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Zhang P, Liu H, Xu S, He Y, He X, Sun B, Hu J. Direct Construction of 1,4-Dihydropyridazines and Pyrazoles via Annulation of Alkyl 2-Aroyl-1-chlorocyclopropanecarboxylates. J Org Chem 2024; 89:9853-9860. [PMID: 38822472 DOI: 10.1021/acs.joc.4c00520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2024]
Abstract
An efficient and chemodivergent synthesis of highly functionalized 1,4-dihydropyridazines and pyrazoles has been accomplished via base-promoted annulation between hydrazones and alkyl 2-aroyl-1-chlorocyclopropanecarboxylates, respectively. This transition-metal-free domino reaction proceeded rapidly under mild basic conditions, affording potentially bioactive 1,4-dihydropyridazine and pyrazole derivatives in moderate yields. The conversion of 1,4-dihydropyridazine to pyrazole was confirmed by adjusting the quantity of the base.
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Affiliation(s)
- Pengwei Zhang
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, P. R. China
| | - Huili Liu
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, P. R. China
| | - Shuo Xu
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, P. R. China
| | - Yiqun He
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, P. R. China
| | - Xinhao He
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, P. R. China
| | - Bing Sun
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, P. R. China
| | - Junhao Hu
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, P. R. China
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Ivanova EE, Shabalin DA, Ushakov IA, Vashchenko AV, Schmidt EY, Trofimov BA. Diastereoselective synthesis of tetrahydropyrrolo[1,2- d]oxadiazoles from functionalized Δ 1-pyrrolines and in situ generated nitrile oxides. Org Biomol Chem 2023; 21:1725-1736. [PMID: 36723150 DOI: 10.1039/d2ob02230c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Tetrahydropyrrolo[1,2-d]oxadiazoles have been synthesized in good-to-excellent yields via the cycloaddition of nitrile oxides (in situ generated from aldoximes) to readily accessible functionalized Δ1-pyrrolines. The reaction proceeds smoothly at room temperature in a two-phase system in the presence of sodium hypochloride as an oxidant to diastereoselectively afford pharmaceutically prospective 1,2,4-oxadiazolines fused with a five-membered ring. The reaction tolerates a broad range of substrates, including those with oxidant-sensitive functional groups and competitive reaction sites.
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Affiliation(s)
- Evgeniya E Ivanova
- A.E. Favorsky Irkutsk Institute of Chemistry SB RAS, 1 Favorsky St., Irkutsk, 664033, Russian Federation.
| | - Dmitrii A Shabalin
- A.E. Favorsky Irkutsk Institute of Chemistry SB RAS, 1 Favorsky St., Irkutsk, 664033, Russian Federation.
| | - Igor' A Ushakov
- A.E. Favorsky Irkutsk Institute of Chemistry SB RAS, 1 Favorsky St., Irkutsk, 664033, Russian Federation.
| | - Alexander V Vashchenko
- A.E. Favorsky Irkutsk Institute of Chemistry SB RAS, 1 Favorsky St., Irkutsk, 664033, Russian Federation.
| | - Elena Yu Schmidt
- A.E. Favorsky Irkutsk Institute of Chemistry SB RAS, 1 Favorsky St., Irkutsk, 664033, Russian Federation.
| | - Boris A Trofimov
- A.E. Favorsky Irkutsk Institute of Chemistry SB RAS, 1 Favorsky St., Irkutsk, 664033, Russian Federation.
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3
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Shabalin DA, Kazak MK, Ushakov IA, Vashchenko AV, Schmidt EY. Synthesis of Pyrrolo[2,1- a]isoquinolinium Salts from 1-Pyrrolines and Alkynes via Rhodium-Catalyzed C-H Functionalization/N-Annulation Tandem Reaction. J Org Chem 2022; 87:6860-6869. [PMID: 35507755 DOI: 10.1021/acs.joc.2c00555] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A convenient synthesis of pyrrolo[2,1-a]isoquinolinium salts from 1-pyrrolines and alkynes through rhodium-catalyzed C-H functionalization/N-annulation tandem reaction is described. The protocol features a good substrate tolerance, mild reaction conditions, and high yields of target products. Exploration of the alkyne scope unexpectedly revealed a novel labile functional group-promoted rhodium-catalyzed C-H functionalization/C-annulation/elimination cascade reaction of 1-pyrrolines with electron-deficient alkynes.
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Affiliation(s)
- Dmitrii A Shabalin
- A.E. Favorsky Irkutsk Institute of Chemistry SB RAS, 1 Favorsky St, Irkutsk, 664033, Russian Federation
| | - Maxim K Kazak
- A.E. Favorsky Irkutsk Institute of Chemistry SB RAS, 1 Favorsky St, Irkutsk, 664033, Russian Federation
| | - Igor' A Ushakov
- A.E. Favorsky Irkutsk Institute of Chemistry SB RAS, 1 Favorsky St, Irkutsk, 664033, Russian Federation
| | - Alexander V Vashchenko
- A.E. Favorsky Irkutsk Institute of Chemistry SB RAS, 1 Favorsky St, Irkutsk, 664033, Russian Federation
| | - Elena Yu Schmidt
- A.E. Favorsky Irkutsk Institute of Chemistry SB RAS, 1 Favorsky St, Irkutsk, 664033, Russian Federation
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Shabalin DA, Ivanova EE, Ushakov IA, Schmidt EY, Trofimov BA. Hydrazides in the reaction with hydroxypyrrolines: less nucleophilicity - more diversity. Beilstein J Org Chem 2021; 17:319-324. [PMID: 33564339 PMCID: PMC7849252 DOI: 10.3762/bjoc.17.29] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Accepted: 01/21/2021] [Indexed: 11/23/2022] Open
Abstract
Expedient protocols for the synthesis of three types of highly functionalized azaheterocyclic scaffolds (dihydropyridazines, tetrahydropyridazines, and partially saturated tricyclic systems) from readily available hydroxypyrrolines and hydrazides are described. The directions of the transformation of a common initial intermediate, namely a Brønsted acid-activated hydroxypyrroline, depend on the reaction conditions and the structure of the hydrazides.
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Affiliation(s)
- Dmitrii A Shabalin
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky St, 664033 Irkutsk, Russian Federation
| | - Evgeniya E Ivanova
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky St, 664033 Irkutsk, Russian Federation
| | - Igor A Ushakov
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky St, 664033 Irkutsk, Russian Federation
| | - Elena Yu Schmidt
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky St, 664033 Irkutsk, Russian Federation
| | - Boris A Trofimov
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky St, 664033 Irkutsk, Russian Federation
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Shabalin DA, Dubovtsev AY, Schmidt EY, Trofimov BA. Calcium Carbide as Acetylene Source in Cascade Assemblies of Hydroxypyrrolines and 3H‐Pyrroles from Ketoximes. ChemistrySelect 2020. [DOI: 10.1002/slct.202000392] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Dmitrii A. Shabalin
- A. E. Favorsky Irkutsk Institute of ChemistrySiberian Branch of the Russian Academy of Sciences 1 Favorsky St 664033 Irkutsk Russian Federation
| | - Alexey Yu. Dubovtsev
- Institute of ChemistrySaint Petersburg State University Universitetskaya Nab. 7/9 199034 Saint Petersburg Russian Federation
| | - Elena Yu. Schmidt
- A. E. Favorsky Irkutsk Institute of ChemistrySiberian Branch of the Russian Academy of Sciences 1 Favorsky St 664033 Irkutsk Russian Federation
| | - Boris A. Trofimov
- A. E. Favorsky Irkutsk Institute of ChemistrySiberian Branch of the Russian Academy of Sciences 1 Favorsky St 664033 Irkutsk Russian Federation
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Feng J, He T, Xie Y, Yu Y, Baell JB, Huang F. I 2-Promoted [4 + 2] cycloaddition of in situ generated azoalkenes with enaminones: facile and efficient synthesis of 1,4-dihydropyridazines and pyridazines. Org Biomol Chem 2020; 18:9483-9493. [PMID: 33179698 DOI: 10.1039/d0ob01958e] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A facile and efficient strategy for the synthesis of 1,4-dihydropyridazines and pyridazines through I2-promoted [4 + 2] cycloaddition of in situ generated azoalkenes with enaminones has been developed. The switch in selectivity is attributed to the judicious choice of different reaction temperatures. The key features of this work include controllable and selective synthesis, good functional group tolerance, good to excellent reaction yields, metal/base-free conditions, and also applicability to one-pot methodology.
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Affiliation(s)
- Jiajun Feng
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 211816, P. R. China.
| | - Tiantong He
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 211816, P. R. China.
| | - Yuxing Xie
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, P. R. China
| | - Yang Yu
- School of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Jonathan B Baell
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 211816, P. R. China. and Medicinal Chemistry Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia
| | - Fei Huang
- School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 211816, P. R. China. and School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, P. R. China
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7
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Shabalin DA, Kuzmin AV, Schmidt EY, Trofimov BA. Non-Aromatic 3H-Pyrroles in the Reaction with Nucleophiles: Is High Reactivity a Myth? European J Org Chem 2019. [DOI: 10.1002/ejoc.201900152] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Dmitrii A. Shabalin
- A. E. Favorsky Irkutsk Institute of Chemistry; Siberian Branch of the Russian Academy of Sciences; 1 Favorsky St 664033 Irkutsk Russian Federation
| | - Anton V. Kuzmin
- A. E. Favorsky Irkutsk Institute of Chemistry; Siberian Branch of the Russian Academy of Sciences; 1 Favorsky St 664033 Irkutsk Russian Federation
- Limnological Institute; Siberian Branch of the Russian Academy of Sciences; 3 Ulan-Batorskaya St 664033 Irkutsk Russian Federation
| | - Elena Yu. Schmidt
- A. E. Favorsky Irkutsk Institute of Chemistry; Siberian Branch of the Russian Academy of Sciences; 1 Favorsky St 664033 Irkutsk Russian Federation
| | - Boris A. Trofimov
- A. E. Favorsky Irkutsk Institute of Chemistry; Siberian Branch of the Russian Academy of Sciences; 1 Favorsky St 664033 Irkutsk Russian Federation
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Dvorko MY, Shabalin DA, Schmidt EY, Ushakov IA, Trofimov BA. Synthesis of Uniquely Functionalized Pyrrolines from Hydroxypyrrolines. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700776] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Marina Yu. Dvorko
- A.E. Favorsky Irkutsk Institute of Chemistry; Siberian Branch of the Russian Academy of Sciences; 1 Favorsky St. 664033 Irkutsk Russian Federation
| | - Dmitrii A. Shabalin
- A.E. Favorsky Irkutsk Institute of Chemistry; Siberian Branch of the Russian Academy of Sciences; 1 Favorsky St. 664033 Irkutsk Russian Federation
| | - Elena Yu. Schmidt
- A.E. Favorsky Irkutsk Institute of Chemistry; Siberian Branch of the Russian Academy of Sciences; 1 Favorsky St. 664033 Irkutsk Russian Federation
| | - Igor A. Ushakov
- A.E. Favorsky Irkutsk Institute of Chemistry; Siberian Branch of the Russian Academy of Sciences; 1 Favorsky St. 664033 Irkutsk Russian Federation
| | - Boris A. Trofimov
- A.E. Favorsky Irkutsk Institute of Chemistry; Siberian Branch of the Russian Academy of Sciences; 1 Favorsky St. 664033 Irkutsk Russian Federation
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