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Koidan G, Hurieva A, Zahorulko S, Zadorozhny A, Lysenko V, Shvydenko T, Rusanov EB, Kostyuk A. Latent Carbene: Diaminomethylation of Thiophenes. European J Org Chem 2022. [DOI: 10.1002/ejoc.202201048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Georgyi Koidan
- Department of Organophosphorus Chemistry Institute of Organic Chemistry Murmanska 5 02660 Kyiv-94 Ukraine
| | - Anastasiya Hurieva
- Department of Organophosphorus Chemistry Institute of Organic Chemistry Murmanska 5 02660 Kyiv-94 Ukraine
| | - Serhii Zahorulko
- Department of Organophosphorus Chemistry Institute of Organic Chemistry Murmanska 5 02660 Kyiv-94 Ukraine
| | - Alexander Zadorozhny
- Department of Organophosphorus Chemistry Institute of Organic Chemistry Murmanska 5 02660 Kyiv-94 Ukraine
| | - Viacheslav Lysenko
- Department of Organophosphorus Chemistry Institute of Organic Chemistry Murmanska 5 02660 Kyiv-94 Ukraine
| | - Tetiana Shvydenko
- Department of Organophosphorus Chemistry Institute of Organic Chemistry Murmanska 5 02660 Kyiv-94 Ukraine
| | - Eduard B. Rusanov
- Department of Organophosphorus Chemistry Institute of Organic Chemistry Murmanska 5 02660 Kyiv-94 Ukraine
| | - Aleksandr Kostyuk
- Department of Organophosphorus Chemistry Institute of Organic Chemistry Murmanska 5 02660 Kyiv-94 Ukraine
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2
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Puleo TR, Klaus DR, Bandar JS. Nucleophilic C-H Etherification of Heteroarenes Enabled by Base-Catalyzed Halogen Transfer. J Am Chem Soc 2021; 143:12480-12486. [PMID: 34347457 DOI: 10.1021/jacs.1c06481] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
We report a general protocol for the direct C-H etherification of N-heteroarenes. Potassium tert-butoxide catalyzes halogen transfer from 2-halothiophenes to N-heteroarenes to form N-heteroaryl halide intermediates that undergo tandem base-promoted alcohol substitution. Thus, the simple inclusion of inexpensive 2-halothiophenes enables regioselective oxidative coupling of alcohols with 1,3-azoles, pyridines, diazines, and polyazines under basic reaction conditions.
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Affiliation(s)
- Thomas R Puleo
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Danielle R Klaus
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Jeffrey S Bandar
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
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3
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Inoue K, Feng Y, Mori A, Okano K. "Snapshot" Trapping of Multiple Transient Azolyllithiums in Batch. Chemistry 2021; 27:10267-10273. [PMID: 33960030 DOI: 10.1002/chem.202101256] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Indexed: 12/23/2022]
Abstract
Recent developments in flow microreactor technology have allowed the use of transient organolithium compounds that cannot be realized in a batch reactor. However, trapping the transient aryllithiums in a "halogen dance" is still challenging. Herein is reported the trapping of such short-lived azolyllithiums in a batch reactor by developing a finely tuned in situ zincation using zinc halide diamine complexes. The reaction rate is controlled by the appropriate choice of diamine ligand. The reaction is operationally simple and can be performed at 0 °C with high reproducibility on a multigram scale. This method was applicable to a wide range of brominated azoles allowing deprotonative functionalization, which was used for the concise divergent syntheses of both constitutional isomers of biologically active azoles.
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Affiliation(s)
- Kengo Inoue
- Department of Chemical Science and Engineering, Kobe University, 1-1 Rokkodai, Nada, Kobe, 657-8501, Japan
| | - Yuxuan Feng
- Department of Chemical Science and Engineering, Kobe University, 1-1 Rokkodai, Nada, Kobe, 657-8501, Japan
| | - Atsunori Mori
- Department of Chemical Science and Engineering, Kobe University, 1-1 Rokkodai, Nada, Kobe, 657-8501, Japan.,Research Center for Membrane and Film Technology, Kobe University, 1-1 Rokkodai, Nada, Kobe, 657-8501, Japan
| | - Kentaro Okano
- Department of Chemical Science and Engineering, Kobe University, 1-1 Rokkodai, Nada, Kobe, 657-8501, Japan
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4
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Okano K, Yamane Y, Nagaki A, Mori A. Trapping of Transient Thienyllithiums Generated by Deprotonation of 2,3- or 2,5-Dibromothiophene in a Flow Microreactor. Synlett 2020. [DOI: 10.1055/s-0040-1706479] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
AbstractSelective trapping of (4,5-dibromo-2-thienyl)lithium, known to undergo halogen dance, was achieved in a flow microreactor. This transient thienyllithium, generated by mixing 2,3-dibromothiophene and lithium diisopropylamide at –78 °C for 1.6 seconds, reacted with benzaldehyde. The reaction system is also applicable to other carbonyl compounds to afford the corresponding adducts in good yields. Moreover, the established conditions permit the conversion of 2,5-dibromothiophene into a mixture of the two constitutional isomers. The contrasting results are discussed on the basis of the reaction pathway.
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Affiliation(s)
- Kentaro Okano
- Department of Chemical Science and Engineering, Kobe University
| | - Yoshiki Yamane
- Department of Chemical Science and Engineering, Kobe University
| | - Aiichiro Nagaki
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University
| | - Atsunori Mori
- Department of Chemical Science and Engineering, Kobe University
- Research Center for Membrane and Film Technology, Kobe University
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5
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Affiliation(s)
- Kentaro Okano
- Department of Chemical Science and Engineering, Kobe University
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6
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Affiliation(s)
- Kengo Inoue
- Department of Chemical Science and Engineering Kobe University Rokkodai, Nada, Kobe 657-8501 Japan
| | - Kentaro Okano
- Department of Chemical Science and Engineering Kobe University Rokkodai, Nada, Kobe 657-8501 Japan
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7
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Morikawa D, Morii K, Yasuda Y, Mori A, Okano K. Convergent Total Synthesis of Lamellarins and Their Congeners. J Org Chem 2020; 85:8603-8617. [PMID: 32462869 DOI: 10.1021/acs.joc.0c00998] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A convergent total synthesis of lamellarins S and Z is described. The synthesis features a halogen dance of an easily accessible α,β-dibromopyrrole promoted by an ester moiety. The resultant β,β'-dibromopyrrole undergoes a ligand-controlled Suzuki-Miyaura coupling to provide a range of diarylated pyrrole derivatives. The established synthetic method was also applicable to the synthesis of ningalin B and lukianols A and B.
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Affiliation(s)
- Daiki Morikawa
- Department of Chemical Science and Engineering, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan
| | - Kazuki Morii
- Department of Chemical Science and Engineering, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan
| | - Yuto Yasuda
- Department of Chemical Science and Engineering, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan
| | - Atsunori Mori
- Department of Chemical Science and Engineering, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan.,Research Center for Membrane and Film Technology, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan
| | - Kentaro Okano
- Department of Chemical Science and Engineering, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan
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Okano K, Murase Y, Mori A. Synthesis of Furan-Fused Silole and Phosphole by One-Pot Halogen Dance/Homocoupling of Bromofurfural Derivative. HETEROCYCLES 2019. [DOI: 10.3987/com-18-s(f)103] [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: 11/19/2022]
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9
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Mari D, Miyagawa N, Okano K, Mori A. Regiocontrolled Halogen Dance of Bromothiophenes and Bromofurans. J Org Chem 2018; 83:14126-14137. [PMID: 30387608 DOI: 10.1021/acs.joc.8b02220] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The LDA (lithium diisopropylamide)-promoted regiocontrolled halogen dance of α-bromothiophenes and α-bromofurans is described. Bromothiophenes bearing a diethyl acetal moiety undergo selective deprotonation at the β-position adjacent to the bromo group. In contrast, oxazoline, ester, and amide groups act as directing groups in the initial lithiation step to generate a carbanion at the β-position neighboring the directing group to exclusively give the other regioisomer. These results can be applied to the regiocontrolled halogen dance of bromofuran derivatives.
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Affiliation(s)
- Daichi Mari
- Department of Chemical Science and Engineering , Kobe University , 1-1 Rokkodai , Nada, Kobe 657-8501 , Japan
| | - Naoki Miyagawa
- Department of Chemical Science and Engineering , Kobe University , 1-1 Rokkodai , Nada, Kobe 657-8501 , Japan
| | - Kentaro Okano
- Department of Chemical Science and Engineering , Kobe University , 1-1 Rokkodai , Nada, Kobe 657-8501 , Japan
| | - Atsunori Mori
- Department of Chemical Science and Engineering , Kobe University , 1-1 Rokkodai , Nada, Kobe 657-8501 , Japan
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Koch A, Krieck S, Görls H, Westerhausen M. 5-Methyl-2-thienylcalcium iodide. Dalton Trans 2018; 47:12534-12539. [PMID: 29725683 DOI: 10.1039/c8dt01398e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reduction of 2-bromo- and 3-bromothiophene with calcium powder gives impure thienylcalcium complexes due to interference of various subsequent metalation and calcium-halogen exchange reactions as well as ether degradation. Therefore, calcium-iodine exchange succeeds via the reaction of trimethylsilylmethylcalcium halide with 3-iodothiophene in tetrahydrofuran at -78 °C in the presence of chloro-trimethylsilane, leading to the quantitative formation of 3-(trimethylsilyl)thiophene. The synthesis and isolation of a thienylcalcium halide, a heavy Grignard reagent with a thienyl group, is possible via the reduction of 2-iodo-5-methylthiophene with activated calcium in THF. Substitution of the thf ligands in 5-methyl-2-thienylcalcium iodide ([5-MeThien-2-Ca(thf)4I], 1) by dissolution in tetrahydropyran (THP) leads to the thp complex of 5-methyl-2-thienylcalcium iodide ([5-MeThien-2-Ca(thp)4I], 2). A low field shift of the calcium-bound carbon atom is characteristic of thienylcalcium complexes.
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Affiliation(s)
- Alexander Koch
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University Jena, Humboldtstrasse 8, D-07743 Jena, Germany.
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Göbel D, Clamor N, Nachtsheim BJ. Regioselective ortho-functionalization of bromofluorenecarbaldehydes using TMPMgCl·LiCl. Org Biomol Chem 2018; 16:4071-4075. [PMID: 29785418 DOI: 10.1039/c8ob01072b] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A highly regioselective functionalization of 7-bromofluorene-2-carbaldehydes, potent organic chromophores, in position C3 using a mild ortho-metallation strategy (DoM) with TMPMgCl·LiCl has been developed.
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Affiliation(s)
- Dominik Göbel
- University of Bremen
- Department of Organic and Analytical Chemistry
- 28359 Bremen
- Germany
| | - Nils Clamor
- University of Bremen
- Department of Organic and Analytical Chemistry
- 28359 Bremen
- Germany
| | - Boris J. Nachtsheim
- University of Bremen
- Department of Organic and Analytical Chemistry
- 28359 Bremen
- Germany
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