1
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Lainer T, Pueschmann SD, Torvisco A, Fischer RC, Flock M, Haas M. Synthesis and Photochemistry of Tris(trimethoxysilyl)acyl-silanes and 1,4-Tetrakis(silyl)-1,4-bisacylsilanes. Organometallics 2024; 43:1713-1725. [PMID: 39210990 PMCID: PMC11351433 DOI: 10.1021/acs.organomet.3c00531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 02/01/2024] [Accepted: 02/05/2024] [Indexed: 09/04/2024]
Abstract
In this contribution, we present the synthesis of two groups of novel acylsilanes 1-6. Compounds 1 and 2 represent tris(trimethoxysilyl)acylsilanes, and compounds 3-6 are 1,4-tetrakis(silyl)-1,4-bisacylsilanes. All isolated compounds were characterized by infrared (IR) and nuclear magnetic resonance (NMR) spectroscopy and X-ray crystallography. Additionally, these compounds were further analyzed by ultraviolet/visible (UV/vis) spectroscopy and their longest wavelength absorption bands were assigned by density functional theory (DFT) calculations. On the basis of the well-known Brook rearrangement of acylsilanes, we irradiated 1-6 in benzene solutions at 405 nm (λ) for several hours. Photolysis of compounds 1 and 2 afforded the same silene rearrangement products as found in previous investigations of structurally related acylsilanes. In addition, trapping experiments with MeOH further support our proposed mechanism for silene formation. The photolysis of tetrakis(trimethylsilyl)bisacylsilane 3 gave rise to the formation of a monosilene intermediate 10; upon prolonged irradiation, the subsequently formed bissilene undergoes a fast dimerization to bicyclic product 11. Interestingly, unlike the expected head-to-head dimerization of Brook-type silenes, this bissilene undergoes a selective head-to-tail dimerization. In contrast, tetrakis(trimethylsilyl)bisacylsilane 4 undergoes a selective and completely stereoselective double CH activation to air stable bicyclic system 12. The mechanism of this rearrangement is fully described by DTF calculations. Unfortunately, tetrakis(trimethoxysilyl)bisacylsilanes 5 and 6 underwent unselective photochemical rearrangements.
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Affiliation(s)
- Thomas Lainer
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9/V, 8010 Graz, Austria
| | - Sabrina D. Pueschmann
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9/V, 8010 Graz, Austria
| | - Ana Torvisco
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9/V, 8010 Graz, Austria
| | - Roland C. Fischer
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9/V, 8010 Graz, Austria
| | - Michaela Flock
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9/V, 8010 Graz, Austria
| | - Michael Haas
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9/V, 8010 Graz, Austria
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2
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Di Terlizzi L, Nicchio L, Protti S, Fagnoni M. Visible photons as ideal reagents for the activation of coloured organic compounds. Chem Soc Rev 2024; 53:4926-4975. [PMID: 38596901 DOI: 10.1039/d3cs01129a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
In recent decades, the traceless nature of visible photons has been exploited for the development of efficient synthetic strategies for the photoconversion of colourless compounds, namely, photocatalysis, chromophore activation, and the formation of an electron donor/acceptor (EDA) complex. However, the use of photoreactive coloured organic compounds is the optimal strategy to boost visible photons as ideal reagents in synthetic protocols. In view of such premises, the present review aims to provide its readership with a collection of recent photochemical strategies facilitated via direct light absorption by coloured molecules. The protocols have been classified and presented according to the nature of the intermediate/excited state achieved during the transformation.
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Affiliation(s)
- Lorenzo Di Terlizzi
- PhotoGreen Lab, Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy.
| | - Luca Nicchio
- PhotoGreen Lab, Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy.
| | - Stefano Protti
- PhotoGreen Lab, Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy.
| | - Maurizio Fagnoni
- PhotoGreen Lab, Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy.
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3
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Patel SS, Gupta S, Tripathi CB. Organocatalyzed Hydroacylation of Enones by Photosensitization of Acyl Silanes. Chem Asian J 2024:e202400240. [PMID: 38600748 DOI: 10.1002/asia.202400240] [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: 03/04/2024] [Revised: 04/10/2024] [Accepted: 04/10/2024] [Indexed: 04/12/2024]
Abstract
A mild protocol for hydroacylation of enones through photosensitization of acyl silanes with thioxanthone under blue light (455 nm) irradiation is reported. A Brønsted acid is used as a cocatalyst in the reaction. The versatility of the method is demonstrated through inter- and intramolecular hydroacylation reaction. The hydroacylation product is applied for synthesizing an anti-HCV agent. Mechanistic insights are also provided through control experiments.
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Affiliation(s)
- Shiv Shankar Patel
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, 226031, India
| | - Samiksha Gupta
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, 226031, India
| | - Chandra Bhushan Tripathi
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, 226031, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
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4
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Atkin L, Ross HJ, Priebbenow DL. Acylsilanes in Transition-Metal-Catalyzed and Photochemical Reactions: Clarifying Product Formation. J Org Chem 2023; 88:14205-14209. [PMID: 37738455 DOI: 10.1021/acs.joc.3c01454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/24/2023]
Abstract
Acylsilanes are able to react as nucleophilic carbene precursors, electrophiles, and directing groups in C-H functionalization. To date, some of the products reportedly formed during transition-metal-catalyzed and photochemical reactions involving acylsilanes have been incorrectly assigned. To provide clarity, we herein address these structural misassignments and detail the revised structures. New insights into the reactivity of acylsilanes were also afforded via the discovery that light-induced siloxy carbenes participate in intramolecular 1,2-carbonyl addition to proximal esters.
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Affiliation(s)
- Liselle Atkin
- Department of Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia
| | - Hannah J Ross
- Department of Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia
| | - Daniel L Priebbenow
- Department of Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia
- School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia
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5
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Sang X, Mo Y, Li S, Liu X, Cao W, Feng X. Bimetallic tandem catalysis-enabled enantioselective cycloisomerization/carbonyl-ene reaction for construction of 5-oxazoylmethyl α-silyl alcohol. Chem Sci 2023; 14:8315-8320. [PMID: 37564412 PMCID: PMC10411629 DOI: 10.1039/d3sc01048a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 07/06/2023] [Indexed: 08/12/2023] Open
Abstract
A bimetallic tandem catalysis-enabled enantioselective cycloisomerization/carbonyl-ene reaction was developed. The reaction proceeded well with a broad range of N-propargylamides and acylsilanes, affording the target chiral 5-oxazoylmethyl α-silyl alcohols in up to 95% yield and 99% ee under mild conditions. Importantly, this facile protocol was available for the late-stage modification of several bioactive molecules. Based on the mechanistic study and control experiments, a possible catalytic cycle and transition state are proposed to elucidate the reaction process and enantioinduction.
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Affiliation(s)
- Xinpeng Sang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 P. R. China
| | - Yuhao Mo
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 P. R. China
| | - Shiya Li
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 P. R. China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 P. R. China
| | - Weidi Cao
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 P. R. China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 P. R. China
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6
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Vale J, Gomes RF, Afonso CAM, Candeias NR. Functionalized Cyclopentenes via the Formal [4+1] Cycloaddition of Photogenerated Siloxycarbenes from Acyl Silanes. J Org Chem 2022; 87:8910-8920. [PMID: 35736215 PMCID: PMC9776530 DOI: 10.1021/acs.joc.2c00591] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
This work describes the first formal cycloaddition reaction of photogenerated nucleophilic carbenes derived from acylsilanes with electrophilic dienes. The resulting transient donor-acceptor cyclopropane rearranges to its stable and highly functionalized cyclopentene isomer in an unprecedented metal-free process. The cyclopropanation-vinyl cyclopropane rearrangement sequence was corroborated by computational calculations. The cyclopropane formation corresponds to a higher energetic barrier, and the vinylcyclopropane-cyclopentene rearrangement proceeds through different mechanisms, although of comparable energies, depending on the stereochemistry of the cyclopropane.
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Affiliation(s)
- João
R. Vale
- iMed.ULisboa,
Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, Lisbon 1649-003, Portugal,Faculty
of Engineering and Natural Sciences, Tampere
University, Korkeakoulunkatu 8, Tampere 33101, Finland
| | - Rafael F. Gomes
- iMed.ULisboa,
Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, Lisbon 1649-003, Portugal
| | - Carlos A. M. Afonso
- iMed.ULisboa,
Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, Lisbon 1649-003, Portugal,
| | - Nuno R. Candeias
- Faculty
of Engineering and Natural Sciences, Tampere
University, Korkeakoulunkatu 8, Tampere 33101, Finland,LAQV-REQUIMTE,
Department of Chemistry, University of Aveiro, Aveiro 3810-193, Portugal,
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7
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Noji M, Ishimaru S, Obata H, Kumaki A, Seki T, Hayashi S, Takanami T. Facile electrochemical synthesis of silyl acetals: An air-stable precursor to formylsilane. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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8
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Zhang Y, Zhou G, Gong X, Guo Z, Qi X, Shen X. Diastereoselective Transfer of Tri(di)fluoroacetylsilanes-Derived Carbenes to Alkenes. Angew Chem Int Ed Engl 2022; 61:e202202175. [PMID: 35415937 DOI: 10.1002/anie.202202175] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Indexed: 01/04/2023]
Abstract
Stereoselective cyclopropanation reaction of alkenes is usually achieved by metal complexes via singlet-metal-carbene intermediates. However, previous transition-metal-catalyzed cyclopropanation of alkenes with acylsilanes afforded low diastereoselectivity. Herein, we report the first visible-light-induced transition-metal-free cyclopropanation reaction of terminal alkenes with trifluoroacetylsilanes and difluoroacetylsilanes. Both aromatic and aliphatic alkenes as well as electron-deficient alkenes are suitable substrates for the highly cis-selective [2+1] cyclization reaction. A combination of experimental and computational studies identified triplet carbenes as being key intermediates in this transformation. The gram scale reaction and late-stage functionalization demonstrated the synthetic potential of this strategy.
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Affiliation(s)
- Yizhi Zhang
- Institute for Advanced Studies, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Wuhan University, 299 Bayi Road, Wuhan, Hubei 430072, China
| | - Gang Zhou
- Institute for Advanced Studies, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Wuhan University, 299 Bayi Road, Wuhan, Hubei 430072, China
| | - Xingxing Gong
- Institute for Advanced Studies, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Wuhan University, 299 Bayi Road, Wuhan, Hubei 430072, China
| | - Zhuanzhuan Guo
- Institute for Advanced Studies, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Wuhan University, 299 Bayi Road, Wuhan, Hubei 430072, China
| | - Xiaotian Qi
- Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, 299 Bayi Road, Wuhan, Hubei 430072, China
| | - Xiao Shen
- Institute for Advanced Studies, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Wuhan University, 299 Bayi Road, Wuhan, Hubei 430072, China
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9
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Zhou G, Shen X. Visible-Light-Induced Organocatalyzed [2+1] Cyclization of Alkynes and Trifluoroacetylsilanes. Synlett 2022. [DOI: 10.1055/a-1840-5199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The synthesis of common cyclopropenes has been widely studied, but the synthesis of cyclopropenols is a significant challenge. Herein, we highlight our recent work on the synthesis of trifluoromethylated cyclopropenols through [2+1] cycloaddition reaction between alkynes and trifluoroacetylsilanes under visible-light-induced organocatalysis. The novel amphiphilic donor-acceptor carbenes derived from trifluoroacetylsilanes can react effectively with both activated and unactivated alkynes. Broad substrate scope and good functional group tolerance have been achieved. Besides, the synthetic potential of this reaction was highlighted by a gram-scale reaction and the one-pot diastereoselective synthesis of trifluoromethylated cyclopropanols.
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10
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Zhang Y, Zhou G, Gong X, Guo Z, Qi X, Shen X. Diastereoselective Transfer of Tri(di)fluoroacetylsilanes‐Derived Carbenes to Alkenes. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202202175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yizhi Zhang
- Institute for Advanced Studies Engineering Research Center of Organosilicon Compounds & Materials Ministry of Education Wuhan University 299 Bayi Road Wuhan Hubei 430072 China
| | - Gang Zhou
- Institute for Advanced Studies Engineering Research Center of Organosilicon Compounds & Materials Ministry of Education Wuhan University 299 Bayi Road Wuhan Hubei 430072 China
| | - Xingxing Gong
- Institute for Advanced Studies Engineering Research Center of Organosilicon Compounds & Materials Ministry of Education Wuhan University 299 Bayi Road Wuhan Hubei 430072 China
| | - Zhuanzhuan Guo
- Institute for Advanced Studies Engineering Research Center of Organosilicon Compounds & Materials Ministry of Education Wuhan University 299 Bayi Road Wuhan Hubei 430072 China
| | - Xiaotian Qi
- Engineering Research Center of Organosilicon Compounds & Materials Ministry of Education College of Chemistry and Molecular Sciences Wuhan University 299 Bayi Road Wuhan Hubei 430072 China
| | - Xiao Shen
- Institute for Advanced Studies Engineering Research Center of Organosilicon Compounds & Materials Ministry of Education Wuhan University 299 Bayi Road Wuhan Hubei 430072 China
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11
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Zhou G, Shen X. Synthesis of Cyclopropenols Enabled by Visible-Light-Induced Organocatalyzed [2+1] Cyclization. Angew Chem Int Ed Engl 2022; 61:e202115334. [PMID: 34994996 DOI: 10.1002/anie.202115334] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Indexed: 12/28/2022]
Abstract
Although the synthesis of common cyclopropenes has been well studied, the access to cyclopropenols is rather limited. Herein, we report the first synthesis of α-trifluoromethylated cyclopropenols via 2+1 cycloaddition reactions between alkynes and trifluoroacylsilanes, enabled by visible-light-induced organocatalysis. The novel ambiphilic donor-acceptor carbenes derived from trifluoroacetylsilanes reacted efficiently with both activated and non-activated alkynes. The reaction features simple operation, mild conditions, broad substrate scope and good functional group tolerance. The synthetic potential of the reaction is highlighted by the gram-scale reactions and first synthesis of α-trifluoromethylated cyclopropanols through the combination of the 2+1 cyclization and high diastereoselective hydrogenation reaction in one pot.
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Affiliation(s)
- Gang Zhou
- Institute for Advanced Studies, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Wuhan University, 299 Bayi Road, Wuhan, Hubei, 430072, China
| | - Xiao Shen
- Institute for Advanced Studies, Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, Wuhan University, 299 Bayi Road, Wuhan, Hubei, 430072, China
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12
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Zhou G, Shen X. Synthesis of Cyclopropenols Enabled by Visible‐Light‐Induced Organocatalyzed [2+1] Cyclization. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202115334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Gang Zhou
- Wuhan University Institute for Advanced Studies CHINA
| | - Xiao Shen
- Wuhan University Institute for Advanced Studies 299 Bayi Road 430072 Wuhan CHINA
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13
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Atkin L, Priebbenow DL. Cobalt-catalysed acyl silane directed ortho C–H functionalisation of benzoyl silanes. Chem Commun (Camb) 2022; 58:12604-12607. [DOI: 10.1039/d2cc05350k] [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
Acyl silanes can be engaged as weakly coordinating directing groups in cobalt catalysed C–H functionalisation reactions to prepare benzoyl silanes that are highly amenable to subsequent synthetic manipulations yet inaccessible via existing methods.
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Affiliation(s)
- Liselle Atkin
- Department of Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, 3052, Victoria, Australia
| | - Daniel L. Priebbenow
- Department of Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, 3052, Victoria, Australia
- School of Chemistry, University of Melbourne, Parkville, 3010, Victoria, Australia
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14
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Bunyamin A, Hua C, Polyzos A, Priebbenow DL. Intramolecular Photochemical [2+1]-Cycloadditions of Nucleophilic Siloxy Carbenes. Chem Sci 2022; 13:3273-3280. [PMID: 35414869 PMCID: PMC8926286 DOI: 10.1039/d2sc00203e] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 02/24/2022] [Indexed: 11/21/2022] Open
Abstract
Visible light induced singlet nucleophilic carbenes undergo rapid [2 + 1]-cycloaddition with tethered olefins to afford unique bicyclo[3.1.0]hexane and bicyclo[4.1.0]heptane scaffolds. This cyclopropanation process requires only visible light irradiation to proceed, circumventing the use of exogenous (photo)catalysts, sensitisers or additives and showcases a vastly underexplored mode of reactivity for nucleophilic carbenes in chemical synthesis. The discovery of additional transformations including a cyclopropanation/retro-Michael/Michael cascade process to afford chromanones and a photochemical C–H insertion reaction are also described. Visible light induced singlet nucleophilic carbenes undergo rapid [2 + 1]-cycloaddition with tethered olefins to afford unique bicyclo[3.1.0]hexane and bicyclo[4.1.0]heptane scaffolds.![]()
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Affiliation(s)
- Amanda Bunyamin
- School of Chemistry, University of Melbourne Parkville Victoria 3010 Australia
| | - Carol Hua
- School of Chemistry, University of Melbourne Parkville Victoria 3010 Australia
- School of Life and Environmental Sciences, Deakin University Waurn Ponds Victoria 3216 Australia
| | - Anastasios Polyzos
- School of Chemistry, University of Melbourne Parkville Victoria 3010 Australia
- CSIRO Manufacturing Clayton Victoria 3168 Australia
| | - Daniel L Priebbenow
- School of Chemistry, University of Melbourne Parkville Victoria 3010 Australia
- Department of Medicinal Chemistry, Monash Institute of Pharmaceutical Science, Monash University Parkville Victoria 3052 Australia
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15
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Marchenko A, Koidan G, Hurieva A, Shvydenko K, Rozhenko AB, Rusanov EB, Kyrylchuk AA, Kostyuk A. Latent Nucleophilic Carbenes. J Org Chem 2021; 87:373-385. [PMID: 34898214 DOI: 10.1021/acs.joc.1c02397] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Using DFT and ab initio calculations, we demonstrate that noncyclic formamidines can undergo thermal rearrangement into their isomeric aminocarbenes under rather mild conditions. We synthesized the silylformamidine, for which the lowest activation energy in this process was predicted. Experimental studies proved it to serve as a very reactive nucleophilic carbene. The reactions with acetylenes, benzenes, and trifluoromethane proceeded via insertion into sp, sp2, and sp3 CH bonds. The carbene also reacted with the functional groups, such as CHO, COR, and CN at double or triple bonds, displaying high mobility of the trimethylsilyl group. The obtained silylformamidine can be considered as a latent nucleophilic carbene. It can be prepared in bulk quantities, stored, and used when the need arises. Calculation results predict similar behavior for some other silylated formamidines and related compounds.
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Affiliation(s)
- Anatoliy Marchenko
- Department of Organophosphorus Chemistry, Institute of Organic Chemistry, Murmanska 5, Kyiv 02660, Ukraine
| | - Georgyi Koidan
- Department of Organophosphorus Chemistry, Institute of Organic Chemistry, Murmanska 5, Kyiv 02660, Ukraine
| | - Anastasiya Hurieva
- Department of Organophosphorus Chemistry, Institute of Organic Chemistry, Murmanska 5, Kyiv 02660, Ukraine
| | - Kostiantyn Shvydenko
- Department of Organophosphorus Chemistry, Institute of Organic Chemistry, Murmanska 5, Kyiv 02660, Ukraine
| | - Alexander B Rozhenko
- Igor Sikorsky Kyiv Polytechnic Institute, National Technical University of Ukraine, Prosp. Peremohy 37, Kyiv 03056, Ukraine.,Department of Physicochemical Investigations, Institute of Organic Chemistry, Murmanska 5, Kyiv 02660, Ukraine
| | - Eduard B Rusanov
- Department of Physicochemical Investigations, Institute of Organic Chemistry, Murmanska 5, Kyiv 02660, Ukraine
| | - Andrii A Kyrylchuk
- Department of Physicochemical Investigations, Institute of Organic Chemistry, Murmanska 5, Kyiv 02660, Ukraine
| | - Aleksandr Kostyuk
- Department of Organophosphorus Chemistry, Institute of Organic Chemistry, Murmanska 5, Kyiv 02660, Ukraine
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16
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Chandrasekaran R, Pulikkottil FT, Elama KS, Rasappan R. Direct synthesis and applications of solid silylzinc reagents. Chem Sci 2021; 12:15719-15726. [PMID: 35003603 PMCID: PMC8654096 DOI: 10.1039/d1sc06038d] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Accepted: 11/19/2021] [Indexed: 01/29/2023] Open
Abstract
The increased synthetic utility of organosilanes has motivated researchers to develop milder and more practical synthetic methods. Silylzinc reagents, which are typically the most functional group tolerant, are notoriously difficult to synthesize because they are obtained by a pyrophoric reaction of silyllithium, particularly Me3SiLi which is itself prepared by the reaction of MeLi and disilane. Furthermore, the dissolved LiCl in silylzinc may have a detrimental effect. A synthetic method that can avoid silyllithium and involves a direct synthesis of silylzinc reagents from silyl halides is arguably the simplest and most economical strategy. We describe, for the first time, the direct synthesis of PhMe2SiZnI and Me3SiZnI reagents by employing a coordinating TMEDA ligand, as well as single crystal XRD structures. Importantly, they can be obtained as solids and stored for longer periods at 4 °C. We also demonstrate their significance in cross-coupling of various free alkyl/aryl/alkenyl carboxylic acids with broader functional group tolerance and API derivatives. The general applicability and efficiency of solid Me3SiZnI are shown in a wide variety of reactions including alkylation, arylation, allylation, 1,4-addition, acylation and more.
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Affiliation(s)
- Revathi Chandrasekaran
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram Vithura Thiruvananthapuram Kerala 695551 India
| | - Feba Thomas Pulikkottil
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram Vithura Thiruvananthapuram Kerala 695551 India
| | - Krishna Suresh Elama
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram Vithura Thiruvananthapuram Kerala 695551 India
| | - Ramesh Rasappan
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram Vithura Thiruvananthapuram Kerala 695551 India
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17
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Priebbenow DL, Hua C. Acyl silane directed Cp*Rh(III)-catalysed alkylation/annulation reactions. Chem Commun (Camb) 2021; 57:7938-7941. [PMID: 34286753 DOI: 10.1039/d1cc03051e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Studies into the Cp*Rh(iii)-catalysed hydroarylation of alkenes with aryl acyl silanes led to the discovery of a new synthetic strategy to access unique silicon derived indene frameworks. Rather than protodemetalation of the metal enolate formed following insertion of an alkene into the aryl C-H bond, intramolecular aldol condensation of the acyl silane occurred to generate a series of 2-formyl- and 2-acetyl-3-silyl indenes. This represents only the second example of rhodium-catalysed C-H functionalisation employing acyl silanes as weakly coordinating directing groups and the intramolecular aldol condensation strategy was extended to access analogous silicon derived benzofurans.
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Affiliation(s)
- Daniel L Priebbenow
- School of Chemistry, The University of Melbourne, Parkville, Victoria, 3010, Australia.
| | - Carol Hua
- School of Chemistry, The University of Melbourne, Parkville, Victoria, 3010, Australia.
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18
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Yu F, Shen W, Sun Y, Liao Y, Jin S, Lu X, He R, Zhong L, Zhong G, Zhang J. Ruthenium-catalyzed C-H amination of aroylsilanes. Org Biomol Chem 2021; 19:6313-6321. [PMID: 34212972 DOI: 10.1039/d1ob00935d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Acylsilane represents a valuable synthon in synthetic chemistry. We report on ruthenium(ii)-catalyzed ortho-C-H amination of aroylsilanes to provide facile access to synthetically useful imidobenzoylsilanes and tosyl-amidobenzoylsilanes. The protocols, with broad substrate scope and excellent functional group tolerance, are enabled with the weak chelation-assistance of acylsilane via C-H cyclometallation.
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Affiliation(s)
- Feifei Yu
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China.
| | - Wenzhou Shen
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China.
| | - Yaling Sun
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China.
| | - Yilei Liao
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China.
| | - Shuqi Jin
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China.
| | - Xiunan Lu
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China.
| | - Rui He
- Department of Stomatology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou Normal University, Hangzhou, 310015, China.
| | - Liangjun Zhong
- Department of Stomatology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou Normal University, Hangzhou, 310015, China.
| | - Guofu Zhong
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China.
| | - Jian Zhang
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China. and Department of Stomatology, The Affiliated Hospital of Hangzhou Normal University, Hangzhou Normal University, Hangzhou, 310015, China.
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19
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Yang Z, Zhou H, He M, Li J, Yang Z, Wu Y. One‐pot Synthesis of 3‐Acylsilane‐Substituted Isoquinolines via Rhodium (III)‐Catalyzed C−H Activation/Annulation of
O
‐pivaloyl Oximes With Acryloylsilanes. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100254] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Zengbao Yang
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University No. 17 Southern Renmin Road 610041 Chengdu Sichuan P. R. China
| | - Hui Zhou
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University No. 17 Southern Renmin Road 610041 Chengdu Sichuan P. R. China
| | - Maoyao He
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University No. 17 Southern Renmin Road 610041 Chengdu Sichuan P. R. China
| | - Jianglian Li
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University No. 17 Southern Renmin Road 610041 Chengdu Sichuan P. R. China
| | - Zhongzhen Yang
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University No. 17 Southern Renmin Road 610041 Chengdu Sichuan P. R. China
| | - Yong Wu
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology West China School of Pharmacy Sichuan University No. 17 Southern Renmin Road 610041 Chengdu Sichuan P. R. China
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20
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Wei M, Li C, Yan Z, Hu Z, Dong L, Zhang J, Wang X, Li Y, Zhang H. Activated Microglia Exosomes Mediated miR-383-3p Promotes Neuronal Necroptosis Through Inhibiting ATF4 Expression in Intracerebral Hemorrhage. Neurochem Res 2021; 46:1337-1349. [PMID: 33594583 DOI: 10.1007/s11064-021-03268-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 01/25/2021] [Accepted: 02/03/2021] [Indexed: 10/22/2022]
Abstract
Intracerebral hemorrhage (ICH) is the second largest type of stroke, with high mortality and morbidity, and most patients have severe sequelae. Brain injury induced by ICH includes primary damage and secondary damage, and the secondary brain injury is the main reason of neurological impairment. The hallmark of secondary brain injury is cell death. Necroptosis is a type of the cell death and plays vital roles in various neurological diseases, but the roles of necroptosis in ICH are still not fully known. Microglia cell is the type of immune cell, plays protective roles in nerve damage and modulates the activity of neurons through secreting exosomes. Exosome-contained miRNAs are also involved in the regulating neuronal activity. However, the roles and the mechanisms of microglia-secreted exosomes miRNAs in ICH neurons necroptosis need to further explore. In this study, ICH model was construct in rats and cells. Injury of cells in brain was detected by PI staining. Necroptosis in rats and cells was detected by western blot and flow cytometry. The expression of miR-383-3p was detected by RT-qPCR. The roles of activated microglia-secreted exosomes and exosome-contained miR-383-3p were detected through co-culturing medium or exosomes with neurons. The target gene of miR-383-3p was determined by luciferase assay and the expression of target gene was detected by western blot. Rescue experiments were used to confirm the mechanism of miR-383-3p in neurons necroptosis. The miR-383-3p role was verified in vivo through injecting miR-383-3p mimic into ICH rats. Here, we found that the necroptosis of neurons was increased in ICH rats through detecting the expression of RIP1 and RIP3 and PI staining. Microglia that activated by ICH promote neurons necroptosis through secreting exosomes and transferring miR-383-3p into neurons. In mechanism, miR-383-3p negatively regulated the expression of ATF4 and then promoted the necroptosis of neurons. Overall, our results provide a novel molecular basis to neurons necroptosis in ICH and may provide a new strategy to retard the secondary brain injury of ICH.
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Affiliation(s)
- Min Wei
- Department of Neurosurgery, Clinical Medical College, Yangzhou University, No. 98 of Nantong West Road, Yangzhou, 225001, Jiangsu Province, China
| | - Chen Li
- Department of Neurosurgery, Clinical Medical College, Yangzhou University, No. 98 of Nantong West Road, Yangzhou, 225001, Jiangsu Province, China
| | - Zhengcun Yan
- Department of Neurosurgery, Clinical Medical College, Yangzhou University, No. 98 of Nantong West Road, Yangzhou, 225001, Jiangsu Province, China
| | - Zhengwei Hu
- Department of Neurosurgery, Clinical Medical College, Yangzhou University, No. 98 of Nantong West Road, Yangzhou, 225001, Jiangsu Province, China
| | - Lun Dong
- Department of Neurosurgery, Clinical Medical College, Yangzhou University, No. 98 of Nantong West Road, Yangzhou, 225001, Jiangsu Province, China
| | - Jun Zhang
- Department of Neurosurgery, Clinical Medical College, Yangzhou University, No. 98 of Nantong West Road, Yangzhou, 225001, Jiangsu Province, China
| | - Xingdong Wang
- Department of Neurosurgery, Clinical Medical College, Yangzhou University, No. 98 of Nantong West Road, Yangzhou, 225001, Jiangsu Province, China
| | - Yuping Li
- Department of Neurosurgery, Clinical Medical College, Yangzhou University, No. 98 of Nantong West Road, Yangzhou, 225001, Jiangsu Province, China
| | - Hengzhu Zhang
- Department of Neurosurgery, Clinical Medical College, Yangzhou University, No. 98 of Nantong West Road, Yangzhou, 225001, Jiangsu Province, China.
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21
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Ye J, Bellotti P, Paulisch TO, Daniliuc CG, Glorius F. Durch sichtbares Licht vermittelte Cycloadditionen von α‐Ketoacylsilanen mit Iminen: Einfache Synthese von β‐Lactamen. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202102451] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jian‐Heng Ye
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| | - Peter Bellotti
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| | - Tiffany O. Paulisch
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| | - Constantin G. Daniliuc
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| | - Frank Glorius
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
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22
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Ye JH, Bellotti P, Paulisch TO, Daniliuc CG, Glorius F. Visible-Light-Induced Cycloaddition of α-Ketoacylsilanes with Imines: Facile Access to β-Lactams. Angew Chem Int Ed Engl 2021; 60:13671-13676. [PMID: 33729650 DOI: 10.1002/anie.202102451] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 03/09/2021] [Indexed: 11/06/2022]
Abstract
We report the synthesis of β-lactams from α-ketoacylsilanes and imines, which proceeds via a formal [2+2] photochemical cycloaddition with in situ generation of siloxyketene. This mild and operationally simple reaction proceeds in an atom-economic fashion with broad substrate scope, including aldimines, ketimines, hydrazones, and fused nitrogen heterocycles, affording a variety of important β-lactams with satisfactory diastereoselectivities in most cases. This reaction also features good functional-group tolerance, facile scalability and product diversification. Experimental and computational studies suggest that α-ketoacylsilanes can serve as photochemical precursors by engaging in a 1,3 silicon shift to the distal carbonyl group.
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Affiliation(s)
- Jian-Heng Ye
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Peter Bellotti
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Tiffany O Paulisch
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Constantin G Daniliuc
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Frank Glorius
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149, Münster, Germany
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23
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Priebbenow DL, Pilkington RL, Hearn KN, Polyzos A. Fluorinated Ketones as Trapping Reagents for Visible-Light-Induced Singlet Nucleophilic Carbenes. Org Lett 2021; 23:2783-2789. [PMID: 33733797 DOI: 10.1021/acs.orglett.1c00708] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Singlet nucleophilic carbenes (SNCs) containing only one heteroatom donor remain underutilized in chemical synthesis. We recently discovered that visible-light-induced SNC intermediates can be trapped by fluorinated ketones via 1,2-carbonyl addition to afford benzoin-type products. This discovery represents a rare example of nucleophilic carbenes reacting with ketones and delivers an efficient, user-friendly, and scalable process for accessing fluorinated tertiary alcohol derivatives driven only by light circumventing the use of exogenous catalysts or additives.
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Affiliation(s)
- Daniel L Priebbenow
- School of Chemistry, The University of Melbourne, Parkville 3010, Victoria, Australia
| | - Rowan L Pilkington
- School of Chemistry, The University of Melbourne, Parkville 3010, Victoria, Australia
| | - Kyle N Hearn
- STEM College, RMIT University, Melbourne 3000, Victoria, Australia
| | - Anastasios Polyzos
- School of Chemistry, The University of Melbourne, Parkville 3010, Victoria, Australia.,CSIRO Manufacturing, Research Way, Clayton 3168, Victoria, Australia
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24
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Ma L, Yu Y, Xin L, Zhu L, Xia J, Ou P, Huang X. Visible Light Enabled Formal Cross Silyl Benzoin Reaction as an Access to α‐Hydroxyketones. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100186] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Liyao Ma
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology Center for Excellence in Molecular Synthesis Fujian Institute of Research on the Structure of Matter Fujian College Chinese Academy of Sciences Fuzhou Fujian 350002 People's Republic of China
- College of Chemistry Fuzhou University Fuzhou 350116 People's Republic of China
| | - Yinghua Yu
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology Center for Excellence in Molecular Synthesis Fujian Institute of Research on the Structure of Matter Fujian College Chinese Academy of Sciences Fuzhou Fujian 350002 People's Republic of China
| | - Luoting Xin
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology Center for Excellence in Molecular Synthesis Fujian Institute of Research on the Structure of Matter Fujian College Chinese Academy of Sciences Fuzhou Fujian 350002 People's Republic of China
| | - Lei Zhu
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology Center for Excellence in Molecular Synthesis Fujian Institute of Research on the Structure of Matter Fujian College Chinese Academy of Sciences Fuzhou Fujian 350002 People's Republic of China
| | - Jiajin Xia
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology Center for Excellence in Molecular Synthesis Fujian Institute of Research on the Structure of Matter Fujian College Chinese Academy of Sciences Fuzhou Fujian 350002 People's Republic of China
| | - Pengcheng Ou
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology Center for Excellence in Molecular Synthesis Fujian Institute of Research on the Structure of Matter Fujian College Chinese Academy of Sciences Fuzhou Fujian 350002 People's Republic of China
- College of Chemistry Fuzhou University Fuzhou 350116 People's Republic of China
| | - Xueliang Huang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research Ministry of Education of China Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province College of Chemistry and Chemical Engineering Hunan Normal University Changsha Hunan 410081 People's Republic of China
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology Center for Excellence in Molecular Synthesis Fujian Institute of Research on the Structure of Matter Fujian College Chinese Academy of Sciences Fuzhou Fujian 350002 People's Republic of China
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25
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Fan Z, Yi Y, Chen S, Xi C. Visible-Light-Induced Catalyst-Free Carboxylation of Acylsilanes with Carbon Dioxide. Org Lett 2021; 23:2303-2307. [DOI: 10.1021/acs.orglett.1c00435] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhengning Fan
- MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, People’s Republic of China
| | - Yaping Yi
- MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, People’s Republic of China
| | - Shenhao Chen
- MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, People’s Republic of China
| | - Chanjuan Xi
- MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, People’s Republic of China
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
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26
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Lu X, Zhang J, Xu L, Shen W, Yu F, Ding L, Zhong G. Ruthenium-Catalyzed Brook Rearrangement Involved Domino Sequence Enabled by Acylsilane-Aldehyde Corporation. Org Lett 2020; 22:5610-5616. [PMID: 32633529 DOI: 10.1021/acs.orglett.0c01983] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A ruthenium-catalyzed [1,2]-Brook rearrangement involved domino sequence is presented to prepare highly functionalized silyloxy indenes with atomic- and step-economy. This domino reaction is triggered by acylsilane-directed C-H activation, and the aldehyde controlled the subsequent enol cyclization/Brook Rearrangement other than β-H elimination. The protocol tolerates a broad substitution pattern, and the further synthetic elaboration of silyloxy indenes allows access to a diverse range of interesting indene and indanone derivatives.
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Affiliation(s)
- Xiunan Lu
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China
| | - Jian Zhang
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China
| | - Liangyao Xu
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China
| | - Wenzhou Shen
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China
| | - Feifei Yu
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China
| | - Liyuan Ding
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China
| | - Guofu Zhong
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, China
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27
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Priebbenow DL. Silicon‐Derived Singlet Nucleophilic Carbene Reagents in Organic Synthesis. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000279] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Daniel L. Priebbenow
- School of ChemistryThe University of Melbourne Parkville, Victoria Australia 3010
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28
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Ishida K, Yamazaki H, Hagiwara C, Abe M, Kusama H. Efficient Generation and Synthetic Applications of Alkyl‐Substituted Siloxycarbenes: Suppression of Norrish‐Type Fragmentations of Alkanoylsilanes by Triplet Energy Transfer. Chemistry 2020; 26:1249-1253. [DOI: 10.1002/chem.201904635] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Indexed: 12/21/2022]
Affiliation(s)
- Kento Ishida
- Department of ChemistryFaculty of ScienceGakushuin University 1-5-1 Mejiro, Toshima-ku Tokyo 171-8588 Japan
| | - Hokuto Yamazaki
- Department of ChemistryFaculty of ScienceGakushuin University 1-5-1 Mejiro, Toshima-ku Tokyo 171-8588 Japan
| | - Chihiro Hagiwara
- Department of ChemistryFaculty of ScienceGakushuin University 1-5-1 Mejiro, Toshima-ku Tokyo 171-8588 Japan
| | - Manabu Abe
- Department of ChemistryGraduate School of ScienceHiroshima University 1-3-1 Kagamiyama Higashi-Hiroshima Hiroshima 739-8526 Japan
| | - Hiroyuki Kusama
- Department of ChemistryFaculty of ScienceGakushuin University 1-5-1 Mejiro, Toshima-ku Tokyo 171-8588 Japan
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29
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Tatsumi K, Tanabe S, Tsuji Y, Fujihara T. Zinc-Catalyzed Synthesis of Acylsilanes Using Carboxylic Acids and a Silylborane in the Presence of Pivalic Anhydride. Org Lett 2019; 21:10130-10133. [DOI: 10.1021/acs.orglett.9b04151] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kenta Tatsumi
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Sae Tanabe
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Yasushi Tsuji
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Tetsuaki Fujihara
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
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