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Yorimoto S, Tsubouchi A, Mizoguchi H, Oikawa H, Tsunekawa Y, Ichino T, Maeda S, Oguri H. Zn(OTf) 2-mediated annulations of N-propargylated tetrahydrocarbolines: divergent synthesis of four distinct alkaloidal scaffolds. Chem Sci 2019; 10:5686-5698. [PMID: 31293753 PMCID: PMC6568280 DOI: 10.1039/c9sc01507h] [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: 04/24/2019] [Indexed: 12/19/2022] Open
Abstract
![]() Experimental and computational studies gained insights into Zn(OTf)2-mediated annulations and allowed programmable synthesis of four distinct alkaloidal scaffolds.
Intramolecular hydroarylations of N-propargylated tetrahydrocarbolines were efficiently mediated using a unique combination of Zn(OTf)2 with t-BuOH under neutral conditions. Use of the artificial force induced reaction method in the global reaction route mapping strategy provided insights into the Zn(OTf)2-mediated hydroarylations and the associated intriguing solvent effects of t-BuOH facilitating a protodezincation process without a Brønsted acid activator. We systematically implemented three distinct hydroarylations as well as an unanticipated α-alkenylation of a carbonyl group to obtain the four alkaloidal scaffolds 2–4, and 18. Zn(OTf)2-mediated annulation of 1c proceeded through kinetic formation of the spiroindole 3c followed by an alkenyl shift and concomitant retro-Mannich-type fragmentation to furnish azepino[4,5-b]indole 2 framework. Substituents on substrate 1 in the vicinity of the reaction sites substantially affected the mode of the divergent annulations. Judicious choices of the substituents, solvent and reaction conditions enabled programmable divergent synthesis of the four distinct skeletons.
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Affiliation(s)
- Sadaiwa Yorimoto
- Department of Applied Chemistry , Graduate School of Engineering , Tokyo University of Agriculture and Technology , 2-24-16 Nakacho , Koganei , Tokyo 184-8588 , Japan .
| | - Akira Tsubouchi
- Department of Applied Chemistry , Graduate School of Engineering , Tokyo University of Agriculture and Technology , 2-24-16 Nakacho , Koganei , Tokyo 184-8588 , Japan .
| | - Haruki Mizoguchi
- Graduate School of Natural Science and Technology , Okayama University , 3-1-1 Tsushimanaka, Kita-ku , Okayama 700-8530 , Japan
| | - Hideaki Oikawa
- Department of Chemistry , Faculty of Science , Hokkaido University , Kita-ku Kita 10 Jo Nishi 8 Chome , Sapporo 060-0810 , Japan .
| | - Yoshiaki Tsunekawa
- Department of Chemistry , Faculty of Science , Hokkaido University , Kita-ku Kita 10 Jo Nishi 8 Chome , Sapporo 060-0810 , Japan .
| | - Tomoya Ichino
- Department of Chemistry , Faculty of Science , Hokkaido University , Kita-ku Kita 10 Jo Nishi 8 Chome , Sapporo 060-0810 , Japan .
| | - Satoshi Maeda
- Department of Chemistry , Faculty of Science , Hokkaido University , Kita-ku Kita 10 Jo Nishi 8 Chome , Sapporo 060-0810 , Japan . .,Institute for Chemical Reaction Design and Discovery (WPI-ICReDD) , Hokkaido University , Sapporo 001-0021 , Japan
| | - Hiroki Oguri
- Department of Applied Chemistry , Graduate School of Engineering , Tokyo University of Agriculture and Technology , 2-24-16 Nakacho , Koganei , Tokyo 184-8588 , Japan .
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Affiliation(s)
- Marino Petrini
- School of Science and Technology, Chemistry Division Università di Camerino Via S. Agostino, 1. 62032 Camerino Italy
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Boyarskiy VP, Ryabukhin DS, Bokach NA, Vasilyev AV. Alkenylation of Arenes and Heteroarenes with Alkynes. Chem Rev 2016; 116:5894-986. [DOI: 10.1021/acs.chemrev.5b00514] [Citation(s) in RCA: 319] [Impact Index Per Article: 39.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vadim P. Boyarskiy
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya nab., 7/9, Saint Petersburg 199034, Russia
| | - Dmitry S. Ryabukhin
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya nab., 7/9, Saint Petersburg 199034, Russia
- Department of Chemistry, Saint Petersburg State Forest Technical University, Institutsky per. 5, Saint Petersburg 194021, Russia
| | - Nadezhda A. Bokach
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya nab., 7/9, Saint Petersburg 199034, Russia
| | - Aleksander V. Vasilyev
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya nab., 7/9, Saint Petersburg 199034, Russia
- Department of Chemistry, Saint Petersburg State Forest Technical University, Institutsky per. 5, Saint Petersburg 194021, Russia
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Oguri H. Biomimetic Assembly Lines Producing Natural Product Analogs: Strategies from a Versatile Manifold to Skeletally Diverse Scaffolds. CHEM REC 2016; 16:652-66. [DOI: 10.1002/tcr.201500213] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2015] [Indexed: 01/06/2023]
Affiliation(s)
- Hiroki Oguri
- Division of Applied Chemistry Graduate School of Engineering; Tokyo University of Agriculture and Technology; 2-24-16 Nakacho Koganei Tokyo 184-8588 Japan
- JST PRESTO; 4-1-8 Honcho Kawaguchi Saitama 332-0012 Japan
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Oguri H. Biomimetic Assembly Lines Producing Natural Product Analogs: Strategies from a Versatile Manifold to Skeletally Diverse Scaffolds. CHEM REC 2016. [DOI: 10.1002/tcr.201201600213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Hiroki Oguri
- Division of Applied Chemistry Graduate School of Engineering; Tokyo University of Agriculture and Technology; 2-24-16 Nakacho Koganei Tokyo 184-8588 Japan
- JST PRESTO; 4-1-8 Honcho Kawaguchi Saitama 332-0012 Japan
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Mizoguchi H, Oguri H. Development of an Artificial Assembly Line Generating Skeletally Diverse Indole Alkaloids Inspired by Biogenetic Strategy. J SYN ORG CHEM JPN 2016. [DOI: 10.5059/yukigoseikyokaishi.74.854] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Hiroki Oguri
- Division of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology
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Yamamoto H, Yamasaki N, Hamauchi H, Shiomi S, Sasaki I, Seyama K, Mima Y, Nakano M, Kawakami T, Miyataka H, Kasai Y, Imagawa H. A heterogeneous mercury salt catalyst stabilized by m-carbaborane. RSC Adv 2015. [DOI: 10.1039/c5ra21007k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel hetergeneous mercury salt catalyst stabilized by m-carbaborane can be used and reused for various chemical reactions without leaching the metal.
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Nagase Y, Miyamura T, Inoue K, Tsuchimoto T. Indium-catalyzed Annulation of Indoles with Ethyl (2-Ethynylaryl)methyl Carbonates: Synthesis and Photoluminescent Properties of Aryl- and Heteroaryl[b]carbazoles. CHEM LETT 2013. [DOI: 10.1246/cl.130402] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Yuta Nagase
- Department of Applied Chemistry, School of Science and Technology, Meiji University
| | - Takuhiro Miyamura
- Department of Applied Chemistry, School of Science and Technology, Meiji University
| | - Kensuke Inoue
- Department of Applied Chemistry, School of Science and Technology, Meiji University
| | - Teruhisa Tsuchimoto
- Department of Applied Chemistry, School of Science and Technology, Meiji University
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Mobin SM, Mishra V, Ram P, Birla A, Mathur P. Formation of a 1D-polymeric chain of Hg building blocks through C-C coupling under ambient conditions. Dalton Trans 2013; 42:10687-9. [PMID: 23793221 DOI: 10.1039/c3dt51213d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel C-C coupled 1D-polymeric chain (1) is obtained by reaction of HgCl2 and hmp-H (2-(2-hydroxymethyl pyridine)) (1 : 1) in MeOH at ambient temperature. However, a new class of μ-oxo and μ-chloro bridged polymers (2) has been obtained by altering the metal : ligand ratio to 1 : 2.
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Affiliation(s)
- Shaikh M Mobin
- Discipline of Chemistry, School of Basic Sciences, Indian Institute of Technology Indore, Khandwa Road, Indore 452017, India.
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