1
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Zhou Y, Wang Y, Xu P, Han W, Xiong HY, Zhang G. Synthesis of Indolyl Phenyl Diketones through Visible-Light-Promoted Ni-Catalyzed Intramolecular Cyclization/Oxidation Sequence of Ynones. ACS ORGANIC & INORGANIC AU 2024; 4:241-247. [PMID: 38585509 PMCID: PMC10995934 DOI: 10.1021/acsorginorgau.3c00060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 12/14/2023] [Accepted: 12/18/2023] [Indexed: 04/09/2024]
Abstract
The combination of visible light catalysis and Ni catalysis has enabled the synthesis of indolyl phenyl diketones through the cyclization/oxidation process of ynones. This reaction proceeded under mild and base-free conditions and showed a broad scope and feasibility for gram-scale synthesis. Several natural products and biologically interesting molecules could be readily postfunctionalized by this method.
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Affiliation(s)
- Yufeng Zhou
- College
of Chemistry and Chemical Engineering, Henan
University, Kaifeng, 475004, P. R.
China
| | - Yaping Wang
- College
of Chemistry and Chemical Engineering, Henan
University, Kaifeng, 475004, P. R.
China
| | - Peidong Xu
- College
of Chemistry and Chemical Engineering, Henan
University, Kaifeng, 475004, P. R.
China
| | - Weiwei Han
- College
of Chemistry and Chemical Engineering, Henan
University, Kaifeng, 475004, P. R.
China
| | - Heng-Ying Xiong
- College
of Chemistry and Chemical Engineering, Henan
University, Kaifeng, 475004, P. R.
China
| | - Guangwu Zhang
- College
of Chemistry and Chemical Engineering, Henan
University, Kaifeng, 475004, P. R.
China
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2
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Zhang Z, Zhou Y, Wang J, Zhang Y, Wang L, Liu J, Zhou C, Wang M, Li P. Radical relay cyclization/C-C bond formation of allyloxy-tethered aryl iodides with quinoxalin-2(1 H)-ones via polysulfide anion photocatalysis. Org Biomol Chem 2024; 22:1708-1713. [PMID: 38315045 DOI: 10.1039/d3ob01978k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2024]
Abstract
A visible-light-induced radical relay cyclization/C-C bond formation of quinoxalin-2(1H)-ones with allyloxy-tethered aryl iodides using polysulfide anions as a photocatalyst is described. This protocol allows efficient access to a variety of complicated molecules bearing both quinoxalin-2(1H)-one and 2,3-dihydrobenzofuran motifs in high yields under mild reaction conditions with a broad range of substrates.
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Affiliation(s)
- Zhongyi Zhang
- Advanced Research Institute and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang, Zhejiang, 318000, P. R. China.
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China.
| | - Yaqin Zhou
- Advanced Research Institute and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang, Zhejiang, 318000, P. R. China.
| | - Jiehui Wang
- Advanced Research Institute and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang, Zhejiang, 318000, P. R. China.
| | - Yicheng Zhang
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China.
| | - Lei Wang
- Advanced Research Institute and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang, Zhejiang, 318000, P. R. China.
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China.
- College of Material Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, Zhejiang, P. R. China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, P. R. China
| | - Jie Liu
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China.
| | - Chao Zhou
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China.
| | - Min Wang
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China.
- College of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, P. R. China
| | - Pinhua Li
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China.
- College of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, P. R. China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, P. R. China
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3
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Yan H, Wang FD, Wang M, Ye L, Li P. Photoinduced Radical Cyclization of 2-Alkynylthioanisoles with Disulfides without an External Photocatalyst. J Org Chem 2023; 88:15288-15297. [PMID: 37872481 DOI: 10.1021/acs.joc.3c01776] [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
An efficient strategy for the synthesis of 3-arylthiobenzo[b]thiophenes via a photodriven radical cyclization of 2-alkynylthioanisoles with disulfide was developed. The reaction proceeded smoothly under visible-light irradiation without any external photocatalyst and generated the desired products in high yields with good functional group tolerance.
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Affiliation(s)
- Han Yan
- College of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, P. R. China
| | - Fen-Dou Wang
- College of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, P. R. China
| | - Min Wang
- College of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, P. R. China
| | - Liang Ye
- College of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, P. R. China
| | - Pinhua Li
- College of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, P. R. China
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4
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Wang FD, Wang C, Wang M, Yan H, Jiang J, Li P. Visible-light-induced halocyclization of 2-alkynylthioanisoles with simple alkyl halides towards 3-halobenzo[ b]thiophenes without an external photocatalyst. Org Biomol Chem 2023; 21:8170-8175. [PMID: 37782212 DOI: 10.1039/d3ob00860f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Abstract
A new strategy for the preparation of 3-halobenzo[b]thiophenes via a photo-driven halocyclization/demethylation of 2-alkynylthioanisoles with simple alkyl halides was developed. The reaction can proceed smoothly at room temperature under visible-light irradiation without any external photocatalyst, and the protocol has a range of advantages, including simplicity and mildness of the reaction conditions, good functional-group tolerance, and excellent yields of the products.
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Affiliation(s)
- Fen-Dou Wang
- College of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, P. R. China.
| | - Chunmiao Wang
- College of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, P. R. China.
| | - Min Wang
- College of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, P. R. China.
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education; College of Chemistry and Materials Science, Huaibei Normal University, Huaibei, Anhui 235000, P.R. China.
| | - Han Yan
- College of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, P. R. China.
| | - Jin Jiang
- College of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, P. R. China.
| | - Pinhua Li
- College of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, P. R. China.
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5
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Zhang G, Zhang Y, Li P, Zhou C, Wang M, Wang L. Metal-Free Synthesis of 2 H-Indazole Skeletons by Photochemistry or Thermochemistry. J Org Chem 2023; 88:12341-12356. [PMID: 37582245 DOI: 10.1021/acs.joc.3c01091] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/17/2023]
Abstract
A simple and tuned synthesis of a 2H-indazole skeleton under metal-free conditions was developed. Under visible-light irradiation at room temperature, 2-((aryl/alkyl/H)ethynyl))aryltriazenes reacted with arylsulfinic acids to afford 3-functionalized 2H-indazoles without extra photocatalyst via an electron donor-acceptor complex. In the presence of arylsulfinic acid, 2-(ethynyl)aryltriazenes underwent an intramolecular oxidation/cyclization to provide 2H-indazole-3-carbaldehydes at 50 °C in air.
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Affiliation(s)
- Gan Zhang
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education and Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
| | - Yicheng Zhang
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education and Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
| | - Pinhua Li
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education and Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
| | - Chao Zhou
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education and Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
| | - Min Wang
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education and Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
| | - Lei Wang
- Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education and Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
- Advanced Research Institute and School of Pharmaceutical Sciences, Taizhou University, Taizhou, Zhejiang 318000, P. R. China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Scienes, Shanghai 200032, P. R. China
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6
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Fang J, Pan Z, Liu T, Rao Y, Jiang H, Ma Y. I 2-mediated coupling of quinazolinone enamines with 2-aminopyridines: a new strategy to access spiroquinazolinones. Org Biomol Chem 2023; 21:2355-2360. [PMID: 36847115 DOI: 10.1039/d3ob00083d] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
Herein, we report a novel, rapid and efficient route to the spiroquinazolinone framework via an umpolung strategy mediated by molecular iodine. A library of functionalized spiroquinazolinone iodide salts was synthesized in moderate to good yields under ambient, metal-free and mild conditions. The current methodology opens up a new efficient and concise strategy for the construction of spiroquinazolinones.
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Affiliation(s)
- Jingxi Fang
- Institute of Advanced Studies and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang 318000, Zhejiang, China.
| | - Zhentao Pan
- Institute of Advanced Studies and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang 318000, Zhejiang, China.
| | - Tong Liu
- Institute of Advanced Studies and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang 318000, Zhejiang, China.
| | - Yingbo Rao
- Institute of Advanced Studies and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang 318000, Zhejiang, China.
| | - Huajiang Jiang
- Institute of Advanced Studies and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang 318000, Zhejiang, China.
| | - Yongmin Ma
- Institute of Advanced Studies and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang 318000, Zhejiang, China.
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7
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Hu X, Guo H, Jiang H, Zheng R, Zhou Y, Wang L. Visible-light-induced C(sp 3)-H thiocyanation of pyrazolin-5-ones: a practical synthesis of 4-thiocyanated 5-hydroxy-1 H-pyrazoles. Org Biomol Chem 2023; 21:2232-2235. [PMID: 36810647 DOI: 10.1039/d3ob00092c] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
A direct, aerobic and visible light photocatalytic approach to synthesize 4-thiocyanated 5-hydroxy-1H-pyrazoles via cross-coupling of pyrazolin-5-ones with ammonium thiocyanate is described. Under redox-neutral and metal-free conditions, a series of 4-thiocyanated 5-hydroxy-1H-pyrazoles could be easily and efficiently obtained in good to high yields by using low-toxicity and inexpensive ammonium thiocyanate as the thiocyanate source.
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Affiliation(s)
- Xiurong Hu
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P. R. China.,School of Pharmaceutical and Chemical Engineering, Taizhou University, Jiaojiang, Zhejiang 318000, P. R. China.
| | - Haichang Guo
- School of Pharmaceutical and Chemical Engineering, Taizhou University, Jiaojiang, Zhejiang 318000, P. R. China.
| | - Huajiang Jiang
- School of Pharmaceutical and Chemical Engineering, Taizhou University, Jiaojiang, Zhejiang 318000, P. R. China.
| | - Renhua Zheng
- School of Pharmaceutical and Chemical Engineering, Taizhou University, Jiaojiang, Zhejiang 318000, P. R. China.
| | - Yaqin Zhou
- Department of Chemistry, Taizhou Jiaxin Metering and Testing Co. Ltd., Taizhou, Zhejiang 317000, P. R. China.
| | - Lei Wang
- School of Pharmaceutical and Chemical Engineering, Taizhou University, Jiaojiang, Zhejiang 318000, P. R. China. .,Department of Chemistry, Taizhou Jiaxin Metering and Testing Co. Ltd., Taizhou, Zhejiang 317000, P. R. China.
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8
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Synthesis of thiophosphates by visible-light Daual photoredox/nickel catalysis. Tetrahedron 2023. [DOI: 10.1016/j.tet.2023.133338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
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9
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Lv Y, Hou ZW, Wang Y, Li P, Wang L. Electrochemical monofluoroalkylation cyclization of N-arylacrylamides to construct monofluorinated 2-oxindoles. Org Biomol Chem 2023; 21:1014-1020. [PMID: 36602181 DOI: 10.1039/d2ob01883g] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
An electrochemical monofluoroalkylation cyclization of N-arylacrylamides to synthesize monofluorinated 2-oxindoles has been developed, which employs common dimethyl 2-fluoromalonate as a monofluoroalkyl radical precursor and obviates the use of prefunctionalized monofluoroalkylation reagents and sacrificial oxidants. A variety of monofluorinated nitrogen-containing heterocyclic compounds were efficiently obtained with satisfactory yields from readily available materials.
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Affiliation(s)
- Yanxia Lv
- Advanced Research Institute and School of Pharmaceutical Sciences, Taizhou University, Taizhou 318000, P. R. China. .,Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
| | - Zhong-Wei Hou
- Advanced Research Institute and School of Pharmaceutical Sciences, Taizhou University, Taizhou 318000, P. R. China.
| | - Yi Wang
- The Second Hospital of Anhui Medical University, Heifei, Anhui 230601, P. R. China
| | - Pinhua Li
- Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
| | - Lei Wang
- Advanced Research Institute and School of Pharmaceutical Sciences, Taizhou University, Taizhou 318000, P. R. China. .,Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China.,The Second Hospital of Anhui Medical University, Heifei, Anhui 230601, P. R. China
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10
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Shen M, Li L, Zhou Q, Wang J, Wang L. Visible-Light-Induced Regio-selective Oxidative Coupling of Quinoxalinones with Pyrrole Derivatives. CHINESE J ORG CHEM 2023. [DOI: 10.6023/cjoc202207031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
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11
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Mohamadpour F. Visible-light-driven radical Friedländer hetero-annulation of 2-aminoaryl ketone and α-methylene carbonyl compound via organic dye fluorescein through a single-electron transfer (SET) pathway. BMC Chem 2022; 16:116. [PMID: 36522648 PMCID: PMC9753410 DOI: 10.1186/s13065-022-00910-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Accepted: 12/05/2022] [Indexed: 12/23/2022] Open
Abstract
The discoveries recommend that the photoinduced conditions of fluorescein-determined go about as impetus for photochemically combining polysubstituted quinolines in ethanol at room temperature under air environment by means of revolutionary Friedländer hetero-annulation of 2-aminoaryl ketone and α-methylene carbonyl compound. This study lays out an original capability for photochemically orchestrating fluorescein. This non-metallic organic dye is economically accessible and modest, producing great outcomes, accelerating the cycle, and achieving a high compound economy. The turnover number (TON) and turnover recurrence (TOF) of polysubstituted quinolines have been determined. This cycle will likewise run on a gram scale, demonstrating the chance of modern applications.
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Affiliation(s)
- Farzaneh Mohamadpour
- grid.513953.8School of Engineering, Apadana Institute of Higher Education, Shiraz, Iran
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12
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Gao R, Wang F, Geng X, Li CY, Wang L. Visible-Light-Initiated Difunctionalization of Quinoxalin-2(1 H)-ones with Acyloxy Nitroso Compounds. Org Lett 2022; 24:7118-7122. [DOI: 10.1021/acs.orglett.2c02703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Runye Gao
- Advanced Research Institute and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang, Zhejiang 318000, P. R. China
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P. R. China
| | - Fang Wang
- Advanced Research Institute and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang, Zhejiang 318000, P. R. China
| | - Xiao Geng
- Advanced Research Institute and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang, Zhejiang 318000, P. R. China
| | - Chuan-Ying Li
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P. R. China
| | - Lei Wang
- Advanced Research Institute and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang, Zhejiang 318000, P. R. China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
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13
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Zeng J, Wan JP, Liu Y. Photocatalytic C–H Thiocyanation of NH 2-Enaminones and the Tunable Synthetic Routes to 2-Aminothiazoles and 2-Thiazolinones. J Org Chem 2022; 87:13195-13203. [DOI: 10.1021/acs.joc.2c01667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Junlong Zeng
- National Research Center for Carbohydrate Synthesis, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P.R. China
| | - Jie-Ping Wan
- National Research Center for Carbohydrate Synthesis, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P.R. China
| | - Yunyun Liu
- National Research Center for Carbohydrate Synthesis, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P.R. China
- Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Shaoxing University, Zhejiang 312000, P.R. China
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14
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Wang B, Wang CT, Li XS, Liu XY, Liang YM. Visible-Light-Induced C-F and C-N Bond Cleavage for the Synthesis of gem-Difluoroalkenes. Org Lett 2022; 24:6566-6570. [PMID: 36053062 DOI: 10.1021/acs.orglett.2c02528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Herein, we describe a novel and efficient photoredox catalytic radical addition/defluoroalkylation coupling reaction between primary amines and trifluoromethyl-substituted alkenes. A series of gem-difluoroalkenes were synthesized via C-N bond cleavage of α-3°, α-2°, and α-1° amines under visible light irradiation. This reaction is characterized by a broad substrate scope and good functional group tolerance.
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Affiliation(s)
- Bin Wang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Cui-Tian Wang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Xue-Song Li
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Xue-Yuan Liu
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Yong-Min Liang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
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15
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Huo J, Geng X, Li W, Zhang P, Wang L. Photoinduced Three‐Component Cyclization of Arylamines, Enaminones and Difluorobromoacetates to 2,3‐Difunctionalized Quinolines. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | | | | | | | - Lei Wang
- Huaibei Coal Teachers College CHINA
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16
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Li L, Hou ZW, Li P, Wang L. Electrochemical Dearomatizing Spirocyclization of Alkynes with Dimethyl 2-Benzylmalonate s to Spiro[4.5]deca-trienones. J Org Chem 2022; 87:8697-8708. [PMID: 35679486 DOI: 10.1021/acs.joc.2c00939] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
An electrochemical dearomatizing spirocyclization of alkynes with dimethyl 2-benzylmalonates for the preparation of spiro[4.5]deca-trienones has been developed. This approach adopts ferrocene (Cp2Fe) as an electrocatalyst to produce carbon-centered radical intermediates from C-H-based malonates, which obviates the forthputting of noble-metal reagents, sacrificial chemical oxidants and 2-bromomalonates. A wide variety of spiro compounds are efficiently prepared with satisfactory results under mild conditions.
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Affiliation(s)
- Laiqiang Li
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang, Zhejiang 318000, P. R. China.,Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
| | - Zhong-Wei Hou
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang, Zhejiang 318000, P. R. China
| | - Pinhua Li
- Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
| | - Lei Wang
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang, Zhejiang 318000, P. R. China.,Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
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17
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Gao B, Jiang T, Yang R, Yan Q, Liu X, Xie Q, Zhang X. Palladium-Catalyzed Highly Chemo- and Stereoselective Bisthiolation of Terminal Alkynes with Allyl Phenyl Sulfides via C-S Bond Cleavage. J Org Chem 2022; 87:7895-7904. [PMID: 35666286 DOI: 10.1021/acs.joc.2c00545] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A facile and general method for palladium-catalyzed stereoselective bisthiolation of terminal alkynes with allyl phenyl sulfides has been developed. The scope and versatility of the reaction have been demonstrated, and a broad range of substrates bearing electron-donating and -withdrawing groups on the aromatic rings were all compatible with this reaction, providing the desired (Z)-1,2-dithio-1-alkenes in moderate to good yields. Preliminary mechanistic studies demonstrated that the sulfur source of the desired products may be successively incorporated into alkynes via C-S bond cleavage of two molecules of allyl phenyl sulfides and ruled out the possibility of vinyl sulfides, alkynyl sulfides, and disulfide intermediates being involved in this reaction.
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Affiliation(s)
- Bao Gao
- Department of Applied Chemistry, School of Science, Anhui Agricultural University, Hefei 230036, P. R. China
| | - Tao Jiang
- Department of Applied Chemistry, School of Science, Anhui Agricultural University, Hefei 230036, P. R. China
| | - Ruiting Yang
- Department of Applied Chemistry, School of Science, Anhui Agricultural University, Hefei 230036, P. R. China
| | - Qian Yan
- Department of Applied Chemistry, School of Science, Anhui Agricultural University, Hefei 230036, P. R. China
| | - Xiaojun Liu
- Department of Applied Chemistry, School of Science, Anhui Agricultural University, Hefei 230036, P. R. China
| | - Qiumin Xie
- Department of Applied Chemistry, School of Science, Anhui Agricultural University, Hefei 230036, P. R. China
| | - Xiuli Zhang
- Department of Applied Chemistry, School of Science, Anhui Agricultural University, Hefei 230036, P. R. China
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18
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Hou ZW, Zhang MM, Yang WC, Wang L. Catalyst- and Oxidizing Reagent-Free Electrochemical Benzylic C(sp 3)-H Oxidation of Phenol Derivatives. J Org Chem 2022; 87:7806-7817. [PMID: 35648817 DOI: 10.1021/acs.joc.2c00455] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A site-selective electrochemical approach for the benzylic C(sp3)-H oxidation reaction of phenol derivatives along with hydrogen evolution has been developed. The protocol proceeds in an easily available undivided cell at room temperature under catalyst- and oxidizing reagent-free conditions. The corresponding aryl aldehydes and ketones are obtained in satisfactory yields, and the gram-scale synthesis is easy to be carried out.
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Affiliation(s)
- Zhong-Wei Hou
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang, Zhejiang, Taizhou 318000, P. R. China
| | - Ming-Ming Zhang
- Guangling College and School of Horticulture and Plant Protection, Yangzhou University, Jiangsu, Yangzhou 225009, P. R. China
| | - Wen-Chao Yang
- Guangling College and School of Horticulture and Plant Protection, Yangzhou University, Jiangsu, Yangzhou 225009, P. R. China
| | - Lei Wang
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang, Zhejiang, Taizhou 318000, P. R. China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Shanghai 200032, P. R. China
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19
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Xu Z, Geng X, Cai Y, Wang L. A Straightforward Approach to Fluorinated Pyrimido[1,2- b]indazole Derivatives via Metal/Additive-Free Annulation with Enaminones, 3-Aminoindazoles, and Selectfluor. J Org Chem 2022; 87:6562-6572. [PMID: 35486919 DOI: 10.1021/acs.joc.2c00136] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A novel and efficient three-component reaction with two C-N bonds and one C-F bond formation has been reported, which provides a straightforward route to a variety of fluorinated pyrimido[1,2-b]indazole derivatives. This transformation has the advantage of excellent functional group compatibility, including aliphatic and aromatic substituents enaminones. Moreover, metal and additives are not necessary for this reaction, which is of great significance for the synthesis and application of fluorinated heterocycles.
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Affiliation(s)
- Zhaoliang Xu
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang, Zhejiang 318000, PR China.,Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, PR China
| | - Xiao Geng
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang, Zhejiang 318000, PR China
| | - Yiwen Cai
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang, Zhejiang 318000, PR China
| | - Lei Wang
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang, Zhejiang 318000, PR China.,Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, PR China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Shanghai 200032, PR China
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Zhou Q, Yu HY, Zhou YQ, Wei JR, Wang L. Cu(II)-Mediated aerobic oxidative synthesis of 2-sulfonylated chromeno[4,3-c]pyrazol-4(2H)-ones. Org Biomol Chem 2022; 20:5575-5581. [DOI: 10.1039/d2ob00639a] [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
Herein, a concise and facial synthesis of 2-sulfonylated chromeno [4,3-c]pyrazol-4(2H)-ones and 2,5-dihydro-4H-pyrazolo[4,3-c]quinolin-4-ones via a Cu(II)-promoted aerobic oxidative cascade C–C/C–N bonds formations was described. The protocol has advantages of atom economy,...
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