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Vetter AC, Gilheany DG, Nikitin K. Wittig Olefination Using Phosphonium Ion-Pair Reagents Incorporating an Endogenous Base. Org Lett 2021; 23:1457-1462. [PMID: 33529039 DOI: 10.1021/acs.orglett.1c00133] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Despite common perception, the use of strong bases in Wittig chemistry is utterly unnecessary: we report a series of novel ion-pair phosphonium carboxylate reagents which are essentially "storable ylides". These reagents are straightforwardly prepared in excellent yields, and their fluxional nature permits clean olefination of a broad range of aldehydes and even hemiacetals.
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Affiliation(s)
- Anna C Vetter
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Declan G Gilheany
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Kirill Nikitin
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
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2
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Yagüe C, Echevarría I, Vaquero M, Fidalgo J, Carbayo A, Jalón FA, Lima JC, Moro AJ, Manzano BR, Espino G. Non-emissive Ru II Polypyridyl Complexes as Efficient and Selective Photosensitizers for the Photooxidation of Benzylamines. Chemistry 2020; 26:12219-12232. [PMID: 32301532 DOI: 10.1002/chem.202001460] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 04/16/2020] [Indexed: 11/07/2022]
Abstract
Five new RuII polypyridyl complexes bearing N-(arylsulfonyl)-8-amidoquinolate ligands and three of their biscyclometalated IrIII congeners have been prepared and employed as photocatalysts (PCs) in the photooxidation of benzylamines with O2 . In particular, the new RuII complexes do not exhibit photoluminescence, rather they harvest visible light efficiently and are very stable in solution under irradiation with blue light. Their non-emissive behavior has been related to the low electrochemical energy gaps and rationalized on the basis of theoretical calculations (DFT analysis) that predict low S0 ←T1 energy values. Moreover, the RuII complexes, despite being non-emissive, display excellent activities in the selective photocatalytic transformation of benzylamines into the corresponding imines. The presence of an electron-withdrawing group (-CF3) on the arene ring of the N-(arylsulfonyl)-8-amidoquinolate ligand improves the photocatalytic activity of the corresponding photocatalyst. Furthermore, all the experimental evidence, including transient absorption spectroscopy measurements suggest that singlet oxygen is the actual oxidant. The IrIII analogues are considerably more photosensitive and consequently less efficient photosensitizers (PSs).
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Affiliation(s)
- Cristina Yagüe
- Universidad de Burgos, Departamento de Química, Facultad de Ciencias, Plaza Misael Bañuelos s/n, 09001, Burgos, Spain
| | - Igor Echevarría
- Universidad de Burgos, Departamento de Química, Facultad de Ciencias, Plaza Misael Bañuelos s/n, 09001, Burgos, Spain
| | - Mónica Vaquero
- Universidad de Burgos, Departamento de Química, Facultad de Ciencias, Plaza Misael Bañuelos s/n, 09001, Burgos, Spain
| | - Jairo Fidalgo
- Universidad de Burgos, Departamento de Química, Facultad de Ciencias, Plaza Misael Bañuelos s/n, 09001, Burgos, Spain
| | - Arancha Carbayo
- Universidad de Burgos, Departamento de Química, Facultad de Ciencias, Plaza Misael Bañuelos s/n, 09001, Burgos, Spain
| | - Félix A Jalón
- Universidad de Castilla-La Mancha, Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Químicas, Avda. Camilo J. Cela 10, 13071, Ciudad Real, Spain
| | - João C Lima
- Universidade NOVA de Lisboa, LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, 2829-516, Caparica, Portugal
| | - Artur J Moro
- Universidade NOVA de Lisboa, LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, 2829-516, Caparica, Portugal
| | - Blanca R Manzano
- Universidad de Castilla-La Mancha, Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Químicas, Avda. Camilo J. Cela 10, 13071, Ciudad Real, Spain
| | - Gustavo Espino
- Universidad de Burgos, Departamento de Química, Facultad de Ciencias, Plaza Misael Bañuelos s/n, 09001, Burgos, Spain
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Prikhod’ko SA, Shabalin AY, Shmakov MM, Bardin VV, Adonin NY. Ionic liquids with fluorine-containing anions as a new class of functional materials: features of the synthesis, physicochemical properties, and use. Russ Chem Bull 2020. [DOI: 10.1007/s11172-020-2719-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Politanskaya LV, Selivanova GA, Panteleeva EV, Tretyakov EV, Platonov VE, Nikul’shin PV, Vinogradov AS, Zonov YV, Karpov VM, Mezhenkova TV, Vasilyev AV, Koldobskii AB, Shilova OS, Morozova SM, Burgart YV, Shchegolkov EV, Saloutin VI, Sokolov VB, Aksinenko AY, Nenajdenko VG, Moskalik MY, Astakhova VV, Shainyan BA, Tabolin AA, Ioffe SL, Muzalevskiy VM, Balenkova ES, Shastin AV, Tyutyunov AA, Boiko VE, Igumnov SM, Dilman AD, Adonin NY, Bardin VV, Masoud SM, Vorobyeva DV, Osipov SN, Nosova EV, Lipunova GN, Charushin VN, Prima DO, Makarov AG, Zibarev AV, Trofimov BA, Sobenina LN, Belyaeva KV, Sosnovskikh VY, Obydennov DL, Usachev SA. Organofluorine chemistry: promising growth areas and challenges. RUSSIAN CHEMICAL REVIEWS 2019. [DOI: 10.1070/rcr4871] [Citation(s) in RCA: 94] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Shabalin AY, Adonin NY, Bardin VV. Substitution of fluorine in M[C 6F 5BF 3] with organolithium compounds: distinctions between O- and N-nucleophiles. Beilstein J Org Chem 2017; 13:703-713. [PMID: 28503205 PMCID: PMC5405681 DOI: 10.3762/bjoc.13.69] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 03/28/2017] [Indexed: 11/23/2022] Open
Abstract
Borates M[C6F5BF3] (M = K, Li, Bu4N) react with organolithium compounds, RLi (R = Me, Bu, Ph), in 1,2-dimethoxyethane or diglyme to give M[4-RC6F4BF3] and M[2-RC6F4BF3]. When R is Me or Bu, the nucleophilic substitution of the fluorine atom at the para position to boron is the predominant route. When R = Ph, the ratio M[4-RC6F4BF3]/M[2-RC6F4BF3] is ca. 1:1. Substitution of the fluorine atom at the ortho position to boron is solely caused by the coordination of RLi via the lithium atom with the fluorine atoms of the BF3 group. This differs from the previously reported substitution in K[C6F5BF3] by O- and N-nucleophiles that did not produce K[2-NuC6F4BF3].
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Affiliation(s)
- Anton Yu Shabalin
- G.K. Boreskov Institute of Catalysis, SB RAS, Acad. Lavrentjev Ave. 5, Novosibirsk, 630090, Russian Federation.,Novosibirsk State University, Pirogova str. 2, Novosibirsk, 630090, Russian Federation
| | - Nicolay Yu Adonin
- G.K. Boreskov Institute of Catalysis, SB RAS, Acad. Lavrentjev Ave. 5, Novosibirsk, 630090, Russian Federation.,Novosibirsk State University, Pirogova str. 2, Novosibirsk, 630090, Russian Federation
| | - Vadim V Bardin
- Novosibirsk State University, Pirogova str. 2, Novosibirsk, 630090, Russian Federation.,N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, SB RAS, Acad. Lavrentjev Ave. 9, Novosibirsk, 630090, Russian Federation
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Prikhod'ko SA, Shabalin AY, Bardin VV, Eltsov IV, Shundrina IK, Parmon VN, Adonin NY. 1-Alkyl-3-methylimidazolium 4-organyloxy-2,3,5,6-tetrafluorophenyltrifluoroborates as a new platform for ionic liquids with specific properties. RSC Adv 2017. [DOI: 10.1039/c7ra01709j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
A new synthetic platform for ionic liquids (ILs) with specific properties was suggested based on the polyfluorophenyltrifluoroborate anions, Q[4-XC6F4BF3] (X = F, RO).
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Affiliation(s)
| | | | - Vadim V. Bardin
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS
- 630090 Novosibirsk
- Russia
| | | | - Inna K. Shundrina
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS
- 630090 Novosibirsk
- Russia
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Korb M, Lang H. Multi‐Ferrocenyl Aryl Ethers – Applying Nucleophilic Aromatic Substitution Reactions to Aryl Fluorides. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600850] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Marcus Korb
- Department of Inorganic Chemistry Faculty of Natural Sciences Technische Universität Chemnitz 09107 Chemnitz Germany
| | - Heinrich Lang
- Department of Inorganic Chemistry Faculty of Natural Sciences Technische Universität Chemnitz 09107 Chemnitz Germany
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Adonin NY, Shabalin AY, Bardin VV. Hydrodeboration of potassium polyfluoroaryl(fluoro)borates with alcohols. J Fluor Chem 2014. [DOI: 10.1016/j.jfluchem.2014.09.016] [Citation(s) in RCA: 3] [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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Stephens DE, Chavez G, Valdes M, Dovalina M, Arman HD, Larionov OV. Synthetic and mechanistic aspects of the regioselective base-mediated reaction of perfluoroalkyl- and perfluoroarylsilanes with heterocyclic N-oxides. Org Biomol Chem 2014; 12:6190-9. [PMID: 24993899 DOI: 10.1039/c4ob01088d] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The scope and mechanistic implications of the direct transformation of heterocyclic N-oxides to 2-trifluoromethyl-, and related perfluoroalkyl- and perfluoroaryl-substituted N-heterocycles has been studied. The reaction is effected by perfluoroalkyl- and perfluorophenyltrimethylsilane in the presence of strong base. In situ displacement of the para-fluoro substituent in the pentafluorophenyl ring and the methoxy group in 8-methoxyquinolines with additional nucleophiles allows for further site-selective refunctionalization of the N-heterocyclic products.
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Affiliation(s)
- David E Stephens
- Department of Chemistry, University of Texas at San Antonio, San Antonio, Texas, USA.
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Shabalin AY, Adonin NY, Bardin VV, Taran OP, Ayusheev AB, Parmon VN. Synthesis of potassium 4-(1-azol-1-yl)-2,3,5,6-tetrafluorophenyltrifluoroborates from K[C6F5BF3] and alkali metal azol-1-ides. The dramatic distinction in nucleophilicity of alkali metal azol-1-ides and dialkylamides. J Fluor Chem 2013. [DOI: 10.1016/j.jfluchem.2013.07.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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