1
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Li NK, Sun BB, Chen JB, Yang HD, Wang BL, Yu JQ, Wang XW, Wang Z. Box-copper catalyzed asymmetric inverse-electron-demand oxa-hetero-Diels–Alder reaction for efficient synthesis of spiro pyranyl-oxindole derivatives. Org Chem Front 2021. [DOI: 10.1039/d0qo01407a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A chiral Box/Cu catalyzed asymmetric IEDDA reaction between isatin-derived β,γ-unsaturated α-ketoesters and electron-rich olefins was developed, which provided chiral spiro oxindole-pyrans in excellent yields with excellent stereoselectivities.
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Affiliation(s)
- Nai-Kai Li
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science Soochow University
- Suzhou 215123
- China
| | - Bing-Bing Sun
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science Soochow University
- Suzhou 215123
- China
| | - Jun-Bo Chen
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science Soochow University
- Suzhou 215123
- China
| | - Hao-Di Yang
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science Soochow University
- Suzhou 215123
- China
| | - Bai-Lin Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science Soochow University
- Suzhou 215123
- China
| | - Jie-Qiang Yu
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science Soochow University
- Suzhou 215123
- China
| | - Xing-Wang Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science Soochow University
- Suzhou 215123
- China
| | - Zheng Wang
- State Key Laboratory of Organometallic Chemistry
- Center for Excellence in Molecular Synthesis
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
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2
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Bhavani S, Ashfaq MA, Rambabu D, Basaveswara Rao M, Pal M. Ultrasound assisted Mizoroki–Heck reaction catalyzed by Pd/C: Synthesis of 3-vinyl indoles as potential cytotoxic agents. ARAB J CHEM 2019. [DOI: 10.1016/j.arabjc.2016.02.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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3
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Jiang X, Yang L, Yang W, Zhu Y, Fang L, Yu C. Controllable synthesis of 3-chloro- and 3,3-dichloro-2-oxindoles via hypervalent iodine-mediated chlorooxidation. Org Biomol Chem 2019; 17:6920-6924. [PMID: 31282524 DOI: 10.1039/c9ob01173k] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
An efficient and controllable protocol for the synthesis of 3-chloro- and 3,3-dichloro-2-oxindoles has been developed via hypervalent iodine-promoted chlorooxidation. By using two equivalents of 1-chloro-1,2-benziodoxol-3-(1H)-one, a wide range of indoles were transformed into 3-chloro-2-oxindoles in DMF/CF3CO2H/H2O at room temperature with good yields. As far as we know, this is the first report on the selective C-2 oxidation and C-3 monochlorination of simple indoles. In addition, three equivalents of the same hypervalent iodine afforded 3,3-dichloro-2-oxindoles in up to 99% yields under optimized conditions (dioxane/H2O, 80 °C). The method features mild reaction conditions, the widespread availability of the substrates, and good functional group tolerance.
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Affiliation(s)
- Xinpeng Jiang
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, P.R. China.
| | - Liechao Yang
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, P.R. China.
| | - Wenlong Yang
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, P.R. China.
| | - Yu Zhu
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, P.R. China.
| | - Liyun Fang
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, P.R. China.
| | - Chuanming Yu
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, P.R. China.
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4
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Liu H, Chen L, Yuan K, Jia Y. A Ten‐Step Total Synthesis of Speradine C. Angew Chem Int Ed Engl 2019; 58:6362-6365. [DOI: 10.1002/anie.201902004] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 03/10/2019] [Indexed: 12/17/2022]
Affiliation(s)
- Haichao Liu
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Lijun Chen
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Kuo Yuan
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Yanxing Jia
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
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5
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Affiliation(s)
- Haichao Liu
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Lijun Chen
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Kuo Yuan
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
| | - Yanxing Jia
- State Key Laboratory of Natural and Biomimetic DrugsSchool of Pharmaceutical SciencesPeking University Xue Yuan Rd. 38 Beijing 100191 China
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6
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Richy N, Sarraf D, Maréchal X, Janmamode N, Le Guével R, Genin E, Reboud-Ravaux M, Vidal J. Structure-based design of human immuno- and constitutive proteasomes inhibitors. Eur J Med Chem 2018; 145:570-587. [PMID: 29339252 DOI: 10.1016/j.ejmech.2018.01.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 01/04/2018] [Accepted: 01/04/2018] [Indexed: 12/20/2022]
Abstract
Starting from the X-ray structure of our previous tripeptidic linear mimics of TMC-95A in complex with yeast 20S proteasome, we introduced new structural features to induce a differential inhibition between human constitutive and immunoproteasome 20S particles. Libraries of 24 tripeptidic and 6 dipeptidic derivatives were synthesized. The optimized preparation of 3-hydroxyoxindolyl alanine residues from tryptophan and their incorporation in peptides were described. Several potent inhibitors of human constitutive proteasome and immunoproteasome acting at the nanomolar level (IC50 = 7.1 nM against the chymotrypsin-like activity for the best inhibitor) were obtained. A cytotoxic effect at the submicromolar level was observed against 6 human cancer cell lines.
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Affiliation(s)
- Nicolas Richy
- Université Rennes 1, Institut des Sciences Chimiques de Rennes, CNRS UMR 6226, Bâtiment 10A, Campus de Beaulieu, 35042 Rennes, Cedex, France
| | - Daad Sarraf
- Université Rennes 1, Institut des Sciences Chimiques de Rennes, CNRS UMR 6226, Bâtiment 10A, Campus de Beaulieu, 35042 Rennes, Cedex, France
| | - Xavier Maréchal
- Sorbonne Universités, UPMC Univ Paris 06-CNRS, IBPS, UMR 8256, Inserm ERL1164, B2A, 7 Quai Saint Bernard, F75005 Paris, France
| | - Naëla Janmamode
- Université Rennes 1, Institut des Sciences Chimiques de Rennes, CNRS UMR 6226, Bâtiment 10A, Campus de Beaulieu, 35042 Rennes, Cedex, France
| | - Rémy Le Guével
- Université Rennes 1, Technology Platform ImPACcell, SFR UMS CNRS 3480, INSERM 018, Bâtiment 8, Campus de Villejean, 35043 Rennes, Cedex, France
| | - Emilie Genin
- Université Rennes 1, Institut des Sciences Chimiques de Rennes, CNRS UMR 6226, Bâtiment 10A, Campus de Beaulieu, 35042 Rennes, Cedex, France
| | - Michèle Reboud-Ravaux
- Sorbonne Universités, UPMC Univ Paris 06-CNRS, IBPS, UMR 8256, Inserm ERL1164, B2A, 7 Quai Saint Bernard, F75005 Paris, France.
| | - Joëlle Vidal
- Université Rennes 1, Institut des Sciences Chimiques de Rennes, CNRS UMR 6226, Bâtiment 10A, Campus de Beaulieu, 35042 Rennes, Cedex, France.
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7
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Li G, Huang L, Xu J, Sun W, Xie J, Hong L, Wang R. Sodium Iodide/Hydrogen Peroxide-Mediated Oxidation/Lactonization for the Construction of Spirocyclic Oxindole-Lactones. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600441] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Guofeng Li
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province; Lanzhou University; Lanzhou 730000 People's Republic of China
| | - Liwu Huang
- School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou 510006 People's Republic of China
| | - Jiecheng Xu
- School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou 510006 People's Republic of China
| | - Wangsheng Sun
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province; Lanzhou University; Lanzhou 730000 People's Republic of China
| | - Junqiu Xie
- School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou 510006 People's Republic of China
| | - Liang Hong
- School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou 510006 People's Republic of China
| | - Rui Wang
- School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou 510006 People's Republic of China
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province; Lanzhou University; Lanzhou 730000 People's Republic of China
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8
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Etukala JR, Zhu XY, Eyunni SVK, Onyameh EK, Ofori E, Bricker BA, Kang HJ, Huang XP, Roth BL, Ablordeppey SY. Development of CNS multi-receptor ligands: Modification of known D2 pharmacophores. Bioorg Med Chem 2016; 24:3671-9. [PMID: 27364609 DOI: 10.1016/j.bmc.2016.06.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2016] [Revised: 05/27/2016] [Accepted: 06/03/2016] [Indexed: 02/02/2023]
Abstract
Several known D2 pharmacophores have been explored as templates for identifying ligands with multiple binding affinities at dopamine and serotonin receptors considered as clinically relevant receptors in the treatment of neuropsychiatric diseases. This approach has resulted in the identification of ligands that target multiple CNS receptors while avoiding others associated with deleterious effects. In particular, compounds 11, 15 and 22 may have potential for further development as antipsychotic agents as they favorably interact with the clinically relevant receptors including D2R, 5-HT1AR, and 5-HT7R. We have also identified the pair of compounds 11 and 10 as high affinity D2R ligands with and without SERT binding affinities, respectively. These differential binding profiles endow the pair with the potential for evaluating SERT contributions to antipsychotic drug activity in animal behavioral models. In addition, compound 11 has no significant affinity for 5-HT2CR and binds only moderately to the H1R, suggesting it may not induce weight gain or sedation when used clinically. Taken together, compound 11 displays an interesting pharmacological profile that necessitates the evaluation of its functional and in vivo effects in animal models which are currently ongoing.
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Affiliation(s)
- Jagan R Etukala
- Division of Basic Pharmaceutical Sciences, Florida A&M University, College of Pharmacy and Pharmaceutical Sciences, Tallahassee, FL 32307, USA
| | - Xue Y Zhu
- Division of Basic Pharmaceutical Sciences, Florida A&M University, College of Pharmacy and Pharmaceutical Sciences, Tallahassee, FL 32307, USA
| | - Suresh V K Eyunni
- Division of Basic Pharmaceutical Sciences, Florida A&M University, College of Pharmacy and Pharmaceutical Sciences, Tallahassee, FL 32307, USA
| | - Edem K Onyameh
- Division of Basic Pharmaceutical Sciences, Florida A&M University, College of Pharmacy and Pharmaceutical Sciences, Tallahassee, FL 32307, USA
| | - Edward Ofori
- Division of Basic Pharmaceutical Sciences, Florida A&M University, College of Pharmacy and Pharmaceutical Sciences, Tallahassee, FL 32307, USA
| | - Barbara A Bricker
- Division of Basic Pharmaceutical Sciences, Florida A&M University, College of Pharmacy and Pharmaceutical Sciences, Tallahassee, FL 32307, USA
| | - Hye J Kang
- Department of Pharmacology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7365, USA; National Institute of Mental Health Psychoactive Drug Screening Program (NIMH PDSP), School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7365, USA
| | - Xi-Ping Huang
- Department of Pharmacology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7365, USA; National Institute of Mental Health Psychoactive Drug Screening Program (NIMH PDSP), School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7365, USA
| | - Bryan L Roth
- Department of Pharmacology, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7365, USA; National Institute of Mental Health Psychoactive Drug Screening Program (NIMH PDSP), School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7365, USA; Division of Chemical Biology and Medicinal Chemistry, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7360, USA
| | - Seth Y Ablordeppey
- Division of Basic Pharmaceutical Sciences, Florida A&M University, College of Pharmacy and Pharmaceutical Sciences, Tallahassee, FL 32307, USA.
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9
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Wang S, Huang X, Wen Y, Ge Z, Wang X, Li R. Cascade synthesis of spirooxindole δ-lactone derivatives through N-aryl hydroxymethylacrylamides with xanthates. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.08.039] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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10
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11
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Arulananda Babu S, Padmavathi R, Ahmad Aslam N, Rajkumar V. Recent Developments on the Synthesis and Applications of Natural Products-Inspired Spirooxindole Frameworks. STUDIES IN NATURAL PRODUCTS CHEMISTRY 2015. [DOI: 10.1016/b978-0-444-63462-7.00008-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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12
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13
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Liu R, Yu C, Xiao Z, Li T, Wang X, Xie Y, Yao C. NHC-catalyzed oxidative γ-addition of α,β-unsaturated aldehydes to isatins: a high-efficiency synthesis of spirocyclic oxindole-dihydropyranones. Org Biomol Chem 2014; 12:1885-91. [DOI: 10.1039/c3ob42008f] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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14
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Zhu B, Zhang W, Lee R, Han Z, Yang W, Tan D, Huang KW, Jiang Z. Direct Asymmetric Vinylogous Aldol Reaction of Allyl Ketones with Isatins: Divergent Synthesis of 3-Hydroxy-2-Oxindole Derivatives. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201302274] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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15
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Zhu B, Zhang W, Lee R, Han Z, Yang W, Tan D, Huang KW, Jiang Z. Direct Asymmetric Vinylogous Aldol Reaction of Allyl Ketones with Isatins: Divergent Synthesis of 3-Hydroxy-2-Oxindole Derivatives. Angew Chem Int Ed Engl 2013; 52:6666-70. [DOI: 10.1002/anie.201302274] [Citation(s) in RCA: 150] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Indexed: 11/09/2022]
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16
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Du D, Hu Z, Jin J, Lu Y, Tang W, Wang B, Lu T. N-Heterocyclic Carbene-Catalyzed Three-Component Domino Reaction of Alkynyl Aldehydes with Oxindoles. Org Lett 2012; 14:1274-7. [DOI: 10.1021/ol300148f] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ding Du
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry, China Pharmaceutical University, Nanjing, 210009, P. R. China
| | - Zhongyuan Hu
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry, China Pharmaceutical University, Nanjing, 210009, P. R. China
| | - Jianlin Jin
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry, China Pharmaceutical University, Nanjing, 210009, P. R. China
| | - Yingyan Lu
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry, China Pharmaceutical University, Nanjing, 210009, P. R. China
| | - Weifang Tang
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry, China Pharmaceutical University, Nanjing, 210009, P. R. China
| | - Bo Wang
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry, China Pharmaceutical University, Nanjing, 210009, P. R. China
| | - Tao Lu
- State Key Laboratory of Natural Medicines, Department of Organic Chemistry, China Pharmaceutical University, Nanjing, 210009, P. R. China
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Wang L, Li Z, Lu L, Zhang W. Synthesis of spiro[furan-3,3′-indolin]-2′-ones by PET-catalyzed [3+2] reactions of spiro[indoline-3,2′-oxiran]-2-ones with electron-rich olefins. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.12.018] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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18
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Wu CY, Hu M, Liu Y, Song RJ, Lei Y, Tang BX, Li RJ, Li JH. Ruthenium-catalyzed annulation of alkynes with amides via formyl translocation. Chem Commun (Camb) 2012; 48:3197-9. [DOI: 10.1039/c2cc17887g] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Yeo SJ, Liu Y, Wang X. A one-pot three-component reaction for the preparation of highly functionalized tryptamines. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.11.032] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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20
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Yin BL, Lai JQ, Zhang ZR, Jiang HF. A Novel Entry to Spirofurooxindoles Involving Tandem Dearomatization of Furan Ring and Intramolecular Friedel- Crafts Reaction. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201100034] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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21
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Liu P, Chen W, Ren K, Wang L. Highly Efficient InBr3 Catalyzed Michael Addition of Indoles to α,β-Unsaturated Esters. CHINESE J CHEM 2011. [DOI: 10.1002/cjoc.201190011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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22
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Wang X, Zhang Y, Ye S. Enantioselective Synthesis of Spirocyclic Oxindole‐β‐lactones
via
N‐Heterocyclic Carbene‐Catalyzed Cycloaddition of Ketenes and Isatins. Adv Synth Catal 2010. [DOI: 10.1002/adsc.201000187] [Citation(s) in RCA: 116] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xiao‐Na Wang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China, Fax: (+86)‐10‐6255‐4449
| | - Yan‐Yong Zhang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China, Fax: (+86)‐10‐6255‐4449
| | - Song Ye
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China, Fax: (+86)‐10‐6255‐4449
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Ortín I, González JF, de la Cuesta E, Avendaño C. C(3)-alkylation and cyclization of pyrazino[1,2-b]isoquinolin-4-ones. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.10.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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