1
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Chen D, Song ZJ, Yan S, Li G, Wang JY, Zhang Y. Photoinduced radical tandem annulation of 1,7-diynes: an approach for divergent assembly of functionalized quinolin-2(1H)-ones. Front Chem 2024; 12:1371978. [PMID: 38595704 PMCID: PMC11002210 DOI: 10.3389/fchem.2024.1371978] [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: 01/17/2024] [Accepted: 02/26/2024] [Indexed: 04/11/2024] Open
Abstract
The first photocatalytic trichloromethyl radical-triggered annulative reactions of amide-linked 1,7-diynes with polyhalomethanes were established for the flexible assembly of functionalized quinolin-2(1H)-ones with generally acceptable yields. With the installation of the aryl group (R1) into the alkynyl moiety, C-center radical-initiated Kharasch-type addition/nucleophilic substitution/elimination cascade to produce quinolin-2(1H)-ones-incorporating gem-dihaloalkene, whereas three examples of polyhalogenated quinolin-2(1H)-ones were afforded when amide-linked 1,7-diynes bearing two terminal alkyne units were subjected to BrCX3 by exploiting dry acetonitrile as a solvent.
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Affiliation(s)
- Daixiang Chen
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu, China
| | - Zhi-Jie Song
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu, China
| | - Shenghu Yan
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu, China
| | - Guigen Li
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, United States
| | - Jia-Yin Wang
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu, China
| | - Yue Zhang
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu, China
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2
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Xu L, Shi H. Cobalt-catalyzed divergent functionalization of N-sulfonyl amines via β-carbon elimination. Sci China Chem 2022. [DOI: 10.1007/s11426-022-1251-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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3
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Jo DG, Kim C, Lee S, Yun S, Joung S. Synthesis of Cyclic N-Acyl Amidines by [3 + 2] Cycloaddition of N-Silyl Enamines and Activated Acyl Azides. Molecules 2022; 27:molecules27051696. [PMID: 35268798 PMCID: PMC8912012 DOI: 10.3390/molecules27051696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 02/24/2022] [Accepted: 03/02/2022] [Indexed: 11/16/2022] Open
Abstract
In this study, we describe the synthesis of cyclic N-acyl amidines from readily available N-heteroarenes. The synthetic methodology utilized the versatile N-silyl enamine intermediates from the hydrosilylation of N-heteroarenes for the [3 + 2] cycloaddition reaction step. We evaluated various acyl azides and selected an electronically activated acyl azide, thereby achieving a reasonable yield of cyclic N-acyl amidines. We analyzed the relationship between the reactivity of each step and the electronic nature of substrates using in situ nuclear magnetic resonance spectroscopy. In addition, we demonstrated gram-scale synthesis using the proposed methodology.
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4
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Han XD, Peng GL, Xiong W, Gan R, Fu JP, Wu L, Tang ZS, Hu JW, Wang HB. A base-mediated aerobic oxidative synthesis of cyclopent-2-enol derivatives from doubly activated cyclopropanes and substituted acetonitriles. Org Biomol Chem 2022; 20:1095-1102. [PMID: 35019920 DOI: 10.1039/d1ob02155a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
We report here that polysubstituted cyclopent-2-enols can be constructed by the one-pot reaction of doubly activated cyclopropanes and α-EWG substituted acetonitriles under mild basic conditions via a domino-ring-opening-cyclization/deacylation/oxidation sequence. Moreover, the synthetic applications of these cyclopent-2-enols have been demonstrated in the late-stage derivatization into functionalized cyclopentapyrimidin-4-ones and 2-hydroxy cyclopentanones with good yields.
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Affiliation(s)
- Xiao-Dan Han
- Department of Applied Chemistry, Jiang Xi Academy of Sciences, Nanchang, 330096, China.
| | - Gao-Liang Peng
- Jiangxi University of Applied Science, Nanchang, 330100, China
| | - Wei Xiong
- Department of Applied Chemistry, Jiang Xi Academy of Sciences, Nanchang, 330096, China.
| | - Ran Gan
- Jiangxi Academy of Forestry, Nanchang, 330096, China
| | - Jian-Ping Fu
- Department of Applied Chemistry, Jiang Xi Academy of Sciences, Nanchang, 330096, China.
| | - Lei Wu
- Department of Applied Chemistry, Jiang Xi Academy of Sciences, Nanchang, 330096, China.
| | - Zhong-Sheng Tang
- Department of Applied Chemistry, Jiang Xi Academy of Sciences, Nanchang, 330096, China.
| | - Ju-Wu Hu
- Department of Applied Chemistry, Jiang Xi Academy of Sciences, Nanchang, 330096, China.
| | - Hui-Bin Wang
- Department of Applied Chemistry, Jiang Xi Academy of Sciences, Nanchang, 330096, China.
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5
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Sokolova OO, Bower JF. Selective Carbon–Carbon Bond Cleavage of Cyclopropylamine Derivatives. Chem Rev 2020; 121:80-109. [DOI: 10.1021/acs.chemrev.0c00166] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Olga O. Sokolova
- School of Chemistry, University of Bristol, Bristol BS8 1TS, United Kingdom
| | - John F. Bower
- School of Chemistry, University of Bristol, Bristol BS8 1TS, United Kingdom
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, United Kingdom
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6
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Cao VD, Mun SH, Kim SH, Kim GU, Kim HG, Joung S. Synthesis of Cyclic Amidines from Quinolines by a Borane-Catalyzed Dearomatization Strategy. Org Lett 2020; 22:515-519. [DOI: 10.1021/acs.orglett.9b04275] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Vinh Do Cao
- Department of Chemistry, Mokpo National University, Muan, Jeonnam 58554, Republic of Korea
| | - So Hwa Mun
- Department of Chemistry, Mokpo National University, Muan, Jeonnam 58554, Republic of Korea
| | - Seo Ha Kim
- Department of Chemistry, Mokpo National University, Muan, Jeonnam 58554, Republic of Korea
| | - Gyeong Un Kim
- Department of Chemistry, Mokpo National University, Muan, Jeonnam 58554, Republic of Korea
| | - Hyung Guk Kim
- Department of Chemistry, Mokpo National University, Muan, Jeonnam 58554, Republic of Korea
| | - Seewon Joung
- Department of Chemistry, Mokpo National University, Muan, Jeonnam 58554, Republic of Korea
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7
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Gao RX, Luan XQ, Xie ZY, Yang L, Pei Y. Fe-Catalyzed decarbonylative cascade reaction of N-aryl cinnamamides with aliphatic aldehydes to construct 3,4-dihydroquinolin-2(1H)-ones. Org Biomol Chem 2019; 17:5262-5268. [PMID: 31086867 DOI: 10.1039/c9ob00492k] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A practical Fe-catalyzed decarbonylative cascade reaction of N-aryl cinnamamides with aliphatic aldehydes to provide C3 alkylated 3,4-dihydroquinolin-2(1H)-ones is developed. Aliphatic aldehydes were oxidatively decarbonylated into 1°, 2° and 3° alkyl radicals conveniently, allowing for the subsequent cascade construction of C(sp3)-C(sp3) and C(sp3)-C(sp2) bonds via radical addition and HAS-type cyclization. The importance of the amide linkage and the selectivity of the 6-endo-trig over 5-exo-trig cyclization pathway were elucidated by experimental results and DFT calculations.
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Affiliation(s)
- Ru-Xin Gao
- Key Laboratory for Environmentally Friendly Chemistry and Application of the Ministry of Education, Key Laboratory for Green Organic Synthesis and Application of Hunan Province, College of Chemistry, Xiangtan University, Hunan, 411105, PR China.
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8
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Xu X, Luo Z, Liu C, Wang X, Deng L, Gao J. Metal‐Free Synthesis of 3,4‐Dihydroquinolin‐2(1
H
)‐Ones via Cascade Oxidative Decarbonylative Radical Alkylation/Cyclization of Cinnamamides with Aliphatic Aldehydes. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900424] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xuemei Xu
- College of Chemical EngineeringAnHui University of Science and Technology Huainan 232001 China
| | - Zaigang Luo
- College of Chemical EngineeringAnHui University of Science and Technology Huainan 232001 China
| | - Chen‐Fu Liu
- School of Pharmaceutical ScienceGannan Medical University Ganzhou 341000 China
| | - Xiuxiu Wang
- College of Chemical EngineeringAnHui University of Science and Technology Huainan 232001 China
| | - Liangdan Deng
- College of Chemical EngineeringAnHui University of Science and Technology Huainan 232001 China
| | - Jie Gao
- College of Chemical EngineeringAnHui University of Science and Technology Huainan 232001 China
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9
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Wu L, Hao Y, Liu Y, Wang Q. NIS-mediated oxidative arene C(sp 2)-H amidation toward 3,4-dihydro-2(1H)-quinolinone, phenanthridone, and N-fused spirolactam derivatives. Org Biomol Chem 2019; 17:6762-6770. [PMID: 31245805 DOI: 10.1039/c9ob01277j] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new radical-mediated intramolecular arene C(sp2)-H amidation of 3-phenylpropanamides or [1,1'-biphenyl]-2-carboxamides was developed to prepare a series of 3,4-dihydro-2(1H)-quinolinone and phenanthridone derivatives in moderate to excellent yields (33-94%). Spirolactams could also be obtained using this protocol.
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Affiliation(s)
- Lingang Wu
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, P.R. China.
| | - Yanan Hao
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, P.R. China.
| | - Yuxiu Liu
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, P.R. China.
| | - Qingmin Wang
- State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, P.R. China.
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10
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Mizufune H. Efficient Azacycle Formations Developed in Japanese Pharmaceutical Industries: Elegancy, Logistics, and Training (ELT) “Sandwich” for Process Chemists. Org Process Res Dev 2019. [DOI: 10.1021/acs.oprd.8b00412] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Hideya Mizufune
- Chemical R&D Division, SPERA PHARMA, Inc., 17-85 Jusohonmachi 2-chome, Yodogawa-ku, Osaka 532-0024, Japan
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11
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Silva VLM, Silva AMS. Palladium-Catalysed Synthesis and Transformation of Quinolones. Molecules 2019; 24:E228. [PMID: 30634524 PMCID: PMC6359680 DOI: 10.3390/molecules24020228] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Revised: 12/31/2018] [Accepted: 01/04/2019] [Indexed: 11/16/2022] Open
Abstract
Palladium-catalysed reactions have had a large impact on synthetic organic chemistry and have found many applications in target-oriented synthesis. Their widespread use in organic synthesis is due to the mild conditions associated with the reactions together with their tolerance of a wide range of functional groups. Moreover, these types of reactions allow the rapid construction of complex molecules through multiple bond-forming reactions in a single step, the so-called tandem processes. Pd-catalysed reactions have been applied to the synthesis of a large number of natural products and bioactive compounds, some of them of complex molecular structures. This review article aims to present an overview of the most important Pd-catalysed reactions employed in the synthesis and transformations of quinolin-2(1H)-ones and quinolin-4(1H)-ones. These compounds are widely recognized by their diverse bioactivity, being privileged structures in medicinal chemistry and useful structural moieties for the development of new drug candidates. Furthermore, they hold significant interest due to their host⁻guest chemistry; applications in chemical, biochemical and environmental analyses and use in the development of new synthetic methods. In some cases, the quinolone formation step cannot be ascribed to a claimed Pd-catalysed reaction but this reaction is crucial to get the appropriate substrate for cyclization into the quinolone. Herein we present and discuss different economical, efficient and selective synthetic strategies to access quinolone-type compounds.
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Affiliation(s)
- Vera L M Silva
- Department of Chemistry QOPNA and LAQV-REQUIMTE, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
| | - Artur M S Silva
- Department of Chemistry QOPNA and LAQV-REQUIMTE, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
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12
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Chuang TH, Chuang CP. Organic amine-mediated free-radical carbocyclization reactions of 2,2,2-trihalogeno-substituted N-(2-alkynylphenyl)acetamides. Org Biomol Chem 2018; 16:7265-7273. [PMID: 30259031 DOI: 10.1039/c8ob01870g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient method for the synthesis of 3-halogeno-substituted 4-benzoylquinolin-2-(1H)-ones from N-(2-alkynylphenyl)-substituted trihaloacetamides has been developed, in which organic amines (TNPA and DIEA) act as the electron donors. In this carbocyclization reaction, a new C-C bond formation occurred regioselectively via a 6-exo-dig radical cyclization. A variety of useful functional groups are compatible with the reaction conditions. In this process, readily removable organic amines were employed and no heavy metal catalysts were required.
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Affiliation(s)
- Tsung-Han Chuang
- Department of Chemistry, National Cheng Kung University, Tainan, Taiwan 70101, Republic of China.
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13
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Cheng YC, Chen YY, Chuang CP. Cobalt salt-catalyzed carbocyclization reactions of α-bromo-N-phenylacetamide derivatives. Org Biomol Chem 2017; 15:2020-2032. [DOI: 10.1039/c7ob00009j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A Co(ii)-catalyzed carbocyclization reaction for the synthesis of 4-substituted quinolin-2-(1H)-ones is described.
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Affiliation(s)
- Yi-Chen Cheng
- Department of Chemistry
- National Cheng Kung University
- Tainan
- Republic of China
| | - Ying-Yu Chen
- Department of Chemistry
- National Cheng Kung University
- Tainan
- Republic of China
| | - Che-Ping Chuang
- Department of Chemistry
- National Cheng Kung University
- Tainan
- Republic of China
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14
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Chuang CP, Chen YJ. Manganese(III) acetate mediated oxidative radical cyclizations of α-substituted N-[2-(phenylethynyl)phenyl]acetamides. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.02.041] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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15
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Zhang H, Gu Z, Li Z, Pan C, Li W, Hu H, Zhu C. Silver-Catalyzed Cascade Radical Cyclization: A Direct Approach to 3,4-Disubstituted Dihydroquinolin-2(1H)-ones through Activation of the P–H Bond and Functionalization of the C(sp2)–H Bond. J Org Chem 2016; 81:2122-7. [DOI: 10.1021/acs.joc.5b01879] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Honglin Zhang
- State
Key Laboratory of Coordination Chemistry, School of Chemistry and
Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Zhangxi Gu
- State
Key Laboratory of Coordination Chemistry, School of Chemistry and
Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Zhenyi Li
- State
Key Laboratory of Coordination Chemistry, School of Chemistry and
Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Changduo Pan
- State
Key Laboratory of Coordination Chemistry, School of Chemistry and
Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Weipeng Li
- State
Key Laboratory of Coordination Chemistry, School of Chemistry and
Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Hongwen Hu
- State
Key Laboratory of Coordination Chemistry, School of Chemistry and
Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Chengjian Zhu
- State
Key Laboratory of Coordination Chemistry, School of Chemistry and
Chemical Engineering, Nanjing University, Nanjing 210093, China
- Shanghai
Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
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16
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Chmielewska E, Miszczyk P, Kozłowska J, Prokopowicz M, Młynarz P, Kafarski P. Reaction of benzolactams with triethyl phosphite prompted by phosphoryl chloride affords benzoannulated monophosphonates instead of expected bisphoshonates. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.03.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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17
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Xia AB, Zhang XL, Wang T, Du XH, Xu DQ, Xu ZY. Enantioselective synthesis of functionalized 3,4-disubstituted dihydro-2(1H)-quinolinones via Michael–hemiaminalization/oxidation reaction. NEW J CHEM 2015. [DOI: 10.1039/c4nj01718h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new method is developed for the enantioselective synthesis of highly functionalized 3,4-disubstituted dihydro-2(1H)-quinolinones bearing two trans contiguous stereogenic centers.
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Affiliation(s)
- Ai-Bao Xia
- Catalytic Hydrogenation Research Centre
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology
- Zhejiang University of Technology
- Hangzhou
- China
| | - Xiao-Long Zhang
- Catalytic Hydrogenation Research Centre
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology
- Zhejiang University of Technology
- Hangzhou
- China
| | - Tao Wang
- Catalytic Hydrogenation Research Centre
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology
- Zhejiang University of Technology
- Hangzhou
- China
| | - Xiao-Hua Du
- Catalytic Hydrogenation Research Centre
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology
- Zhejiang University of Technology
- Hangzhou
- China
| | - Dan-Qian Xu
- Catalytic Hydrogenation Research Centre
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology
- Zhejiang University of Technology
- Hangzhou
- China
| | - Zhen-Yuan Xu
- Catalytic Hydrogenation Research Centre
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology
- Zhejiang University of Technology
- Hangzhou
- China
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18
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Hurst TE, Gorman RM, Drouhin P, Perry A, Taylor RJK. A Direct CH/ArH Coupling Approach to Oxindoles, Thio‐oxindoles, 3,4‐Dihydro‐1
H
‐quinolin‐2‐ones, and 1,2,3,4‐Tetrahydroquinolines. Chemistry 2014; 20:14063-73. [DOI: 10.1002/chem.201403917] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Indexed: 12/27/2022]
Affiliation(s)
- Timothy E. Hurst
- Department of Chemistry, University of York, Heslington, York, YO10 5DD (UK), Fax: (+44) 1904324523
| | - Ryan M. Gorman
- Department of Chemistry, University of York, Heslington, York, YO10 5DD (UK), Fax: (+44) 1904324523
| | - Pauline Drouhin
- Department of Chemistry, University of York, Heslington, York, YO10 5DD (UK), Fax: (+44) 1904324523
| | - Alexis Perry
- Physics and Medical Imaging, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Physics Building, Stocker Road, Exeter, EX4 4QL (UK)
| | - Richard J. K. Taylor
- Department of Chemistry, University of York, Heslington, York, YO10 5DD (UK), Fax: (+44) 1904324523
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19
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Khan S, Roy S, Roy R, Ghatak A, Pramanik A, Bhar S. Cyanuric chloride–dimethylformamide mediated cleavage of cyclopropylcarbinols-synthesis of phenolic antioxidant and construction of a new vinylcyclopropane skeleton. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.07.053] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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20
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Mai WP, Wang JT, Yang LR, Yuan JW, Xiao YM, Mao P, Qu LB. Silver-Catalyzed Radical Tandem Cyclization for the Synthesis of 3,4-Disubstituted Dihydroquinolin-2(1H)-ones. Org Lett 2013; 16:204-7. [DOI: 10.1021/ol403196h] [Citation(s) in RCA: 106] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Wen-Peng Mai
- Chemistry and Chemical Engineering
School, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China
| | - Ji-Tao Wang
- Chemistry and Chemical Engineering
School, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China
| | - Liang-Ru Yang
- Chemistry and Chemical Engineering
School, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China
| | - Jin-Wei Yuan
- Chemistry and Chemical Engineering
School, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China
| | - Yong-Mei Xiao
- Chemistry and Chemical Engineering
School, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China
| | - Pu Mao
- Chemistry and Chemical Engineering
School, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China
| | - Ling-Bo Qu
- Chemistry and Chemical Engineering
School, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China
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21
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Xie P, Wang ZQ, Deng GB, Song RJ, Xia JD, Hu M, Li JH. Copper-Catalyzed Aerobic Oxidative Carbocyclization- Ketonization Cascade: Selective Synthesis of Quinolinones. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300160] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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22
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Mack DJ, Njardarson JT. Recent Advances in the Metal-Catalyzed Ring Expansions of Three- and Four-Membered Rings. ACS Catal 2013. [DOI: 10.1021/cs300771d] [Citation(s) in RCA: 242] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Daniel J. Mack
- Department of Chemistry and Chemical
Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Jon T. Njardarson
- Department of Chemistry and
Biochemistry, University of Arizona, 1306
E. University Blvd., Tucson, Arizona 85721, United States
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23
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Wang Y, Lin Y, Liu Y. Reactions of Propargyl Compounds Containing a Cyclobutyl Group Induced by a Ruthenium Complex. Chem Asian J 2012; 7:2703-10. [DOI: 10.1002/asia.201200589] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Indexed: 11/08/2022]
Affiliation(s)
- Yung‐Ching Wang
- Department of Chemistry, National Taiwan University, Taipei, 106 (Taiwan), Fax: (+886) 223636359
| | - Ying‐Chih Lin
- Department of Chemistry, National Taiwan University, Taipei, 106 (Taiwan), Fax: (+886) 223636359
| | - Yi‐Hung Liu
- Department of Chemistry, National Taiwan University, Taipei, 106 (Taiwan), Fax: (+886) 223636359
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24
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Liu X, Xin X, Xiang D, Zhang R, Kumar S, Zhou F, Dong D. Facile and efficient synthesis of quinolin-2(1H)-ones via cyclization of penta-2,4-dienamides mediated by H2SO4. Org Biomol Chem 2012; 10:5643-6. [DOI: 10.1039/c2ob25767j] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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de Araujo AD, Christensen C, Buchardt J, Kent SBH, Alewood PF. Synthesis of tripeptide mimetics based on dihydroquinolinone and benzoxazinone scaffolds. Chemistry 2011; 17:13983-6. [PMID: 22084036 DOI: 10.1002/chem.201102732] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2011] [Indexed: 11/06/2022]
Affiliation(s)
- Aline Dantas de Araujo
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, QLD 4072, Australia
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Chen CC, Cheng PC, Huang SL, Lin YC, Liu YH. Reactions of ruthenium-allenylidene complexes tethering a cyclopropyl group. Chem Asian J 2011; 6:3122-31. [PMID: 21853534 DOI: 10.1002/asia.201100297] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2011] [Indexed: 11/06/2022]
Abstract
Two cyclopropyl allenylidene complexes [Ru]=C=C=C(R)(C(3)H(5)) ([Ru]=[RuCp(PPh(3))(2)], Cp=Cyclopentadienyl; R=thiophene (2a) and R=Ph (2b)) are prepared from the reactions of [Ru]Cl with the corresponding 1-cyclopropyl-2-propyn-1-ol in the presence of KPF(6). Thermal treatment, halide-anion addition, and palladium-catalyzed reactions of 2a and 2b all lead to a ring expansion of the cyclopropyl group, giving the vinylidene complexes 4a and 4b, respectively, each with a five-membered ring. This ring expansion proceeds by C-C bond formation between Cβ of the cumulative double bond and a methylene group of the cyclopropyl ring. In the reaction of 2a with pyrrole, consecutive formation of two C-C bonds, one between C-2 of pyrrole and Cγ of 2a and the other between C-3 of pyrrole and Cα, results in the formation of 6a. The reaction proceeds by addition of pyrrole and 1,3-proton shifts. The hydrogenation of 2a by NaBH(4) is carried out in different solvents. The cumulative double bonds are reduced regioselectively to give a mixture of 7a and 8a. Interestingly, use of different solvents leads to different ratios of 7a and 8a. Presence of a protic solvent like methanol in dichloromethane or chloroform solution increases the yield of 8a, thus revealing that both the rates of hydroboration and deboronation increase. The structures of two new complexes 4a and 6a have been firmly established by X-ray diffraction analysis.
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Affiliation(s)
- Chien-Chih Chen
- Department of Chemistry, National Taiwan University, Taipei, 106, Taiwan
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Fu X, Huang P, Zhou G, Hu Y, Dong D. Divergent synthesis of fully substituted isoxazoles and spiro-fused pyrazolin-5-ones from cyclopropyl oximes. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.05.136] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Fesenko AA, Trafimova LA, Cheshkov DA, Shutalev AD. The dramatic effect of thiophenol on the reaction pathway of ethyl 4-chloromethyl-6-methyl-2-oxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate with thiophenolates: ring expansion versus nucleophilic substitution. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.07.098] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Lewis acid-mediated reactions of 1-cyclopropyl-2-arylethanone derivatives with diethyl 2-oxomalonate and ethyl 2-oxoacetate. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.09.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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