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Schifferer L, García Mancheño O. Metal‐ and Solvent‐Free, One‐Pot Synthesis of 3‐Unsubstituted Benzoindolizines. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Lukas Schifferer
- Organic Chemistry Institute Münster University Corrensstraße 36 48149 Münster Germany
| | - Olga García Mancheño
- Organic Chemistry Institute Münster University Corrensstraße 36 48149 Münster Germany
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2
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Tang E, Mao D, Sun Q, Liao M, Li Y, Liu S. One-Pot Synthesis of Pyrrolo[2,1-α]isoquinolines via Tandem Reactions of Vinylselenonium Salt, 2-Bromoethanones, and Isoquinoline. HETEROCYCLES 2019. [DOI: 10.3987/com-19-14162] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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3
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Li Y, Yang B, Sun Y, Wang H, Li H, Fang S, Niu X, Ma C. A metal-free tandem cycloaddition strategy for the synthesis of indolizines from pyridine derivatives and γ-bromo-crotonates under mild conditions. RSC Adv 2013. [DOI: 10.1039/c3ra43613f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
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4
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Kakehi A, Itoh K, Suga H, Yamaguchi N, Abe T, Yuda Y, Katsumata H. Molecular Recognition of 2-(Arylmethylthio)indolizine Derivatives through an Intramolecular Arene-π (Cation) Interaction. HETEROCYCLES 2012. [DOI: 10.3987/com-11-s(p)50] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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5
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6
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Niyomura O, Yamaguchi Y, Tamura S, Minoura M, Okamoto Y. Reaction of 2-(Aminomethyl)pyridine with Selenium Dioxide: Synthesis and Structure of Selenium-bridged Imidazo[1,5-a]pyridine Derivatives. CHEM LETT 2011. [DOI: 10.1246/cl.2011.449] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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7
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Fu WF, Jia LF, Mu WH, Gan X, Zhang JB, Liu PH, Cao QY, Zhang GJ, Quan L, Lv XJ, Xu QQ. Synthesis, Characterization, Photoinduced Isomerization, and Spectroscopic Properties of Vinyl-1,8-naphthyridine Derivatives and Their Copper(I) Complexes. Inorg Chem 2010; 49:4524-33. [PMID: 20408579 DOI: 10.1021/ic100094y] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wen-Fu Fu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, HKU-CAS Joint Laboratory on New Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Peking 100190, China
- College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650092, China
| | - Lin-Fang Jia
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, HKU-CAS Joint Laboratory on New Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Peking 100190, China
| | - Wei-Hua Mu
- College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650092, China
| | - Xin Gan
- College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650092, China
| | - Jia-Bing Zhang
- College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650092, China
| | - Ping-Hua Liu
- College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650092, China
| | - Qian-Yong Cao
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, HKU-CAS Joint Laboratory on New Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Peking 100190, China
| | - Gui-Ju Zhang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, HKU-CAS Joint Laboratory on New Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Peking 100190, China
| | - Li Quan
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, HKU-CAS Joint Laboratory on New Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Peking 100190, China
| | - Xiao-Jun Lv
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, HKU-CAS Joint Laboratory on New Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Peking 100190, China
| | - Quan-Qing Xu
- College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650092, China
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8
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Liu Y, Zhang Y, Shen YM, Hu HW, Xu JH. Regioselective synthesis of 3-acylindolizines and benzo- analogues via 1,3-dipolar cycloadditions of N-ylides with maleic anhydride. Org Biomol Chem 2010; 8:2449-56. [PMID: 20448905 DOI: 10.1039/c000277a] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
3-Acylindolizines (5a-5f) and their benzo- analogues 1-acylpyrrolo[1,2-a]quinolines (6a-6f) and 1-acylpyrrolo[2,1-a]isoquinolines (7a-7i) are regioselectively synthesized by a convenient one pot reaction of the corresponding pyridinium (quinolinium, isoquinolinium) ylide with maleic anhydride (MA) in the presence of the mild oxidant tetrakispyridinecobalt(ii) dichromate (TPCD). These reactions proceed via a tandem reaction sequence of 1,3-dipolar cycloaddition of azomethine ylide with MA, anhydride hydrolysis and oxidative bisdecarboxylation of the primary cycloadducts followed by dehydrogenative aromatization of the dihydroindolizines. TPCD serves as both decarboxylation and dehydrogenation reagent in the reactions. These results show that TPCD is a promising new reagent for bisdecarboxylation of aliphatic carboxylates.
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Affiliation(s)
- Yun Liu
- Institute of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, PR China
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9
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Kakehi A, Suga H, Okumura Y, Itoh K, Hatayama S, Kubo D, Kobayashi K. Preparation of new nitrogen-bridged heterocycles. 69. Synthesis and Reaction of 1-(α-Hydroxybenzyl)thieno [3,4-b] indolizine Derivatives. HETEROCYCL COMMUN 2010. [DOI: 10.1515/hc.2010.16.1.53] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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10
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Kakehi A, Suga H, Okumura Y, Shinohara M, Kako T, Sekiguchi T, Shiro M. Preparation of new nitrogen-bridged heterocycles 67. syntheses of alpha,alpha'-Bis[(thieno[3,4-b]indolizin-3-yl)thio]-o-, m-, and p-xylene derivatives and their conformational structures. Chem Pharm Bull (Tokyo) 2009; 57:1385-90. [PMID: 19952449 DOI: 10.1248/cpb.57.1385] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The alkaline treatment and dehydrogenation of pyridinium salts, formed from the S-alkylations of 3-(1-pyridinio)thiophene-2-thiolates with alpha,alpha-dibromo-o-, m-, or p-xylene, provided the corresponding alpha,alpha'-bis[(thieno[3,4-b]indolizin-3-yl)thio]-o-, m-, and p-xylene derivatives in low to good yields. Both (1)H-NMR and UV-Vis spectra of these products supported distinctly the predominance of the gauche-gauche conformation in relation to the two sulfide linkages as the spacer in these molecules. On the other hand, the X-ray analyses indicated the expected gauche-gauche conformation for the m- and the p-xylene derivatives, but the anti-anti one for the o-xylene derivative.
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Affiliation(s)
- Akikazu Kakehi
- Department of Chemistry and Material Engineering, Shinshu University, Wakasato, Nagano, Japan. xkakehi@ shinshu-u.ac.jp
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11
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Tsutsui K, Koizumi TA, Tanaka K, Hayashi H. Anion-dependent selective formation of intermolecular non-covalent bonds. J Mol Struct 2007. [DOI: 10.1016/j.molstruc.2006.06.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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12
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Kakehi A, Suga H, Isogai H. Preparation of new nitrogen-bridged heterocycles. 59. Syntheses and intramolecular interactions of 3-(acylmethylthio)- and 3-[(3-ethoxycarbonyl-2-propenyl)thio]thieno[3,4-b]indolizine derivatives. Chem Pharm Bull (Tokyo) 2007; 55:95-101. [PMID: 17202709 DOI: 10.1248/cpb.55.95] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Various thieno[3,4-b]indolizine derivatives having an acylmethylthio or (3-ethoxycarbonyl-2-propenyl)thio group at the 3-position which could not be obtained by a conventional method were prepared by a new procedure using cyanoethyl group as a protecting group and their intramolecular arene-pi interactions were investigated. In the (1)H-NMR spectra of these thieno[3,4-b]indolizines, the low-field shifts (delta 0.10-0.33 ppm) for the 5-protons were observed in comparison with those of 3-(methylthio)thieno[3,4-b]indolizines as a standard. The UV spectra also exhibited a characteristic absorption band at 425-445 nm attributable to the arene-pi interaction but their intensities were generally lower than those of 3-(arylmethylthio)thieno[3,4-b]indolizines. In their X-ray analyses, the anti conformation for 3-(acylmethylthio)thieno[3,4-b]indolizines and the gauche one for the 3-(3-ethoxycarbonyl-2-propenyl)thio derivatives were exhibited.
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Affiliation(s)
- Akikazu Kakehi
- Department of Chemistry and Material Engineering, Shinshu University, Wakasato, Nagano 380-8553, Japan.
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13
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Kakehi A, Suga H, Okuno H, Okuhara M, Ohta A. Preparation of New Nitrogen-Bridged Heterocycles. 60. Syntheses and Conformational Analyses of Bis(indolizin-1-yl) Disulfides. Chem Pharm Bull (Tokyo) 2007; 55:1458-65. [DOI: 10.1248/cpb.55.1458] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Akikazu Kakehi
- Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University
| | - Hiroyuki Suga
- Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University
| | - Hiroko Okuno
- Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University
| | - Masaki Okuhara
- Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University
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14
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Kakehi A, Suga H, Kaneko Y, Fujii T, Tanaka N. Preparation of new nitrogen-bridged heterocycles. 58. Syntheses and intramolecular arene-pi interactions of 3-(allylthio)- and 3-(propargylthio)thieno[3,4-b]indolizine derivatives. Chem Pharm Bull (Tokyo) 2005; 53:1430-8. [PMID: 16272726 DOI: 10.1248/cpb.53.1430] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Various thieno indolizine derivatives having an allylthio or propargylthio group at the 3-position were prepared and their intramolecular arene-pi interactions were investigated. Their 1H-NMR spectra showed significant low-field shifts (delta 0.10-0.34 ppm) to the 5-proton on the thieno indolizine ring, and this effect was the reverse to that observed in 3-(arylmethylthio)thieno indolizines. However, their UV spectra exhibited a characteristic absorption band due to the arene-pi interaction near 430 nm and these values were almost similar to those for arene-arene interaction of 3-arylmethylthio derivatives though their molar extinction coefficients were largely varied by the 3-substituents. Furthermore, both types of gauche conformations in which the intramolecular arene-pi interactions are possible in one form and impossible in the other were confirmed by X-ray analyses of some compounds.
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Affiliation(s)
- Akikazu Kakehi
- Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, Nagano, Japan.
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15
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Yue G, Wan Y, Song S, Yang G, Chen Z. Synthesis of a library of benzoindolizines using poly(ethylene glycol) as soluble support. Bioorg Med Chem Lett 2005; 15:453-8. [PMID: 15603972 DOI: 10.1016/j.bmcl.2004.10.054] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2004] [Accepted: 10/16/2004] [Indexed: 11/27/2022]
Abstract
A library of benzoindolizines (pyrrolo [1,5-a] quinolines 10 and pyrrolo [1,5-a] quinolines 9) has been synthesized using poly(ethylene glycol) (PEG) as soluble polymer support. The PEG-supported isoquinolinium salt 4 reacted, respectively, with active alkenes 11 using tetrakispyridinecobalt(II) dichromate (TPCD) as oxidant or alkynes 12 to give 10, of which yields were from moderate to high. By analogy, the reaction of PEG-supported quinolinium salt 3 with 12 was to produce 9. However, in the presence of TPCD the reaction of 3 with 11 afforded indolizines 8, which was discovered firstly.
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Affiliation(s)
- Guizhou Yue
- Faculty of Chemistry and Material Science, Hubei University, Wuhan, Hubei 430062, China
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16
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Kakehi A, Suga H, Hatayama S, Kubo D. Syntheses of Some 1-(α-Hydroxybenzyl)thieno[3,4-b]indolizine Derivatives and Their Unexpected Condensation Reactions. HETEROCYCLES 2005. [DOI: 10.3987/com-05-10406] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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17
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Kakehi A, Suga H, Yamauchi Y, Yasuraoka K, Kobayashi T, Ohta A. Preparation of new nitrogen-bridged heterocycles. 56. Syntheses and reactions of 1-[2,2-bis(alkylthio)-1-(ethoxycarbonylacetyl)vinyl]pyridinium salts. Chem Pharm Bull (Tokyo) 2004; 52:1316-21. [PMID: 15516753 DOI: 10.1248/cpb.52.1316] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The title compounds, readily available from the S-alkylation of pyridinium 1-[alkylthio(thiocarbonyl)](ethoxycarbonylacetyl)methylides with alkyl halides or alkyl bromoacetates, were treated with a base and then a dehydrogenating agent to provide some unique products such as 3-[bis(alkylthio)methylene]-2(3H)-indolizinones and dialkyl 7-methyl-4-oxo-1,4,8,8a-tetrahydro-1,4-thiazino[3,4,5-cd]indolizine-1,5-dicarboxylates. On the other hand, similar reaction of these pyridinium salts in the absence of the dehydrogenating agent afforded alkyl 2-hydroxyindlizine-3-carboxythiolates, whose yields were increased by adding trifluoroacetic acid to the reaction mixture. The structures of some products were confirmed by the X-ray analyses.
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Affiliation(s)
- Akikazu Kakehi
- Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan.
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Kakehi A, Ito S, Suga H, Kobayashi Y, Zuo P, Iriye R. Preparation of New Nitrogen-Bridged Heterocycles. 55. Reinvestigation of the Bromination/Dehydrobromination of Ethyl 3-[2-(Methylthio)indolizin-3-yl]acrylate Derivatives. Chem Pharm Bull (Tokyo) 2004; 52:279-81. [PMID: 14758019 DOI: 10.1248/cpb.52.279] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The bromination/dehydrobromination reactions of ethyl 3-[1-alkoxycarbonyl-2-(methylthio)indolizin-3-yl]acrylates were reinvestigated. Reactions of the title compounds with two equivalents of bromine, followed by heating of the resulting reaction mixture and then treatment with a base gave the unexpected dialkyl 7-bromothieno[2,3-b]indolizine-2,9-dicarboxylates, while similar reactions using benzyltrimethylammonium tribromide as a brominating agent afforded only non-brominated thieno[2,3-b]indolizine derivatives, which were converted to the corresponding 7-bromo derivatives upon further treatment with bromine.
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Affiliation(s)
- Akikazu Kakehi
- Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, Tokyo, Japan.
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