1
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Castillo-Contreras EB, Lauzon JM, James BR. Cleavage of lignin model compounds using ruthenium/KOH or KOH-only systems. Catal Today 2022. [DOI: 10.1016/j.cattod.2022.05.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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2
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Prasad SS, Joshi DR, Lee JH, Kim I. One-pot access to 2-amino-3-arylbenzofurans: direct entry to polyheterocyclic chemical space. Org Biomol Chem 2020; 18:8119-8140. [PMID: 33016294 DOI: 10.1039/d0ob01715a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
As a means to make new benzofuran-embedded polycyclic structures, we established two efficient one-pot sequential coupling routes to 2-amino-3-arylbenzofurans and 2-amino-3-arylnaphtho[2,1-b]furans. Further ring formation (six- and seven-membered rings) with the resulting amine moiety at the C2 position of benzofurans was realized, leading to further expansion of benzofuran-based chemical space.
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Affiliation(s)
- Sure Siva Prasad
- College of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon, 21983, Republic of Korea.
| | - Dirgha Raj Joshi
- College of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon, 21983, Republic of Korea.
| | - Jeong Hwa Lee
- College of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon, 21983, Republic of Korea.
| | - Ikyon Kim
- College of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon, 21983, Republic of Korea.
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3
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Kim J, Cha H, Park M, Singh DK, Bae GH, Kim SH, Kim I. Expanding the chemical space: Discovery of new anticancer
3‐arylbenzofuran
derivatives. J Heterocycl Chem 2020. [DOI: 10.1002/jhet.4043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Jinhwang Kim
- College of Pharmacy and Yonsei Institute of Pharmaceutical SciencesYonsei University Incheon South Korea
| | - Hyeon‐Min Cha
- Graduate School of New Drug Discovery and DevelopmentChungnam National University Daejeon South Korea
| | - Mikyung Park
- Innovative Target Research Center, Therapeutics & Biotechnology DivisionKorea Research Institute of Chemical Technology Daejeon South Korea
| | - Dileep K. Singh
- College of Pharmacy and Yonsei Institute of Pharmaceutical SciencesYonsei University Incheon South Korea
| | - Gi H. Bae
- College of Pharmacy and Yonsei Institute of Pharmaceutical SciencesYonsei University Incheon South Korea
| | - Seong H. Kim
- Graduate School of New Drug Discovery and DevelopmentChungnam National University Daejeon South Korea
- Innovative Target Research Center, Therapeutics & Biotechnology DivisionKorea Research Institute of Chemical Technology Daejeon South Korea
| | - Ikyon Kim
- College of Pharmacy and Yonsei Institute of Pharmaceutical SciencesYonsei University Incheon South Korea
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4
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Chiummiento L, D’Orsi R, Funicello M, Lupattelli P. Last Decade of Unconventional Methodologies for the Synthesis of Substituted Benzofurans. Molecules 2020; 25:E2327. [PMID: 32429435 PMCID: PMC7288127 DOI: 10.3390/molecules25102327] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 05/13/2020] [Accepted: 05/13/2020] [Indexed: 12/13/2022] Open
Abstract
This review describes the progress of the last decade on the synthesis of substituted benzofurans, which are useful scaffolds for the synthesis of numerous natural products and pharmaceuticals. In particular, new intramolecular and intermolecular C-C and/or C-O bond-forming processes, with transition-metal catalysis or metal-free are summarized. (1) Introduction. (2) Ring generation via intramolecular cyclization. (2.1) C7a-O bond formation: (route a). (2.2) O-C2 bond formation: (route b). (2.3) C2-C3 bond formation: (route c). (2.4) C3-C3a bond formation: (route d). (3) Ring generation via intermolecular cyclization. (3.1) C7a-O and C3-C3a bond formation (route a + d). (3.2) O-C2 and C2-C3 bond formation: (route b + c). (3.3) O-C2 and C3-C3a bond formation: (route b + d). (4) Benzannulation. (5) Conclusion.
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Affiliation(s)
- Lucia Chiummiento
- Department of Science, Via dell’Ateneo Lucano, 10, 85100 Potenza, Italy; (R.D.); (M.F.); (P.L.)
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5
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Abstract
:
The benzofuranyl motif present in compounds exhibits various medicinal properties and
non-drug applications. These derivatives are naturally occurring compounds or synthetic materials,
which cover a broad spectrum of pharmacological activities like anti-inflammatory, anti-diabetic, anti-
depressant, anti-HIV, anti-microbial, anti-proliferative, anti-convulsant, cytotoxic, analgesic, etc.
Few of the commercially interesting compounds from this class are, ailanthoidol (anti-inflammatory),
amiodarone, dronedarone, celivarone (anti-arrhythmic), bufuralol (muscular airways relaxant), morphine,
5-(2-aminopropyl)benzofuran; 5-APB, 6-(2-aminopropyl)benzofuran; 6-APB (CNS), rifampicin
(antibiotic), etc., whereas, some of the non-drug applications are in perfumery industry (bergapten)
and as tannin activators in sunscreen preparations (psoralen, 8-methoxypsoralen, and angelicin).
Considering these interesting biological activities and commercial utilities, a review on the synthetic
aspects of this privileged scaffold was attempted. For the benefit of natural product-based drug discovery,
available sources of these derivatives, extraction process and reported biological activities
have also been outlined in this review.
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Affiliation(s)
- Andiappan Lavanya
- Department of Training and Development, Orchid Pharma Ltd., 138-149, SIDCO Industrial Estate, Alathur, Chennai- 603 110, Tamil Nadu, India
| | - Kilambi Narasimhan
- Department of Training and Development, Orchid Pharma Ltd., 138-149, SIDCO Industrial Estate, Alathur, Chennai- 603 110, Tamil Nadu, India
| | - Vediappen Padmini
- Department of Organic Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai 625021, Tamil Nadu, India
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Reddy RJ, Kumar JJ, Kumari AH, Krishna GR. Pd‐Catalyzed Annulation of β‐Iodovinyl Sulfones with 2‐Halophenols: A General Route for the Synthesis of 3‐Sulfonyl Benzofuran Derivatives. Adv Synth Catal 2020. [DOI: 10.1002/adsc.201901550] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Raju Jannapu Reddy
- Department of Chemistry, University College of ScienceOsmania University Hyderabad 500 007 India
| | - Jangam Jagadesh Kumar
- Department of Chemistry, University College of ScienceOsmania University Hyderabad 500 007 India
| | - Arram Haritha Kumari
- Department of Chemistry, University College of ScienceOsmania University Hyderabad 500 007 India
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7
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Ma Z, Zhou M, Ma L, Zhang M. Synthesis of benzofurans from the cyclodehydration of α-phenoxy ketones mediated by Eaton’s reagent. JOURNAL OF CHEMICAL RESEARCH 2020. [DOI: 10.1177/1747519820907244] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Cyclodehydration of α-phenoxy ketones promoted by Eaton’s reagent (phosphorus pentoxide–methanesulfonic acid) is used to prepare 3-substituted or 2,3-disubstituted benzofurans with moderate to excellent yields under mild conditions. The method provides a facile access to benzofurans from readily available starting materials such as phenols and α-bromo ketones. The reaction is highly efficient, which is attributed to the good reactivity and fluidity of Eaton’s reagent. The reaction can be applied to prepare naphthofurans, furanocoumarins, benzothiophenes, and benzopyrans.
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Affiliation(s)
- Zhanwei Ma
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, P.R. China
| | - Min Zhou
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, P.R. China
| | - Lin Ma
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, P.R. China
| | - Min Zhang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, P.R. China
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8
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Chen LL, Zhang JW, Chen P, Zhang S, Yang WW, Fu JY, Zhu JY, Wang YB. Base-Controlled Divergent Synthesis of 5-Cyanobenzoxepines and Benzofuro[2,3-b]pyridines from 2-Bromophenylacetonitriles and Ynones. Org Lett 2019; 21:5457-5461. [DOI: 10.1021/acs.orglett.9b01700] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Lu-Lu Chen
- Institute of Functional Organic Molecular Engineering, Henan Engineering Laboratory of Flame-Retardant and Functional Materials, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Jing-Wen Zhang
- Institute of Functional Organic Molecular Engineering, Henan Engineering Laboratory of Flame-Retardant and Functional Materials, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Pei Chen
- Institute of Functional Organic Molecular Engineering, Henan Engineering Laboratory of Flame-Retardant and Functional Materials, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Shuai Zhang
- Institute of Functional Organic Molecular Engineering, Henan Engineering Laboratory of Flame-Retardant and Functional Materials, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Wan-Wan Yang
- Institute of Functional Organic Molecular Engineering, Henan Engineering Laboratory of Flame-Retardant and Functional Materials, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Ji-Ya Fu
- Institute of Functional Organic Molecular Engineering, Henan Engineering Laboratory of Flame-Retardant and Functional Materials, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Jun-Yan Zhu
- Institute of Functional Organic Molecular Engineering, Henan Engineering Laboratory of Flame-Retardant and Functional Materials, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
| | - Yan-Bo Wang
- Institute of Functional Organic Molecular Engineering, Henan Engineering Laboratory of Flame-Retardant and Functional Materials, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China
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9
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Singh DK, Jang K, Kim J, Lee J, Kim I. Intramolecular Electrophilic Cyclization Approach to 6-Substituted Naphtho[2,1- b]benzofurans: Novel Dual-State Emissive Fluorophores with Blue Emission. ACS COMBINATORIAL SCIENCE 2019; 21:408-416. [PMID: 30925043 DOI: 10.1021/acscombsci.9b00006] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A regiospecific synthesis of naphtho[2,1- b]benzofurans with a substituent at the C6 position was achieved via intramolecular 6-endo-dig electrophilic cyclization under acidic conditions to construct the central aromatic C ring. Screening of the synthesized compounds using a high-content imaging system enabled us to discover novel dual state emissive compounds 2{ 1,6}, 2{ 1,8}, and 2{ 4,3}, which are highly emissive with blue emission in their solid states as well as in solution states in most solvents. In addition, the compounds 2{ 4,3}, 2{ 4,12}, and 2{ 5,13} were found to be the most cell permeable in HeLa cells for live cell imaging with negligible phototoxicity.
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Affiliation(s)
- Dileep Kumar Singh
- College of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon 21983, Republic of Korea
| | - Kyungkuk Jang
- College of Pharmacy, Research Institute of Pharmaceutical Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Jinhwang Kim
- College of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon 21983, Republic of Korea
| | - Jeeyeon Lee
- College of Pharmacy, Research Institute of Pharmaceutical Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Ikyon Kim
- College of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon 21983, Republic of Korea
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10
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Harish B, Subbireddy M, Obulesu O, Suresh S. One-Pot Allylation-Intramolecular Vinylogous Michael Addition-Isomerization Cascade of o-Hydroxycinnamates and Congeners: Synthesis of Substituted Benzofuran Derivatives. Org Lett 2019; 21:1823-1827. [PMID: 30835484 DOI: 10.1021/acs.orglett.9b00414] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A unique intramolecular vinylogous Michael addition leading to the synthesis of heterocycles has been disclosed. Base-promoted one-pot sequential O-allylation of o-hydroxy-cinnamates or -cinnamonitrile or -chalcones with γ-bromocrotonates followed by an intramolecular conjugate addition of vinylogous Michael donors resulted in the formation of highly substituted benzofuran derivatives in good to excellent yields. The intramolecular event followed by two [1,3]-H shifts leading to aromatization appears to be the key to the success of this unprecedented transformation.
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Affiliation(s)
- Battu Harish
- Organic Synthesis and Process Chemistry , CSIR-Indian Institute of Chemical Technology (CSIR-IICT) , Hyderabad 500 007 , India.,Academy of Scientific and Innovative Research (AcSIR) , Ghaziabad 201002 , India
| | - Manyam Subbireddy
- Organic Synthesis and Process Chemistry , CSIR-Indian Institute of Chemical Technology (CSIR-IICT) , Hyderabad 500 007 , India
| | - Owk Obulesu
- Organic Synthesis and Process Chemistry , CSIR-Indian Institute of Chemical Technology (CSIR-IICT) , Hyderabad 500 007 , India.,Academy of Scientific and Innovative Research (AcSIR) , Ghaziabad 201002 , India
| | - Surisetti Suresh
- Organic Synthesis and Process Chemistry , CSIR-Indian Institute of Chemical Technology (CSIR-IICT) , Hyderabad 500 007 , India.,Academy of Scientific and Innovative Research (AcSIR) , Ghaziabad 201002 , India
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11
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Sha Q, Liu H, Li Y. Trifluoroacetic Acid Catalyzed Cascade Reactions of 2,3‐Diketoesters with Cyclohexane‐1,3‐diones: Strategy Towards 4‐Hydroxybenzofuran Derivatives. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900056] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Qiang Sha
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry, College of SciencesNanjing Agricultural University Nanjing 210095 People's Republic of China
| | - Haixuan Liu
- Sanhome R&D CentreNanjing Sanhome Pharmaceutical Co., Ltd. Nanjing 211135 People's Republic of China
| | - Yuan Li
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry, College of SciencesNanjing Agricultural University Nanjing 210095 People's Republic of China
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12
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13
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14
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Yamaguchi M, Ozawa H, Katsumata H, Akiyama T, Manabe K. One-pot synthesis of 2,3-disubstituted benzofurans from 2-chlorophenols using palladium–dihydroxyterphenylphosphine catalyst. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.07.019] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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15
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Oxidation of Benzylic Alcohols and Lignin Model Compounds with Layered Double Hydroxide Catalysts. INORGANICS 2018. [DOI: 10.3390/inorganics6030075] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Alcohol oxidation to carbonyl compounds is one of the most commonly used reactions in synthetic chemistry. Herein, we report the use of base metal layered double hydroxide (LDH) catalysts for the oxidation of benzylic alcohols in polar solvents. These catalysts are ideal reagents for alcohol oxidations due to their ease of synthesis, tunability, and ease of separation from the reaction medium. LDHs synthesized in this study were fully characterized by means of X-ray diffraction, NH3-temperature programmed desorption (TPD), pulsed CO2 chemisorption, N2 physisorption, electron microscopy, and elemental analysis. LDHs were found to effectively oxidize benzylic alcohols to their corresponding carbonyl compounds in diphenyl ether, using O2 as the terminal oxidant. LDH catalysts were also applied to the oxidation of lignin β-O-4 model compounds. Typically, for all catalysts, only trace amounts of the ketone formed from benzylic alcohol oxidation were observed, the main products comprising benzoic acids and phenols arising from β-aryl ether cleavage. This observation is consistent with the higher reactivity of the ketones, resulting from weakening of the Cβ–O4 bond that was shown to be aerobically cleaved at 180 °C in the absence of a catalyst.
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16
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Singh G, Goswami P, Sharma S, Anand RV. A One-Pot Approach to 2,3-Diarylbenzo[b]furans through N-Heterocyclic Carbene-Catalyzed 1,6-Conjugate Addition Followed by Acid Mediated Dehydrative Annulation. J Org Chem 2018; 83:10546-10554. [DOI: 10.1021/acs.joc.8b01358] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Gurdeep Singh
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, S. A. S. Nagar, Manauli (PO), Punjab 140306, India
| | - Prithwish Goswami
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, S. A. S. Nagar, Manauli (PO), Punjab 140306, India
| | - Sonam Sharma
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, S. A. S. Nagar, Manauli (PO), Punjab 140306, India
| | - Ramasamy Vijaya Anand
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, S. A. S. Nagar, Manauli (PO), Punjab 140306, India
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17
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Yamane S, Hinoue T, Usuki Y, Itazaki M, Nakazawa H, Hayashi Y, Kawauchi S, Miura M, Satoh T. Iridium-Catalyzed Aerobic Coupling of Salicylaldehydes with Alkynes: A Remarkable Switch of Oxacyclic Product. Chemistry 2018; 24:7852-7855. [PMID: 29573094 DOI: 10.1002/chem.201801245] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Indexed: 12/12/2022]
Abstract
The iridium(III)/copper(II)-catalyzed dehydrogenative coupling of salicylaldehydes with internal alkynes proceeds efficiently under atmospheric oxygen through aldehyde C-H bond cleavage and decarbonylation. A variety of benzofuran derivatives can be synthesized by the environmentally benign procedure. DFT calculations suggest that this unique transformation involves the facile deinsertion of CO in the key metallacycle intermediate, which is in marked contrast to the corresponding rhodium(III) catalysis that leads to CO-retentive chromone derivatives.
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Affiliation(s)
- Shintaro Yamane
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka, 558-8585, Japan
| | - Tomoaki Hinoue
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Yoshinosuke Usuki
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka, 558-8585, Japan
| | - Masumi Itazaki
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka, 558-8585, Japan
| | - Hiroshi Nakazawa
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka, 558-8585, Japan
| | - Yoshihiro Hayashi
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 (E4-6), Ookayama, Meguro-ku, Tokyo, 152-8552, Japan
| | - Susumu Kawauchi
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 (E4-6), Ookayama, Meguro-ku, Tokyo, 152-8552, Japan
| | - Masahiro Miura
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Tetsuya Satoh
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka, 558-8585, Japan
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18
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Liu JT, Do TJ, Simmons CJ, Lynch JC, Gu W, Ma ZX, Xu W, Tang W. Total synthesis of diptoindonesin G and its analogues as selective modulators of estrogen receptors. Org Biomol Chem 2018; 14:8927-8930. [PMID: 27714255 DOI: 10.1039/c6ob01657j] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We have developed a versatile synthetic strategy for the synthesis of the natural product diptoindonesin G and its analogues as selective modulators of estrogen receptors. The strategy involves a regioselective dehydrative cyclization of arylacetals, a regioselective bromination of benzofurans, a sequential cross-coupling of bromo-benzofurans with aryl boronic acids, and a BBr3-mediated tandem cyclization and demethylation. Preliminary biological studies uncovered the critical and dispensable phenolic hydroxyl groups in the natural product and also revealed unexpected selectivity for isoforms of estrogen receptor.
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Affiliation(s)
- Ji-Tian Liu
- School of Pharmacy, University of Wisconsin-Madison, Madison, WI 53705, USA and School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 300072, P. R. China
| | - Truman J Do
- McArdle Laboratory for Cancer Research, Wisconsin Institute for Medical Research, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Christopher J Simmons
- School of Pharmacy, University of Wisconsin-Madison, Madison, WI 53705, USA and Department of Chemistry, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - John C Lynch
- School of Pharmacy, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Wen Gu
- School of Pharmacy, University of Wisconsin-Madison, Madison, WI 53705, USA and Jiangsu Key Lab of Biomass-based Green Fuels and Chemicals, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, PR China
| | - Zhi-Xiong Ma
- Medicinal Chemistry Center, School of Pharmacy, University of Wisconsin-Madison, Madison, WI 53706, USA.
| | - Wei Xu
- McArdle Laboratory for Cancer Research, Wisconsin Institute for Medical Research, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Weiping Tang
- School of Pharmacy, University of Wisconsin-Madison, Madison, WI 53705, USA and Department of Chemistry, University of Wisconsin-Madison, Madison, WI 53706, USA and Medicinal Chemistry Center, School of Pharmacy, University of Wisconsin-Madison, Madison, WI 53706, USA.
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19
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Abarghooei MA, Mohebat R, Karimi-Jaberi Z, Mosslemin MH. Synthesis of 3-Aryl-Benzo[b]Furans and 3-Aryl-Naphtho[b]Furans Using N-Propyl-4-Aza-1-Azoniabicyclo[2.2.2]Octane Chloride Immobilised on SiO2 as an Efficient and Reusable Catalyst. JOURNAL OF CHEMICAL RESEARCH 2018. [DOI: 10.3184/174751918x15178270188063] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A new and convenient method is describe d for the synthesis of 3-aryl-benzo[ b]furans and 3-aryl-naphtho[ b]furans by the reaction of various α-bromoketones with phenols and 2-naphthols in the presence of n-propyl-4-aza-1-azoniabicyclo[2.2.2]octane chloride immobilised on SiO2. All products were obtained in high yields and short reaction times using solvent-free conditions and a reusable catalyst.
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Affiliation(s)
| | - Razieh Mohebat
- Department of Chemistry, Yazd Branch, Islamic Azad University, Yazd, Iran
| | - Zahed Karimi-Jaberi
- Department of Chemistry, Firoozabad Branch, Islamic Azad University, Firoozabad, Fars, Iran
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20
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Liu X, Zhang H, Wu C, Liu Z, Chen Y, Yu B, Liu Z. Copper-catalyzed synthesis of benzanilides from lignin model substrates 2-phenoxyacetophenones under an air atmosphere. NEW J CHEM 2018. [DOI: 10.1039/c7nj02589k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A novel approach for the synthesis of benzanilides is presented via the Cu-catalyzed reaction of 2-phenoxyacetophenones with anilines under an air atmosphere, and a series of benzanilides can be obtained in high yields.
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Affiliation(s)
- Xinwei Liu
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid
- Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Hongye Zhang
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid
- Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Cailing Wu
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid
- Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Zhenghui Liu
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid
- Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Yu Chen
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid
- Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Bo Yu
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid
- Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Zhimin Liu
- Beijing National Laboratory for Molecular Sciences
- Key Laboratory of Colloid
- Interface and Thermodynamics
- Institute of Chemistry
- Chinese Academy of Sciences
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21
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Santhosh Kumar P, Ravikumar B, Chinna Ashalu K, Rajender Reddy K. TBAI/TBHP mediated oxidative cross coupling of ketones with phenols and carboxylic acids: Direct access to benzofurans. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2017.11.043] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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22
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Copper-Iodide- and Diorganyl-Diselenide-Promoted Cyclization of 2-Alkynylphenols: Alternative Approach to 3-Organoselanylbenzo[b
]furans. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701205] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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23
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Polyaromatic heterocycles through intramolecular alkyne carbonyl metathesis: 5-Acylnaphtho[2,1- b ]benzofurans. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.02.036] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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24
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He GX, Yuan JM, Zhu HM, Wei K, Wang LY, Kong SL, Mo DL, Pan CX, Su GF. Synthesis and antitumor evaluation of 2,3-diarylbenzofuran derivatives on HeLa cells. Bioorg Med Chem Lett 2017; 27:1660-1664. [DOI: 10.1016/j.bmcl.2017.03.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 02/19/2017] [Accepted: 03/06/2017] [Indexed: 01/03/2023]
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25
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Jung Y, Singh DK, Kim I. Symmetry-based approach to oligostilbenoids: Rapid entry to viniferifuran, shoreaphenol, malibatol A, and diptoindonesin G. Beilstein J Org Chem 2017; 12:2689-2693. [PMID: 28144340 PMCID: PMC5238531 DOI: 10.3762/bjoc.12.266] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 11/25/2016] [Indexed: 12/30/2022] Open
Abstract
The recognition of the local symmetric image within benzofuran-based natural oligostilbenoids guided us to design a modular synthetic approach to these molecules by utilizing a three-step sequence consisting of Sonogashira coupling, iodocyclization, and Suzuki coupling. During our synthesis, the relative reactivities of ester, aldehyde, and alkoxy groups on the same aryl ring toward the neighboring alkyne in the iodine-mediated cyclization reactions were explored. Starting from the symmetrical 3,5-dimethoxybenzyl alcohol, this route allowed rapid access to 2,3-diarylbenzofuran, a key intermediate to several oligostilbenoid natural products, in good overall yields.
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Affiliation(s)
- Youngeun Jung
- College of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon 21983, Republic of Korea
| | - Dileep Kumar Singh
- College of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon 21983, Republic of Korea
| | - Ikyon Kim
- College of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon 21983, Republic of Korea
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26
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Heravi M, Zadsirjan V, Hamidi H, Tabar Amiri PH. Total synthesis of natural products containing benzofuran rings. RSC Adv 2017. [DOI: 10.1039/c7ra03551a] [Citation(s) in RCA: 101] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
In this review, various approaches for the construction of benzofurans as an important moiety in different natural products during the total synthesis of the natural of products are underscored.
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Affiliation(s)
- Majid M. Heravi
- Department of Chemistry
- School of Sciences
- Alzahra University
- Tehran
- Iran
| | - Vahideh Zadsirjan
- Department of Chemistry
- School of Sciences
- Alzahra University
- Tehran
- Iran
| | - Hoda Hamidi
- Department of Chemistry
- School of Sciences
- Alzahra University
- Tehran
- Iran
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27
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Jennings JA, Parkin S, Munson E, Delaney SP, Calahan JL, Isaacs M, Hong K, Crocker M. Regioselective Baeyer–Villiger oxidation of lignin model compounds with tin beta zeolite catalyst and hydrogen peroxide. RSC Adv 2017. [DOI: 10.1039/c7ra03830e] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
One approach to lignin deconstruction involves oxidation of benzylic alcohol groups, followed by Baeyer–Villiger oxidation (BVO) and ester hydrolysis. In this study β-O-4 and β-1 lignin models were oxidized using a heterogeneous BVO system.
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Affiliation(s)
- John A. Jennings
- Department of Chemistry
- University of Kentucky
- Lexington
- USA
- University of Kentucky Center for Applied Energy Research
| | - Sean Parkin
- Department of Chemistry
- University of Kentucky
- Lexington
- USA
| | - Eric Munson
- Department of Pharmaceutical Sciences
- University of Kentucky
- Lexington
- USA
| | - Sean P. Delaney
- Department of Pharmaceutical Sciences
- University of Kentucky
- Lexington
- USA
| | - Julie L. Calahan
- Department of Pharmaceutical Sciences
- University of Kentucky
- Lexington
- USA
| | - Mark Isaacs
- European Bioenergy Research Institute
- Aston University
- Birmingham
- UK
| | - Kunlun Hong
- Center for Nanophase Materials Sciences and Chemical Science Division
- Oak Ridge National Laboratory
- Oak Ridge
- USA
| | - Mark Crocker
- Department of Chemistry
- University of Kentucky
- Lexington
- USA
- University of Kentucky Center for Applied Energy Research
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28
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Nayak M, Jung Y, Kim I. Syntheses of pterocarpenes and coumestans via regioselective cyclodehydration. Org Biomol Chem 2016; 14:8074-87. [PMID: 27503798 DOI: 10.1039/c6ob01451h] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
A highly efficient synthetic route to pterocarpenes and coumestans is described. BCl3-mediated dehydrative cyclization of 1,3-diaryloxyacetones under mild conditions permitted regioselective ring closure to afford 3-((2-iodoaryloxy)methyl)benzofurans which were converted to the corresponding pterocarpenes by Pd-catalyzed intramolecular direct arylation. The subsequent benzylic oxidation led to coumestans. This sequence was applied to the formal syntheses of coumestrol and the proposed structure of plicadin as well as total syntheses of flemichapparins B and C.
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Affiliation(s)
- Maloy Nayak
- College of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon, 21983, Republic of Korea.
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29
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30
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Marelli E, Corpet M, Minenkov Y, Neyyappadath RM, Bismuto A, Buccolini G, Curcio M, Cavallo L, Nolan SP. Catalytic α-Arylation of Imines Leading to N-Unprotected Indoles and Azaindoles. ACS Catal 2016; 6:2930-2938. [PMID: 29291137 PMCID: PMC5745074 DOI: 10.1021/acscatal.6b00040] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Revised: 03/29/2016] [Indexed: 01/16/2023]
Abstract
![]()
A palladium N-heterocyclic
carbene catalyzed methodology for the
synthesis of substituted, N-unprotected indoles and azaindoles is
reported. The protocol permits access to various, highly substituted
members of these classes of compounds. Although two possible reaction
pathways (deprotonative and Heck-like) can be proposed, control experiments,
supported by computational studies, point toward a deprotonative mechanism
being operative.
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Affiliation(s)
- Enrico Marelli
- School
of Chemistry, EaStCHEM, University of St Andrews, North Haugh, St. Andrews KY16 9ST, U.K
| | - Martin Corpet
- School
of Chemistry, EaStCHEM, University of St Andrews, North Haugh, St. Andrews KY16 9ST, U.K
| | - Yury Minenkov
- Physical Sciences and Engineering Division, KAUST Catalysis
Center, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | | | - Alessandro Bismuto
- School
of Chemistry, EaStCHEM, University of St Andrews, North Haugh, St. Andrews KY16 9ST, U.K
| | - Giulia Buccolini
- School
of Chemistry, EaStCHEM, University of St Andrews, North Haugh, St. Andrews KY16 9ST, U.K
| | - Massimiliano Curcio
- School
of Chemistry, EaStCHEM, University of St Andrews, North Haugh, St. Andrews KY16 9ST, U.K
| | - Luigi Cavallo
- Physical Sciences and Engineering Division, KAUST Catalysis
Center, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Steven P. Nolan
- Chemistry
Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
- Department
of Inorganic and Physical Chemistry, Universiteit Gent, Krijgslaan 281-S3, 9000 Ghent, Belgium
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31
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Li J, Li C, Yang S, An Y, Wu W, Jiang H. Assembly of 3-Sulfenylbenzofurans and 3-Sulfenylindoles by Palladium-Catalyzed Cascade Annulation/Arylthiolation Reaction. J Org Chem 2016; 81:2875-87. [DOI: 10.1021/acs.joc.6b00162] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Jianxiao Li
- School
of Chemistry and Chemical Engineering and ‡State Key Laboratory of Luminescent
Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Chunsheng Li
- School
of Chemistry and Chemical Engineering and ‡State Key Laboratory of Luminescent
Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Shaorong Yang
- School
of Chemistry and Chemical Engineering and ‡State Key Laboratory of Luminescent
Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Yanni An
- School
of Chemistry and Chemical Engineering and ‡State Key Laboratory of Luminescent
Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Wanqing Wu
- School
of Chemistry and Chemical Engineering and ‡State Key Laboratory of Luminescent
Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Huanfeng Jiang
- School
of Chemistry and Chemical Engineering and ‡State Key Laboratory of Luminescent
Materials and Devices, South China University of Technology, Guangzhou 510640, China
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32
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Jia Y, Li T, Yu C, Jiang B, Yao C. A facile one-pot synthesis of 2,3-diarylated benzo[b]furans via relay NHC and palladium catalysis. Org Biomol Chem 2016; 14:1982-7. [PMID: 26754554 DOI: 10.1039/c5ob02336j] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient one-pot synthesis of 2,3-diarylated benzo[b]furans was realized through the relay catalysis of N-Heterocyclic Carbene (NHC) and palladium from substituted 2'-bromodiphenylbromomethanes and aryl aldehydes. The easy availability of the starting materials, good compatibility of catalysts, convergent assembly and concomitant modification of the target scaffold, and potential utilization value of the products make this strategy attractive in organic synthesis.
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Affiliation(s)
- Yanyan Jia
- School of Chemistry and Chemical Engineering, Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, Jiangsu 221116, P R China.
| | - Tuanjie Li
- School of Chemistry and Chemical Engineering, Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, Jiangsu 221116, P R China.
| | - Chenxia Yu
- School of Chemistry and Chemical Engineering, Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, Jiangsu 221116, P R China.
| | - Bo Jiang
- School of Chemistry and Chemical Engineering, Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, Jiangsu 221116, P R China.
| | - Changsheng Yao
- School of Chemistry and Chemical Engineering, Jiangsu Key Lab of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, Jiangsu 221116, P R China.
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33
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Jung Y, Kim I. Chemoselective reduction of quinols as an alternative to Sonogashira coupling: synthesis of polysubstituted benzofurans. Org Biomol Chem 2016; 14:10454-10472. [DOI: 10.1039/c6ob01941b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
An efficient synthetic approach to polysubstituted benzofurans is described, using 2-methoxyquinone as a benzofuran backbone.
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Affiliation(s)
- Youngeun Jung
- College of Pharmacy and Yonsei Institute of Pharmaceutical Sciences
- Yonsei University
- Incheon
- Republic of Korea
| | - Ikyon Kim
- College of Pharmacy and Yonsei Institute of Pharmaceutical Sciences
- Yonsei University
- Incheon
- Republic of Korea
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34
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Xie Y, Yu C, Que Y, Li T, Wang Y, Lu Y, Wang W, Shen S, Yao C. N-Heterocyclic carbene-triggered transition-metal-free synthesis of 2,3-disubstituted benzofuran derivatives. Org Biomol Chem 2016; 14:6463-9. [DOI: 10.1039/c6ob00363j] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
An NHC-triggered, transition-metal-free strategy for the efficient synthesis of 2,3-disubstituted benzofuran derivatives in moderate to excellent yields from aryl or alkyl aldehydes and o-quinone methides has been developed.
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Affiliation(s)
- Yuanwei Xie
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- School of Chemistry and Chemical Engineering
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Chenxia Yu
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- School of Chemistry and Chemical Engineering
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Yonglei Que
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- School of Chemistry and Chemical Engineering
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Tuanjie Li
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- School of Chemistry and Chemical Engineering
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Yuhong Wang
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- School of Chemistry and Chemical Engineering
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Yinan Lu
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- School of Chemistry and Chemical Engineering
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Wenjing Wang
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- School of Chemistry and Chemical Engineering
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Shide Shen
- Xuzhou Institute of Architectural Technology
- Xuzhou
- China
| | - Changsheng Yao
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials
- School of Chemistry and Chemical Engineering
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
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35
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Lindgren AEG, Öberg CT, Hillgren JM, Elofsson M. Total Synthesis of the Resveratrol Oligomers (±)-Ampelopsin B and (±)-ϵ-Viniferin. European J Org Chem 2015. [PMCID: PMC4737285 DOI: 10.1002/ejoc.201501486] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The total synthesis of the resveratrol dimers (±)‐ampelopsin B and (±)‐ϵ‐viniferin is reported. Highlights of the approach include the use of cyclopropylmethyl groups to protect aromatic alcohols. This group allows an acid promoted three‐step, one‐pot deprotection–epimerization–cyclization of an advanced intermediate to give (±)‐ampelopsin B. An important advantage with our strategy is the possibility of synthesizing analogs to these natural products to further study the chemistry and biology of resveratrol oligomers.
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Affiliation(s)
| | | | | | - Mikael Elofsson
- Department of Chemistry, Umeå University SE‐90187 Umeå, Sweden
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36
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Kang B, Lee MH, Kim M, Hwang J, Kim HB, Chi DY. Transition-Metal-Free Synthesis of 2-Substituted Methyl Benzo[b]furan-3-carboxylates. J Org Chem 2015; 80:8254-61. [DOI: 10.1021/acs.joc.5b01311] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Byungsoo Kang
- Department
of Chemistry, Sogang University, 35 Baekbeomro Mapogu, Seoul 121-742, Korea
| | - Min Hyung Lee
- Department
of Chemistry, Sogang University, 35 Baekbeomro Mapogu, Seoul 121-742, Korea
| | - Mijung Kim
- Department
of Chemistry, Sogang University, 35 Baekbeomro Mapogu, Seoul 121-742, Korea
| | - Jungwoon Hwang
- Department
of Chemistry, Sogang University, 35 Baekbeomro Mapogu, Seoul 121-742, Korea
| | - Hyeong Baik Kim
- Department
of Chemistry, Sogang University, 35 Baekbeomro Mapogu, Seoul 121-742, Korea
| | - Dae Yoon Chi
- Department
of Chemistry, Sogang University, 35 Baekbeomro Mapogu, Seoul 121-742, Korea
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37
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Li J, Zhu Z, Yang S, Zhang Z, Wu W, Jiang H. Palladium-Catalyzed Tandem Annulation: A Strategy To Construct 2,3-Difunctionalized Benzofuran Derivatives in Ionic Liquids. J Org Chem 2015; 80:3870-9. [DOI: 10.1021/acs.joc.5b00154] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jianxiao Li
- School
of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
| | - Zhongzhi Zhu
- School
of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
| | - Shaorong Yang
- School
of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
| | - Zhenming Zhang
- School
of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
| | - Wanqing Wu
- School
of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
| | - Huanfeng Jiang
- School
of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
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38
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Chang MY, Chen YC, Chan CK. Palladium-mediated α-arylation of β-ketosulfones: application to the synthesis of functionalized sulfonyl phenanthrenes. Tetrahedron 2015. [DOI: 10.1016/j.tet.2014.12.070] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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39
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Feng J, Lv MF, Lu GP, Cai C. Direct oxidative coupling of thiols and benzylic ethers via C(sp3)–H activation and C–O cleavage to lead thioesters. Org Biomol Chem 2015; 13:677-81. [DOI: 10.1039/c4ob02250e] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
An unprecedented protocol for the synthesis of thioesters via C–H thioesterification and C–O cleavage was developed. This CDC protocol was found convenient and easy-to-handle involving the use of DTBP as the only green oxidant.
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Affiliation(s)
- J. Feng
- Chemical Engineering College
- Nanjing University of Science & Technology
- Nanjing 210094
- P. R. China
| | - M.-F. Lv
- Chemical Engineering College
- Nanjing University of Science & Technology
- Nanjing 210094
- P. R. China
| | - G.-P. Lu
- Chemical Engineering College
- Nanjing University of Science & Technology
- Nanjing 210094
- P. R. China
| | - C. Cai
- Chemical Engineering College
- Nanjing University of Science & Technology
- Nanjing 210094
- P. R. China
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40
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Ma X, Wu F, Yi X, Wang H, Chen W. One-pot synthesis of 2,3-disubstituted dihydrobenzofurans and benzofurans via rhodium-catalyzed intramolecular C–H insertion reaction. Chem Commun (Camb) 2015; 51:6862-5. [PMID: 25791385 DOI: 10.1039/c5cc01271f] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Intramolecular sp3 C–H insertion of α-imino carbenoid. One pot synthesis of benzofuran derivatives.
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Affiliation(s)
- Xueji Ma
- Department of Chemistry
- Zhejiang University
- Hangzhou 310028
- China
| | - Feifei Wu
- Department of Chemistry
- Zhejiang University
- Hangzhou 310028
- China
| | - Xiaofei Yi
- Department of Chemistry
- Zhejiang University
- Hangzhou 310028
- China
| | - Hangxiang Wang
- The First Affiliated Hospital
- School of Medicine
- Zhejiang University
- Hangzhou
- China
| | - Wanzhi Chen
- Department of Chemistry
- Zhejiang University
- Hangzhou 310028
- China
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41
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Patil ND, Yao SG, Meier MS, Mobley JK, Crocker M. Selective cleavage of the Cα–Cβ linkage in lignin model compounds via Baeyer–Villiger oxidation. Org Biomol Chem 2015; 13:3243-54. [DOI: 10.1039/c4ob01771d] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Selective, catalytic oxidation of benzylic –OH groups followed by Baeyer–Villiger oxidation cleaves the β-O-4 linkage in lignin model compounds.
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Affiliation(s)
| | - Soledad G. Yao
- Department of Chemistry
- University of Kentucky
- Lexington
- USA
| | - Mark S. Meier
- Department of Chemistry
- University of Kentucky
- Lexington
- USA
| | - Justin K. Mobley
- Department of Chemistry
- University of Kentucky
- Lexington
- USA
- University of Kentucky Center for Applied Energy Research
| | - Mark Crocker
- Department of Chemistry
- University of Kentucky
- Lexington
- USA
- University of Kentucky Center for Applied Energy Research
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