1
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Kaieda Y, Yamamoto K, Kuriyama M, Onomura O. Rhodium‐Catalyzed Transannulation of <i>N</i>‐Sulfonyl‐1,2,3‐triazoles with Carboxylic Esters. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200544] [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]
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2
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Akter M, Rupa K, Anbarasan P. 1,2,3-Triazole and Its Analogues: New Surrogates for Diazo Compounds. Chem Rev 2022; 122:13108-13205. [DOI: 10.1021/acs.chemrev.1c00991] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Monalisa Akter
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India
| | - Kavuri Rupa
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India
| | - Pazhamalai Anbarasan
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India
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3
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Zhao H, Luo Z, Yang J, Li B, Han J, Xu L, Lai W, Walsh PJ. Ligand‐Promoted Rh
I
‐Catalyzed C2‐Selective C−H Alkenylation and Polyenylation of Imidazoles with Alkenyl Carboxylic Acids. Chemistry 2022; 28:e202200441. [DOI: 10.1002/chem.202200441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Indexed: 11/08/2022]
Affiliation(s)
- Haoqiang Zhao
- Department of Chemistry Renmin University of China Beijing 100872 P. R. China
- Roy and Diana Vagelos Laboratories Penn/Merck Laboratory for High-Throughput Experimentation Department of Chemistry University of Pennsylvania 231 South 34th Street Philadelphia PA 19104-6323 USA
- Department of Chemistry School of Chinese Pharmacy Beijing University of Chinese Medicine Beijing 102488 P. R. China
| | - Zhenli Luo
- Department of Chemistry Renmin University of China Beijing 100872 P. R. China
| | - Ji Yang
- Department of Chemistry Renmin University of China Beijing 100872 P. R. China
| | - Bohan Li
- Department of Chemistry Renmin University of China Beijing 100872 P. R. China
| | - Jiahong Han
- Department of Chemistry Renmin University of China Beijing 100872 P. R. China
| | - Lijin Xu
- Department of Chemistry Renmin University of China Beijing 100872 P. R. China
| | - Wenzhen Lai
- Department of Chemistry Renmin University of China Beijing 100872 P. R. China
| | - Patrick J. Walsh
- Roy and Diana Vagelos Laboratories Penn/Merck Laboratory for High-Throughput Experimentation Department of Chemistry University of Pennsylvania 231 South 34th Street Philadelphia PA 19104-6323 USA
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4
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Saito A. Metal-Free Synthesis of Heterocycles via Activation of Alkynes by Hypervalent Iodine. J SYN ORG CHEM JPN 2021. [DOI: 10.5059/yukigoseikyokaishi.79.766] [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)
- Akio Saito
- Department of Applied Chemistry, Tokyo University of Agriculture and Technology
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5
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Bahadorikhalili S, Divar M, Damghani T, Moeini F, Ghassamipour S, Iraji A, Miller MA, Larijani B, Mahdavi M. N-sulfonyl ketenimine as a versatile intermediate for the synthesis of heteroatom containing compounds. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.121773] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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6
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Kahar N, Jadhav P, Reddy RVR, Dawande S. A rhodium(ii) catalysed domino synthesis of azepino fused diindoles from isatin tethered N-sulfonyl-1,2,3-triazoles and indoles. Chem Commun (Camb) 2020; 56:1207-1210. [PMID: 31895362 DOI: 10.1039/c9cc08377d] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
An efficient and convenient protocol for the synthesis of a novel class of azepino fused diindoles from isatin tethered N-sulfonyl-1,2,3-triazoles and indoles has been disclosed. The reaction proceeds via denitrogenative aza-vinyl rhodium carbene formation to give a carbonyl ylide, which with indole results in 1,3-dipolar cycloaddition followed by sequential semipinacol rearrangement/ring expansion/oxidation to produce azepino fused diindoles. The reaction shows a broad substrate scope giving up to 81% yield. Furthermore, reversible catalytic hydrogenation and photophysical studies were carried out to demonstrate the application of these molecules.
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Affiliation(s)
- Nilesh Kahar
- Department of Chemistry, Institute of Chemical Technology, Mumbai, Maharashtra 400019, India.
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7
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Nipate AS, Jadhav CK, Chate AV, Taur KS, Gill CH. β‐Cyclodextrin catalyzed access to fused 1,8‐dihydroimidazo[2,3‐
b
]indoles via one‐pot multicomponent cascade in aqueous ethanol: Supramolecular approach toward sustainability. J Heterocycl Chem 2019. [DOI: 10.1002/jhet.3828] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Amol S. Nipate
- Department of ChemistryDr. Babasaheb Ambedkar Marathwada University Aurangabad India
| | - Chetan K. Jadhav
- Department of ChemistryDr. Babasaheb Ambedkar Marathwada University Aurangabad India
| | - Asha V. Chate
- Department of ChemistryDr. Babasaheb Ambedkar Marathwada University Aurangabad India
| | - Kanchan S. Taur
- Department of ChemistryDr. Babasaheb Ambedkar Marathwada University Aurangabad India
| | - Charansingh H. Gill
- Department of ChemistryDr. Babasaheb Ambedkar Marathwada University Aurangabad India
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8
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Yamamoto T, Togo H. One-Pot Preparation of Aromatic Amides, 4-Arylthiazoles, and 4-Arylimidazoles from Arenes. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800730] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Takahiro Yamamoto
- Graduate School of Science; Chiba University; Yayoi-cho 1-33 263-8522 Inage-ku Chiba Japan
| | - Hideo Togo
- Graduate School of Science; Chiba University; Yayoi-cho 1-33 263-8522 Inage-ku Chiba Japan
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9
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Baek Y, Maeng C, Kim H, Lee PH. Regioselective Synthesis of Indolopyrazines through a Sequential Rhodium-Catalyzed Formal [3+3] Cycloaddition and Aromatization Reaction of Diazoindolinimines with Azirines. J Org Chem 2018; 83:2349-2360. [DOI: 10.1021/acs.joc.8b00115] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Yonghyeon Baek
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Chanyoung Maeng
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Hyunseok Kim
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Phil Ho Lee
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
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10
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Zhao H, Xu J, Chen C, Xu X, Pan Y, Zhang Z, Li H, Xu L. Rhodium(III)-Catalyzed Selective Direct Olefination of Imidazoles. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701515] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Haoqiang Zhao
- Department of Chemistry; Renmin University of China; Beijing 100872 People's Republic of China
| | - Jianbin Xu
- Department of Chemistry; Renmin University of China; Beijing 100872 People's Republic of China
| | - Changjun Chen
- Department of Chemistry; Renmin University of China; Beijing 100872 People's Republic of China
| | - Xin Xu
- Department of Chemistry; Renmin University of China; Beijing 100872 People's Republic of China
| | - Yixiao Pan
- Department of Chemistry; Renmin University of China; Beijing 100872 People's Republic of China
| | - Zongyao Zhang
- Department of Chemistry; Renmin University of China; Beijing 100872 People's Republic of China
| | - Huanrong Li
- Department of Chemistry; Renmin University of China; Beijing 100872 People's Republic of China
| | - Lijin Xu
- Department of Chemistry; Renmin University of China; Beijing 100872 People's Republic of China
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11
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Synthesis of 3a,7a-Dihydroindoles via Rhodium-catalyzed Intermolecular Formal [3 + 2] Transannulation Reactions of Triazoles with Alkyl-substituted Benzene Derivatives. B KOREAN CHEM SOC 2017. [DOI: 10.1002/bkcs.11283] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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12
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Zhang R, Li Y, Ali A, Hao J, Bi X, Fu J. Rh(II)-Catalyzed Tandem Cyclization of Aliphatic N
-Sulfonyl-1,2,3-triazoles and Alcohols for the Synthesis of 6-Alkoxy Piperidin-3-ones. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700882] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ran Zhang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis; Department of Chemistry; Northeast Normal University; Changchun 130024 People's Repulic of China
| | - Yang Li
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis; Department of Chemistry; Northeast Normal University; Changchun 130024 People's Repulic of China
| | - Arshad Ali
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis; Department of Chemistry; Northeast Normal University; Changchun 130024 People's Repulic of China
| | - Jiamin Hao
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis; Department of Chemistry; Northeast Normal University; Changchun 130024 People's Repulic of China
| | - Xihe Bi
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis; Department of Chemistry; Northeast Normal University; Changchun 130024 People's Repulic of China
- State Key Laboratory of Elemento-Organic Chemistry; Nankai University; Tianjin 300071 China
| | - Junkai Fu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis; Department of Chemistry; Northeast Normal University; Changchun 130024 People's Repulic of China
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13
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Kim S, Kim H, Um K, Lee PH. Synthesis of Azepinoindoles via Rhodium-Catalyzed Formal Aza-[4 + 3] Cycloaddition Reaction of 3-Diazoindolin-2-imines with 1,3-Dienes in One-Pot. J Org Chem 2017; 82:9808-9815. [DOI: 10.1021/acs.joc.7b01150] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Sanghyuck Kim
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Hyunseok Kim
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Kyusik Um
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Phil Ho Lee
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
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14
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Yang H, Hou S, Tao C, Liu Z, Wang C, Cheng B, Li Y, Zhai H. Rhodium-Catalyzed Denitrogenative [3+2] Cycloaddition: Access to Functionalized Hydroindolones and the Framework of Montanine-TypeAmaryllidaceaeAlkaloids. Chemistry 2017; 23:12930-12936. [DOI: 10.1002/chem.201702893] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Indexed: 01/25/2023]
Affiliation(s)
- Hongjian Yang
- The State Key Laboratory of Applied Organic Chemistry; College of Chemistry and Chemical Engineering; Lanzhou University; 730000 P. R. China
| | - Shengtai Hou
- The State Key Laboratory of Applied Organic Chemistry; College of Chemistry and Chemical Engineering; Lanzhou University; 730000 P. R. China
| | - Cheng Tao
- The State Key Laboratory of Applied Organic Chemistry; College of Chemistry and Chemical Engineering; Lanzhou University; 730000 P. R. China
| | - Zhao Liu
- The State Key Laboratory of Applied Organic Chemistry; College of Chemistry and Chemical Engineering; Lanzhou University; 730000 P. R. China
| | - Chao Wang
- The State Key Laboratory of Applied Organic Chemistry; College of Chemistry and Chemical Engineering; Lanzhou University; 730000 P. R. China
| | - Bin Cheng
- The State Key Laboratory of Applied Organic Chemistry; College of Chemistry and Chemical Engineering; Lanzhou University; 730000 P. R. China
| | - Yun Li
- The State Key Laboratory of Applied Organic Chemistry; College of Chemistry and Chemical Engineering; Lanzhou University; 730000 P. R. China
| | - Hongbin Zhai
- The State Key Laboratory of Applied Organic Chemistry; College of Chemistry and Chemical Engineering; Lanzhou University; 730000 P. R. China
- Laboratory of Chemical Genomics; School of Chemical Biology and Biotechnology; Shenzhen Graduate School of Peking University; 518055 P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); 300071 P. R. China
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15
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Guarnieri-Ibáñez A, Medina F, Besnard C, Kidd SL, Spring DR, Lacour J. Diversity-oriented synthesis of heterocycles and macrocycles by controlled reactions of oxetanes with α-iminocarbenes. Chem Sci 2017; 8:5713-5720. [PMID: 28989611 PMCID: PMC5621157 DOI: 10.1039/c7sc00964j] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Accepted: 06/05/2017] [Indexed: 12/30/2022] Open
Abstract
Using N-sulfonyl triazoles as substrates, compounds as diverse as 2-imino tetrahydrofurans, 13- and 15-membered ring aza-macrocycles can be prepared selectively via formal [1 + 4], [5 + 4 + 4] and [3 + 4 + 4 + 4] condensations of α-imino carbenes and oxetanes under Rh(ii)-catalysis or thermal activation. Spirocyclic N-heterocycles are also accessible by means of Buchwald-Hartwig and Pictet-Spengler cyclizations. By reaction control, substrate selection or further derivatization, a large variety of chemical structures is thus achievable. Finally, using triazoles reacting under thermal activation, interesting mechanistic insight was obtained.
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Affiliation(s)
- Alejandro Guarnieri-Ibáñez
- Department of Organic Chemistry , University of Geneva , quai Ernest Ansermet 30 , CH-1211 Geneva 4 , Switzerland
| | - Florian Medina
- Department of Organic Chemistry , University of Geneva , quai Ernest Ansermet 30 , CH-1211 Geneva 4 , Switzerland
| | - Céline Besnard
- Laboratory of Crystallography , University of Geneva , quai Ernest Ansermet 24 , CH-1211 Geneva 4 , Switzerland
| | - Sarah L Kidd
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge , CB2 1EW , UK
| | - David R Spring
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge , CB2 1EW , UK
| | - Jérôme Lacour
- Department of Organic Chemistry , University of Geneva , quai Ernest Ansermet 30 , CH-1211 Geneva 4 , Switzerland
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16
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Li Y, Zhang R, Ali A, Zhang J, Bi X, Fu J. Synthesis of 6-Substituted Piperidin-3-ones via Rh(II)-Catalyzed Transannulation of N-Sulfonyl-1,2,3-triazoles with Electron-Rich Aromatic Nucleophiles. Org Lett 2017; 19:3087-3090. [PMID: 28541705 DOI: 10.1021/acs.orglett.7b01180] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A highly diastereoselective rhodium(II)-catalyzed transannulation of aldehyde-tethered N-sulfonyl triazoles with electron-rich aromatic nucleophiles is reported for the first time to afford functionalized 6-substituted piperidin-3-ones. The reaction has a broad substrate scope including both aliphatic and aromatic N-sulfonyl-1,2,3-triazoles together with various aromatic nucleophiles. The addition of a catalytic amount of Lewis acid has proven to be crucial for the yield improvement. By employing this methodology, hardly accessible piperidin-3-ones bearing quaternary carbons could be obtained.
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Affiliation(s)
- Yang Li
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University , Changchun 130024, China
| | - Ran Zhang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University , Changchun 130024, China
| | - Arshad Ali
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University , Changchun 130024, China
| | - Jing Zhang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University , Changchun 130024, China
| | - Xihe Bi
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University , Changchun 130024, China.,State Key Laboratory of Elemento-Organic Chemistry, Nankai University , Tianjin 300071, China
| | - Junkai Fu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University , Changchun 130024, China
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17
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Wang Y, Wu Y, Li Y, Tang Y. Denitrogenative Suzuki and carbonylative Suzuki coupling reactions of benzotriazoles with boronic acids. Chem Sci 2017; 8:3852-3857. [PMID: 28966777 PMCID: PMC5578364 DOI: 10.1039/c7sc00367f] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Accepted: 03/10/2017] [Indexed: 11/21/2022] Open
Abstract
Unprecedented palladium-catalyzed denitrogenative Suzuki and carbonylative Suzuki coupling reactions of benzotriazoles with boronic acids have been realized, which afforded structurally diverse ortho-amino-substituted biaryl and biaryl ketone derivatives. The key to this success is due to the development of a rationally designed strategy to achieve the ring opening of benzotriazoles with a synergistic activating-stabilizing effect, which enables the in situ generation of the corresponding ortho-amino-arenediazonium species. The present work opens up a new avenue to utilize benzotriazoles as synthetic equivalents of ortho-amino-arenediazoniums, which otherwise could not be directly accessed by existing synthetic methods.
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Affiliation(s)
- Yuanhao Wang
- School of Pharmaceutical Sciences , Tsinghua University , Beijing 100084 , China .
| | - Yunfei Wu
- Collaborative Innovation Center for Biotherapy , State Key Laboratory of Biotherapy and Cancer Center , West China Medical School , Sichuan University , Chengdu 610041 , China
| | - Yuanhe Li
- School of Pharmaceutical Sciences , Tsinghua University , Beijing 100084 , China .
| | - Yefeng Tang
- School of Pharmaceutical Sciences , Tsinghua University , Beijing 100084 , China .
- Collaborative Innovation Center for Biotherapy , State Key Laboratory of Biotherapy and Cancer Center , West China Medical School , Sichuan University , Chengdu 610041 , China
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18
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Shojaei S, Ghasemi Z, Shahrisa A. Cu(I)@Fe
3
O
4
nanoparticles supported on imidazolium‐based ionic liquid‐grafted cellulose: Green and efficient nanocatalyst for multicomponent synthesis of
N
‐sulfonylamidines and
N
‐sulfonylacrylamidines. Appl Organomet Chem 2017. [DOI: 10.1002/aoc.3788] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Salman Shojaei
- Department of Organic and Biochemistry, Faculty of ChemistryUniversity of Tabriz Tabriz 5166614766 Iran
| | - Zarrin Ghasemi
- Department of Organic and Biochemistry, Faculty of ChemistryUniversity of Tabriz Tabriz 5166614766 Iran
| | - Aziz Shahrisa
- Department of Organic and Biochemistry, Faculty of ChemistryUniversity of Tabriz Tabriz 5166614766 Iran
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19
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Bennett JM, Shapiro JD, Choinski KN, Mei Y, Aulita SM, Reinheimer EW, Majireck MM. Synthesis of phthalan and phenethylamine derivatives via addition of alcohols to rhodium(II)-azavinyl carbenoids. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.01.105] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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20
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Kim JE, Lee J, Yun H, Baek Y, Lee PH. Rhodium-Catalyzed Intramolecular Transannulation Reaction of Alkynyl Thiadiazole Enabled 5,n-Fused Thiophenes. J Org Chem 2017; 82:1437-1447. [PMID: 28074654 DOI: 10.1021/acs.joc.6b02614] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A method for the synthesis of a wide range of fused thiophenes, including those fused with lactams, lactones, or cyclic ethers, was developed from a rhodium-catalyzed intramolecular transannulation reaction of alkynyl thiadiazoles. This transannulation reaction provides an efficient platform for the construction of a variety of 5,n-fused thiophenes from readily available starting materials together with the release of molecular nitrogen.
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Affiliation(s)
- Ji Eun Kim
- National Creative Research Initiative Center for Catalytic Organic Reactions, Department of Chemistry, Kangwon National University , Chuncheon 24341, Republic of Korea
| | - Jinsub Lee
- National Creative Research Initiative Center for Catalytic Organic Reactions, Department of Chemistry, Kangwon National University , Chuncheon 24341, Republic of Korea
| | - Hyunsik Yun
- National Creative Research Initiative Center for Catalytic Organic Reactions, Department of Chemistry, Kangwon National University , Chuncheon 24341, Republic of Korea
| | - Yonghyeon Baek
- National Creative Research Initiative Center for Catalytic Organic Reactions, Department of Chemistry, Kangwon National University , Chuncheon 24341, Republic of Korea
| | - Phil Ho Lee
- National Creative Research Initiative Center for Catalytic Organic Reactions, Department of Chemistry, Kangwon National University , Chuncheon 24341, Republic of Korea
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21
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The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2015. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2016.08.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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22
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Sun R, Jiang Y, Tang XY, Shi M. RhII-Catalyzed Cyclization of Ester/Thioester-ContainingN-Sulfonyl-1,2,3-triazoles: Facile Synthesis of Alkylidenephthalans and Alkylidenethiophthalans. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201600466] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Run Sun
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; School of Chemistry and Molecular Engineering; East China University of Science and Technology; Meilong Road No. 130 Shanghai 200237 China
| | - Yu Jiang
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; School of Chemistry and Molecular Engineering; East China University of Science and Technology; Meilong Road No. 130 Shanghai 200237 China
| | - Xiang-Ying Tang
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Min Shi
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; School of Chemistry and Molecular Engineering; East China University of Science and Technology; Meilong Road No. 130 Shanghai 200237 China
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
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23
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Shin S, Son JY, Choi C, Kim S, Lee PH. Synthesis of Benzofulvenes through Rhodium-Catalyzed Transannulation of Enynyl Triazoles. J Org Chem 2016; 81:11706-11715. [DOI: 10.1021/acs.joc.6b02140] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Seohyun Shin
- National Creative Research
Initiative Center for Catalytic Organic Reactions, Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Jeong-Yu Son
- National Creative Research
Initiative Center for Catalytic Organic Reactions, Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Changwook Choi
- National Creative Research
Initiative Center for Catalytic Organic Reactions, Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Sanghyuck Kim
- National Creative Research
Initiative Center for Catalytic Organic Reactions, Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Phil Ho Lee
- National Creative Research
Initiative Center for Catalytic Organic Reactions, Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
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24
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Zhang Z, Yang S, Li J, Liao X. DFT Mechanistic Study of Rh(III)-Catalyzed [3 + 2]/[5 + 2] Annulation of 4-Aryl-1,2,3-triazoles and Alkynes Unveils the Dual C–H Activation Strategy. J Org Chem 2016; 81:9639-9646. [PMID: 27690441 DOI: 10.1021/acs.joc.6b01706] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhongchao Zhang
- Department of Chemistry, Jinan University, Huangpu Road West 601, Guangzhou, Guangdong 510632, P. R. China
| | - Shengwen Yang
- Department of Chemistry, Jinan University, Huangpu Road West 601, Guangzhou, Guangdong 510632, P. R. China
| | - Juan Li
- Department of Chemistry, Jinan University, Huangpu Road West 601, Guangzhou, Guangdong 510632, P. R. China
| | - Xiaojian Liao
- Department of Chemistry, Jinan University, Huangpu Road West 601, Guangzhou, Guangdong 510632, P. R. China
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25
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Zhang L, Sun G, Bi X. Rhodium/Silver-Cocatalyzed Transannulation of N-Sulfonyl-1,2,3-triazoles with Vinyl Azides: Divergent Synthesis of Pyrroles and 2 H-Pyrazines. Chem Asian J 2016; 11:3018-3021. [PMID: 27643511 DOI: 10.1002/asia.201601164] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Indexed: 11/05/2022]
Abstract
The first cyclization reaction between vinyl azides and N-sulfonyl-1,2,3-triazoles is reported. A Rh/Ag binary metal catalyst system proved to be necessary for the successful cyclization. By varying the structure of vinyl azides, such reaction allows the divergent synthesis of pyrroles and 2H-pyrazines. The cyclization reactions feature a broad substrate scope, good functional group tolerance, high reaction efficiency, and good to high product yields.
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Affiliation(s)
- Lin Zhang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Renmin Str. 5268#, Changchun, 130024, China
| | - Ge Sun
- College of Pharmacy, Qiqihar Medical University, 333 Bukui Street, 161006, Qiqihar, China
| | - Xihe Bi
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Department of Chemistry, Northeast Normal University, Renmin Str. 5268#, Changchun, 130024, China.,State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, China
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26
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Son JY, Kim J, Han SH, Kim SH, Lee PH. Regioselective Synthesis of Dihydrothiophenes and Thiophenes via the Rhodium-Catalyzed Transannulation of 1,2,3-Thiadiazoles with Alkenes. Org Lett 2016; 18:5408-5411. [DOI: 10.1021/acs.orglett.6b02805] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jeong-Yu Son
- Department
of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Jonghye Kim
- Department
of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Sang Hoon Han
- Department
of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Sung Hong Kim
- Analysis
Research Division Daegu Center, Korea Basic Science Institute, Daegu 41566, Republic of Korea
| | - Phil Ho Lee
- Department
of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
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27
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Choi H, Kim J, Lee K. Metal-free, Brønsted acid-mediated synthesis of coumarin derivatives from phenols and propiolic acids. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.06.039] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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28
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Jeon WH, Son JY, Kim JE, Lee PH. Synthesis of 1,2-Benzothiazines by a Rhodium-Catalyzed Domino C–H Activation/Cyclization/Elimination Process from S-Aryl Sulfoximines and Pyridotriazoles. Org Lett 2016; 18:3498-501. [DOI: 10.1021/acs.orglett.6b01750] [Citation(s) in RCA: 86] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Woo Hyung Jeon
- National Creative Research
Initiative Center for Catalytic Organic Reactions, Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Jeong-Yu Son
- National Creative Research
Initiative Center for Catalytic Organic Reactions, Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Ji Eun Kim
- National Creative Research
Initiative Center for Catalytic Organic Reactions, Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Phil Ho Lee
- National Creative Research
Initiative Center for Catalytic Organic Reactions, Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
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29
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Yadagiri D, Reddy ACS, Anbarasan P. Rhodium catalyzed diastereoselective synthesis of 2,2,3,3-tetrasubstituted indolines from N-sulfonyl-1,2,3-triazoles and ortho-vinylanilines. Chem Sci 2016; 7:5934-5938. [PMID: 30034735 PMCID: PMC6024588 DOI: 10.1039/c6sc01075j] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Accepted: 05/19/2016] [Indexed: 12/05/2022] Open
Abstract
An efficient diastereoselective rhodium catalyzed synthesis of indolines possessing two contiguous tetrasubstituted carbon centers has been achieved with good to excellent yields using ortho-vinylanilines and iminocarbenes derived from N-sulfonyl-1,2,3-triazoles.
An efficient diastereoselective rhodium catalyzed synthesis of indolines possessing two contiguous tetrasubstituted carbon centers has been achieved with good to excellent yields using ortho-vinylanilines and iminocarbenes derived from N-sulfonyl-1,2,3-triazoles. The reaction affords excellent cis-diastereoselectivity through the initial formation of a N-ylide followed by intramolecular trapping with unactivated alkenes via an ene-type reaction with a well-organized transition state, namely intramolecular carbenylative amination of alkenes. The developed transformation was further extended to the successful synthesis of tricyclic compounds, imidazoindolines, through reduction and hypervalent iodine mediated oxidative cyclization.
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Affiliation(s)
- Dongari Yadagiri
- Department of Chemistry , Indian Institute of Technology Madras , Chennai 600036 , India . ; http://chem.iitm.ac.in/faculty/anbarasan/profanbu/
| | - Angula Chandra Shekar Reddy
- Department of Chemistry , Indian Institute of Technology Madras , Chennai 600036 , India . ; http://chem.iitm.ac.in/faculty/anbarasan/profanbu/
| | - Pazhamalai Anbarasan
- Department of Chemistry , Indian Institute of Technology Madras , Chennai 600036 , India . ; http://chem.iitm.ac.in/faculty/anbarasan/profanbu/
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30
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Yong WS, Park S, Yun H, Lee PH. Synthesis of 2H-IndazolesviaTandem Palladium-Catalyzed Deacylative Cross-Coupling and Denitrogenative Cyclization of 2-Iodoazoarenes and 2-Iodoaryltriazenes with Acyldiazoacetates in One-Pot. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600351] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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31
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Chow SY, Stevens MY, Odell LR. Sulfonyl Azides as Precursors in Ligand-Free Palladium-Catalyzed Synthesis of Sulfonyl Carbamates and Sulfonyl Ureas and Synthesis of Sulfonamides. J Org Chem 2016; 81:2681-91. [DOI: 10.1021/acs.joc.5b02755] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Shiao Y. Chow
- Organic
Pharmaceutical Chemistry,
Department of Medicinal Chemistry, Uppsala Biomedical Center, Uppsala University, P.O.
Box 574, SE-751 23 Uppsala, Sweden
| | - Marc Y. Stevens
- Organic
Pharmaceutical Chemistry,
Department of Medicinal Chemistry, Uppsala Biomedical Center, Uppsala University, P.O.
Box 574, SE-751 23 Uppsala, Sweden
| | - Luke R. Odell
- Organic
Pharmaceutical Chemistry,
Department of Medicinal Chemistry, Uppsala Biomedical Center, Uppsala University, P.O.
Box 574, SE-751 23 Uppsala, Sweden
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32
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Sun R, Jiang Y, Tang XY, Shi M. Rhodium(II)-Catalyzed and Thermally Induced Intramolecular Migration ofN-Sulfonyl-1,2,3-triazoles: New Approaches to 1,2-Dihydroisoquinolines and 1-Indanones. Chemistry 2016; 22:5727-33. [DOI: 10.1002/chem.201504914] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Indexed: 01/25/2023]
Affiliation(s)
- Run Sun
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; East China University of Science and Technology; Meilong Road No. 130 Shanghai 200237 China
| | - Yu Jiang
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; East China University of Science and Technology; Meilong Road No. 130 Shanghai 200237 China
| | - Xiang-Ying Tang
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Min Shi
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; East China University of Science and Technology; Meilong Road No. 130 Shanghai 200237 China
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
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33
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Shang H, Tian Y, Luo J, Li L, Tang Y, Zou Z. Rhodium(ii)-catalyzed intramolecular annulation of 1-sulfonyl-1,2,3-triazoles with indoles: facile synthesis of functionalized tetrahydro-β-carbolines. RSC Adv 2016. [DOI: 10.1039/c6ra02923j] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel rhodium(ii)-catalyzed intramolecular annulation of 1-sulfonyl-1,2,3-triazoles with indoles has been developed, which enables the facile synthesis of various 4-functionalized tetrahydro-β-carbolines and relevant scaffolds from readily available starting materials.
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Affiliation(s)
- Hai Shang
- Institute of Medicinal Plant Development
- Chinese Academy of Medical Sciences and Peking Union Medical College
- Beijing 100193
- P. R. China
| | - Yu Tian
- Institute of Medicinal Plant Development
- Chinese Academy of Medical Sciences and Peking Union Medical College
- Beijing 100193
- P. R. China
| | - Jun Luo
- Institute of Medicinal Plant Development
- Chinese Academy of Medical Sciences and Peking Union Medical College
- Beijing 100193
- P. R. China
| | - Lingyu Li
- Institute of Medicinal Plant Development
- Chinese Academy of Medical Sciences and Peking Union Medical College
- Beijing 100193
- P. R. China
| | - Yefeng Tang
- Comprehensive AIDS Research Center
- Department of Pharmacology & Pharmaceutical Sciences
- School of Medicine
- Tsinghua University
- Beijing 100084
| | - Zhongmei Zou
- Institute of Medicinal Plant Development
- Chinese Academy of Medical Sciences and Peking Union Medical College
- Beijing 100193
- P. R. China
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34
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Meng J, Ding X, Yu X, Deng WP. Synthesis of 2,5-epoxy-1,4-benzoxazepines via rhodium(II)-catalyzed reaction of 1-tosyl-1,2,3-triazoles and salicylaldehydes. Tetrahedron 2016. [DOI: 10.1016/j.tet.2015.11.021] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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35
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Seo B, Jeon WH, Kim CE, Kim S, Kim SH, Lee PH. Sequential Functionalization of the OH and C(sp2)O Bonds of Tropolones by Alkynes andN-Sulfonyl Azides. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500829] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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36
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Rhodium(II)‐Catalyzed Regioselective Carbenoid Insertion Reaction of Simple Indoles with
N
‐Sulfonyltriazoles: A Rapid Access to Tryptamine Vinylogues. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500792] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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37
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Xu HD, Pan YP, Ren XT, Zhang P, Shen MH. A one-pot construction of acridones by rhodium catalyzed reaction of N -phenyl-2-(1-sulfonyl-1 H -1,2,3-triazol-4-yl)aniline. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.10.059] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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38
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Kim S, Kim JE, Lee J, Lee PH. N-Imidazolylation of Sulfoximines fromN-Cyano Sulfoximines, 1-Alkynes, andN-Sulfonyl Azides. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500636] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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39
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Yadagiri D, Anbarasan P. Tandem 1,2-sulfur migration and (aza)-Diels-Alder reaction of β-thio-α-diazoimines: rhodium catalyzed synthesis of (fused)-polyhydropyridines, and cyclohexenes. Chem Sci 2015; 6:5847-5852. [PMID: 29861910 PMCID: PMC5950192 DOI: 10.1039/c5sc02379c] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Accepted: 07/09/2015] [Indexed: 01/02/2023] Open
Abstract
Rhodium catalyzed synthesis of substituted tetrahydropyridines was accomplished from readily accessible thio-tethered N-sulfonyl-1,2,3-triazoles. The reaction involves tandem rhodium catalyzed 1,2-sulfur migration in β-thio-α-diazoimines, generated from thio-tethered N-sulfonyl-1,2,3-triazoles, to thio-substituted 1-azadiene and subsequent self aza-Diels-Alder reaction. Interestingly, the methodology was effectively extended to the synthesis of fused tetrahydropyridines, dihydropyridines and cyclohexenes through the in situ trapping of the intermediate, 1-azadiene, with various dienophiles such as enol ether, enamine, ketene S,S-acetal, alkyne, alkene and diene. Furthermore, the direct conversion of propargyl sulfides to (fused)-tetrahydropyridines was also achieved through the successful integration of copper and rhodium catalysts in one-pot.
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Affiliation(s)
- Dongari Yadagiri
- Department of Chemistry , Indian Institute of Technology Madras , Chennai 600036 , India .
| | - Pazhamalai Anbarasan
- Department of Chemistry , Indian Institute of Technology Madras , Chennai 600036 , India .
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40
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Shi Y, Yu X, Li CY. Rhodium-Catalyzed Synthesis of 2,5-Epoxybenzo[f][1,4]oxazepines by Tandem Reaction of 1-Sulfonyl-1,2,3-triazoles and Salicylaldehydes. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500912] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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41
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Shin S, Park Y, Kim CE, Son JY, Lee PH. Synthesis of 2-Alkoxyaryl-2-aryl Enamines via Tandem Copper-Catalyzed Cycloaddition and Rhodium-Catalyzed Alkoxyarylation from Alkynes, N-Sulfonyl Azides, and Aryl Ethers. J Org Chem 2015; 80:5859-69. [PMID: 25940682 DOI: 10.1021/acs.joc.5b00891] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A synthetic route to a wide range of 2-alkoxyaryl-2-aryl enamines is developed from Rh-catalyzed alkoxyarylation of N-sulfonyl-4-aryl-1,2,3-triazoles with aryl ethers via the elimination of nitrogen molecule. In addition, 2-alkoxyaryl-2-aryl enamines are prepared via tandem Cu-catalyzed cycloaddition and Rh-catalyzed alkoxyarylation starting from alkynes, N-sulfonyl azides, and aryl ethers in one-pot.
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Affiliation(s)
- Seohyun Shin
- National Creative Research Initiative Center for Catalytic Organic Reactions, Department of Chemistry, Kangwon National University, Chuncheon 200-701, Republic of Korea
| | - Youngchul Park
- National Creative Research Initiative Center for Catalytic Organic Reactions, Department of Chemistry, Kangwon National University, Chuncheon 200-701, Republic of Korea
| | - Cheol-Eui Kim
- National Creative Research Initiative Center for Catalytic Organic Reactions, Department of Chemistry, Kangwon National University, Chuncheon 200-701, Republic of Korea
| | - Jeong-Yu Son
- National Creative Research Initiative Center for Catalytic Organic Reactions, Department of Chemistry, Kangwon National University, Chuncheon 200-701, Republic of Korea
| | - Phil Ho Lee
- National Creative Research Initiative Center for Catalytic Organic Reactions, Department of Chemistry, Kangwon National University, Chuncheon 200-701, Republic of Korea
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