1
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Wei L, Xiao X, Cai M. Recyclable gold(I)-catalyzed heterocyclization of ynamides with benzyl or indolyl azides towards 2-aminoindoles or 3-amino-β-carbolines. Org Biomol Chem 2023; 21:8757-8766. [PMID: 37877426 DOI: 10.1039/d3ob01555f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2023]
Abstract
A highly efficient heterogeneous gold(I)-catalyzed heterocyclization of ynamides with benzyl or indolyl azides has been achieved in 1,2-dichloroethane under mild conditions via a heterogenized α-imino gold carbene intermediate using 5 mol% of SBA-15-anchored strongly hindered NHC-gold(I) complex [IPr-SBA-15-AuNTf2] as the catalyst, delivering a wide range of valuable 2-aminoindoles or 3-amino-β-carbolines in mostly good to excellent yields with high regioselectivity. Furthermore, the new heterogenized NHC-gold(I) complex displays the same catalytic activity as IPrAuNTf2 and is facile to recover by centrifugation of the reaction mixture and can be reused at least seven times without any appreciable drop in its catalytic activity.
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Affiliation(s)
- Li Wei
- Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education and College of Chemistry & Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China.
| | - Xiaoqiang Xiao
- Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education and College of Chemistry & Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China.
| | - Mingzhong Cai
- Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education and College of Chemistry & Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China.
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2
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Yang L, Hou A, Jiang Q, Cheng M, Liu Y. Methodological Development and Applications of Tryptamine-Ynamide Cyclizations in Synthesizing Core Skeletons of Indole Alkaloids. J Org Chem 2023; 88:11377-11391. [PMID: 37540141 DOI: 10.1021/acs.joc.3c01088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/05/2023]
Abstract
Over the past two decades, synthetic strategies for synthesizing the skeletons of various indole alkaloids based on tryptamine-ynamide have been continuously developed and applied to the total syntheses or formal total syntheses of related molecules. In this synopsis, we summarized the cyclization pathways of tryptamine-ynamide under different catalytic conditions, emphasizing the reaction mechanism and applications in the syntheses of indole alkaloids.
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Affiliation(s)
- Lu Yang
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Anbin Hou
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Qing Jiang
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Maosheng Cheng
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
| | - Yongxiang Liu
- Key Laboratory of Structure-Based Drug Design and Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
- Institute of Drug Research in Medicine Capital of China, Benxi 117000, P. R. China
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3
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Sugitate K, Yamashiro T, Takahashi I, Yamada K, Abe T. Oxytrofalcatin Puzzle: Total Synthesis and Structural Revision of Oxytrofalcatins B and C. J Org Chem 2023. [PMID: 37433109 DOI: 10.1021/acs.joc.3c00691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/13/2023]
Abstract
The previously reported structures of oxytrofalcatins B and C possess a benzoyl indole core. However, following synthesis and NMR comparison of both the proposed structure and the synthesized oxazole, we have revised the structure of oxytrofalcatins B and C as oxazoles. The synthetic route developed herein can further our understanding of the biosynthetic pathways that govern the production of natural 2,5-diaryloxazoles.
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Affiliation(s)
- Kazuma Sugitate
- Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 1-1-1 Tsushima-naka, Kita-ku, Okayama 7008530, Japan
| | - Toshiki Yamashiro
- Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 1-1-1 Tsushima-naka, Kita-ku, Okayama 7008530, Japan
| | - Ibuki Takahashi
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari-tobetsu, Hokkaido 0610293, Japan
| | - Koji Yamada
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari-tobetsu, Hokkaido 0610293, Japan
| | - Takumi Abe
- Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 1-1-1 Tsushima-naka, Kita-ku, Okayama 7008530, Japan
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4
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Alkubaisi BO, Ravi A, Srikanth G, Sebastian A, Khanfar MA, El-Gamal MI, Sieburth SM, Shahin AI, Al-Tel TH. Divergent Protocol for the Synthesis of Isoquinolino[1,2- b]quinazolinone and Isoquinolino[2,1- a]quinazolinone Derivatives. J Org Chem 2023; 88:4244-4253. [PMID: 36926917 DOI: 10.1021/acs.joc.2c02791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023]
Abstract
The development of robust and step-economic strategies to access structurally diverse drug-like compound collections remains a challenge. A distinct structural option that constitutes the core scaffold of many biologically significant molecules is the quinazolinone ring system. Several members of this family of privileged substructures have gained attention due to their diverse biological activities. In this context, the development of an efficient strategy for their access is needed. Herein, we report a divergent metal-free operation to access a diverse collection of C6-substituted pyrrolo[4',3',2':4,5]isoquinolino[1,2-b]quinazolin-8(6H)-one and pyrrolo[4',3',2':4,5]isoquinolino[2,1-a]quinazolin-12(6H)-one architectures. The described cascade unites Friedel-Crafts and aza-Michael addition reactions. This operationally simple protocol enables a rapid access to these scaffolds and is compatible with a wide scope of starting materials. In addition, the cascade features a promising approach for the design of unique compound libraries for drug design and discovery programs.
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Affiliation(s)
- Bilal O Alkubaisi
- Sharjah Institute for Medical Research, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Anil Ravi
- Sharjah Institute for Medical Research, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Gourishetty Srikanth
- Department of Biology, Chemistry and Environmental Sciences, American University of Sharjah, Sharjah 26666, United Arab Emirates
| | - Anusha Sebastian
- Sharjah Institute for Medical Research, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Monther A Khanfar
- College of Science, Department of Chemistry, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Mohammed I El-Gamal
- Sharjah Institute for Medical Research, University of Sharjah, Sharjah 27272, United Arab Emirates.,Department of Medicinal Chemistry, College of Pharmacy, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Scott McN Sieburth
- Department of Chemistry, Temple University, 201 Beury Hall, Philadelphia, Pennsylvania 19122, United States
| | - Afnan I Shahin
- Sharjah Institute for Medical Research, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Taleb H Al-Tel
- Sharjah Institute for Medical Research, University of Sharjah, Sharjah 27272, United Arab Emirates.,Department of Medicinal Chemistry, College of Pharmacy, University of Sharjah, Sharjah 27272, United Arab Emirates
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5
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Wang XW, Huang WJ, Wang H, Wu B, Zhou YG. Chiral-Phosphoric-Acid-Catalyzed C6-Selective Pictet-Spengler Reactions for Construction of Polycyclic Indoles Containing Spiro Quaternary Stereocenters. Org Lett 2022; 24:1727-1731. [PMID: 35199528 DOI: 10.1021/acs.orglett.2c00368] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Compared with the well-established asymmetric Pictet-Spengler reactions on the pyrrole ring of indoles, the catalytic asymmetric Pictet-Spengler reaction on the benzene ring of indoles has been rarely studied. Herein the C6-selective Pictet-Spengler reactions of indoles have been realized by employing 2-(1H-indol-7-yl)anilines and isatins in the presence of chiral phosphoric acid, affording novel polycyclic indole derivatives bearing spiro quaternary stereocenters in excellent yields with excellent enantioselectivities. This reaction could be conducted on the gram scale without any loss of activity or enantioselectivity.
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Affiliation(s)
- Xin-Wei Wang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning 116023, P. R. China.,Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China
| | - Wen-Jun Huang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning 116023, P. R. China
| | - Han Wang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning 116023, P. R. China
| | - Bo Wu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning 116023, P. R. China
| | - Yong-Gui Zhou
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning 116023, P. R. China.,Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian 116024, P. R. China
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6
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CHEN BR, GAO CL, LIU J, GUO YW, JIANG JL, PANG T, LI XW. Diversity-oriented synthesis of marine sponge derived hyrtioreticulins and their anti-inflammatory activities. Chin J Nat Med 2022; 20:74-80. [DOI: 10.1016/s1875-5364(22)60155-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Indexed: 11/03/2022]
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7
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Milcendeau P, Zhang Z, Glinsky-Olivier N, van Elslande E, Guinchard X. Au(I)-Catalyzed Pictet-Spengler Reactions All around the Indole Ring. J Org Chem 2021; 86:6406-6422. [PMID: 33887914 DOI: 10.1021/acs.joc.1c00270] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Au(I) complexes catalyze iso-Pictet-Spengler reactions. Ethylamine or methylamine chains were introduced at C2, C4, or the nitrogen atom of the indole ring, and the corresponding substrates were reacted in the presence of aldehydes and catalytic amounts of Au(I) complexes, leading to a variety of polycyclic scaffolds. Selectivity could be achieved in the course of a double iso-Pictet-Spengler reaction involving two successive aldehydes, leading to highly complex molecules.
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Affiliation(s)
- Pierre Milcendeau
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198 Gif-sur-Yvette, France
| | - Zhenhao Zhang
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198 Gif-sur-Yvette, France.,LCM, CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, 91128 Palaiseau, France
| | - Nicolas Glinsky-Olivier
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198 Gif-sur-Yvette, France
| | - Elsa van Elslande
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198 Gif-sur-Yvette, France
| | - Xavier Guinchard
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198 Gif-sur-Yvette, France
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8
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Kaur M, Garg S, Malhi DS, Sohal HS. A Review on Synthesis, Reactions and Biological Properties of Seven Membered Heterocyclic Compounds: Azepine, Azepane, Azepinone. CURR ORG CHEM 2021. [DOI: 10.2174/1385272825999210104222338] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Seven membered heterocyclic Azepine and its derivatives have great pharmacological
and therapeutic implications. In this review, the literature of the last fifty years has
been exploited for the synthesis, reaction, and biological properties of these seven-member
heterocyclic compounds. Most of the mechanisms involved the ring expansion of either five
or six-membered compounds using various methods such as thermally, photo-chemically, and
microwave irradiation. The systematically designed schemes involve the synthesis of different
derivatives of azepine, azepinone, azepane, etc., using similar moieties by various researchers.
However, there is much work yet to be done in the biological section, as it is not
explored and reported in the literature; therefore, N-containing seven-membered heterocycles
still have much scope for the researchers.
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Affiliation(s)
- Manvinder Kaur
- Department of Chemistry, Chandigarh University, Gharuan-140413, Mohali, Punjab, India
| | - Sonali Garg
- Department of Chemistry, Chandigarh University, Gharuan-140413, Mohali, Punjab, India
| | - Dharambeer S. Malhi
- Department of Chemistry, Chandigarh University, Gharuan-140413, Mohali, Punjab, India
| | - Harvinder S. Sohal
- Department of Chemistry, Chandigarh University, Gharuan-140413, Mohali, Punjab, India
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9
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Ghashghaei O, Pedrola M, Seghetti F, Martin VV, Zavarce R, Babiak M, Novacek J, Hartung F, Rolfes KM, Haarmann‐Stemmann T, Lavilla R. Extended Multicomponent Reactions with Indole Aldehydes: Access to Unprecedented Polyheterocyclic Scaffolds, Ligands of the Aryl Hydrocarbon Receptor. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202011253] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ouldouz Ghashghaei
- Laboratory of Medicinal Chemistry Faculty of Pharmacy and Food Sciences and Institute of Biomedicine (IBUB) Universitat de Barcelona Av. Joan XXIII, 27–31 08028 Barcelona Spain
| | - Marina Pedrola
- Laboratory of Medicinal Chemistry Faculty of Pharmacy and Food Sciences and Institute of Biomedicine (IBUB) Universitat de Barcelona Av. Joan XXIII, 27–31 08028 Barcelona Spain
| | - Francesca Seghetti
- Laboratory of Medicinal Chemistry Faculty of Pharmacy and Food Sciences and Institute of Biomedicine (IBUB) Universitat de Barcelona Av. Joan XXIII, 27–31 08028 Barcelona Spain
| | - Victor V. Martin
- Laboratory of Medicinal Chemistry Faculty of Pharmacy and Food Sciences and Institute of Biomedicine (IBUB) Universitat de Barcelona Av. Joan XXIII, 27–31 08028 Barcelona Spain
| | - Ricardo Zavarce
- Laboratory of Medicinal Chemistry Faculty of Pharmacy and Food Sciences and Institute of Biomedicine (IBUB) Universitat de Barcelona Av. Joan XXIII, 27–31 08028 Barcelona Spain
| | - Michal Babiak
- CEITEC Masaryk University University Campus Bohunice 62500 Brno Czech Republic
| | - Jiri Novacek
- CEITEC Masaryk University University Campus Bohunice 62500 Brno Czech Republic
| | - Frederick Hartung
- IUF Leibniz Research Institute for Environmental Medicine 40225 Düsseldorf Germany
| | - Katharina M. Rolfes
- IUF Leibniz Research Institute for Environmental Medicine 40225 Düsseldorf Germany
| | | | - Rodolfo Lavilla
- Laboratory of Medicinal Chemistry Faculty of Pharmacy and Food Sciences and Institute of Biomedicine (IBUB) Universitat de Barcelona Av. Joan XXIII, 27–31 08028 Barcelona Spain
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10
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Ghashghaei O, Pedrola M, Seghetti F, Martin VV, Zavarce R, Babiak M, Novacek J, Hartung F, Rolfes KM, Haarmann‐Stemmann T, Lavilla R. Extended Multicomponent Reactions with Indole Aldehydes: Access to Unprecedented Polyheterocyclic Scaffolds, Ligands of the Aryl Hydrocarbon Receptor. Angew Chem Int Ed Engl 2020; 60:2603-2608. [DOI: 10.1002/anie.202011253] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 09/30/2020] [Indexed: 12/13/2022]
Affiliation(s)
- Ouldouz Ghashghaei
- Laboratory of Medicinal Chemistry Faculty of Pharmacy and Food Sciences and Institute of Biomedicine (IBUB) Universitat de Barcelona Av. Joan XXIII, 27–31 08028 Barcelona Spain
| | - Marina Pedrola
- Laboratory of Medicinal Chemistry Faculty of Pharmacy and Food Sciences and Institute of Biomedicine (IBUB) Universitat de Barcelona Av. Joan XXIII, 27–31 08028 Barcelona Spain
| | - Francesca Seghetti
- Laboratory of Medicinal Chemistry Faculty of Pharmacy and Food Sciences and Institute of Biomedicine (IBUB) Universitat de Barcelona Av. Joan XXIII, 27–31 08028 Barcelona Spain
| | - Victor V. Martin
- Laboratory of Medicinal Chemistry Faculty of Pharmacy and Food Sciences and Institute of Biomedicine (IBUB) Universitat de Barcelona Av. Joan XXIII, 27–31 08028 Barcelona Spain
| | - Ricardo Zavarce
- Laboratory of Medicinal Chemistry Faculty of Pharmacy and Food Sciences and Institute of Biomedicine (IBUB) Universitat de Barcelona Av. Joan XXIII, 27–31 08028 Barcelona Spain
| | - Michal Babiak
- CEITEC Masaryk University University Campus Bohunice 62500 Brno Czech Republic
| | - Jiri Novacek
- CEITEC Masaryk University University Campus Bohunice 62500 Brno Czech Republic
| | - Frederick Hartung
- IUF Leibniz Research Institute for Environmental Medicine 40225 Düsseldorf Germany
| | - Katharina M. Rolfes
- IUF Leibniz Research Institute for Environmental Medicine 40225 Düsseldorf Germany
| | | | - Rodolfo Lavilla
- Laboratory of Medicinal Chemistry Faculty of Pharmacy and Food Sciences and Institute of Biomedicine (IBUB) Universitat de Barcelona Av. Joan XXIII, 27–31 08028 Barcelona Spain
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11
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Abe T, Kosaka Y, Kawasaki T, Ohata Y, Yamashiro T, Yamada K. Revisiting 2-Alkoxy-3-bromoindolines: Control C-2 vs. C-3 Elimination for Regioselective Synthesis of Alkoxyindoles. Chem Pharm Bull (Tokyo) 2020; 68:555-558. [DOI: 10.1248/cpb.c20-00135] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Takumi Abe
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido
| | - Yuta Kosaka
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido
| | - Takaaki Kawasaki
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido
| | - Yuki Ohata
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido
| | - Toshiki Yamashiro
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido
| | - Koji Yamada
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido
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12
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Klein-Júnior LC, Cretton S, Vander Heyden Y, Gasper AL, Nejad-Ebrahimi S, Christen P, Henriques AT. Bioactive Azepine-Indole Alkaloids from Psychotria nemorosa. JOURNAL OF NATURAL PRODUCTS 2020; 83:852-863. [PMID: 32150413 DOI: 10.1021/acs.jnatprod.9b00469] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Phytochemical investigation of the alkaloid extract of the aerial parts of Psychotria nemorosa led to the isolation and characterization of 10 azepine-indole alkaloids, i.e., cimitrypazepine (1), fargesine (2), nemorosines A (3), and B (12), nemorosinosides A-F (4-9), as well as two β-carboline derivatives, 10-hydroxyisodolichantoside (10) and 10-hydroxydolichantoside (11), an isoxazole alkaloid, nemorosinoside G (13), serotonin (14), bufotenine (15), and (S)-gentianol (16). Compounds 3-13 have not yet been described. These compounds were isolated by semipreparative HPLC, and their structures were determined by means of HRMS, NMR, and ECD measurements. In addition, the monoamine oxidase-A (MAO-A), MAO-B, acetylcholinesterase (AChE), and butyrylcholinesterase (BChE) inhibitory activities were evaluated. Alkaloids 1-3 inhibited the MAO-A activity with IC50 values of 1.4, 1.4, and 0.9 μM, respectively.
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Affiliation(s)
- Luiz C Klein-Júnior
- Laboratory of Pharmacognosy and Quality Control of Phytomedicines, Faculty of Pharmacy, Universidade Federal do Rio Grande do Sul-UFRGS, 90610-000 Porto Alegre/RS Brazil
- Department of Analytical Chemistry, Applied Chemometrics and Molecular Modelling, Center for Pharmaceutical Research (CePhaR), Vrije Universiteit Brussel-VUB, B-1090 Brussels, Belgium
- School of Health Sciences, Universidade do Vale do Itajaí-UNIVALI, 88302-901, Itajaí/SC Brazil
| | - Sylvian Cretton
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, 1211 Geneva 4, Switzerland
| | - Yvan Vander Heyden
- Department of Analytical Chemistry, Applied Chemometrics and Molecular Modelling, Center for Pharmaceutical Research (CePhaR), Vrije Universiteit Brussel-VUB, B-1090 Brussels, Belgium
| | - André L Gasper
- Herbarium Dr. Roberto Miguel Klein, Department of Natural Sciences, Universidade Regional de Blumenau-FURB, 89030-903 Blumenau/SC Brazil
| | - Samad Nejad-Ebrahimi
- Department of Phytochemistry, Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, Evin 1983963113, Tehran Iran
| | - Philippe Christen
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, 1211 Geneva 4, Switzerland
| | - Amélia T Henriques
- Laboratory of Pharmacognosy and Quality Control of Phytomedicines, Faculty of Pharmacy, Universidade Federal do Rio Grande do Sul-UFRGS, 90610-000 Porto Alegre/RS Brazil
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13
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Wani IA, Goswami G, Sk S, Mal A, Sayyad M, Ghorai MK. A synthetic route to 1,4-disubstituted tetrahydro-β-carbolines and tetrahydropyranoindoles via ring-opening/Pictet–Spengler reaction of aziridines and epoxides with indoles/aldehydes. Org Biomol Chem 2020; 18:272-287. [DOI: 10.1039/c9ob02098e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A route to 1,4-disubstituted tetrahydro-β-carbolines and tetrahydropyrano[3,4-b]indoles in high yields and stereoselectivity via SN2-type ring opening/Pictet–Spengler reaction of aziridines and epoxides with indoles is described.
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Affiliation(s)
| | - Gaurav Goswami
- Department of Chemistry
- Indian Institute of Technology Kanpur
- India
| | - Sahid Sk
- Department of Chemistry
- Indian Institute of Technology Kanpur
- India
| | - Abhijit Mal
- Department of Chemistry
- Indian Institute of Technology Kanpur
- India
| | | | - Manas K. Ghorai
- Department of Chemistry
- Indian Institute of Technology Kanpur
- India
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14
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Abe T, Hirao S, Kitamori M, Itoh T, Chiba Y. A Mild Bischler–Napieralski-Type Cyclization of Trichloromethyl Carbamates for the Synthesis of β-Carbolinones. HETEROCYCLES 2020. [DOI: 10.3987/com-19-s(f)19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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15
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Abe T, Itoh T, Terasaki M. Total Synthesis of Fontanesine B and Its Isomer: Their Antiproliferative Activity against Human Colorectal Cancer Cells. Helv Chim Acta 2019. [DOI: 10.1002/hlca.201900116] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Takumi Abe
- Faculty of Pharmaceutical SciencesHealth Sciences University of Hokkaido, Ishikari-Tobetsu Hokkaido 061-0293 Japan
| | - Tomoki Itoh
- Faculty of Pharmaceutical SciencesHealth Sciences University of Hokkaido, Ishikari-Tobetsu Hokkaido 061-0293 Japan
| | - Masaru Terasaki
- Faculty of Pharmaceutical SciencesHealth Sciences University of Hokkaido, Ishikari-Tobetsu Hokkaido 061-0293 Japan
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16
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Krüzselyi D, Vetter J, Ott PG, Darcsi A, Béni S, Gömöry Á, Drahos L, Zsila F, Móricz ÁM. Isolation and structural elucidation of a novel brunnein-type antioxidant β-carboline alkaloid from Cyclocybe cylindracea. Fitoterapia 2019; 137:104180. [PMID: 31150766 DOI: 10.1016/j.fitote.2019.104180] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 05/25/2019] [Accepted: 05/27/2019] [Indexed: 11/30/2022]
Abstract
Effect-directed isolation of free radical scavengers from the methanol extract of the freeze-dried fruiting bodies of the cultivated basidiomycetous mushroom, black poplar (Cyclocybe cylindracea), yielded a β-carboline alkaloid. Its structure was determined based on ESI-TOF-MS/MS, NMR and circular dichroism spectra by comparison with published data. The compound, identified as the C1-S diastereomer of brunnein B, exhibited explicit radical scavenging activity (EC50 = 119.1 ± 1.2 μg/mL). The quantity of the active component was determined with HPLC-MS in the fruiting body (36.2 ± 2.8 ng/g DW, dry weight) and its different tissues such as peel (94.7 ± 1.9 ng/g DW), inner cap (90.5 ± 1.3 ng/g DW), gills (71.5 ± 0.6 ng/g DW), and stipe (162.2 ± 1.7 ng/g DW). It is a β-carboline alkaloid that was not reported previously.
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Affiliation(s)
- Dániel Krüzselyi
- Plant Protection Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, Herman O. Str. 15, 1022 Budapest, Hungary
| | - János Vetter
- Department of Botany, University of Veterinary Science, Rottenbiller Str. 50, 1077 Budapest, Hungary
| | - Péter G Ott
- Plant Protection Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, Herman O. Str. 15, 1022 Budapest, Hungary
| | - András Darcsi
- Department of Pharmacognosy, Semmelweis University, Üllői Str. 26, 1085 Budapest, Hungary
| | - Szabolcs Béni
- Department of Pharmacognosy, Semmelweis University, Üllői Str. 26, 1085 Budapest, Hungary
| | - Ágnes Gömöry
- Institute of Organic Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok Boulevard 2, 1117 Budapest, Hungary
| | - László Drahos
- Institute of Organic Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok Boulevard 2, 1117 Budapest, Hungary
| | - Ferenc Zsila
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok Boulevard 2, 1117 Budapest, Hungary
| | - Ágnes M Móricz
- Plant Protection Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, Herman O. Str. 15, 1022 Budapest, Hungary.
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17
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Rajasekar S, Anbarasan P. One-Pot Transannulation of N-Sulfonyl-1,2,3-triazoles to Dihydro-β-carbolines and Dihydroisoquinolines via Rhodium-Catalyzed C–H Insertion-cum-Base-Mediated Aza-Michael Reaction. J Org Chem 2019; 84:7747-7761. [DOI: 10.1021/acs.joc.9b00644] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Shanmugam Rajasekar
- 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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18
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Abe T, Aoyama S, Ohmura M, Taniguchi M, Yamada K. Revisiting Furodiindolines: One-Pot Synthesis of Furodiindolines Using Indole 2,3-Epoxide Surrogates and Their Synthetic Applications. Org Lett 2019; 21:3367-3371. [PMID: 30997809 DOI: 10.1021/acs.orglett.9b01108] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Furodiindolines have emerged as versatile intermediates in various transformations, which are easily obtained from indole 2,3-epoxide surrogates via a one-pot procedure and allowed access to heterocyclic compounds with structural diversity and complexity. Four types of transformations from the furodiindolines have been achieved: (i) dehydrative rearrangement to afford 2,3'-biindoles, (ii) hydrolysis/cyclization to give 3,4-disubstituted quinolines, (iii) ring-opening/cyclization to give pyrroloindolines, and (iv) aminal cleavage to give a 3,3-disubstituted 2-oxindole.
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Affiliation(s)
- Takumi Abe
- Faculty of Pharmaceutical Sciences , Health Sciences University of Hokkaido , Ishikari-tobetsu, Hokkaido 0610293 , Japan
| | - Sakura Aoyama
- Faculty of Pharmaceutical Sciences , Health Sciences University of Hokkaido , Ishikari-tobetsu, Hokkaido 0610293 , Japan
| | - Masami Ohmura
- Faculty of Pharmaceutical Sciences , Health Sciences University of Hokkaido , Ishikari-tobetsu, Hokkaido 0610293 , Japan
| | - Masato Taniguchi
- Faculty of Pharmaceutical Sciences , Health Sciences University of Hokkaido , Ishikari-tobetsu, Hokkaido 0610293 , Japan
| | - Koji Yamada
- Faculty of Pharmaceutical Sciences , Health Sciences University of Hokkaido , Ishikari-tobetsu, Hokkaido 0610293 , Japan
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19
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20
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Abe T, Kosaka Y, Asano M, Harasawa N, Mishina A, Nagasue M, Sugimoto Y, Katakawa K, Sueki S, Anada M, Yamada K. Direct C4-Benzylation of Indoles via Tandem Benzyl Claisen/Cope Rearrangements. Org Lett 2019; 21:826-829. [DOI: 10.1021/acs.orglett.8b04120] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Takumi Abe
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari-tobetsu, Hokkaido 061-0293, Japan
| | - Yuta Kosaka
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari-tobetsu, Hokkaido 061-0293, Japan
| | - Miku Asano
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari-tobetsu, Hokkaido 061-0293, Japan
| | - Natsuki Harasawa
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari-tobetsu, Hokkaido 061-0293, Japan
| | - Akane Mishina
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari-tobetsu, Hokkaido 061-0293, Japan
| | - Misato Nagasue
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari-tobetsu, Hokkaido 061-0293, Japan
| | - Yuri Sugimoto
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari-tobetsu, Hokkaido 061-0293, Japan
| | - Kazuaki Katakawa
- Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi, Nishitokyo-shi 202-8585, Japan
| | - Shunsuke Sueki
- Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi, Nishitokyo-shi 202-8585, Japan
| | - Masahiro Anada
- Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi, Nishitokyo-shi 202-8585, Japan
| | - Koji Yamada
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari-tobetsu, Hokkaido 061-0293, Japan
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21
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Abstract
Covering: January to December 2017This review covers the literature published in 2017 for marine natural products (MNPs), with 740 citations (723 for the period January to December 2017) referring to compounds isolated from marine microorganisms and phytoplankton, green, brown and red algae, sponges, cnidarians, bryozoans, molluscs, tunicates, echinoderms, mangroves and other intertidal plants and microorganisms. The emphasis is on new compounds (1490 in 477 papers for 2017), together with the relevant biological activities, source organisms and country of origin. Reviews, biosynthetic studies, first syntheses, and syntheses that led to the revision of structures or stereochemistries, have been included. Geographic distributions of MNPs at a phylogenetic level are reported.
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Affiliation(s)
- Anthony R Carroll
- School of Environment and Science, Griffith University, Gold Coast, Australia. and Griffith Institute for Drug Discovery, Griffith University, Brisbane, Australia
| | - Brent R Copp
- School of Chemical Sciences, University of Auckland, Auckland, New Zealand
| | - Rohan A Davis
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, Australia
| | - Robert A Keyzers
- Centre for Biodiscovery, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, New Zealand
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23
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Itoh T, Chiba Y, Kawaguchi S, Koitaya Y, Yoneta Y, Yamada K, Abe T. Total synthesis of pyrano[3,2- e]indole alkaloid fontanesine B by a double cyclization strategy. RSC Adv 2019; 9:10420-10424. [PMID: 35520921 PMCID: PMC9062488 DOI: 10.1039/c9ra02321f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Accepted: 03/27/2019] [Indexed: 12/01/2022] Open
Abstract
The regioselective synthesis of pyrano[3,2-e]indole alkaloid fontanesine B by two different cyclizations is described. The complete regioselectivity is controlled by the C4 Pictet–Spengler cyclization, in which an iminium ion acts as a transient directing (TDG) group. Furthermore, carbolines were constructed by a new Bischler–Napieralski-type cyclization, in which an unprecedented trichloromethyl carbamate serves as a reactive group. The regioselective synthesis of pyrano[3,2-e]indole alkaloid fontanesine B have been accomplished by C4 Pictet–Spengler cyclization and Bischler–Napieralski-type cyclization of a trichloromethyl carbamate.![]()
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Affiliation(s)
- Tomoki Itoh
- Faculty of Pharmaceutical Sciences
- Health Sciences University of Hokkaido
- Hokkaido 0610293
- Japan
| | - Yuusuke Chiba
- Faculty of Pharmaceutical Sciences
- Health Sciences University of Hokkaido
- Hokkaido 0610293
- Japan
| | - Shunsuke Kawaguchi
- Faculty of Pharmaceutical Sciences
- Health Sciences University of Hokkaido
- Hokkaido 0610293
- Japan
| | - Yuki Koitaya
- Faculty of Pharmaceutical Sciences
- Health Sciences University of Hokkaido
- Hokkaido 0610293
- Japan
| | - Yuuma Yoneta
- Faculty of Pharmaceutical Sciences
- Health Sciences University of Hokkaido
- Hokkaido 0610293
- Japan
| | - Koji Yamada
- Faculty of Pharmaceutical Sciences
- Health Sciences University of Hokkaido
- Hokkaido 0610293
- Japan
| | - Takumi Abe
- Faculty of Pharmaceutical Sciences
- Health Sciences University of Hokkaido
- Hokkaido 0610293
- Japan
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24
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Uredi D, Motati DR, Watkins EB. A Unified Strategy for the Synthesis of β-Carbolines, γ-Carbolines, and Other Fused Azaheteroaromatics under Mild, Metal-Free Conditions. Org Lett 2018; 20:6336-6339. [PMID: 30272985 DOI: 10.1021/acs.orglett.8b02441] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient, unified approach for the synthesis of β-carbolines, γ-carbolines, and other fused azaheteroaromatics has been realized under metal-free conditions, from propargylic amines and (hetero)aromatic aldehydes. This unified strategy provides β- and γ-carbolines as well as a range of fused azaheteroaromatics with a broad substrate scope and excellent functional group compatibility. The formal synthesis of oxopropalines D and G has been achieved on gram scale (3a), in a one-pot reaction from commercially available materials (previous shortest reported route to 3a was 5 steps). NMR studies of the conversion of imine intermediate 3aa to β-carboline 3a were conducted and revealed that the reaction proceeded through an allene intermediate.
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Affiliation(s)
- Dilipkumar Uredi
- Department of Pharmaceutical Sciences, College of Pharmacy , Union University , Jackson , Tennessee 38305 , United States
| | - Damoder Reddy Motati
- Department of Pharmaceutical Sciences, College of Pharmacy , Union University , Jackson , Tennessee 38305 , United States
| | - E Blake Watkins
- Department of Pharmaceutical Sciences, College of Pharmacy , Union University , Jackson , Tennessee 38305 , United States
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25
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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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26
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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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27
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Rahman MT, Cook JM. Unprecedented Stereocontrol in the Synthesis of 1,2,3-Trisubstituted Tetrahydro-β-carbolines through an Asymmetric Pictet-Spengler Reaction towards Sarpagine-Type Indole Alkaloids. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800600] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- M. Toufiqur Rahman
- Department of Chemistry and Biochemistry; University of Wisconsin-Milwaukee; 3210 N Cramer Street 53211 Milwaukee WI- USA
| | - James M. Cook
- Department of Chemistry and Biochemistry; University of Wisconsin-Milwaukee; 3210 N Cramer Street 53211 Milwaukee WI- USA
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28
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Abe T, Shimizu H, Takada S, Tanaka T, Yoshikawa M, Yamada K. Double “Open and Shut” Transformation of γ-Carbolines Triggered by Ammonium Salts: One-Pot Synthesis of Multiheterocyclic Compounds. Org Lett 2018; 20:1589-1592. [DOI: 10.1021/acs.orglett.8b00332] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Takumi Abe
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari-tobetsu, Hokkaido 0610293, Japan
| | - Haruka Shimizu
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari-tobetsu, Hokkaido 0610293, Japan
| | - Shiori Takada
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari-tobetsu, Hokkaido 0610293, Japan
| | - Takahiro Tanaka
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari-tobetsu, Hokkaido 0610293, Japan
| | - Mai Yoshikawa
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari-tobetsu, Hokkaido 0610293, Japan
| | - Koji Yamada
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari-tobetsu, Hokkaido 0610293, Japan
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29
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Abe T, Yamada K. Dehydrative Mannich-Type Reaction for the Synthesis of Azepinobisindole Alkaloid Iheyamine A. Org Lett 2018; 20:1469-1472. [DOI: 10.1021/acs.orglett.8b00330] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Takumi Abe
- Faculty of Pharmaceutical
Sciences, Health Sciences University of Hokkaido, Ishikari-tobetsu, Hokkaido 0610293, Japan
| | - Koji Yamada
- Faculty of Pharmaceutical
Sciences, Health Sciences University of Hokkaido, Ishikari-tobetsu, Hokkaido 0610293, Japan
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30
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31
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Abstract
This review discusses various biological and chemical aspects of the non-monoterpenoid azepinoindole class of alkaloids, including their isolation, biosynthesis and total synthesis.
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Affiliation(s)
- Ashley C. Lindsay
- School of Chemical Sciences
- University of Auckland
- Auckland
- New Zealand
| | - Se Hun Kim
- School of Chemical Sciences
- University of Auckland
- Auckland
- New Zealand
| | - Jonathan Sperry
- School of Chemical Sciences
- University of Auckland
- Auckland
- New Zealand
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32
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Tang S, Wang J, Xiong Z, Xie Z, Li D, Huang J, Zhu Q. Palladium-Catalyzed Imidoylative Cyclization of Tryptophan-Derived Isocyanides: Access to β-Carbolines. Org Lett 2017; 19:5577-5580. [DOI: 10.1021/acs.orglett.7b02725] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Shi Tang
- State Key Laboratory of Respiratory
Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy
of Sciences, University of Chinese Academy of Sciences, 190 Kaiyuan
Avenue, Guangzhou 510530, China
| | - Jian Wang
- State Key Laboratory of Respiratory
Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy
of Sciences, University of Chinese Academy of Sciences, 190 Kaiyuan
Avenue, Guangzhou 510530, China
| | - Zhuang Xiong
- State Key Laboratory of Respiratory
Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy
of Sciences, University of Chinese Academy of Sciences, 190 Kaiyuan
Avenue, Guangzhou 510530, China
| | - Zeqiang Xie
- State Key Laboratory of Respiratory
Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy
of Sciences, University of Chinese Academy of Sciences, 190 Kaiyuan
Avenue, Guangzhou 510530, China
| | - Dengke Li
- State Key Laboratory of Respiratory
Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy
of Sciences, University of Chinese Academy of Sciences, 190 Kaiyuan
Avenue, Guangzhou 510530, China
| | - Jinbo Huang
- State Key Laboratory of Respiratory
Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy
of Sciences, University of Chinese Academy of Sciences, 190 Kaiyuan
Avenue, Guangzhou 510530, China
| | - Qiang Zhu
- State Key Laboratory of Respiratory
Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy
of Sciences, University of Chinese Academy of Sciences, 190 Kaiyuan
Avenue, Guangzhou 510530, China
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33
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Abe T, Suzuki T, Anada M, Matsunaga S, Yamada K. 2-Hydroxyindoline-3-triethylammonium Bromide: A Reagent for Formal C3-Electrophilic Reactions of Indoles. Org Lett 2017; 19:4275-4278. [DOI: 10.1021/acs.orglett.7b01940] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Takumi Abe
- Faculty
of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari-tobetsu, Hokkaido 0610293, Japan
| | - Takuro Suzuki
- Faculty
of Pharmaceutical Sciences, Hokkaido University, Sapporo 0600812, Japan
| | - Masahiro Anada
- Faculty
of Pharmaceutical Sciences, Hokkaido University, Sapporo 0600812, Japan
| | - Shigeki Matsunaga
- Faculty
of Pharmaceutical Sciences, Hokkaido University, Sapporo 0600812, Japan
| | - Koji Yamada
- Faculty
of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari-tobetsu, Hokkaido 0610293, Japan
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34
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Urmode TD, Dawange MA, Shinde VS, Kusurkar RS. Synthesis of spiroindolone scaffolds by Pictet-Spengler spirocyclisation using β-cyclodextrin-SO3H as a recyclable catalyst. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.05.089] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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