1
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Bag K, Pal AK, Basu S, Singla M, Sarkar B, Chatterji D, Maiti PK, Ghosh A, Jayaraman N. C-4-Modified Isotetrones Prevent Biofilm Growth and Persister Cell Resuscitation in Mycobacterium smegmatis. ACS OMEGA 2023; 8:20513-20523. [PMID: 37323400 PMCID: PMC10268289 DOI: 10.1021/acsomega.3c00822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 04/28/2023] [Indexed: 06/17/2023]
Abstract
Hyperphosphorylated nucleotide (p)ppGpp, synthesized by Rel protein, regulates the stringent response pathway responsible for biofilm and persister cell growth in mycobacteria. The discovery of vitamin C as an inhibitor of Rel protein activities raises the prospect of tetrone lactones to prevent such pathways. The closely related isotetrone lactone derivatives are identified herein as inhibitors of the above processes in a mycobacterium. Synthesis and biochemical evaluations show that an isotetrone possessing phenyl substituent at C-4 inhibit the biofilm formation at 400 μg mL-1, 84 h post-exposure, followed by moderate inhibition by the isotetrone possessing the p-hydroxyphenyl substituent. The latter isotetrone inhibits the growth of persister cells at 400 μg mL-1 f.c. when monitored for 2 weeks, under PBS starvation. Isotetrones also potentiate the inhibition of antibiotic-tolerant regrowth of cells by ciprofloxacin (0.75 μg mL-1) and thus act as bioenhancers. Molecular dynamics studies show that isotetrone derivatives bind to the RelMsm protein more efficiently than vitamin C at a binding site possessing serine, threonine, lysine, and arginine.
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Affiliation(s)
- Kingshuk Bag
- Department
of Organic Chemistry, Indian Institute of
Science, Bangalore 560 012, India
| | - Aditya Kumar Pal
- Molecular
Biophysics Unit, Indian Institute of Science, Bangalore 560 012, India
| | - Subhadip Basu
- Department
of Physics, Indian Institute of Science, Bangalore 560 012, India
| | - Mamta Singla
- Molecular
Biophysics Unit, Indian Institute of Science, Bangalore 560 012, India
| | - Biplab Sarkar
- Molecular
Biophysics Unit, Indian Institute of Science, Bangalore 560 012, India
| | - Dipankar Chatterji
- Molecular
Biophysics Unit, Indian Institute of Science, Bangalore 560 012, India
| | - Prabal Kumar Maiti
- Department
of Physics, Indian Institute of Science, Bangalore 560 012, India
| | - Anirban Ghosh
- Molecular
Biophysics Unit, Indian Institute of Science, Bangalore 560 012, India
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2
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Reynard G, Wimmer E, Richelet J, Fourquez JM, Lebel H. Chemoselective borylation of bromoiodoarene in continuous flow: synthesis of bromoarylboronic acids. J Flow Chem 2022. [DOI: 10.1007/s41981-022-00246-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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3
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Ahmed A, Sakander N, Rasool F, Hussain N, Mukherjee D. Diastereoselective synthesis of glycopyrans 1,2-annulated with dioxazinanes from 1,2-anhydrosugars and N-substituted nitrones. Org Biomol Chem 2022; 20:1436-1443. [PMID: 35081611 DOI: 10.1039/d1ob02310a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
1,2-Annulated pyranose sugars fused with six membered rings have emerged as an important class of carbohydrates with wide biological and synthetic utility. We now describe zinc chloride catalyzed one pot diastereoselective synthesis of sugar fused dioxazinanes from 1,2-anhydro sugars and N-substituted aromatic nitrones. Various aromatic nitrones with different substituents undergo the reaction smoothly. The developed strategy works well with both ester and ether protection on the sugar and proceeds under mild reaction conditions. The mechanism seems to involve activation of the anhydrosugar by ZnCl2 for nucleophilic attack by the nitrone followed by cyclization.
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Affiliation(s)
- Ajaz Ahmed
- Natural Product and Medicinal Chemistry Division, Indian Institute of Integrative Medicine (IIIM), Jammu-180001, India. .,Academy of Scientific and Innovative Research (AcSIR-IIIM), Jammu-180001, India
| | - Norein Sakander
- Natural Product and Medicinal Chemistry Division, Indian Institute of Integrative Medicine (IIIM), Jammu-180001, India. .,Academy of Scientific and Innovative Research (AcSIR-IIIM), Jammu-180001, India
| | - Faheem Rasool
- Natural Product and Medicinal Chemistry Division, Indian Institute of Integrative Medicine (IIIM), Jammu-180001, India. .,Department of Chemistry, Govt. College for Women, Parade Ground, Jammu-180001, India.,Higher Education Department, Govt. of Jammu and Kashmir, India
| | - Nazar Hussain
- Natural Product and Medicinal Chemistry Division, Indian Institute of Integrative Medicine (IIIM), Jammu-180001, India. .,Department of Medicinal Chemistry, Faculty of Ayurveda, Instituteof Medical Sciences, Banaras Hindu University, Varanasi-221005, India
| | - Debaraj Mukherjee
- Natural Product and Medicinal Chemistry Division, Indian Institute of Integrative Medicine (IIIM), Jammu-180001, India. .,Academy of Scientific and Innovative Research (AcSIR-IIIM), Jammu-180001, India
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4
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Peng X, Yao M, Xiao P. Newly Synthesized Chromophore‐linked Iodonium Salts as Photoinitiators of Free Radical Photopolymerization. MACROMOL CHEM PHYS 2021. [DOI: 10.1002/macp.202100035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- X. Peng
- Research School of Chemistry Australian National University Canberra ACT 2601 Australia
| | - M. Yao
- Research School of Chemistry Australian National University Canberra ACT 2601 Australia
| | - P. Xiao
- Research School of Chemistry Australian National University Canberra ACT 2601 Australia
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5
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Gamidi RK, Dandawate M, Tothadi S, Choudhury R, Nangia AK, Reddy DS. Separation of a diastereomeric diol pair using the mechanical properties of crystals. CrystEngComm 2021. [DOI: 10.1039/d1ce01055g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The visually indistinguishable acicular crystals of a (2S,3R/S)-3-ethyl-1-phenylhex-5-ene-2,3-diol (ephd) diastereomeric pair are separated via the mechanical response based on elastic (2S,3R, right) and brittle (2S,3S, left) crystals.
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Affiliation(s)
- Rama Krishna Gamidi
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
| | - Monica Dandawate
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
| | - Srinu Tothadi
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
| | - Rahul Choudhury
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Ashwini K. Nangia
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
| | - D. Srinivasa Reddy
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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6
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Álvarez JM, Jorge ZD, Massanet GM. Study of the Oxidative Cleavage Proposed in the Biogenesis of Transtaganolides/Basiliolides: Pyran-2-one Aromaticity-Mediated Regioselective Control and Biogenetic Implications. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- José María Álvarez
- Department of Organic Chemistry; University of Cádiz; 11510 Puerto Real Spain
| | - Zacarías D. Jorge
- Department of Organic Chemistry; University of Cádiz; 11510 Puerto Real Spain
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7
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Design of Iodonium Salts for UV or Near-UV LEDs for Photoacid Generator and Polymerization Purposes. Molecules 2019; 25:molecules25010149. [PMID: 31905900 PMCID: PMC6982746 DOI: 10.3390/molecules25010149] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Accepted: 12/27/2019] [Indexed: 11/16/2022] Open
Abstract
Iodonium salts are well established photoacid generators, cationic photoinitiators, as well as additives commonly used in photoredox catalytic cycles. However, as a strong limitation, iodonium salts are characterized by low light absorption properties for λ > 300 nm so that these latter cannot be activated with cheap, safe, and eco-friendly near UV or even visible light emitting diodes (LEDs). To overcome this drawback, the covalent linkage of an iodonium salt to a chromophore absorbing at longer wavelength is actively researched. With aim at red-shifting the absorption spectrum of the iodonium salt, the synthesis of new compounds combining within a unique chemical structure both the chromophore (here the naphthalimide scaffold) and the iodonium salt is presented. By mean of this strategy, a polymerization could be initiated at 365 nm with the modified iodonium salts whereas no polymerization could be induced with the benchmark iodonium salt i.e., Speedcure 938 at this specific wavelength. To examine the effect of the counter-anion on the photoinitiating ability of these different salts, five different counter-anions were used. Comparison between the different anions revealed the bis(trifluoromethane)sulfonimide salt to exhibit the best photoinitiating ability in both the free radical polymerization of acrylates and the cationic polymerization of epoxides. To support the experimental results, molecular orbital calculations have been carried out. By theoretical calculations, the initiating species resulting from the photocleavage of the iodonium salts could be determined. The cleavage selectivity and the photochemical reactivity of the new iodoniums are also discussed.
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8
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Gayler KM, Lambert KM, Wood JL. Synthetic studies towards the penicisulfuranols: Synthesis of an advanced spirocyclic diketopiperazine intermediate. Tetrahedron 2019; 75:3154-3159. [PMID: 31258206 PMCID: PMC6599588 DOI: 10.1016/j.tet.2019.01.032] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The 2,5-diketopiperazine (DKP) moiety is a core feature of many natural products and medicinally relevant scaffolds. As part of our efforts directed towards a total synthesis of penicisulfuranol B, we have developed and report herein: (1) the preparation of an N-hydroxy diketopiperazine intermediate accessible via a molybdenum-mediated oxidation of a parent diketopiperazine, and (2) further synthetic studies leading to a novel spirocyclic dihydrobenzofuran-containing diketopiperazine.
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Affiliation(s)
- Kevin M. Gayler
- Department of Chemistry and Biochemistry, Baylor University, Waco, TX, 76798, USA
| | - Kyle M. Lambert
- Department of Chemistry and Biochemistry, Baylor University, Waco, TX, 76798, USA
| | - John L. Wood
- Department of Chemistry and Biochemistry, Baylor University, Waco, TX, 76798, USA
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9
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Chen H, Han J, Wang L. Intramolecular Aryl Migration of Diaryliodonium Salts: Access to ortho
-Iodo Diaryl Ethers. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806405] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Huangguan Chen
- Key Laboratory for Advanced Materials; Institute of Fine Chemicals, School of Chemistry & Molecular Engineering; East China University of Science and Technology; 130 Meilong Road Shanghai 200237 China
| | - Jianwei Han
- Key Laboratory for Advanced Materials; Institute of Fine Chemicals, School of Chemistry & Molecular Engineering; East China University of Science and Technology; 130 Meilong Road Shanghai 200237 China
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis; Shanghai Institute of Organic Chemistry; The Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Limin Wang
- Key Laboratory for Advanced Materials; Institute of Fine Chemicals, School of Chemistry & Molecular Engineering; East China University of Science and Technology; 130 Meilong Road Shanghai 200237 China
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10
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Chen H, Han J, Wang L. Intramolecular Aryl Migration of Diaryliodonium Salts: Access to ortho-Iodo Diaryl Ethers. Angew Chem Int Ed Engl 2018; 57:12313-12317. [PMID: 30137685 DOI: 10.1002/anie.201806405] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 06/28/2018] [Indexed: 11/07/2022]
Abstract
By using vicinal trifluoromethanesulfonate-substituted diaryliodonium salts, a novel approach was developed for the synthesis of ortho-iodo diaryl ethers by intramolecular aryl migration. The reaction conditions are mild with a broad substrate scope. Mechanistic insight suggests a sulfonyl-directed nucleophilic aromatic substitution pathway. Additionally, the product ortho-iodo diaryl ethers serve as versatile synthons as demonstrated with several coupling reactions. Furthermore, a useful thyroxine analogue of the 3-iodo-l-thyronine (3-T1 ) derivative was synthesized by this aryl migration procedure.
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Affiliation(s)
- Huangguan Chen
- Key Laboratory for Advanced Materials, Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
| | - Jianwei Han
- Key Laboratory for Advanced Materials, Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
- Shanghai-Hong Kong Joint Laboratory in Chemical Synthesis, Shanghai Institute of Organic Chemistry, The Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Limin Wang
- Key Laboratory for Advanced Materials, Institute of Fine Chemicals, School of Chemistry & Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, China
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11
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Zhang SB, Huang Y, Chen HP, Li ZH, Wu B, Feng T, Liu JK. Confluenines A–F, N -oxidized l -isoleucine derivatives from the edible mushroom Albatrellus confluens. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.07.033] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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12
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Elbatrawi YM, Kang CW, Del Valle JR. Total Synthesis of L-156,373 and an oxoPiz Analogue via a Submonomer Approach. Org Lett 2018; 20:2707-2710. [DOI: 10.1021/acs.orglett.8b00912] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yassin M. Elbatrawi
- Department of Chemistry, University of South Florida, Tampa, Florida 33620, United States
| | - Chang Won Kang
- Department of Chemistry, University of South Florida, Tampa, Florida 33620, United States
| | - Juan R. Del Valle
- Department of Chemistry, University of South Florida, Tampa, Florida 33620, United States
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13
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Williams DE, Gunasekara NW, Ratnaweera PB, Zheng Z, Ellis S, Dada S, Patrick BO, Wijesundera RLC, Nanayakkara CM, Jefferies WA, de Silva ED, Andersen RJ. Serpulanines A to C, N-Oxidized Tyrosine Derivatives Isolated from the Sri Lankan Fungus Serpula sp.: Structure Elucidation, Synthesis, and Histone Deacetylase Inhibition. JOURNAL OF NATURAL PRODUCTS 2018; 81:78-84. [PMID: 29303267 DOI: 10.1021/acs.jnatprod.7b00680] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Serpulanines A (1), B (2), and C (3) have been isolated from extracts of the rare Sri Lankan macrofungus Serpula sp. The structures of 1, 2, and 3 were elucidated by a combination of spectroscopic and single-crystal X-ray diffraction analyses. Serpulanines A (1) and B (2) both contain the rare (E)-2-hydroxyimino hydroxamic acid functional group array. A proposed biogenesis for serpulanine B (2) suggests that its (E)-2-hydroxyimino hydroxamic acid moiety arises from a diketopiperazine precursor. Synthetic serpulanine A (1) inhibited class I/II histone deacetylases in murine metastatic lung carcinoma cells with an IC50 of 7 μM.
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Affiliation(s)
- David E Williams
- Departments of Chemistry and Earth, Ocean & Atmospheric Sciences, University of British Columbia , 2036 Main Mall, Vancouver, BC, Canada V6T 1Z1
| | - Niranjan W Gunasekara
- Departments of Chemistry and Plant Science, University of Colombo , Colombo 03, Sri Lanka
| | - Pamoda B Ratnaweera
- Departments of Chemistry and Earth, Ocean & Atmospheric Sciences, University of British Columbia , 2036 Main Mall, Vancouver, BC, Canada V6T 1Z1
- Departments of Chemistry and Plant Science, University of Colombo , Colombo 03, Sri Lanka
- Department of Science and Technology, Uva Wellassa University , Badulla, Sri Lanka
| | - Zehua Zheng
- Departments of Chemistry and Earth, Ocean & Atmospheric Sciences, University of British Columbia , 2036 Main Mall, Vancouver, BC, Canada V6T 1Z1
| | - Samantha Ellis
- The Michael Smith Laboratories; Vancouver Prostate Centre; Departments of Medical Genetics, Microbiology & Immunology, and Zoology; and The Centre for Blood Research and Djavad Mowafaghian Centre for Brain Health, University of British Columbia , Vancouver, BC, Canada
| | - Sarah Dada
- The Michael Smith Laboratories; Vancouver Prostate Centre; Departments of Medical Genetics, Microbiology & Immunology, and Zoology; and The Centre for Blood Research and Djavad Mowafaghian Centre for Brain Health, University of British Columbia , Vancouver, BC, Canada
| | - Brian O Patrick
- Department of Chemistry, University of British Columbia , 2036 Main Mall, Vancouver, BC, Canada V6T 1Z1
| | - Ravi L C Wijesundera
- Departments of Chemistry and Plant Science, University of Colombo , Colombo 03, Sri Lanka
| | | | - Wilfred A Jefferies
- The Michael Smith Laboratories; Vancouver Prostate Centre; Departments of Medical Genetics, Microbiology & Immunology, and Zoology; and The Centre for Blood Research and Djavad Mowafaghian Centre for Brain Health, University of British Columbia , Vancouver, BC, Canada
| | - E Dilip de Silva
- Departments of Chemistry and Plant Science, University of Colombo , Colombo 03, Sri Lanka
| | - Raymond J Andersen
- Departments of Chemistry and Earth, Ocean & Atmospheric Sciences, University of British Columbia , 2036 Main Mall, Vancouver, BC, Canada V6T 1Z1
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14
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Shang W, Mou ZD, Tang H, Zhang X, Liu J, Fu Z, Niu D. Site-Selective O-Arylation of Glycosides. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201710310] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Weidong Shang
- State Key Laboratory of Biotherapy and Cancer Center; West China Hospital and School of Chemical Engineering; Sichuan University; No. 17 Renmin Nan Road Chengdu 610041 China
| | - Ze-Dong Mou
- State Key Laboratory of Biotherapy and Cancer Center; West China Hospital and School of Chemical Engineering; Sichuan University; No. 17 Renmin Nan Road Chengdu 610041 China
| | - Hua Tang
- State Key Laboratory of Biotherapy and Cancer Center; West China Hospital and School of Chemical Engineering; Sichuan University; No. 17 Renmin Nan Road Chengdu 610041 China
| | - Xia Zhang
- State Key Laboratory of Biotherapy and Cancer Center; West China Hospital and School of Chemical Engineering; Sichuan University; No. 17 Renmin Nan Road Chengdu 610041 China
| | - Jie Liu
- State Key Laboratory of Biotherapy and Cancer Center; West China Hospital and School of Chemical Engineering; Sichuan University; No. 17 Renmin Nan Road Chengdu 610041 China
| | - Zhengyan Fu
- State Key Laboratory of Biotherapy and Cancer Center; West China Hospital and School of Chemical Engineering; Sichuan University; No. 17 Renmin Nan Road Chengdu 610041 China
| | - Dawen Niu
- State Key Laboratory of Biotherapy and Cancer Center; West China Hospital and School of Chemical Engineering; Sichuan University; No. 17 Renmin Nan Road Chengdu 610041 China
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15
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Shang W, Mou ZD, Tang H, Zhang X, Liu J, Fu Z, Niu D. Site-Selective O-Arylation of Glycosides. Angew Chem Int Ed Engl 2017; 57:314-318. [PMID: 29125221 DOI: 10.1002/anie.201710310] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Indexed: 02/05/2023]
Affiliation(s)
- Weidong Shang
- State Key Laboratory of Biotherapy and Cancer Center; West China Hospital and School of Chemical Engineering; Sichuan University; No. 17 Renmin Nan Road Chengdu 610041 China
| | - Ze-Dong Mou
- State Key Laboratory of Biotherapy and Cancer Center; West China Hospital and School of Chemical Engineering; Sichuan University; No. 17 Renmin Nan Road Chengdu 610041 China
| | - Hua Tang
- State Key Laboratory of Biotherapy and Cancer Center; West China Hospital and School of Chemical Engineering; Sichuan University; No. 17 Renmin Nan Road Chengdu 610041 China
| | - Xia Zhang
- State Key Laboratory of Biotherapy and Cancer Center; West China Hospital and School of Chemical Engineering; Sichuan University; No. 17 Renmin Nan Road Chengdu 610041 China
| | - Jie Liu
- State Key Laboratory of Biotherapy and Cancer Center; West China Hospital and School of Chemical Engineering; Sichuan University; No. 17 Renmin Nan Road Chengdu 610041 China
| | - Zhengyan Fu
- State Key Laboratory of Biotherapy and Cancer Center; West China Hospital and School of Chemical Engineering; Sichuan University; No. 17 Renmin Nan Road Chengdu 610041 China
| | - Dawen Niu
- State Key Laboratory of Biotherapy and Cancer Center; West China Hospital and School of Chemical Engineering; Sichuan University; No. 17 Renmin Nan Road Chengdu 610041 China
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16
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Davison EK, Sperry J. Natural Products with Heteroatom-Rich Ring Systems. JOURNAL OF NATURAL PRODUCTS 2017; 80:3060-3079. [PMID: 29135244 DOI: 10.1021/acs.jnatprod.7b00575] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
This review focuses on all known natural products that contain a "heteroatom-rich" ring system, specifically a five-, six- or seven-membered ring that contains three or more heteroatoms. The isolation and biological activity of these natural products is discussed, along with the biosynthetic processes that Nature employs to assemble these rare heterocyclic frameworks.
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Affiliation(s)
- Emma K Davison
- School of Chemical Sciences, University of Auckland , 23 Symonds Street, Auckland 1142, New Zealand
| | - Jonathan Sperry
- School of Chemical Sciences, University of Auckland , 23 Symonds Street, Auckland 1142, New Zealand
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17
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Wang HS, Li HJ, Nan X, Luo YY, Wu YC. Enantiospecific Semisynthesis of Puupehedione-Type Marine Natural Products. J Org Chem 2017; 82:12914-12919. [DOI: 10.1021/acs.joc.7b02413] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hong-Shuang Wang
- School
of Marine Science and Technology, Harbin Institute of Technology, Weihai 264209, China
| | - Hui-Jing Li
- School
of Marine Science and Technology, Harbin Institute of Technology, Weihai 264209, China
| | - Xiang Nan
- School
of Marine Science and Technology, Harbin Institute of Technology, Weihai 264209, China
| | - Yuan-Yuan Luo
- School
of Marine Science and Technology, Harbin Institute of Technology, Weihai 264209, China
| | - Yan-Chao Wu
- School
of Marine Science and Technology, Harbin Institute of Technology, Weihai 264209, China
- Beijing
National Laboratory for Molecular Sciences, ICCAS, Beijing 100190, China
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18
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Takahashi S, Suda Y, Nakamura T, Matsuoka K, Koshino H. Total Synthesis of Kehokorins A-E, Cytotoxic p-Terphenyls. J Org Chem 2017; 82:3159-3166. [PMID: 28267327 DOI: 10.1021/acs.joc.7b00147] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
This paper describes a general method for the synthesis of kehokorins A-E, novel cytotoxic p-terphenyls. 2,4,6-Trihydroxybenzaldehyde served as a common building block for preparation of the central aromatic ring. Construction of their p-terphenyl skeletons was achieved by a stepwise Suzuki-Miyaura coupling, whereas the phenyldibenzofuran moiety was built up by an intramolecular Ullmann reaction. Introduction of an l-rhamnose residue into partly protected kehokorin B was performed by the trichloroacetimidate method.
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Affiliation(s)
- Shunya Takahashi
- RIKEN Center for Sustainable Resource Science , Wako, Saitama 351-0198, Japan
| | - Yasuaki Suda
- RIKEN Center for Sustainable Resource Science , Wako, Saitama 351-0198, Japan.,Division of Material Science, Graduate School of Science and Engineering, Saitama University , Saitama 338-8570, Japan
| | - Takemichi Nakamura
- RIKEN Center for Sustainable Resource Science , Wako, Saitama 351-0198, Japan
| | - Koji Matsuoka
- Division of Material Science, Graduate School of Science and Engineering, Saitama University , Saitama 338-8570, Japan
| | - Hiroyuki Koshino
- RIKEN Center for Sustainable Resource Science , Wako, Saitama 351-0198, Japan
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19
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Wani IA, Sayyad M, Ghorai MK. Domino ring-opening cyclization (DROC) of activated aziridines and epoxides with nitrones via dual-catalysis “on water”. Chem Commun (Camb) 2017; 53:4386-4389. [DOI: 10.1039/c7cc01033h] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple and green approach for the synthesis of non-racemic 1,2,4-oxadiazinanes and 1,4,2-dioxazinanes with excellent yields (up to 99%) and stereoselectivity (de/ee > 99%) in water has been described.
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Affiliation(s)
| | | | - Manas K. Ghorai
- Department of Chemistry
- Indian Institute of Technology
- Kanpur 208016
- India
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20
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Secondary Metabolites from Higher Fungi. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 106 2017; 106:1-201. [DOI: 10.1007/978-3-319-59542-9_1] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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21
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Liu Y, Ao J, Paladhi S, Song CE, Yan H. Organocatalytic Asymmetric Synthesis of Chiral Dioxazinanes and Dioxazepanes with in Situ Generated Nitrones via a Tandem Reaction Pathway Using a Cooperative Cation Binding Catalyst. J Am Chem Soc 2016; 138:16486-16492. [DOI: 10.1021/jacs.6b10660] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yidong Liu
- Innovative
Drug Research Centre (IDRC), School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Jun Ao
- Innovative
Drug Research Centre (IDRC), School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Sushovan Paladhi
- Department
of Chemistry, Sungkyunkwan University, Suwon 440-746, Korea
| | - Choong Eui Song
- Department
of Chemistry, Sungkyunkwan University, Suwon 440-746, Korea
| | - Hailong Yan
- Innovative
Drug Research Centre (IDRC), School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
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22
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Huang Z, Lumb JP. A Catalyst-Controlled Aerobic Coupling ofortho-Quinones and Phenols Applied to the Synthesis of Aryl Ethers. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201606359] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Zheng Huang
- Department of Chemistry; McGill University; 801 Sherbrooke Street West Montreal Quebec H3A 0B8 Canada
| | - Jean-Philip Lumb
- Department of Chemistry; McGill University; 801 Sherbrooke Street West Montreal Quebec H3A 0B8 Canada
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23
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Huang Z, Lumb JP. A Catalyst-Controlled Aerobic Coupling of ortho-Quinones and Phenols Applied to the Synthesis of Aryl Ethers. Angew Chem Int Ed Engl 2016; 55:11543-7. [PMID: 27513295 DOI: 10.1002/anie.201606359] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Indexed: 01/08/2023]
Abstract
ortho-Quinones are underutilized six-carbon-atom building blocks. We herein describe an approach for controlling their reactivity with copper that gives rise to a catalytic aerobic cross-coupling with phenols. The resulting aryl ethers are generated in high yield across a broad substrate scope under mild conditions. This method represents a unique example where the covalent modification of an ortho-quinone is catalyzed by a transition metal, creating new opportunities for their utilization in synthesis.
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Affiliation(s)
- Zheng Huang
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec, H3A 0B8, Canada
| | - Jean-Philip Lumb
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec, H3A 0B8, Canada.
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24
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Gräßle S, Vanderheiden S, Hodapp P, Bulat B, Nieger M, Jung N, Bräse S. Solid Phase Synthesis of (Benzannelated) Six-Membered Heterocycles via Cyclative Cleavage of Resin-Bound Pseudo-Oxazolones. Org Lett 2016; 18:3598-601. [PMID: 27399339 DOI: 10.1021/acs.orglett.6b01609] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A solid supported procedure for the synthesis of benzoxazinones, dihydropyrazinones, quinoxalinones, and dihydrooxazinones using immobilized oxazolones in combination with difunctional nucleophiles as cleavage agent is presented. The scope of the novel method has been demonstrated through subsequent modification of the parent oxazolone scaffold on solid supports using conversions with electrophiles or CuAAC reactions to give functionalized pyrazin-2-ones. The described method allows the synthesis of the target heterocycles in good yields via three to five steps on solid phases with only one chromatographic purification step.
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Affiliation(s)
- Simone Gräßle
- Institute of Toxicology and Genetics, Karlsruhe Institute of Technology , Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Sylvia Vanderheiden
- Institute of Organic Chemistry, Karlsruhe Institute of Technology , Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany
| | - Patrick Hodapp
- Institute of Toxicology and Genetics, Karlsruhe Institute of Technology , Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Bekir Bulat
- Institute of Toxicology and Genetics, Karlsruhe Institute of Technology , Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Martin Nieger
- Laboratory of Inorganic Chemistry, Department of Chemistry, University of Helsinki , P.O Box 55, A. I. Virtasen aukio 1, 00014 Helsinki, Finland
| | - Nicole Jung
- Institute of Toxicology and Genetics, Karlsruhe Institute of Technology , Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.,Institute of Organic Chemistry, Karlsruhe Institute of Technology , Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany
| | - Stefan Bräse
- Institute of Toxicology and Genetics, Karlsruhe Institute of Technology , Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.,Institute of Organic Chemistry, Karlsruhe Institute of Technology , Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany
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25
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Katayama K, Hirotsu M, Ito A, Teki Y. Fluorescence behaviour of an anthracene-BODIPY system affected by spin states of a dioxolene-cobalt centre. Dalton Trans 2016; 45:10165-72. [PMID: 27075418 DOI: 10.1039/c6dt00864j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dioxolene cobalt complexes, [Co(L)(TPA)]PF6 () and [Co(L)(Me3TPA)]PF6 (), were synthesized using a catechol with anthracene and boron-dipyrromethene (BODIPY), H2L, and tris(pyridin-2-ylmethyl)amine (TPA) or tris[(6-methylpyridin-2-yl)methyl]amine (Me3TPA) and characterised by UV-vis absorption, IR and NMR spectroscopy. Complexes and are a low-spin cobalt(iii) catecholate form and a high-spin cobalt(ii) semiquinonate form, respectively, in CH3CN at room temperature. The effect of the spin states of the dioxolene-cobalt centre on fluorescence was investigated in CH3CN at room temperature. The fluorescence intensity of was clearly lower than that of , although both complexes showed weaker fluorescence compared with that of H2L. The difference in the intensity between and is mainly due to the enhancement of nonradiative decay processes based on the stronger metal-ligand interactions for the cobalt(iii) catecholate form of compared with the cobalt(ii) semiquinonate form of .
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Affiliation(s)
- Koichi Katayama
- Division of Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan.
| | - Masakazu Hirotsu
- Division of Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan.
| | - Akitaka Ito
- Division of Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan.
| | - Yoshio Teki
- Division of Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan.
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26
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Vidyasagar A, Sureshan KM. Total syntheses of five uvacalols: structural validation of uvacalol A, uvacalol B and uvacalol C and disproval of the structures of uvacalol E and uvacalol G. Org Biomol Chem 2015; 13:3900-10. [PMID: 25655990 DOI: 10.1039/c4ob02663b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Uvacalols are novel carbasugars belonging to the family of C7-cyclitols, and are isolated from the roots of the medicinal plant, Uvaria calamistrata. In this study, we report the first syntheses of five uvacalols starting from a cheap and easily available chiral pool starting material, D-mannitol, in their optically pure form. D-Mannitol was converted to the alkene 2 through a series of regioselective and chemoselective transformations by following our previously reported strategies. Alkene 2 was converted to the enal 5 through a series of protective group manipulations. Enal 5 was converted to the diene 6 by the addition of vinyl magnesium bromide. Ring closing metathesis of the diene 6 using Grubbs’ second generation catalyst installed the core cyclohexenyl unit. Through several iterative and selective manipulations of various hydroxyl groups, uvacalol A, uvacalol B, uvacalol C, uvacalol E and uvacalol G were synthesized. A comparison of the (1)H NMR and (13)C NMR data of these synthesized molecules with the reported data, revealed that the reported structures of uvacalols A–C are correct and those of uvacalols E and G are wrong.
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Affiliation(s)
- Adiyala Vidyasagar
- School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram 695016, India.
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Abstract
This chapter focuses on recent developments in metal-free and metal-catalyzed arylations with diaryliodonium salts (diaryl-λ3-iodanes). Synthetic routes to diaryliodonium salts are briefly described, and chemoselectivity trends with unsymmetric iodonium salts are discussed.
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Affiliation(s)
- Berit Olofsson
- Arrhenius Laboratory, Department of Organic Chemistry, Stockholm University, 106 91, Stockholm, Sweden.
- Stellenbosch Institute for Advanced Study (STIAS), Wallenberg Research Centre at Stellenbosch University, Marais Street, Stellenbosch, 7600, South Africa.
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Pathipati SR, Singh V, Eriksson L, Selander N. Lewis Acid Catalyzed Annulation of Nitrones with Oxiranes, Aziridines, and Thiiranes. Org Lett 2015; 17:4506-9. [DOI: 10.1021/acs.orglett.5b02195] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Stalin R. Pathipati
- Department of Organic Chemistry and ‡Department of Materials and Environmental
Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Vipender Singh
- Department of Organic Chemistry and ‡Department of Materials and Environmental
Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Lars Eriksson
- Department of Organic Chemistry and ‡Department of Materials and Environmental
Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Nicklas Selander
- Department of Organic Chemistry and ‡Department of Materials and Environmental
Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
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29
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Song GT, Li SQ, Yang ZW, Yuan JH, Wang MS, Zhu J, Chen ZZ, Xu ZG. Microwave-assisted synthesis of fused piperazine-benzimidazoles via a facile, one-pot procedure. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.06.035] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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30
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One-Pot α-Amidosulfone-Mediated Variation of the Pictet-Spengler Tetrahydroisoquinoline Synthesis, Suitable for Amide-Type Substrates. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402487] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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31
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Takahashi S, Yoshida A, Uesugi S, Hongo Y, Kimura KI, Matsuoka K, Koshino H. Structural revision of kynapcin-12 by total synthesis, and inhibitory activities against prolyl oligopeptidase and cancer cells. Bioorg Med Chem Lett 2014; 24:3373-6. [PMID: 24948566 DOI: 10.1016/j.bmcl.2014.05.091] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 05/23/2014] [Accepted: 05/26/2014] [Indexed: 11/17/2022]
Abstract
Kynapcin-12 is a prolyl oligopeptidase (POP) inhibitor isolated from Polyozellus multiplex, and its structure was assigned as 1 having a p-hydroquinone moiety by spectroscopic analyses and chemical means. This Letter describes the total syntheses of the proposed structure 1 for kynapcin-12 and 2',3'-diacetoxy-1,5',6',4″-tetrahydroxy-p-terphenyl 2 isolated from Boletopsis grisea, revising the structure of kynapcin-12 to the latter. These syntheses involved double Suzuki-Miyaura coupling, CAN oxidation, and LTA oxidation as key steps. The inhibitory activities of synthetic compounds against POP and cancer cells were also evaluated.
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Affiliation(s)
| | - Ayaka Yoshida
- RIKEN, Wako-shi, Saitama 351-0198, Japan; Division of Material Science, Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan
| | - Shota Uesugi
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan
| | | | - Ken-ichi Kimura
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Koji Matsuoka
- Division of Material Science, Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan
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Esguerra KVN, Fall Y, Lumb JP. A biomimetic catalytic aerobic functionalization of phenols. Angew Chem Int Ed Engl 2014; 53:5877-81. [PMID: 24753261 DOI: 10.1002/anie.201311103] [Citation(s) in RCA: 83] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2013] [Indexed: 12/12/2022]
Abstract
The importance of aromatic C-O, C-N, and C-S bonds necessitates increasingly efficient strategies for their formation. Herein, we report a biomimetic approach that converts phenolic C-H bonds into C-O, C-N, and C-S bonds at the sole expense of reducing dioxygen (O2) to water (H2O). Our method hinges on a regio- and chemoselective copper-catalyzed aerobic oxygenation to provide ortho-quinones. ortho-Quinones are versatile intermediates, whose direct catalytic aerobic synthesis from phenols enables a mild and efficient means of synthesizing polyfunctional aromatic rings.
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Affiliation(s)
- Kenneth Virgel N Esguerra
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC, H3A 0B8 (Canada)
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33
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Esguerra KVN, Fall Y, Lumb JP. A Biomimetic Catalytic Aerobic Functionalization of Phenols. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201311103] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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34
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Deb A, Agasti S, Saboo T, Maiti D. Generation of Arylated Quinones by Iron-Catalyzed Oxidative Arylation of Phenols: Formal Synthesis of Phellodonin, Sarcodonin ε, Leucomelone and Betulinan A. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201301084] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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35
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Poudel TN, Lee YR. An advanced and novel one-pot synthetic method for diverse benzo[c]chromen-6-ones by transition-metal free mild base-promoted domino reactions of substituted 2-hydroxychalcones with β-ketoesters and its application to polysubstituted terphenyls. Org Biomol Chem 2014; 12:919-30. [DOI: 10.1039/c3ob41800f] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Novel one-pot syntheses of a variety of benzo[c]chromen-6-one derivatives were accomplished by Cs2CO3-promoted reactions of 2-hydroxychalcones.
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Affiliation(s)
- Tej Narayan Poudel
- School of Chemical Engineering
- Yeungnam University
- Gyeongsan 712-749, Republic of Korea
| | - Yong Rok Lee
- School of Chemical Engineering
- Yeungnam University
- Gyeongsan 712-749, Republic of Korea
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36
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Mondal S, Sureshan KM. Total syntheses and structural validation of lincitol A, lincitol B, uvacalol I, uvacalol J, and uvacalol K. Org Biomol Chem 2014; 12:7279-89. [DOI: 10.1039/c4ob01329h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
First total syntheses of lincitol A, lincitol B, uvacalol I, uvacalol J and uvacalol K were achieved in racemic form, validating their structure from a common intermediate, which was synthesized in six steps from low-cost and extensively available myo-inositol.
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Affiliation(s)
- Soumik Mondal
- School of Chemistry
- Indian Institute of Science Education and Research
- Thiruvananthapuram 695016, India
| | - Kana M. Sureshan
- School of Chemistry
- Indian Institute of Science Education and Research
- Thiruvananthapuram 695016, India
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37
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Pilkington LI, Barker D. Total Synthesis of (-)-Isoamericanin A and (+)-Isoamericanol A. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301363] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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38
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Lv T, Wang Z, You J, Lan J, Gao G. Copper-Catalyzed Direct Aryl Quaternization of N-Substituted Imidazoles to Form Imidazolium Salts. J Org Chem 2013; 78:5723-30. [DOI: 10.1021/jo400527r] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Taiyong Lv
- Key Laboratory of Green Chemistry and Technology of
Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064 P. R.
China
| | - Zhi Wang
- Key Laboratory of Green Chemistry and Technology of
Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064 P. R.
China
| | - Jingsong You
- Key Laboratory of Green Chemistry and Technology of
Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064 P. R.
China
| | - Jingbo Lan
- Key Laboratory of Green Chemistry and Technology of
Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064 P. R.
China
| | - Ge Gao
- Key Laboratory of Green Chemistry and Technology of
Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064 P. R.
China
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Masubuti H, Endo Y, Araya H, Uekusa H, Fujimoto Y. Establishment of Benzodioxazine Core Structure for Sarcodonin Class of Natural Products by X-ray Analysis. Org Lett 2013; 15:2076-9. [DOI: 10.1021/ol400595k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hironori Masubuti
- Department of Chemistry and Materials Science, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan, and School of Agriculture, Meiji University, Higashimita, Tama-ku, Kawasaki, Kanagawa 214-8571, Japan
| | - Yasuhisa Endo
- Department of Chemistry and Materials Science, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan, and School of Agriculture, Meiji University, Higashimita, Tama-ku, Kawasaki, Kanagawa 214-8571, Japan
| | - Hiroshi Araya
- Department of Chemistry and Materials Science, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan, and School of Agriculture, Meiji University, Higashimita, Tama-ku, Kawasaki, Kanagawa 214-8571, Japan
| | - Hidehiro Uekusa
- Department of Chemistry and Materials Science, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan, and School of Agriculture, Meiji University, Higashimita, Tama-ku, Kawasaki, Kanagawa 214-8571, Japan
| | - Yoshinori Fujimoto
- Department of Chemistry and Materials Science, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan, and School of Agriculture, Meiji University, Higashimita, Tama-ku, Kawasaki, Kanagawa 214-8571, Japan
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Usui I, Lin DW, Masuda T, Baran PS. Convergent synthesis and structural confirmation of phellodonin and sarcodonin ε. Org Lett 2013; 15:2080-3. [PMID: 23577748 DOI: 10.1021/ol400709f] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The first synthesis of members of the sarcodonin family, phellodonin and sarcodonin ε, is reported herein. This verifies that the unprecedented and seemingly unstable N,N-dioxide-containing benzodioxazine framework can be constructed in the laboratory and lends further support to the proposed structures. The key step in the synthesis involves a biomimetic hetero-Diels-Alder reaction between a pyrazine N-oxide and an ortho-quinone.
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Affiliation(s)
- Ippei Usui
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
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41
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Endo Y, Minowa A, Kanamori R, Araya H. A rare α-pyrone from bitter tooth mushroom, Sarcodon scabrosus (Fr.) Karst. BIOCHEM SYST ECOL 2012. [DOI: 10.1016/j.bse.2012.06.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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42
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Dohi T, Kamitanaka T, Watanabe S, Hu Y, Washimi N, Kita Y. Efficient Synthesis of Oxygenated Terphenyls and Other Oligomers: Sequential Arylation Reactions Through Phenol Oxidation-Rearomatization. Chemistry 2012; 18:13614-8. [DOI: 10.1002/chem.201202086] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Indexed: 11/08/2022]
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43
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Badrinarayanan S, Sperry J. Pyrazine alkaloids via dimerization of amino acid-derived α-amino aldehydes: biomimetic synthesis of 2,5-diisopropylpyrazine, 2,5-bis(3-indolylmethyl)pyrazine and actinopolymorphol C. Org Biomol Chem 2012; 10:2126-32. [DOI: 10.1039/c2ob06935k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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44
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González JF, Ortín I, de la Cuesta E, Menéndez JC. Privileged scaffolds in synthesis: 2,5-piperazinediones as templates for the preparation of structurally diverse heterocycles. Chem Soc Rev 2012; 41:6902-15. [DOI: 10.1039/c2cs35158g] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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