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Catalyst free one pot three components synthesis of 2-iminothiazoles from nitroepoxides and thiourea. Sci Rep 2023; 13:3079. [PMID: 36813887 PMCID: PMC9947138 DOI: 10.1038/s41598-023-30243-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 02/20/2023] [Indexed: 02/24/2023] Open
Abstract
Nitroepoxides were introduced as efficient substrates for the one-pot three-component synthesis of 2-iminothiazoles under catalyst-free conditions. Reaction of amines, isothiocyanates, and nitroepoxides in THF at 10-15 °C afforded corresponding 2-iminothiazoles in high to excellent yields. The reaction proceeds via the in situ formation of thiourea from an amine and an isothiocyanate, followed by nitroepoxide ring opening with the sulfur of thiourea, cyclization reaction, and dehydration cascade. The structures of products were confirmed by IR, NMR, HRMS analyses and X-ray crystallography.
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Ushakov PY, Ioffe SL, Sukhorukov AY. Regio- and diastereoselective access to densely functionalized ketones via the Boekelheide rearrangement of isoxazoline N-oxides. Org Biomol Chem 2022; 20:5624-5637. [PMID: 35796681 DOI: 10.1039/d2ob00787h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
In this work, the classical "isoxazoline route" toward aldols involving the [3 + 2]-cycloaddition of nitrile oxide to alkenes and hydrogenolysis of the oxime group was revisited. To avoid regioselectivity issues, [4 + 1]-annulation of nitroalkenes with sulfonium ylides was used to construct the isoxazoline ring bearing an N-oxide moiety. Subsequent deoxygenative C-H functionalization using the Boekelheide rearrangement and hydrogenolysis of the isoxazoline ring afforded α'-acyloxy-substituted aldols, which are difficult to access both by the classical aldol reaction and the "isoxazoline route". The products are formed in good to high overall yields and as single diastereomers in most cases. The synthetic use of these aldols was showcased by their smooth transformation into diastereomerically pure triols and a 2,3-diaryl-4-hydroxy-substituted tetrahydrofuran derivative, which is structurally related to cinncassin B.
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Affiliation(s)
- Pavel Yu Ushakov
- N. D. Zelinsky Institute of Organic Chemistry, 119991, Leninsky prospect, 47, Moscow, Russian Federation.
| | - Sema L Ioffe
- N. D. Zelinsky Institute of Organic Chemistry, 119991, Leninsky prospect, 47, Moscow, Russian Federation.
| | - Alexey Yu Sukhorukov
- N. D. Zelinsky Institute of Organic Chemistry, 119991, Leninsky prospect, 47, Moscow, Russian Federation.
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Xia F, Lu YQ, Sun P, Guo QY, Shi QL, Zhang JZ, Qiu C. A formal [4 + 2] annulation of diamines and prop-2-ynyl sulfonium salts for the synthesis of tetrahydroquinoxalines. Org Biomol Chem 2022; 20:8415-8419. [DOI: 10.1039/d2ob01590k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A formal [4 + 2] annulation of diamines and prop-2-ynyl sulfonium salts was developed.
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Affiliation(s)
- Fei Xia
- Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Yu-Qian Lu
- Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Peng Sun
- Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Qiu-Yan Guo
- Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Qiao-Li Shi
- Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Jun-Zhe Zhang
- Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Chong Qiu
- Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
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Abstract
2-Aminopyridine is a simple, low molecular weight and perfectly functionalised moiety known for the synthesis of diverse biological molecules. Many pharmaceutical companies across the globe aim to synthesise low-molecular weight molecules for use as pharmacophores against various biological targets. 2-Aminopyridine can serve as a perfect locomotive in the synthesis and pulling of such molecules towards respective pharmacological goals. The major advantage of this moiety is its simple design, which can be used to produce single products with minimum side reactions. Moreover, the exact weight of synthesised compounds is low, which enables facile identification of toxicity-causing metabolites in drug discovery programmes. This manuscript is a quick review of such pharmacophores derived from 2-aminopyridine.
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Affiliation(s)
- Ramdas Nishanth Rao
- Department of Chemistry, School of Advanced Science, Vellore Institute of Technology, Vellore 632014, India.
| | - Kaushik Chanda
- Department of Chemistry, School of Advanced Science, Vellore Institute of Technology, Vellore 632014, India.
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Ranjbari MA, Tavakol H. Catalyst-Free Synthesis of Benzofuran Derivatives from Cascade Reactions between Nitroepoxides and Salicylaldehydes. J Org Chem 2021; 86:4756-4762. [PMID: 33656875 DOI: 10.1021/acs.joc.1c00143] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Different benzofuran derivatives are synthesized via a catalyst-free reaction between nitroepoxides and salicylaldehydes. In the employed methodology, K2CO3 and DMF have been used at 110 °C, and the reactions were completed after 12 h in 33-84% yields. The highest yields were obtained using 3-nitrosalicylaldehyde. Finally, a plausible mechanism was proposed for the reaction, and some evidence was provided for this mechanism such as the detection of released acetate anion (using FTIR) and isolation and structure determination of the critical intermediate.
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Affiliation(s)
- Mohammad A Ranjbari
- Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Hossein Tavakol
- Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran
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Capobianco A, Meninno S, Lattanzi A. Unravelling the mechanism of the organocatalyzed aminolytic kinetic resolution of α-nitroepoxides: a theoretical study. Catal Sci Technol 2020. [DOI: 10.1039/c9cy01800j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The mechanism of the aminolytic kinetic resolution of 2-methyl-2-nitro-3-phenyl oxirane with aniline in the presence of Takemoto's catalyst is disclosed by way of DFT calculations.
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Affiliation(s)
- Amedeo Capobianco
- Dipartimento di Chimica e Biologia “A. Zambelli”
- Università di Salerno
- I-84084 Fisciano
- Italy
| | - Sara Meninno
- Dipartimento di Chimica e Biologia “A. Zambelli”
- Università di Salerno
- I-84084 Fisciano
- Italy
| | - Alessandra Lattanzi
- Dipartimento di Chimica e Biologia “A. Zambelli”
- Università di Salerno
- I-84084 Fisciano
- Italy
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7
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Badali E, Rahimzadeh H, Sharifi A, Habibi A, Ziyaei Halimehjani A. Nitroepoxide ring opening with thionucleophiles in water: synthesis of α-xanthyl ketones, β-keto sulfones and β-keto sulfonic acids. Org Biomol Chem 2020; 18:4983-4987. [DOI: 10.1039/d0ob00941e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nitroepoxide ring opening with thionucleophiles such as potassium xanthates, sodium aryl sulfinates and sodium bisulfite in water is investigated to provide the corresponding α-xanthyl-α-aryl-2-propanones, β-keto sulfones and β-keto sulfonic acids.
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Affiliation(s)
- Elham Badali
- Faculty of Chemistry
- Kharazmi University
- Tehran
- Iran
| | | | - Ali Sharifi
- Faculty of Chemistry
- Kharazmi University
- Tehran
- Iran
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Bou-Iserte L, Latorre A, Rodríguez S, González FV. Three-Step Telescoped Synthesis of Monosubstituted Vicinal Diamines from Aldehydes. ACS OMEGA 2019; 4:2261-2267. [PMID: 31459468 PMCID: PMC6648690 DOI: 10.1021/acsomega.8b03030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2018] [Accepted: 01/16/2019] [Indexed: 06/10/2023]
Abstract
Aldehydes are easily transformed into vicinal diamines and piperazines through a one-pot procedure including a Darzens reaction and treatment with an amine or diamine and then with a reducing agent. Additionally, quinoxalines can be accessed by reaction with 1,2-benzenediamine under oxidative conditions. These transformations are simple methods for the preparation of synthetically interesting monosubstituted diamines, piperazines, and quinoxalines.
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Zhu Y, Wang Q, Luo H, Zhang G, Yu Y. Efficient and facile strategy to substituted 2-aminothiazoles via ring opening of α-nitroepoxides. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.09.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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11
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Zhu F, Xie Y, Zhang J, Tian G, Qin H, Yang X, Hu T, He Y, Aisa HA, Shen J. A Facile Epoxide Aminolysis Promoted by ( t-BuO) 2Mg and Its Application to the Synthesis of Efinaconazole. Org Process Res Dev 2018. [DOI: 10.1021/acs.oprd.8b00081] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Fuqiang Zhu
- Key Laboratory of Plant Resources and Chemistry in Arid Regions, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, South Beijing Road 40-1, Urumqi, Xinjiang 830011, P. R. China
- University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, P. R. China
| | - Yuanchao Xie
- CAS Key Laboratory for Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, P. R. China
| | - Jian Zhang
- Topharman Shanghai Co., Ltd., Building 1, No. 388 Jialilue Road, Zhangjiang Hitech Park, Shanghai 201209, P. R. China
| | - Guanghui Tian
- Topharman Shanghai Co., Ltd., Building 1, No. 388 Jialilue Road, Zhangjiang Hitech Park, Shanghai 201209, P. R. China
| | - Hongjian Qin
- Topharman Shanghai Co., Ltd., Building 1, No. 388 Jialilue Road, Zhangjiang Hitech Park, Shanghai 201209, P. R. China
| | - Xiaojun Yang
- Topharman Shanghai Co., Ltd., Building 1, No. 388 Jialilue Road, Zhangjiang Hitech Park, Shanghai 201209, P. R. China
| | - Tianwen Hu
- Topharman Shanghai Co., Ltd., Building 1, No. 388 Jialilue Road, Zhangjiang Hitech Park, Shanghai 201209, P. R. China
| | - Yang He
- CAS Key Laboratory for Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, P. R. China
| | - Haji A. Aisa
- Key Laboratory of Plant Resources and Chemistry in Arid Regions, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, South Beijing Road 40-1, Urumqi, Xinjiang 830011, P. R. China
| | - Jingshan Shen
- CAS Key Laboratory for Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, P. R. China
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