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Antonova YA, Nelyubina YV, Ioffe SL, Tabolin AA. [3+3]-Annulation of Cyclic Nitronates with Vinyl Diazoacetates: Diastereoselective Synthesis of Partially Saturated [1,2]Oxazino[2,3- b][1,2]oxazines and Their Base-Promoted Ring Contraction to Pyrrolo[1,2- b][1,2]oxazine Derivatives. Molecules 2023; 28:molecules28073025. [PMID: 37049788 PMCID: PMC10096057 DOI: 10.3390/molecules28073025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 03/23/2023] [Accepted: 03/24/2023] [Indexed: 04/14/2023] Open
Abstract
A rhodium(II)-catalyzed reaction of cyclic nitronates (5,6-dihydro-4H-1,2-oxazine N-oxides) with vinyl diazoacetates proceeds as a [3+3]-annulation producing bicyclic unsaturated nitroso acetals (4a,5,6,7-tetrahydro-2H-[1,2]oxazino[2,3-b][1,2]oxazines). Optimization of reaction conditions revealed the use of Rh(II) octanoate as the preferred catalyst in THF at room temperature, which allows the preparation of target products in good yields and excellent diastereoselectivity. Under basic conditions, namely, the combined action of DBU and alcohol, these nitroso acetals undergo ring contraction of an unsaturated oxazine ring into the corresponding pyrrole. Both transformations can be performed in a one-pot fashion, thus constituting a quick approach to oxazine-annulated pyrroles from available starting materials, such as nitroalkenes, olefins, and diazo compounds.
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Affiliation(s)
- Yulia A Antonova
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prosp. 47, Moscow 119991, Russia
| | - Yulia V Nelyubina
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Str. 28, Moscow 119991, Russia
| | - Sema L Ioffe
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prosp. 47, Moscow 119991, Russia
| | - Andrey A Tabolin
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prosp. 47, Moscow 119991, Russia
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2
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Lukoyanov AA, Tabolin AA, Nelyubina YV, Ioffe SL, Sukhorukov AY. Deoxygenative Arylation of 5,6-Dihydro-4 H-1,2-oxazine- N-oxides with Arynes. J Org Chem 2022; 87:6838-6851. [PMID: 35523000 DOI: 10.1021/acs.joc.2c00515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Six-membered cyclic nitronates (5,6-dihydro-4H-1,2-oxazine-N-oxides) react with Kobayashi's aryne precursors producing 3-(2-hydroxyaryl)-substituted 1,2-oxazines via deoxygenative C-H arylation. The process involves a hitherto unknown 1,3-dipolar cycloaddition of nitronate to the aryne to give an unusual tricyclic nitroso acetal, in which the N-O bond of the isoxazoline ring is selectively cleaved upon the action of a base (CsF) or an acid (TFA). The transient cycloadducts were isolated and characterized in some cases. The synthetic potential of the obtained 3-(2-hydroxyaryl)-substituted 1,2-oxazines was demonstrated by their stereoselective reduction to 1,4-amino alcohols and reductive 1,2-oxazine ring contraction to tetrahydrofuran derivatives.
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Affiliation(s)
- Alexander A Lukoyanov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect, 47, Moscow 119991, Russian Federation
| | - Andrey A Tabolin
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect, 47, Moscow 119991, Russian Federation
| | - Yulia V Nelyubina
- A. N. Nesmeyanov Institute of Organoelement Compounds, Vavilov strasse 28, Moscow 119991, Russian Federation
| | - Sema L Ioffe
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect, 47, Moscow 119991, Russian Federation
| | - Alexey Yu Sukhorukov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect, 47, Moscow 119991, Russian Federation
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3
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Malykhin RS, Golovanov IS, Nelyubina YV, Ioffe SL, Sukhorukov AY. Construction of Saturated Oxazolo[3,2- b][1,2]oxazines via Tandem [3+2]-Cycloaddition/[1,3]-Rearrangement of Cyclic Nitronates and Ketenes. J Org Chem 2021; 86:16337-16348. [PMID: 34783561 DOI: 10.1021/acs.joc.1c01744] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Reaction of six-membered cyclic nitronates with disubstituted ketenes affords hitherto unknown saturated oxazolo[3,2-b][1,2]oxazines possessing up to four contiguous stereogenic centers. The process involves a tandem of [3+2]-cycloaddition across the C═O bond of ketene, followed by a spontaneous [1,3]-rearrangement of transient vinylidene-substituted bicyclic nitrosoacetals. DFT calculations of the mechanism suggest that the [1,3]-O,C-shift proceeds through a recyclization of a biradical intermediate formed by an unusually mild homolytic cleavage of the N-O bond. The resulting products can be utilized as precursors of other fused 1,2-oxazines derivatives, in particular 1,2-oxazino-1,2,4-triazin-3-ones.
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Affiliation(s)
- Roman S Malykhin
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991, Leninsky prospect, 47, Moscow, Russian Federation.,Department of Chemistry, M. V. Lomonosov Moscow State University, 119991, Leninskie gory, 1, str. 3, Moscow, Russian Federation
| | - Ivan S Golovanov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991, Leninsky prospect, 47, Moscow, Russian Federation
| | - Yulia V Nelyubina
- A. N. Nesmeyanov Institute of Organoelement Compounds, 119991, Vavilov str. 28, Moscow, Russian Federation
| | - Sema L Ioffe
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991, Leninsky prospect, 47, Moscow, Russian Federation
| | - Alexey Yu Sukhorukov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991, Leninsky prospect, 47, Moscow, Russian Federation
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Das S, Mitschke B, De CK, Harden I, Bistoni G, List B. Harnessing the ambiphilicity of silyl nitronates in a catalytic asymmetric approach to aliphatic β3-amino acids. Nat Catal 2021. [DOI: 10.1038/s41929-021-00714-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
AbstractNitronate anions, formally generated by α-deprotonating the corresponding nitroalkanes, are highly nucleophilic and versatile intermediates in many carbon–carbon bond-forming reactions. In contrast, the corresponding silyl nitronates are ambiphilic and react, at the same carbon atom, with both electrophiles and nucleophiles. However, while their nucleophilicity has been well exploited in catalytic enantioselective reactions with imines and aldehydes, utilizing the electrophilicity of silyl nitronates in asymmetric synthesis has remained elusive. Here we report the facile, efficient and general reactivity of readily available silyl nitronates with silyl ketene acetals, catalysed by highly Lewis-acidic and confined silylium imidodiphosphorimidate catalysts. The products of this reaction, so-called nitroso acetals, are obtained in excellent enantioselectivity and can be easily converted into N-Boc-β3-amino acid esters in a single step.
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Zhang T, Yang Z, Zhou D, Meng F, Han Z, Huang H. Non-metal Lewis acid-catalyzed cross-Claisen condensation for β-keto esters. Org Biomol Chem 2021; 19:9163-9166. [PMID: 34642729 DOI: 10.1039/d1ob01785c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, we disclose a new catalytic and highly chemoselective cross-Claisen condensation of esters. In the presence of TBSNTf2 as a non-metal Lewis acid, various esters can undergo cross-Claisen condensation to form β-keto esters which are important building blocks. Compared with the traditional Claisen condensation, this process, employing silyl ketene acetals (SKAs) as carbonic nucleophiles to achieve cross-Claisen condensation, requires mild conditions and has good tolerance of functional groups.
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Affiliation(s)
- Tianyu Zhang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, China.
| | - Zhenkun Yang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, China.
| | - Dapeng Zhou
- Hangmo New Materials Group Co., Ltd, Anji, China.
| | - Fuliang Meng
- Hangmo New Materials Group Co., Ltd, Anji, China.
| | - Zhengyu Han
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, China.
| | - Hai Huang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, China. .,Hangmo New Materials Group Co., Ltd, Anji, China.
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6
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Malykhin RS, Kokuev AO, Dorokhov VS, Nelyubina YV, Tartakovsky VA, Tabolin AA, Ioffe SL, Sukhorukov AY. Nucleophilic Halogenation of Cyclic Nitronates: A General Access to 3-Halo-1,2-Oxazines. J Org Chem 2019; 84:13794-13806. [PMID: 31595751 DOI: 10.1021/acs.joc.9b02010] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In this article, comprehensive studies on the nucleophilic chlorination and bromination of readily available six-membered cyclic nitronates (1,2-oxazine-N-oxides) are reported. Under optimized conditions (POCl3 or (COBr)2 with Hünig's base), 3-halo-substituted 1,2-oxazines, which are difficult to access by other routes, were obtained in good to high yields. The latter were shown to be convenient precursors to other 3-substituted 1,2-oxazine derivatives using Lewis/Brønsted acid-assisted substitution of the halide atom for C-, S-, and N-nucleophiles.
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Affiliation(s)
- Roman S Malykhin
- N. D. Zelinsky Institute of Organic Chemistry , Russian Academy of Sciences , 119991 , Leninsky prospect, 47 , Moscow , Russian Federation.,Department of Chemistry , M. V. Lomonosov Moscow State University , 119991 , Leninskie gory, 1, str. 3 , Moscow , Russian Federation
| | - Aleksandr O Kokuev
- N. D. Zelinsky Institute of Organic Chemistry , Russian Academy of Sciences , 119991 , Leninsky prospect, 47 , Moscow , Russian Federation.,D. Mendeleev University of Chemical Technology of Russia , 125047 , Miusskaya sq., 9 , Moscow , Russian Federation
| | - Valentin S Dorokhov
- N. D. Zelinsky Institute of Organic Chemistry , Russian Academy of Sciences , 119991 , Leninsky prospect, 47 , Moscow , Russian Federation.,D. Mendeleev University of Chemical Technology of Russia , 125047 , Miusskaya sq., 9 , Moscow , Russian Federation
| | - Yulia V Nelyubina
- A. N. Nesmeyanov Institute of Organoelement Compounds , 119991 , Vavilov str., 28 , Moscow , Russian Federation
| | - Vladimir A Tartakovsky
- N. D. Zelinsky Institute of Organic Chemistry , Russian Academy of Sciences , 119991 , Leninsky prospect, 47 , Moscow , Russian Federation
| | - Andrey A Tabolin
- N. D. Zelinsky Institute of Organic Chemistry , Russian Academy of Sciences , 119991 , Leninsky prospect, 47 , Moscow , Russian Federation
| | - Sema L Ioffe
- N. D. Zelinsky Institute of Organic Chemistry , Russian Academy of Sciences , 119991 , Leninsky prospect, 47 , Moscow , Russian Federation
| | - Alexey Yu Sukhorukov
- N. D. Zelinsky Institute of Organic Chemistry , Russian Academy of Sciences , 119991 , Leninsky prospect, 47 , Moscow , Russian Federation.,D. Mendeleev University of Chemical Technology of Russia , 125047 , Miusskaya sq., 9 , Moscow , Russian Federation.,Plekhanov Russian University of Economics , 117997 , Stremyanny per., 36 , Moscow , Russian Federation
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7
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Ioffe SL, Khoroshutina YA, Smirnov VO, Mikhaylov AA. A New Algorithm for the Reactivity Umpolung of Aliphatic Nitro Compounds. KINETICS AND CATALYSIS 2019. [DOI: 10.1134/s002315841806006x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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8
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Tabolin AA, Sukhorukov AY, Ioffe SL. α-Electrophilic Reactivity of Nitronates. CHEM REC 2018; 18:1489-1500. [PMID: 29667300 DOI: 10.1002/tcr.201800009] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 04/09/2018] [Indexed: 11/10/2022]
Abstract
Chemistry of covalent nitronates regarding nucleophilic addition to C=N bond is described. Various types of electrophilic activation of nitronates and stability of formed products are discussed with main attention paid to authors' work in the area.
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Affiliation(s)
- A A Tabolin
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leniinsky prosp. 47, Moscow, 119991, Russian Federation
| | - A Yu Sukhorukov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leniinsky prosp. 47, Moscow, 119991, Russian Federation
| | - S L Ioffe
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leniinsky prosp. 47, Moscow, 119991, Russian Federation
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9
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Vereshchagin AN. Classical and interdisciplinary approaches to the design of organic and hybrid molecular systems. Russ Chem Bull 2018. [DOI: 10.1007/s11172-017-1950-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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10
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Shved AS, Tabolin AA, Novikov RA, Nelyubina YV, Timofeev VP, Ioffe SL. Six-Membered Cyclic Nitroso Acetals: Synthesis and Studies of the Nitrogen Inversion Process ofN-Silyloxy-3,6-dihydro-2H-1,2-oxazines. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600952] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Alexander S. Shved
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences; Leninsky prosp. 47 119991 Moscow Russian Federation
- Higher Chemical College; D. I. Mendeleev University of Chemical Technology of Russia; Miusskaya sq. 9 125047 Moscow Russian Federation
| | - Andrey A. Tabolin
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences; Leninsky prosp. 47 119991 Moscow Russian Federation
| | - Roman A. Novikov
- V. A. Engelhardt Institute of Molecular Biology; Russian Academy of Sciences; Vavilov str. 32 119991 Moscow Russian Federation
| | - Yulia V. Nelyubina
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; Vavilov str. 28 119991 Moscow Russian Federation
| | - Vladimir P. Timofeev
- V. A. Engelhardt Institute of Molecular Biology; Russian Academy of Sciences; Vavilov str. 32 119991 Moscow Russian Federation
| | - Sema L. Ioffe
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences; Leninsky prosp. 47 119991 Moscow Russian Federation
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Stereoselective reactions of nitro compounds in the synthesis of natural compound analogs and active pharmaceutical ingredients. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.07.067] [Citation(s) in RCA: 95] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Mikhaylov AA, Khomutova YA, Arkhipov DE, Korlyukov AA, Ioffe SL. ButMe2SiOTf-promoted cyanosilylation of six-membered cyclic nitronates with trialkylsilyl cyanides or tert-butyl isocyanide1. MENDELEEV COMMUNICATIONS 2014. [DOI: 10.1016/j.mencom.2014.11.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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13
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Naumova AS, Mikhaylov AA, Khomutova YA, Novikov RA, Arkhipov DE, Korlyukov AA, Ioffe SL. Three-step assembly of 4-aminotetrahydropyran-2-ones from isoxazoline-2-oxides. RSC Adv 2014. [DOI: 10.1039/c3ra47309k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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