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Itakhunov RN, Odin IS, Gusev DM, Grabovskiy SA, Gordon KV, Vologzhanina AV, Sokov SA, Sosnin IM, Golovanov AA. Cyclization of arylhydrazones of cross-conjugated enynones: synthesis of luminescent styryl-1 H-pyrazoles and propenyl-1 H-pyrazoles. Org Biomol Chem 2022; 20:8693-8713. [DOI: 10.1039/d2ob01427k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
On the basis of available ethynyl vinyl ketones and arylhydrazines, the authors have developed the two-stage synthesis method for styrylpyrazoles possessing fluorescent abilities, as well as the gram-scale synthesis method for fluorescent probes.
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Affiliation(s)
- Radik N. Itakhunov
- S. P. Korshunov Research Laboratory No. 13, Department Chemical Technology and Resource Conservation, Togliatti State University, Belorusskaya Str. 14, Togliatti, 445020, Russia
| | - Ivan S. Odin
- S. P. Korshunov Research Laboratory No. 13, Department Chemical Technology and Resource Conservation, Togliatti State University, Belorusskaya Str. 14, Togliatti, 445020, Russia
| | - Dmitry M. Gusev
- S. P. Korshunov Research Laboratory No. 13, Department Chemical Technology and Resource Conservation, Togliatti State University, Belorusskaya Str. 14, Togliatti, 445020, Russia
| | - Stanislav A. Grabovskiy
- S. P. Korshunov Research Laboratory No. 13, Department Chemical Technology and Resource Conservation, Togliatti State University, Belorusskaya Str. 14, Togliatti, 445020, Russia
- Laboratory of Chemical Kinetics, Ufa Institute of Chemistry, UFRS of the Russian Academy of Science, October Av. 71, Ufa, 450054, Russia
| | - Kareem V. Gordon
- S. P. Korshunov Research Laboratory No. 13, Department Chemical Technology and Resource Conservation, Togliatti State University, Belorusskaya Str. 14, Togliatti, 445020, Russia
| | - Anna V. Vologzhanina
- Laboratory for X-Ray Diffraction Studies – X-Ray Structural Centre (XRSC), A. N. Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Science, 28 Vavilova Str., Moscow, 119334, Russia
| | - Sergey A. Sokov
- S. P. Korshunov Research Laboratory No. 13, Department Chemical Technology and Resource Conservation, Togliatti State University, Belorusskaya Str. 14, Togliatti, 445020, Russia
| | - Ilya M. Sosnin
- S. P. Korshunov Research Laboratory No. 13, Department Chemical Technology and Resource Conservation, Togliatti State University, Belorusskaya Str. 14, Togliatti, 445020, Russia
| | - Alexander A. Golovanov
- S. P. Korshunov Research Laboratory No. 13, Department Chemical Technology and Resource Conservation, Togliatti State University, Belorusskaya Str. 14, Togliatti, 445020, Russia
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Golovanov AA, Odin IS, Gusev DM, Vologzhanina AV, Sosnin IM, Grabovskiy SA. Reactivity of Cross-Conjugated Enynones in Cyclocondensations with Hydrazines: Synthesis of Pyrazoles and Pyrazolines. J Org Chem 2021; 86:7229-7241. [PMID: 33955756 DOI: 10.1021/acs.joc.1c00569] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The cyclocondensation of cross-conjugated enynones, dienynones, and trienynones (easily available due to low-cost starting compounds) with arylhydrazines leads to the regioselective synthesis of pyrazole derivatives (dihetaryl-substituted ethens, buta-1,3-diens, and hexa-1,3,5-triens) or results in 4,5-dihydro-1H-pyrazoles in good yield. The reaction path is controlled by the character of the substituent in enynone: the pyrazoles are obtained from the reaction of substrates that contain five-membered heteroaromatic substituents with arylhydrazines, and the 4,5-dihydro-1H-pyrazoles are obtained from the reaction of 1,5-diphenylpent-1-en-4-yn-3-one with arylhydrazines consistently. Despite the presence of a substituent, cyclocondensation of 2-hydrazinylpyridine with all of examined cross-conjugated enynones leads to the formation of pyrazoles. The reaction does not require special conditions (temperature, catalyst, inert atmosphere). The cyclocondensation pathways are determined by the electronic effect of an electron-rich five-membered heteroaromatic ring in the substrate. The synthesis allows use of various substituents and functional groups in enynone and hydrazine. The present method features high yields and simplicity of the product purification. The obtained pyrazoles possess fluorescent properties with a quantum yield up to 31%.
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Affiliation(s)
| | - Ivan S Odin
- Togliatti State University, 14 Belorusskaya Str., 445020 Togliatti, Russia
| | - Dmitry M Gusev
- Togliatti State University, 14 Belorusskaya Str., 445020 Togliatti, Russia
| | - Anna V Vologzhanina
- A. N. Nesmeyanov Institute of Organoelement Compounds of the Russian Academy of Science, 28 Vavilova Str., 119991 Moscow, Russia
| | - Ilya M Sosnin
- Togliatti State University, 14 Belorusskaya Str., 445020 Togliatti, Russia
| | - Stanislav A Grabovskiy
- Ufa Institute of Chemistry, UFRS of the Russian Academy of Science, 71 October Av., 450054 Ufa, Russia
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Golovanov AA, Gusev DM, Odin IS, Zlotskii SS. Conjugated 2,4,1- and 1,4,3-enynones as polycentricelectrophiles in synthesis of heterocyclic compounds. Chem Heterocycl Compd (N Y) 2019. [DOI: 10.1007/s10593-019-02462-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Golovanov AA, Odin IS, Zlotskii SS. Conjugated enynones: preparation, properties and applications in organic synthesis. RUSSIAN CHEMICAL REVIEWS 2019. [DOI: 10.1070/rcr4808] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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