1
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Chauhan ANS, Vini V, Kumar A, Erande RD. Synthesis of indol-3-yl-benzofurans and carbazoles via Cu(OTf) 2-catalyzed [3 + 2] and [4 + 2] cycloaddition. Org Biomol Chem 2024; 22:6690-6694. [PMID: 39105367 DOI: 10.1039/d4ob00861h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/07/2024]
Abstract
An efficient Cu(OTf)2-catalyzed [3 + 2] cycloaddition of indole-3-acrylate with p-benzoquinone has been developed to construct two distinct indole-tethered benzofuran scaffolds, offering the first-ever selective access to these scaffolds. Moreover, the [4 + 2] cycloaddition reaction of indole-3-acrylate with vinyl ketone derivatives was used to synthesize carbazoles in a one-pot manner. The disclosed strategies provided a series of selective transformations under low-catalyst loading, with a broad substrate scope featuring diverse applicability and practical simplicity of the developed protocol with easily available substrates.
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Affiliation(s)
- Amar Nath Singh Chauhan
- Department of Chemistry, Indian Institute of Technology Jodhpur, Karwar-342037, Rajasthan, India.
| | - Vikrant Vini
- Department of Chemistry, Indian Institute of Technology Jodhpur, Karwar-342037, Rajasthan, India.
| | - Akhilesh Kumar
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea.
| | - Rohan D Erande
- Department of Chemistry, Indian Institute of Technology Jodhpur, Karwar-342037, Rajasthan, India.
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2
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Cheng WF, Gao SZ, Yang YC, Wang L. Copper Catalyzed [3+2] Annulation Reaction of Exocyclic Sulfonyl Enamides for the Synthesis of N,O-Spiroketal and Spiroketal. Chemistry 2024; 30:e202401062. [PMID: 38821866 DOI: 10.1002/chem.202401062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Revised: 04/25/2024] [Accepted: 05/29/2024] [Indexed: 06/02/2024]
Abstract
A copper-catalyzed [3+2] annulation reaction of exocyclic enamines/enol ethers with 1,4-benzoquinone esters has been developed, providing facile access to N,O-spiroketals and spiroketals under mild conditions with broad substrate scope (26 examples, 71-94 % yields). Gram scale synthesis and chemical transformations demonstrated that this method is potentially useful in the synthesis of natural products and drugs containing a N,O- spiroketal moiety. The chiral N,O-spiroketal could be obtained with 98 % ee after recrystallization, when a chiral SaBOX ligand was employed.
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Affiliation(s)
- Wen-Fu Cheng
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Department of Chemistry, East China Normal University, 3663 North Zhongshan Road, Shanghai, 200062, China
| | - Shan-Zeng Gao
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Department of Chemistry, East China Normal University, 3663 North Zhongshan Road, Shanghai, 200062, China
| | - Yu-Chen Yang
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Department of Chemistry, East China Normal University, 3663 North Zhongshan Road, Shanghai, 200062, China
| | - Lijia Wang
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Department of Chemistry, East China Normal University, 3663 North Zhongshan Road, Shanghai, 200062, China
- Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, 3663 North Zhongshan Road, Shanghai, 200062, China, China
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3
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Verma K, Mishra M, Maharana PK, Bhattacharyya H, Saha S, Punniyamurthy T. Sc(OTf) 3-Catalyzed Domino C-C/C-N Bond Formation of Aziridines with Quinones via Radical Pathway. Org Lett 2023; 25:7933-7938. [PMID: 37874042 DOI: 10.1021/acs.orglett.3c03318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
Sc(III)-catalyzed domino C-C and C-N bond formation of N-sulfonyl aziridines with quinones has been accomplished to furnish functionalized indolines at a moderate temperature. The umpolung reactivity of aziridines, radical pathway, mild reaction conditions, substrate scope, and coupling of drug molecules in a postsynthetic application are the important practical features.
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Affiliation(s)
- Kshitiz Verma
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Manmath Mishra
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Prabhat Kumar Maharana
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Hemanga Bhattacharyya
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Sharajit Saha
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
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4
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Erande RD, Shivam S, Chavan KA, Chauhan ANS. Recent Advances in [3+2]-Cycloaddition-Enabled
Cascade Reactions: Application to
Synthesize Complex Organic Frameworks. Synlett 2022. [DOI: 10.1055/s-0042-1751369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
AbstractMany natural products and biologically important complex organic scaffolds have convoluted structures around their core skeleton. Interestingly, with just changing the outskirts, the core reflects new and unique degrees of various physical and chemical properties. A very common but intriguing core is a five-membered ring horning heaps of organic molecules crafts. The power of [3+2] cycloaddition reactions to generate five-membered ring systems allocate chemists to envision synthetic procedures of wonder molecules and if it is facilitating a cascade sequence, then the end product will imbibe significant level of complexity having applications in medicinal and pharmaceutical fields. This Account highlights the broad interest in assembling recent advances in cascade reactions involving [3+2] cycloaddition as the power tool in order to conceive breakthrough organic architectures reported in the last ten years. We foresee that our comprehensive collection of astonishing [3+2] cycloaddition enabled cascades will provide valuable insights to polycyclic molecular construction and perseverant approach towards nonconventional synthetic procedures to the organic community.1 Introduction2 Synthesis of Oxindoles Skeleton3 Synthesis of Oxazoles Skeleton4 Synthesis of Oxadiazoles Skeleton5 Synthesis of Nitrogen-Containing Heterocycles6 Synthesis via Formal [3+2] Cycloaddition7 Synthesis of Miscellaneous Scaffolds8 Conclusion
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5
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Wang JS, Li C, Ying J, Xu T, Lu W, Li CY, Wu XF. Activated carbon fibers supported palladium as efficient and easy-separable catalyst for carbonylative cyclization of o-alkynylphenols with nitroarenes: Facile construction of benzofuran-3-carboxamides. J Catal 2022. [DOI: 10.1016/j.jcat.2022.07.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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6
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Bojack G, Brown RW, Dittgen J, Heinemann I, Helmke H, Hills MJ, Hohmann S, Holstein PM, Schmutzler D, Frackenpohl J. Synthesis and SAR of 2,3‐Dihydro‐1‐benzofuran‐4‐carboxylates: Potent Salicylic Acid‐Based Lead Structures against Plant Stress. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Guido Bojack
- Research & Development, Weed Control CropScience Division Bayer AG Industriepark Höchst D-65926 Frankfurt am Main Germany
| | - Ronald W. Brown
- Research & Development, Weed Control CropScience Division Bayer AG Industriepark Höchst D-65926 Frankfurt am Main Germany
| | - Jan Dittgen
- Research & Development, Weed Control CropScience Division Bayer AG Industriepark Höchst D-65926 Frankfurt am Main Germany
| | - Ines Heinemann
- Research & Development, Weed Control CropScience Division Bayer AG Industriepark Höchst D-65926 Frankfurt am Main Germany
| | - Hendrik Helmke
- Research & Development, Weed Control CropScience Division Bayer AG Industriepark Höchst D-65926 Frankfurt am Main Germany
| | - Martin J. Hills
- Research & Development, Weed Control CropScience Division Bayer AG Industriepark Höchst D-65926 Frankfurt am Main Germany
| | - Sabine Hohmann
- Research & Development, Weed Control CropScience Division Bayer AG Industriepark Höchst D-65926 Frankfurt am Main Germany
| | - Philipp M. Holstein
- Research & Development Pharmaceuticals Bayer AG Building 0460 42096 Wuppertal Germany
| | - Dirk Schmutzler
- Research & Development, Weed Control CropScience Division Bayer AG Industriepark Höchst D-65926 Frankfurt am Main Germany
| | - Jens Frackenpohl
- Research & Development, Weed Control CropScience Division Bayer AG Industriepark Höchst D-65926 Frankfurt am Main Germany
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7
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Kabi AK, Gujjarappa R, Vodnala N, Kaldhi D, Tyagi U, Mukherjee K, Malakar CC. HFIP-mediated strategy towards β-oxo amides and subsequent Friedel-Craft type cyclization to 2‑quinolinones using recyclable catalyst. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152535] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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8
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Jash M, De S, Pramanik S, Chowdhury C. Palladium(II)-Catalyzed Cascade Reactions of Ene–Ynes Tethered to Cyano/Aldehyde: Access to Naphtho[1,2-b]furans and Benzo[g]indoles. J Org Chem 2019; 84:8959-8975. [DOI: 10.1021/acs.joc.9b00861] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Moumita Jash
- Organic & Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4 Raja S.C. Mullick Road, Kolkata 700032, India
| | - Sukanya De
- Organic & Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4 Raja S.C. Mullick Road, Kolkata 700032, India
| | - Subhendu Pramanik
- Organic & Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4 Raja S.C. Mullick Road, Kolkata 700032, India
| | - Chinmay Chowdhury
- Organic & Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4 Raja S.C. Mullick Road, Kolkata 700032, India
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9
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Mao S, Wan Y, Peng H, Luo L, Deng G. Synthesis of Trifunctionalized Naphtho[1,2-b]furans Based on the Strategy for the Construction of Both Furan and Naphthalene Cycle. J Org Chem 2019; 84:5261-5270. [DOI: 10.1021/acs.joc.9b00058] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Shanjian Mao
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) and Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Hunan Normal University, Changsha 410081, China
| | - Yinbo Wan
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) and Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Hunan Normal University, Changsha 410081, China
| | - Haiyun Peng
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) and Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Hunan Normal University, Changsha 410081, China
| | - Li Luo
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) and Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Hunan Normal University, Changsha 410081, China
| | - Guisheng Deng
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) and Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Hunan Normal University, Changsha 410081, China
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10
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Calabrese DR, Chen X, Leon EC, Gaikwad SM, Phyo Z, Hewitt WM, Alden S, Hilimire TA, He F, Michalowski AM, Simmons JK, Saunders LB, Zhang S, Connors D, Walters KJ, Mock BA, Schneekloth JS. Chemical and structural studies provide a mechanistic basis for recognition of the MYC G-quadruplex. Nat Commun 2018; 9:4229. [PMID: 30315240 PMCID: PMC6185959 DOI: 10.1038/s41467-018-06315-w] [Citation(s) in RCA: 119] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 08/16/2018] [Indexed: 01/06/2023] Open
Abstract
G-quadruplexes (G4s) are noncanonical DNA structures that frequently occur in the promoter regions of oncogenes, such as MYC, and regulate gene expression. Although G4s are attractive therapeutic targets, ligands capable of discriminating between different G4 structures are rare. Here, we describe DC-34, a small molecule that potently downregulates MYC transcription in cancer cells by a G4-dependent mechanism. Inhibition by DC-34 is significantly greater for MYC than other G4-driven genes. We use chemical, biophysical, biological, and structural studies to demonstrate a molecular rationale for the recognition of the MYC G4. We solve the structure of the MYC G4 in complex with DC-34 by NMR spectroscopy and illustrate specific contacts responsible for affinity and selectivity. Modification of DC-34 reveals features required for G4 affinity, biological activity, and validates the derived NMR structure. This work advances the design of quadruplex-interacting small molecules to control gene expression in therapeutic areas such as cancer. Targeting noncoding nucleic acids with small molecules represents an important and significant challenge in chemical biology and drug discovery. Here the authors characterize DC-34, a small molecule that exhibits selective binding to specific G4 structures, and provide a structural basis for its selectivity
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Affiliation(s)
- David R Calabrese
- Chemical Biology Laboratory, National Cancer Institute, Frederick, MD, 21702, USA
| | - Xiang Chen
- Structural Biophysics Laboratory, National Cancer Institute, Frederick, MD, 21702, USA
| | - Elena C Leon
- Laboratory of Cancer Biology and Genetics, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Snehal M Gaikwad
- Laboratory of Cancer Biology and Genetics, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Zaw Phyo
- Laboratory of Cancer Biology and Genetics, National Cancer Institute, Bethesda, MD, 20892, USA
| | - William M Hewitt
- Chemical Biology Laboratory, National Cancer Institute, Frederick, MD, 21702, USA
| | - Stephanie Alden
- Chemical Biology Laboratory, National Cancer Institute, Frederick, MD, 21702, USA
| | - Thomas A Hilimire
- Chemical Biology Laboratory, National Cancer Institute, Frederick, MD, 21702, USA
| | - Fahu He
- Structural Biophysics Laboratory, National Cancer Institute, Frederick, MD, 21702, USA
| | | | - John K Simmons
- Laboratory of Cancer Biology and Genetics, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Lindsey B Saunders
- Chemical Biology Laboratory, National Cancer Institute, Frederick, MD, 21702, USA
| | - Shuling Zhang
- Laboratory of Cancer Biology and Genetics, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Daniel Connors
- Laboratory of Cancer Biology and Genetics, National Cancer Institute, Bethesda, MD, 20892, USA
| | - Kylie J Walters
- Structural Biophysics Laboratory, National Cancer Institute, Frederick, MD, 21702, USA.
| | - Beverly A Mock
- Laboratory of Cancer Biology and Genetics, National Cancer Institute, Bethesda, MD, 20892, USA.
| | - John S Schneekloth
- Chemical Biology Laboratory, National Cancer Institute, Frederick, MD, 21702, USA.
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11
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Base-promoted 1,3-dipolar cycloaddition reaction of nitrile oxides with methyl 1,4-dioxo-1,4-dihydronaphthalene-2-carboxylate for the construction of naphtho[2,3- d ]isoxazole-4,9(3a H ,9a H )-diones. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.04.077] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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12
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13
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Cai H, Xia L, Lee YR. Regioselective construction of diverse and multifunctionalized 2-hydroxybenzophenones for sun protection by indium(iii)-catalyzed benzannulation. Chem Commun (Camb) 2016; 52:7661-4. [DOI: 10.1039/c6cc02381a] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Highly regioselective synthesis of 2-hydroxybenzophenones via the In(OTf)3-catalyzed formal [2+2+2] and [4+2] benzannulations has been successfully developed and their application as sun protection materials was also evaluated.
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Affiliation(s)
- Hongyun Cai
- School of Chemical Engineering
- Yeungnam University
- Gyeongsan 712-749
- Republic of Korea
| | - Likai Xia
- 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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14
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Xia L, Idhayadhulla A, Lee YR. Re2O7-catalyzed formal [3 + 2] cycloaddition for diverse naphtho[1,2-b]furan-3-carboxamides and their biological evaluation. Mol Divers 2015; 20:17-28. [PMID: 26260267 DOI: 10.1007/s11030-015-9630-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Accepted: 08/02/2015] [Indexed: 10/23/2022]
Abstract
Diverse naphtho[1,2-b]furan-3-carboxamide derivatives 12a-12q were synthesized in high yield via the novel Re2O7-catalyzed formal [3 + 2] cycloaddition of 1,4-naphthoquinones with β-ketoamides as the key step. This methodology offers several advantages, such as environmentally benign character, the use of a mild catalyst, high yields, and ease of handling. The synthesized compounds were screened for their tyrosinase inhibitory, antioxidant, and antibacterial activities. The results showed that compound 12c exhibited excellent tyrosinase inhibitory activity with an IC50 of 13.48 μg/mL, which is comparable to that of kojic acid (IC50 = 19.45 μg/mL). Compounds 12a, 12b, and 12i displayed moderate antioxidant activities in a DPPH assay. Compound 12m showed good activity against S. aureus (MIC = 16 μg/mL), and compound 12p was found to be active against E. coli (MIC = 16 μg/mL).
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Affiliation(s)
- Likai Xia
- School of Chemical Engineering, Yeungnam University, Gyeongsan, 712-749, Republic of Korea
| | - Akber Idhayadhulla
- 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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15
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He Y, Zhang X, Fan X. Synthesis of diversely substituted 2-(furan-3-yl)acetates from allenols through cascade carbonylations. Chem Commun (Camb) 2015; 51:16263-6. [PMID: 26399394 DOI: 10.1039/c5cc06150d] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Novel synthesis of diversely substituted 2-(furan-3-yl)acetatesviapalladium-catalyzed one-pot multi-component reactions of allenols, aryl iodides, alcohols, and carbon monoxide has been developed. Moreover, the 2-(furan-3-yl)acetates obtained were found to be ready intermediates for the construction of the biologically significant naphtho[1,2-b]furan-5-ol scaffold.
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Affiliation(s)
- Yan He
- School of Environment
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
| | - Xinying Zhang
- School of Environment
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
| | - Xuesen Fan
- School of Environment
- School of Chemistry and Chemical Engineering
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
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16
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Mishra K, Basavegowda N, Lee YR. Biosynthesis of Fe, Pd, and Fe–Pd bimetallic nanoparticles and their application as recyclable catalysts for [3 + 2] cycloaddition reaction: a comparative approach. Catal Sci Technol 2015. [DOI: 10.1039/c5cy00099h] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The Fe–Pd bimetallic nanoparticles exhibit strong catalytic activity compared to their respective monometallic nanoparticles.
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Affiliation(s)
- Kanchan Mishra
- School of Chemical Engineering
- Yeungnam University
- Gyeongsan 712-749
- Republic of Korea
| | - Nagaraj Basavegowda
- 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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17
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Xia L, Somai Magar KB, Lee YR. Synthesis of novel and diverse naphtho[1,2-b]furans by phosphine-catalyzed [3+2] annulation of activated 1,4-naphthoquinones and acetylenecarboxylates. Mol Divers 2014; 19:55-66. [DOI: 10.1007/s11030-014-9555-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Accepted: 09/12/2014] [Indexed: 01/06/2023]
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