Sector 81, S.A.S. Nagar, Manauli (PO), Mohali 140306, Punjab, India
| | - Pavit K Ranga
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER), Mohali, Sector 81, S.A.S. Nagar, Manauli (PO), Mohali 140306, Punjab, India
| | - Shaheen Fatma
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER), Mohali, Sector 81, S.A.S. Nagar, Manauli (PO), Mohali 140306, Punjab, India
| | - Ramasamy Vijaya Anand
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER), Mohali, Sector 81, S.A.S. Nagar, Manauli (PO), Mohali 140306, Punjab, India
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2
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Saini N, Khajuria C, Biswas RG, Singh VK. Organocatalytic Asymmetric Cascade Michael-Acyl Transfer Reaction between 2-Fluoro-1,3-diketones and 2-Hydroxynitrostyrenes. J Org Chem 2024. [PMID: 38175926 DOI: 10.1021/acs.joc.3c02512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
An organocatalytic asymmetric cascade Michael-acyl transfer reaction of 2-hydroxynitrostyrenes and monofluorinated β-diketones has been developed employing a cooperative catalytic system. A combination of quinine-derived bifunctional squaramide catalyst and achiral hydrogen bond donor cocatalyst was found to be the most effective for this reaction and provided the fluorinated acyl transfer products in high yields with good diastereo- and excellent enantioselectivities. Synthetic transformations have been demonstrated, including the synthesis of functionalized 2,3-dihydrobenzofurans and 1-pyrroline.
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Affiliation(s)
- Nidhi Saini
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208 016, India
| | - Chhavi Khajuria
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208 016, India
| | - Rayhan G Biswas
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208 016, India
| | - Vinod K Singh
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208 016, India
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3
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Synthesis of functionalized flavones from 3-halo-2-(methylthio)-4H-chromen-4-ones. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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4
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Borodkin GI, Shubin VG. Electrophilic and Oxidative Fluorination of Heterocyclic Compounds: Contribution to Green Chemistry. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2021. [DOI: 10.1134/s1070428021090013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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5
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Meyer S, Häfliger J, Gilmour R. Expanding organofluorine chemical space: the design of chiral fluorinated isosteres enabled by I(i)/I(iii) catalysis. Chem Sci 2021; 12:10686-10695. [PMID: 34476053 PMCID: PMC8372324 DOI: 10.1039/d1sc02880d] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 06/28/2021] [Indexed: 12/12/2022] Open
Abstract
Short aliphatic groups are prevalent in bioactive small molecules and play an essential role in regulating physicochemistry and molecular recognition phenomena. Delineating their biological origins and significance have resulted in landmark developments in synthetic organic chemistry: Arigoni's venerable synthesis of the chiral methyl group is a personal favourite. Whilst radioisotopes allow the steric footprint of the native group to be preserved, this strategy was never intended for therapeutic chemotype development. In contrast, leveraging H → F bioisosterism provides scope to complement the chiral, radioactive bioisostere portfolio and to reach unexplored areas of chiral chemical space for small molecule drug discovery. Accelerated by advances in I(i)/I(iii) catalysis, the current arsenal of achiral 2D and 3D drug discovery modules is rapidly expanding to include chiral units with unprecedented topologies and van der Waals volumes. This Perspective surveys key developments in the design and synthesis of short multivicinal fluoroalkanes under the auspices of main group catalysis paradigms.
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Affiliation(s)
- Stephanie Meyer
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster Correnstraße 36 48149 Münster Germany
| | - Joel Häfliger
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster Correnstraße 36 48149 Münster Germany
| | - Ryan Gilmour
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster Correnstraße 36 48149 Münster Germany
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6
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Rozen S, Vints I, Lerner A, Hod O, Brothers EN, Moncho S. The Chemistry of Short-Lived α-Fluorocarbocations. J Org Chem 2021; 86:3882-3889. [PMID: 33615796 PMCID: PMC8023664 DOI: 10.1021/acs.joc.0c02731] [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] [Indexed: 11/29/2022]
Abstract
![]()
The present study of the chemistry
of short-lived α-fluorocarbocations
reveals that even inactive methyl carbons can serve as nucleophiles,
attacking a cationic center. This, in turn, facilitates the synthesis
of a cyclopropane ring in certain triterpene backbones. We report
the synthesis of compounds similar to 2, containing a
bridgehead cyclopropane, and compounds of type 3 with
an 11 membered bicyclic ring consisting of two bridgehead double bonds
(anti-Bredt) within a triterpene skeleton. The synthesis involves
three unconventional chemical processes: (a) a methyl group serving
as a nucleophile; (b) the unexpected and unprecedented synthesis of
a strained system in the absence of an external neighboring trigger;
and (c) the formation of an 11-membered bicyclic diene ring within
a triterpenoid skeleton. An α-fluorocarbocation mechanism is
proposed and supported by density functional theory calculations.
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Affiliation(s)
- Shlomo Rozen
- School of Chemistry, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Inna Vints
- School of Chemistry, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Ana Lerner
- School of Chemistry, Tel Aviv University, Tel Aviv 6997801, Israel.,Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Oded Hod
- Department of Physical Chemistry, School of Chemistry, The Raymond and Beverly Sackler Faculty of Exact Sciences and The Sackler Center for Computational Molecular and Materials Science, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Edward N Brothers
- Science Program, Texas A&M University at Qatar, Education City, Doha 23874, Qatar
| | - Salvador Moncho
- Science Program, Texas A&M University at Qatar, Education City, Doha 23874, Qatar
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7
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Alshammari MD, Kucheryavy PV, Ashpole NM, Colby DA. Synthesis, biological evaluation, and NMR studies of 3-fluorinated derivatives of 3',4',5'-trihydroxyflavone and 3',4',5'-trimethoxyflavone. Bioorg Med Chem Lett 2021; 32:127720. [PMID: 33259925 DOI: 10.1016/j.bmcl.2020.127720] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 11/18/2020] [Accepted: 11/23/2020] [Indexed: 10/22/2022]
Abstract
Flavones are valuable scaffolds in medicinal chemistry, especially as they display activity as antioxidants and neuroprotective agents. The need to incorporate a fluorine atom on flavones has driven much of the recent synthetic work in this area. We now report a route for the production of 3-fluorinated derivatives of 3',4',5'-trihydroxyflavone and 3',4',5'-trimethoxyflavone. Biological evaluation of these agents, along with their non-fluorinated counterparts, demonstrate that antioxidant activity may be enhanced whereas neuroprotective activity is conserved. Also, the 3-fluoro-3',4',5'-trihydroxyflavone can act as an NMR probe to detect structural changes during its action as a radical scavenger.
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Affiliation(s)
- Maali D Alshammari
- Department of BioMolecular Sciences, University of Mississippi, University, MS 38677, United States
| | - Pavel V Kucheryavy
- Department of BioMolecular Sciences, University of Mississippi, University, MS 38677, United States
| | - Nicole M Ashpole
- Department of BioMolecular Sciences, University of Mississippi, University, MS 38677, United States
| | - David A Colby
- Department of BioMolecular Sciences, University of Mississippi, University, MS 38677, United States.
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8
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Bock J, Guria S, Wedek V, Hennecke U. Enantioselective Dihalogenation of Alkenes. Chemistry 2021; 27:4517-4530. [DOI: 10.1002/chem.202003176] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Revised: 09/01/2020] [Indexed: 01/17/2023]
Affiliation(s)
- Jonathan Bock
- Organic Chemistry Research Group (ORGC) Department of Chemistry and Department of Bioengineering Sciences Vrije Universiteit Brussel (VUB) Pleinlaan 2 1050 Brussels Belgium
| | - Sudip Guria
- Organic Chemistry Research Group (ORGC) Department of Chemistry and Department of Bioengineering Sciences Vrije Universiteit Brussel (VUB) Pleinlaan 2 1050 Brussels Belgium
| | - Volker Wedek
- Organic Chemistry Research Group (ORGC) Department of Chemistry and Department of Bioengineering Sciences Vrije Universiteit Brussel (VUB) Pleinlaan 2 1050 Brussels Belgium
| | - Ulrich Hennecke
- Organic Chemistry Research Group (ORGC) Department of Chemistry and Department of Bioengineering Sciences Vrije Universiteit Brussel (VUB) Pleinlaan 2 1050 Brussels Belgium
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9
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Du K, Zhang Z, Sheng W. Copper-Catalyzed the Synthesis of 3-Trifluoromethylchromone via Trifluoromethyl Radical Addition Tandem Cyclization Reaction of 2-Hydroxyphenyl Enaminones. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202102007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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10
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Lennox AJJ, Doobary S. Alkene Vicinal Difluorination: From Fluorine Gas to More Favoured Conditions. Synlett 2020. [DOI: 10.1055/s-0040-1707143] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Vicinal difluorinated alkanes are entities relevant to medicinal chemistry that are accessed through the difluorination of alkenes. This reaction has advanced from the use of highly reactive and unsafe reagents, which provide poor functional-group tolerance and selectivity, to the use of safer and more selective reagents that facilitate access to a broader scope of substrates. In this review article, we describe the details of these developments.1 Introduction2 Strategy 1: Ambiphilic Fluorine Sources3 Strategy 2: Oxidant and Fluoride4 Conclusions and Outlook
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11
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Santos R, Pinto D, Magalhães C, Silva A. Halogenated Flavones and Isoflavones: A State-of-Art on their Synthesis. Curr Org Synth 2020; 17:415-425. [PMID: 32473000 DOI: 10.2174/1570179417666200530213737] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 05/04/2020] [Accepted: 05/04/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Flavonoid is a family of compounds present in the everyday consumption plants and fruits, contributing to a balanced diet and beneficial health effects. Being a scaffold for new drugs and presenting a wide range of applicability in the treatment of illnesses give them also an impact in medicine. Among the several types of flavonoids, flavone and isoflavone derivatives can be highlighted due to their prevalence in nature and biological activities already established. The standard synthetic route to obtain both halogenated flavones and isoflavones is through the use of already halogenated starting materials. Halogenation of the flavone and isoflavone core is less common because it is more complicated and involves some selectivity issues. OBJECTIVE Considering the importance of these flavonoids, we aim to present the main and more recent synthetic approaches towards their halogenation. METHODS The most prominent methodologies for the synthesis of halogenated flavones and isoflavones were reviewed. A careful survey of the reported data, using mainly the Scopus database and halogenation, flavones and isoflavones as keywords, was conducted. RESULTS Herein, a review is provided on the latest and more efficient halogenation protocols of flavones and isoflavones. Selective halogenation and the greener methodologies, including enzymatic and microbial halogenations, were reported. Nevertheless, some interesting protocols that allowed the synthesis of halogenated flavone and isoflavone derivatives in specific positions using halogenated reagents are also summarized. CONCLUSION Halogenated flavones and isoflavones have risen as noticeable structures; however, most of the time, the synthetic procedures involve toxic reagents and harsh reaction conditions. Therefore, the development of new synthetic routes with low environmental impact is desirable.
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Affiliation(s)
- Ricardo Santos
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Aveiro, Portugal
| | - Diana Pinto
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Aveiro, Portugal
| | - Clara Magalhães
- Department of Chemistry and CICECO, Universidade de Aveiro, Aveiro, Portugal
| | - Artur Silva
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, Aveiro, Portugal
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12
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Saha M, Das AR. Nanocrystalline ZnO: A Competent and Reusable Catalyst for the Preparation of Pharmacology Relevant Heterocycles in the Aqueous Medium. CURRENT GREEN CHEMISTRY 2020. [DOI: 10.2174/2213346107666200218122718] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
:Nanoparticle catalyzed synthesis is a green and convenient method to achieve most of the chemical transformations in water or other green solvents. Nanoparticle ensures an easy isolation process of catalyst as well as products from the reaction mixture avoiding the hectic work up procedure. Zinc oxide is a biocompatible, environmentally benign and economically viable nanocatalyst with effectivity comparable to the other metal nanocatalyst employed in several reaction strategies. This review mainly focuses on the recent applications of zinc oxide in the synthesis of biologically important heterocyclic molecules under sustainable reaction conditions.:Application of zinc oxide in organic synthesis: Considering the achievable advantages of this nanocatalyst, presently several research groups are paying attention in anchoring zincoxide or its modified structure in several types of organic conversions e.g. multicomponent reactions, ligand-free coupling reactions, cycloaddition reaction, etc. The advantages and limitations of this nanocatalyst are also demonstrated. The present study aims to highlight the recent multifaceted applications of ZnO towards the synthesis of diverse heterocyclic motifs. Being a promising biocompatible nanoparticle, this catalyst has an important contribution in the fields of synthetic chemistry and medicinal chemistry.
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Affiliation(s)
- Moumita Saha
- Department of Chemistry, University of Calcutta, Kolkata-700009, India
| | - Asish R. Das
- Department of Chemistry, University of Calcutta, Kolkata-700009, India
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13
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Zhao QL, Xia PJ, Zheng L, Xie ZZ, Hu YZ, Chen GJ, Chen XQ, Xiang HY, Yang H. A BHT-regulated chemoselective access to monofluorinated chromones. Tetrahedron 2020. [DOI: 10.1016/j.tet.2019.130833] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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14
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Kunde SP, Kanade KG, Karale BK, Akolkar HN, Randhavane PV, Shinde ST. Synthesis and characterization of nanostructured Cu-ZnO: An efficient catalyst for the preparation of (E)-3-styrylchromones. ARAB J CHEM 2019. [DOI: 10.1016/j.arabjc.2016.12.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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15
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Mrug GP, Biletska IM, Bondarenko SP, Sviripa VM, Frasinyuk MS. Trifluoroacetylation of 2‐Methyl‐ and 2‐Ethylchromones: A Convenient Access to 2‐Trifluoroacetonyl Chromones. ChemistrySelect 2019. [DOI: 10.1002/slct.201903629] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Galyna P. Mrug
- V. P. Kukhar Institute of Bioorganic Chemistry and PetrochemistryNational Academy of Science of Ukraine Kyiv 02094 Ukraine
| | - Iryna M. Biletska
- V. P. Kukhar Institute of Bioorganic Chemistry and PetrochemistryNational Academy of Science of Ukraine Kyiv 02094 Ukraine
| | | | - Vitaliy M. Sviripa
- Department of Pharmaceutical Sciences College of PharmacyUniversity of Kentucky Lexington KY 40536-0509 USA
- Center for Pharmaceutical Research and InnovationCollege of PharmacyUniversity of Kentucky Lexington KY 40536-0509 USA
| | - Mykhaylo S. Frasinyuk
- V. P. Kukhar Institute of Bioorganic Chemistry and PetrochemistryNational Academy of Science of Ukraine Kyiv 02094 Ukraine
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16
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Fu L, Wan J. C3‐Functionalized Chromones Synthesis by Tandem C−H Elaboration and Chromone Annulation of Enaminones. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900196] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Leiqing Fu
- College of Chemistry and Chemical EngineeringJiangxi Normal University Nanchang 330022 P. R. China
| | - Jie‐Ping Wan
- College of Chemistry and Chemical EngineeringJiangxi Normal University Nanchang 330022 P. R. China
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17
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Haj MK, Banik SM, Jacobsen EN. Catalytic, Enantioselective 1,2-Difluorination of Cinnamamides. Org Lett 2019; 21:4919-4923. [PMID: 30963766 DOI: 10.1021/acs.orglett.9b00938] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The enantio- and diastereoselective synthesis of 1,2-difluorides via chiral aryl iodide-catalyzed difluorination of cinnamamides is reported. The method uses HF-pyridine as a fluoride source and mCPBA as a stoichiometric oxidant to turn over catalyst, and affords compounds containing vicinal, fluoride-bearing stereocenters. Selectivity for 1,2-difluorination versus a rearrangement pathway resulting in 1,1-difluorination is enforced through anchimeric assistance from a N- tert-butyl amide substituent.
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Affiliation(s)
- Moriana K Haj
- Department of Chemistry and Chemical Biology , Harvard University , Cambridge , Massachusetts 02138 , United States
| | - Steven M Banik
- Department of Chemistry and Chemical Biology , Harvard University , Cambridge , Massachusetts 02138 , United States
| | - Eric N Jacobsen
- Department of Chemistry and Chemical Biology , Harvard University , Cambridge , Massachusetts 02138 , United States
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18
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Li K, Yao F, Xue Q, Fan H, Yang L, Li X, Sun L, Liu Y. Inhibitory effects against α-glucosidase and α-amylase of the flavonoids-rich extract from Scutellaria baicalensis shoots and interpretation of structure-activity relationship of its eight flavonoids by a refined assign-score method. Chem Cent J 2018; 12:82. [PMID: 30003449 PMCID: PMC6042199 DOI: 10.1186/s13065-018-0445-y] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Accepted: 06/22/2018] [Indexed: 01/04/2023] Open
Abstract
A flavonoids-rich extract of Scutellaria baicalensis shoots and its eight high content flavonoids were investigated for their inhibitory effects against α-glucosidase and α-amylase. Results show that abilities of the extract in inhibiting the two enzymes were obviously higher than those of acarbose. Moreover, inhibitory abilities of all the eight individual flavonoids against the two enzymes show exactly a same order (i.e., apigenin > baicalein > scutellarin > chrysin > apigenin-7-O-glucuronide > baicalin > chrysin-7-O-glucuronide > isocarthamidin-7-O-glucuronide), and their structure-activity relationship could be well-interpretated by the refined assign-score method. Furthermore, based on the inhibitory abilities and their contents in the extract, it was found that the eight flavonoids made predominant contributions, among which baicalein and scutellarin played roles as preliminary contributors, to overall inhibitory effects of the extract against the two enzymes. Beyond these, contributions of the eight flavonoids to the overall enzyme inhibitory activity were compared with those to the overall antioxidant activity characterized in our recent study, and it could be inferred that within the basic flavonoid structure the hydroxyl on C-4' of ring B was more effective than that on C-6 of ring A in enzyme inhibitory activities while they behaved inversely in antioxidant activities; scutellarin and apigenin contributed more to the overall enzyme inhibitory activity, and baicalin and scutellarin, to the overall antioxidant activity of the extract; and flavonoids of the extract, apart from directly inhibiting enzymes, might also be conducive to curing type 2 diabetes via scavenging various free radicals caused by increased oxidative stresses.
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Affiliation(s)
- Ke Li
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Biotechnology, Beijing Forestry University, Qinghuadonglu No. 35, Haidian District, Beijing, 100083, China
| | - Fan Yao
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Biotechnology, Beijing Forestry University, Qinghuadonglu No. 35, Haidian District, Beijing, 100083, China
| | - Qiang Xue
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Biotechnology, Beijing Forestry University, Qinghuadonglu No. 35, Haidian District, Beijing, 100083, China
| | - Hang Fan
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Biotechnology, Beijing Forestry University, Qinghuadonglu No. 35, Haidian District, Beijing, 100083, China
| | - Lingguang Yang
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Biotechnology, Beijing Forestry University, Qinghuadonglu No. 35, Haidian District, Beijing, 100083, China
| | - Xiang Li
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Biotechnology, Beijing Forestry University, Qinghuadonglu No. 35, Haidian District, Beijing, 100083, China
| | - Liwei Sun
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Biotechnology, Beijing Forestry University, Qinghuadonglu No. 35, Haidian District, Beijing, 100083, China
| | - Yujun Liu
- National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Biotechnology, Beijing Forestry University, Qinghuadonglu No. 35, Haidian District, Beijing, 100083, China.
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19
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Rai VK, Verma F, Sahu GP, Singh M, Rai A. One-Pot Allan-Robinson/Friedländer Route to Chromen-/Quinolin-4-ones through the Domino Acetylative Cyclisation of 2-Hydroxy-/2-Aminobenzaldehydes. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701435] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Vijai K. Rai
- Department of Chemistry; Guru Ghasidas Vishwavidyalaya; -495 009, C. G. Bilaspur India
| | - Fooleswar Verma
- Department of Chemistry; Guru Ghasidas Vishwavidyalaya; -495 009, C. G. Bilaspur India
| | - Ganeshwar P. Sahu
- Department of Chemistry; Guru Ghasidas Vishwavidyalaya; -495 009, C. G. Bilaspur India
| | - Manorama Singh
- Department of Chemistry; Guru Ghasidas Vishwavidyalaya; -495 009, C. G. Bilaspur India
| | - Ankita Rai
- School of Physical Sciences; Jawaharlal Nehru University; -110 027. New Delhi India
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20
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Wang R, Han J, Li C, Zhang J, Liang Y, Wang T, Zhang Z. One-pot synthesis of 3-fluoroflavones via 1-(2-hydroxyphenyl)-3-phenylpropane-1,3-diones and selectfluor at room temperature. Org Biomol Chem 2018; 16:2479-2488. [DOI: 10.1039/c8ob00135a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient one-pot synthesis of 3-fluoroflavones by the fluorination of 1-(2-hydroxyphenyl)-3-phenylpropane-1,3-diones with selectfluor followed by cyclization and dehydration in the presence of a trace amount of conc. H2SO4 at room temperature was developed.
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Affiliation(s)
- Rui Wang
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry
- National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China
- and School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710119
| | - Jie Han
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry
- National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China
- and School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710119
| | - Chenchen Li
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry
- National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China
- and School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710119
| | - Jie Zhang
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry
- National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China
- and School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710119
| | - Yong Liang
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry
- National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China
- and School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710119
| | - Tao Wang
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry
- National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China
- and School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710119
| | - Zunting Zhang
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry
- National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China
- and School of Chemistry and Chemical Engineering
- Shaanxi Normal University
- Xi'an 710119
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21
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Song Z, Huang X, Yi W, Zhang W. One-Pot Reactions for Modular Synthesis of Polysubstituted and Fused Pyridines. Org Lett 2016; 18:5640-5643. [DOI: 10.1021/acs.orglett.6b02883] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Zhidong Song
- School
of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China
| | - Xin Huang
- Department
of Chemistry, University of Massachusetts Boston, Boston, Massachusetts 02125, United States
| | - Wenbin Yi
- School
of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China
| | - Wei Zhang
- Department
of Chemistry, University of Massachusetts Boston, Boston, Massachusetts 02125, United States
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22
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Molnár IG, Thiehoff C, Holland MC, Gilmour R. Catalytic, Vicinal Difluorination of Olefins: Creating a Hybrid, Chiral Bioisostere of the Trifluoromethyl and Ethyl Groups. ACS Catal 2016. [DOI: 10.1021/acscatal.6b02155] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- István G. Molnár
- Institute
for Organic Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany
| | - Christian Thiehoff
- Institute
for Organic Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany
| | - Mareike C. Holland
- Institute
for Organic Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany
| | - Ryan Gilmour
- Institute
for Organic Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany
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23
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Abstract
We describe a direct, catalytic approach to the 1,2-difluorination of alkenes. The method utilizes a nucleophilic fluoride source and an oxidant in conjunction with an aryl iodide catalyst and is applicable to alkenes with all types of substitution patterns. In general, the vicinal difluoride products are produced with high diastereoselectivities. The observed sense of stereoinduction implicates anchimeric assistance pathways in reactions of alkenes bearing neighboring Lewis basic functionality.
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Affiliation(s)
| | | | - Eric N. Jacobsen
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
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24
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Tu B, Li RR, Liu ZJ, Chen ZF, Ouyang Y, Hu YJ. Structure-activity relationship study between baicalein and wogonin by spectrometry, molecular docking and microcalorimetry. Food Chem 2016; 208:192-8. [PMID: 27132840 DOI: 10.1016/j.foodchem.2016.04.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Revised: 03/06/2016] [Accepted: 04/04/2016] [Indexed: 11/25/2022]
Abstract
Flavones (e.g. baicalein and wogonin) extensively used worldwide in food preparation and traditional medicine. In this study, a systematically comparative study of their structure-activity relationships (SAR) on their interaction with BSA, antioxidant activity and antibacterial activity has been carried out by spectrometry, molecular docking and microcalorimetry. Our results show that the skeleton structure of flavones, the number of hydroxyl groups, the type of functional group, conjugated system and the steric hindrance may be responsible for their different biological activity. These findings not only would lay a scientific foundation for discovering and designing flavones-based food and drug, may also help us to understanding the structure-activity relationship between flavones at the molecular level.
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Affiliation(s)
- Bao Tu
- Hubei Collaborative Innovation Center for Rare Metal Chemistry, Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Department of Chemistry, Hubei Normal University, Huangshi 435002, PR China
| | - Rong-Rong Li
- Hubei Collaborative Innovation Center for Rare Metal Chemistry, Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Department of Chemistry, Hubei Normal University, Huangshi 435002, PR China
| | - Zhi-Juan Liu
- Hubei Collaborative Innovation Center for Rare Metal Chemistry, Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Department of Chemistry, Hubei Normal University, Huangshi 435002, PR China
| | - Zhi-Feng Chen
- Hubei Collaborative Innovation Center for Rare Metal Chemistry, Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Department of Chemistry, Hubei Normal University, Huangshi 435002, PR China
| | - Yu Ouyang
- Hubei Collaborative Innovation Center for Rare Metal Chemistry, Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Department of Chemistry, Hubei Normal University, Huangshi 435002, PR China
| | - Yan-Jun Hu
- Hubei Collaborative Innovation Center for Rare Metal Chemistry, Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Department of Chemistry, Hubei Normal University, Huangshi 435002, PR China.
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25
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Vints I, Rozen S. Fluorination of α,β-unsaturated carbonyl compounds using elemental fluorine. Tetrahedron 2016. [DOI: 10.1016/j.tet.2015.12.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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26
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Qi X, Li R, Wu XF. Selective palladium-catalyzed carbonylative synthesis of aurones with formic acid as the CO source. RSC Adv 2016. [DOI: 10.1039/c6ra13615j] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A general and practical strategy has been developed to prepare aurone derivatives.
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Affiliation(s)
- Xinxin Qi
- Department of Chemistry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- People's Republic of China
| | - Rui Li
- Department of Chemistry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- People's Republic of China
| | - Xiao-Feng Wu
- Department of Chemistry
- Zhejiang Sci-Tech University
- Hangzhou 310018
- People's Republic of China
- Leibniz-Institut für Katalyse e.V. an der Universit Rostock
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27
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Theoretical insight into the effect of fluorine substituents on the rearrangement step in Fischer indolisations. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.02.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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28
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Tu B, Chen ZF, Liu ZJ, Li RR, Ouyang Y, Hu YJ. Study of the structure-activity relationship of flavonoids based on their interaction with human serum albumin. RSC Adv 2015. [DOI: 10.1039/c5ra12824b] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The influence of functional groups on the interaction has been studied detailed here; fluorescence quenching degrees and the conformation change are considered through multiple methods; molecular docking has been introduced to verify related results.
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Affiliation(s)
- Bao Tu
- Hubei Collaborative Innovation Center for Rare Metal Chemistry
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology
- Department of Chemistry
- Hubei Normal University
- Huangshi 435002
| | - Zhi-Feng Chen
- Hubei Collaborative Innovation Center for Rare Metal Chemistry
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology
- Department of Chemistry
- Hubei Normal University
- Huangshi 435002
| | - Zhi-Juan Liu
- Hubei Collaborative Innovation Center for Rare Metal Chemistry
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology
- Department of Chemistry
- Hubei Normal University
- Huangshi 435002
| | - Rong-Rong Li
- Hubei Collaborative Innovation Center for Rare Metal Chemistry
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology
- Department of Chemistry
- Hubei Normal University
- Huangshi 435002
| | - Yu Ouyang
- Hubei Collaborative Innovation Center for Rare Metal Chemistry
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology
- Department of Chemistry
- Hubei Normal University
- Huangshi 435002
| | - Yan-Jun Hu
- Hubei Collaborative Innovation Center for Rare Metal Chemistry
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology
- Department of Chemistry
- Hubei Normal University
- Huangshi 435002
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29
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Liu C, Zhang Z, Zhang J, Liu X, Xie M. Regioselective Synthesis of Aurone Derivatives via PBu3-Catalyzed Cyclization of 2-Alkynoylphenols. CHINESE J CHEM 2014. [DOI: 10.1002/cjoc.201400597] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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