1
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Kulikovskaya NS, Ondar EE, Perepukhov AM, Kostyukovich AY, Novikov RA, Ananikov VP. Structure and Dynamic Rearrangements of the Pt 2dba 3 and Pd 2dba 3 Complexes in Solution. Inorg Chem 2024; 63:10527-10541. [PMID: 38813621 DOI: 10.1021/acs.inorgchem.4c00803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2024]
Abstract
Although the tris(dibenzylideneacetone)diplatinum complex (Pt2dba3) is an important source of Pt(0) used in catalysis and materials science, its structure has not yet been fully elucidated. A thorough study of the three-dimensional structure of Pt2dba3 and its dynamic behavior in solution was carried out using NMR spectroscopy methods at a high field (600 MHz) and molecular modeling. The complex was shown to contain three dba ligands in the s-cis,s-trans, s-trans,s-cis, and s-trans,s-trans conformations, which are uniformly oriented around the Pt2 backbone. In solution, the Pt2dba3 and Pd2dba3 complexes undergo rapid dynamic rearrangements, as evidenced by the exchange between the signals of the olefin protons of various dba ligands in the EXSY NMR spectra. According to the experimental measurements, the activation energies of the rearrangements were estimated to be 19.9 ± 0.2 and 17.9 ± 0.2 kcal/mol for the platinum and palladium complexes, respectively. Three possible mechanisms for this chemical exchange process were considered within the framework of DFT calculations. According to the calculated data, M2dba3 complexes undergo fluxional isomerization involving successive rotations of the dihedral angles formed by the carbonyl group and the C═C bond. Dissociation of dba ligands does not occur within these processes.
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Affiliation(s)
- Natalia S Kulikovskaya
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow 119991, Russia
| | - Evgeniia E Ondar
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow 119991, Russia
| | - Alexander M Perepukhov
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow 119991, Russia
| | | | - Roman A Novikov
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow 119991, Russia
| | - Valentine P Ananikov
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow 119991, Russia
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2
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Choi D, Takahashi N, Maruoka H, Harada S, Nastke A, Gröger H, Nemoto T. Synthetic Study of Dragmacidin E: Enantioselective Construction of the Seven-Membered Ring-Fused Indole Skeleton with Contiguous Stereocenters. J Org Chem 2023. [PMID: 36701491 DOI: 10.1021/acs.joc.2c02216] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
We developed an enantioselective synthetic method of constructing a seven-membered ring-fused indole skeleton with contiguous stereocenters for the synthesis of dragmacidin E. Introduction of chirality at the benzylic position was achieved by Ir-catalyzed asymmetric hydrogenation. After construction of the tricyclic molecular framework using Pd-catalyzed cascade cyclization, the tetrasubstituted carbon center was created using the Ag nitrene-mediated C-H amination reaction. The developed method provided access to the functionalized seven-membered ring-fused indole skeleton with a hydroxymethyl branch in the tetrasubstituted carbon.
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Affiliation(s)
- Dongil Choi
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Noa Takahashi
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Haruka Maruoka
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Shingo Harada
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Alina Nastke
- Faculty of Chemistry, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany
| | - Harald Gröger
- Faculty of Chemistry, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany
| | - Tetsuhiro Nemoto
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8675, Japan
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3
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Inoue T, Matsuda K, Matsusaka K, Nakajima M, Takeno Y, Miyazaki T, Shintaku T, Yoda N, Saito T, Ikeda E, Mano Y, Shinohara K, Rahmutulla B, Fukuyo M, Kita K, Nemoto T, Kaneda A. Anti-proliferating and apoptosis-inducing activity of chemical compound FTI-6D in association with p53 in human cancer cell lines. Chem Biol Interact 2023; 369:110257. [PMID: 36375514 DOI: 10.1016/j.cbi.2022.110257] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 10/24/2022] [Accepted: 11/07/2022] [Indexed: 11/13/2022]
Abstract
Compounds with 3,4-fused tricyclic indole (FTI) frameworks are attractive scaffolds for drug discovery. We synthesized FTI-6D, a compound with this framework, which was cytotoxic in several human cancer cell lines. FTI-6D induced apoptosis via activation of the p53 downstream mitochondria-related apoptotic pathway, characterized by an increased ratio of pro-apoptotic Bcl-2 family members to anti-apoptotic members. This change was followed by caspase-9 and caspase-3 cleavage and activation in two cancer cell lines, RKO and AGS. The anti-proliferating effect of FTI-6D was remarkably detected in eight cancer cells with wild-type TP53 (TP53_wt), including RKO and AGS, but not in seven cancer cells with mutated TP53 (TP53_mut). Additionally, p53 protein levels increased after FTI-6D treatment in TP53_wt cancer cells, and the cytotoxic effect of FTI-6D was decreased by TP53 knockdown. Accordingly, the expression of p53 downstream genes involved in apoptotic signaling pathways, such as BBC3 and TP53INP1, and those involved in cell growth inhibition, such as CDKN1A, was upregulated in TP53_wt cancer cells. These results suggest that the anti-proliferative and apoptosis-inducing activities of FTI-6D rely on p53 and the corresponding signaling processes. This study demonstrated that FTI-6D shows anti-cancer activity against TP53_wt cancer cells. FTI-6D may have potential as a prototype compound for a new drug to utilize a functional p53 pathway in TP53_wt cancer cells.
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Affiliation(s)
- Takato Inoue
- Department of Molecular Oncology, Graduate School of Medicine, Chiba University, Chiba, 260-8670, Japan
| | - Kazuaki Matsuda
- Department of Molecular Oncology, Graduate School of Medicine, Chiba University, Chiba, 260-8670, Japan
| | - Keisuke Matsusaka
- Department of Molecular Oncology, Graduate School of Medicine, Chiba University, Chiba, 260-8670, Japan
| | - Masaya Nakajima
- Department of Pharmaceutical Chemistry, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8670, Japan
| | - Yukari Takeno
- Department of Molecular Oncology, Graduate School of Medicine, Chiba University, Chiba, 260-8670, Japan
| | - Toko Miyazaki
- Department of Molecular Oncology, Graduate School of Medicine, Chiba University, Chiba, 260-8670, Japan
| | - Takahiko Shintaku
- Department of Molecular Oncology, Graduate School of Medicine, Chiba University, Chiba, 260-8670, Japan
| | - Natsumi Yoda
- Department of Molecular Oncology, Graduate School of Medicine, Chiba University, Chiba, 260-8670, Japan
| | - Takahiko Saito
- Department of Molecular Oncology, Graduate School of Medicine, Chiba University, Chiba, 260-8670, Japan
| | - Eriko Ikeda
- Department of Molecular Oncology, Graduate School of Medicine, Chiba University, Chiba, 260-8670, Japan
| | - Yasunobu Mano
- Department of Molecular Oncology, Graduate School of Medicine, Chiba University, Chiba, 260-8670, Japan
| | - Kenichi Shinohara
- Department of Molecular Oncology, Graduate School of Medicine, Chiba University, Chiba, 260-8670, Japan
| | - Bahityar Rahmutulla
- Department of Molecular Oncology, Graduate School of Medicine, Chiba University, Chiba, 260-8670, Japan
| | - Masaki Fukuyo
- Department of Molecular Oncology, Graduate School of Medicine, Chiba University, Chiba, 260-8670, Japan
| | - Kazuko Kita
- Department of Molecular Oncology, Graduate School of Medicine, Chiba University, Chiba, 260-8670, Japan
| | - Tetsuhiro Nemoto
- Department of Pharmaceutical Chemistry, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, 260-8670, Japan
| | - Atsushi Kaneda
- Department of Molecular Oncology, Graduate School of Medicine, Chiba University, Chiba, 260-8670, Japan.
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4
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Kuribara T, Nakajima M, Nemoto T. Mechanistic Studies of the Pd- and Pt-Catalyzed Selective Cyclization of Propargyl/Allenyl Complexes. J Org Chem 2021; 86:9670-9681. [PMID: 34176262 DOI: 10.1021/acs.joc.1c00941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Following the discovery of an unusual transition-metal-catalyzed reaction, the elucidation of the underlying mechanism is essential to understand the characteristic reactivity of the metal. We previously reported a synthetic method for tricyclic indoles using Pt-catalyzed Friedel-Crafts-type C-H coupling. In this reaction, the Pt catalyst selectively formed a seven-membered ring, but the Pd catalyst only afforded a six-membered ring. However, the reasons for the different selectivities caused by Pd and Pt were unclear. We performed density functional theory (DFT) calculations and experimental studies to reveal the origin of the different behaviors of the two metals. The calculations revealed that the formation of the six- and seven-membered rings proceeds via η1-allenyl and η3-propargyl/allenyl complexes, respectively. A molecular orbital analysis of the η3-propargyl/allenyl complex revealed that, for the platinum complex, the energy required to convert the unoccupied molecular orbital on the reactive carbon into the lowest unoccupied molecular orbital (LUMO) was lower than that for the palladium complex. In addition, DFT calculations revealed that the combination of platinum and bis[2-(diphenylphosphino)phenyl] ether (DPEphos) reduced the activation energy of the seven-membered cyclization in comparison with palladium or PPh3. Additional experimental studies, including NMR studies and stoichiometric reactions, support the aforementioned examination.
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Affiliation(s)
- Takahito Kuribara
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Masaya Nakajima
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Tetsuhiro Nemoto
- Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8675, Japan
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5
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He H, Xu N, Zhang H, Chen B, Hu Z, Guo K, Chun J, Cao S, Zhu Y. Brønsted acid-promoted hydroamination of unsaturated hydrazones: access to biologically important 5-arylpyrazolines. RSC Adv 2021; 11:17340-17345. [PMID: 35479684 PMCID: PMC9033072 DOI: 10.1039/d1ra03043d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Accepted: 04/29/2021] [Indexed: 12/25/2022] Open
Abstract
A novel and efficient Brønsted acid-promoted hydroamination of hydrazone-tethered olefins has been developed. A variety of pyrazolines have been easily obtained in good to excellent yields with high chemo- and regioselectivity under simple and mild conditions. This method represents a straightforward, facile, and practical approach toward biologically important 5-arylpyrazolines, which are difficult to access by previously reported radical hydroamination of β,γ-unsaturated hydrazones. An efficient, chemo- and regioselective Brønsted acid-promoted hydroamination reaction of hydrazone-tethered olefins towards 5-arylpyrazolines was developed.![]()
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Affiliation(s)
- Han He
- Jiangsu Key Laboratory of Pesticide Science
- Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
| | - Ning Xu
- Jiangsu Key Laboratory of Pesticide Science
- Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
| | - Honglin Zhang
- Jiangsu Key Laboratory of Pesticide Science
- Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
| | - Bin Chen
- Jiangsu Key Laboratory of Pesticide Science
- Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
| | - Zhengnan Hu
- Jiangsu Key Laboratory of Pesticide Science
- Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
| | - Kang Guo
- Jiangsu Key Laboratory of Pesticide Science
- Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
| | - Jianlin Chun
- Jiangsu Key Laboratory of Pesticide Science
- Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
| | - Shujun Cao
- Jiangsu Key Laboratory of Pesticide Science
- Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
| | - Yingguang Zhu
- Jiangsu Key Laboratory of Pesticide Science
- Department of Chemistry
- College of Sciences
- Nanjing Agricultural University
- Nanjing 210095
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6
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Cheng C, Zuo X, Tu D, Wan B, Zhang Y. Synthesis of 3,4-Fused Tricyclic Indoles through Cascade Carbopalladation and C-H Amination: Development and Total Synthesis of Rucaparib. Org Lett 2020; 22:4985-4989. [PMID: 32610935 DOI: 10.1021/acs.orglett.0c01513] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
3,4-Fused tricyclic indole scaffolds are ubiquitous in bioactive natural products and pharmaceuticals. A new protocol for the synthesis of 3,4-fused tricyclic indoles has been developed through cascade carbopalladation and C-H amination with N,N-di-tert-butyldiaziridinone. The protocol allows access to a range of 3,4-fused tricyclic indoles, including those containing various linkers and fused with medium-sized rings. Rucaparib can be synthesized via this reaction, providing an advantageous synthetic method for the FDA-approved cancer medicine.
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Affiliation(s)
- Cang Cheng
- School of Chemical Science and Engineering, Shanghai Key Laboratory of Chemical Assessment and Sustainability, Tongji University 1239 Siping Road, Shanghai 200092, China
| | - Xiang Zuo
- School of Chemical Science and Engineering, Shanghai Key Laboratory of Chemical Assessment and Sustainability, Tongji University 1239 Siping Road, Shanghai 200092, China
| | - Dongdong Tu
- School of Chemical Science and Engineering, Shanghai Key Laboratory of Chemical Assessment and Sustainability, Tongji University 1239 Siping Road, Shanghai 200092, China
| | - Bin Wan
- School of Chemical Science and Engineering, Shanghai Key Laboratory of Chemical Assessment and Sustainability, Tongji University 1239 Siping Road, Shanghai 200092, China
| | - Yanghui Zhang
- School of Chemical Science and Engineering, Shanghai Key Laboratory of Chemical Assessment and Sustainability, Tongji University 1239 Siping Road, Shanghai 200092, China
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7
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Nakajima M, Kondo Y, Nakano SI, Adachi Y, Choi D, Franzén R, Nemoto T. Radical cascade cyclization for synthesizing 3,4-fused tricyclic benzofuran derivatives. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151754] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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8
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Connon R, Guiry PJ. Recent advances in the development of one-pot/multistep syntheses of 3,4-annulated indoles. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151696] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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9
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Novartis Chemistry Lectureship 2018–2019: E. A. Anderson, M. B. Francis, R. Martín, M. Sodeoka. Angew Chem Int Ed Engl 2019; 58:1549. [DOI: 10.1002/anie.201813736] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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10
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Novartis Chemistry Lectureship 2018–2019: E. A. Anderson, M. B. Francis, R. Martín, M. Sodeoka. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201813736] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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11
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Chen S, Ravichandiran P, El-Harairy A, Queneau Y, Li M, Gu Y. 4-Aminoindoles as 1,4-bisnucleophiles for diversity-oriented synthesis of tricyclic indoles bearing 3,4-fused seven-membered rings. Org Biomol Chem 2019; 17:5982-5989. [DOI: 10.1039/c9ob01045a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A straightforward access to tricyclic indoles bearing 3,4-fused seven-membered rings was established by using 4-aminoindoles as 1,4-bisnucleophiles in three-component reactions.
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Affiliation(s)
- Shaomin Chen
- Key Laboratory for Large-Format Battery Materials and System
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Huazhong University of Science and Technology
- Wuhan
| | - Palanisamy Ravichandiran
- Key Laboratory for Large-Format Battery Materials and System
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Huazhong University of Science and Technology
- Wuhan
| | - Ahmed El-Harairy
- Key Laboratory for Large-Format Battery Materials and System
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Huazhong University of Science and Technology
- Wuhan
| | - Yves Queneau
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires
- Univ Lyon
- CNRS
- Université Lyon 1
- INSA Lyon
| | - Minghao Li
- Key Laboratory for Large-Format Battery Materials and System
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Huazhong University of Science and Technology
- Wuhan
| | - Yanlong Gu
- Key Laboratory for Large-Format Battery Materials and System
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Huazhong University of Science and Technology
- Wuhan
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12
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Takeda T, Harada S, Okabe A, Nishida A. Cyclohepta[ b]indole Synthesis through [5 + 2] Cycloaddition: Bifunctional Indium(III)-Catalyzed Stereoselective Construction of 7-Membered Ring Fused Indoles. J Org Chem 2018; 83:11541-11551. [PMID: 30179462 DOI: 10.1021/acs.joc.8b01407] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new approach for the synthesis of highly functionalized tetrahydrocyclohepta[ b]indoles through [5 + 2] cycloaddition was developed. Two carbon-carbon bonds were formed by the simple addition of an indium catalyst, which acted as both a π-Lewis acid and σ-Lewis acid to activate the alkyne and unsaturated ester, respectively. The reaction could be applied to various substrates and proceeded regio- and diastereoselectively in all cases.
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Affiliation(s)
- Takuya Takeda
- Graduate School of Pharmaceutical Sciences , Chiba University , 1-8-1 Inohana, Chuo-ku , 263-8522 Chiba , Japan
| | - Shinji Harada
- Graduate School of Pharmaceutical Sciences , Chiba University , 1-8-1 Inohana, Chuo-ku , 263-8522 Chiba , Japan.,Molecular Chirality Research Center , Chiba University , 1-33 Yayoi-cho, Inage-ku , 263-8522 Chiba , Japan
| | - Akito Okabe
- Graduate School of Pharmaceutical Sciences , Chiba University , 1-8-1 Inohana, Chuo-ku , 263-8522 Chiba , Japan
| | - Atsushi Nishida
- Graduate School of Pharmaceutical Sciences , Chiba University , 1-8-1 Inohana, Chuo-ku , 263-8522 Chiba , Japan.,Molecular Chirality Research Center , Chiba University , 1-33 Yayoi-cho, Inage-ku , 263-8522 Chiba , Japan
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13
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Ding L, You SL. Palladium(0)-Catalyzed Intermolecular Cascade Dearomatization Reaction of β-Naphthol Derivatives with Propargyl Carbonates. Org Lett 2018; 20:6206-6210. [DOI: 10.1021/acs.orglett.8b02681] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Lu Ding
- School of Physical Science and Technology, ShanghaiTech University, 100 Haike Road, Shanghai 201210, China
| | - Shu-Li You
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
- School of Physical Science and Technology, ShanghaiTech University, 100 Haike Road, Shanghai 201210, China
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14
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Nemoto T, Harada S, Nakajima M. Synthetic Methods for 3,4-Fused Tricyclic Indoles via Indole Ring Formation. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800336] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Tetsuhiro Nemoto
- Graduate School of Pharmaceutical Sciences; Chiba University; I1-8-1, Inohana, Chuo-ku Chiba 260-8675 Japan
- Molecular Chirality Research Center; Chiba University; 1-33, Yayoi-cho, Inage-ku Chiba 263-8522, Japan
| | - Shingo Harada
- Graduate School of Pharmaceutical Sciences; Chiba University; I1-8-1, Inohana, Chuo-ku Chiba 260-8675 Japan
| | - Masaya Nakajima
- Graduate School of Pharmaceutical Sciences; Chiba University; I1-8-1, Inohana, Chuo-ku Chiba 260-8675 Japan
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15
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Nemoto T. Synthesis of 3,4‐Fused Tricyclic Indoles Using 3‐Alkylidene Indolines as Versatile Precursors. CHEM REC 2018; 19:320-332. [DOI: 10.1002/tcr.201800043] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 06/06/2018] [Indexed: 12/31/2022]
Affiliation(s)
- Tetsuhiro Nemoto
- Graduate School of Pharmaceutical SciencesChiba University 1-8-1, Inohana, Chuo-ku Chiba 260-8675 Japan
- Molecular Chirality Research CenterChiba University 1-33, Yayoi-cho, Inage-ku Chiba 263-8522 Japan
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16
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Differentiating alkyne reactivity in the post-Ugi transformations: Access to polycyclic indole-fused frameworks. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.03.079] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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17
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Nakano SI, Hamada Y, Nemoto T. Enantioselective formal synthesis of (−)-aurantioclavine using Pd-catalyzed cascade cyclization and organocatalytic asymmetric aziridination. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.01.033] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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18
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Inoue N, Nakano SI, Harada S, Hamada Y, Nemoto T. Synthetic Study of Dragmacidin E: Construction of the Core Structure Using Pd-Catalyzed Cascade Cyclization and Rh-Catalyzed Aminoacetoxylation. J Org Chem 2017; 82:2787-2793. [DOI: 10.1021/acs.joc.7b00083] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Naoya Inoue
- Graduate
School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Shun-ichi Nakano
- Graduate
School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Shingo Harada
- Graduate
School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Yasumasa Hamada
- Graduate
School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8675, Japan
| | - Tetsuhiro Nemoto
- Graduate
School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8675, Japan
- Molecular
Chirality Research Center, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
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19
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Park J, Kim DH, Das T, Cho CG. Intramolecular Fischer Indole Synthesis for the Direct Synthesis of 3,4-Fused Tricyclic Indole and Application to the Total Synthesis of (−)-Aurantioclavine. Org Lett 2016; 18:5098-5101. [DOI: 10.1021/acs.orglett.6b02541] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jun Park
- Center
for New Directions
in Organic Synthesis, Department of Chemistry, Hanyang University, 222 Wangshimni-ro, Seongdong-gu, Seoul 04763, Korea
| | - Dong-Hyun Kim
- Center
for New Directions
in Organic Synthesis, Department of Chemistry, Hanyang University, 222 Wangshimni-ro, Seongdong-gu, Seoul 04763, Korea
| | - Tapas Das
- Center
for New Directions
in Organic Synthesis, Department of Chemistry, Hanyang University, 222 Wangshimni-ro, Seongdong-gu, Seoul 04763, Korea
| | - Cheon-Gyu Cho
- Center
for New Directions
in Organic Synthesis, Department of Chemistry, Hanyang University, 222 Wangshimni-ro, Seongdong-gu, Seoul 04763, Korea
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