1
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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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2
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Yuan PF, Yang Z, Zhang SS, Zhu CM, Yang XL, Meng QY. Deconstructive Carboxylation of Activated Alkenes with Carbon Dioxide. Angew Chem Int Ed Engl 2023:e202313030. [PMID: 38072915 DOI: 10.1002/anie.202313030] [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: 09/04/2023] [Indexed: 12/22/2023]
Abstract
Carboxylation with carbon dioxide (CO2 ) represents one notable methodology to produce carboxylic acids. In contrast to carbon-heteroatom bonds, carbon-carbon bond cleavage for carboxylation with CO2 is far more challenging due to their inherent and less favorable orbital directionality for interacting with transition metals. Here we report a photocatalytic protocol for the deconstructive carboxylation of alkenes with CO2 to generate carboxylic acids in the absence of transition metals. It is emphasized that our protocol provides carboxylic acids with obviously unchanged carbon numbers when terminal alkenes were used. To show the power of this strategy, a variety of pharmaceutically relevant applications including the modular synthesis of propionate nonsteroidal anti-inflammatory drugs and the late-stage carboxylation of bioactive molecule derivatives are demonstrated.
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Affiliation(s)
- Pan-Feng Yuan
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 (P. R., China
| | - Zhao Yang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 (P. R., China
- Key Laboratory of Chemical Biology of Hebei Province, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education and College of Chemistry and Environmental Science, Hebei University, Baoding, 071002, P. R. China
| | - Shan-Shan Zhang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 (P. R., China
- Key Laboratory of Chemical Biology of Hebei Province, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education and College of Chemistry and Environmental Science, Hebei University, Baoding, 071002, P. R. China
| | - Can-Ming Zhu
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 (P. R., China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xiu-Long Yang
- Key Laboratory of Chemical Biology of Hebei Province, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education and College of Chemistry and Environmental Science, Hebei University, Baoding, 071002, P. R. China
| | - Qing-Yuan Meng
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190 (P. R., China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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3
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Zaitseva ER, Opryshko VE, Ivanov DS, Mikhaylov AA, Smirnov AY, Baranov MS. Synthesis of chroman-annulated cyclopropanols via photoinduced intramolecular [2 + 1]-cycloaddition of 2-allyloxybenzaldehydes. Org Biomol Chem 2023; 21:9082-9085. [PMID: 37942901 DOI: 10.1039/d3ob01520c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Abstract
2-Allyloxybenzaldehydes undergo [2 + 1] cycloadditions under 365 nm LED irradiation to form the corresponding chroman-fused cyclopropanols. The reaction proceeds easily without any catalysts or additives in dimethyl sulfoxide.
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Affiliation(s)
- Elvira R Zaitseva
- Institute of Bioorganic Chemistry Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117997, Moscow, Russia.
| | - Victoria E Opryshko
- Institute of Bioorganic Chemistry Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117997, Moscow, Russia.
| | - Dmitrii S Ivanov
- Institute of Bioorganic Chemistry Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117997, Moscow, Russia.
| | - Andrey A Mikhaylov
- Institute of Bioorganic Chemistry Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117997, Moscow, Russia.
| | - Alexander Yu Smirnov
- Institute of Bioorganic Chemistry Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117997, Moscow, Russia.
- Pirogov Russian National Research Medical University, Ostrovitianov 1, 117997, Moscow, Russia
| | - Mikhail S Baranov
- Institute of Bioorganic Chemistry Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117997, Moscow, Russia.
- Pirogov Russian National Research Medical University, Ostrovitianov 1, 117997, Moscow, Russia
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4
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Zhou G, Guo Z, Shen X. Electron-Rich Oxycarbenes: New Synthetic and Catalytic Applications beyond Group 6 Fischer Carbene Complexes. Angew Chem Int Ed Engl 2023; 62:e202217189. [PMID: 36594672 DOI: 10.1002/anie.202217189] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 01/02/2023] [Accepted: 01/03/2023] [Indexed: 01/04/2023]
Abstract
Oxycarbenes have emerged as useful intermediates in synthetic chemistry. Compared to the widely studied oxycarbene metal complexes bearing Group 6 metals, the synthetic and catalytic applications of oxycarbenes beyond Group 6 Fischer carbene complexes are less explored because of the difficulty in controlling their reactivity and the need to use a stoichiometric amount of a presynthesized Group 6 metal carbene complex as the starting material. This Minireview summarizes early synthetic and catalytic applications of late-transition-metal oxycarbene complexes and highlights recent advances in free oxycarbene reactions and transition-metal-catalyzed reactions involving oxycarbenes. We hope this Minireview will inspire further developments in this emerging area.
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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
| | - 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
| | - 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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5
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Hang W, Li D, Zou S, Xi C. Visible-Light-Driven Reductive Carboxylation of Benzyl Bromides with Carbon Dioxide Using Formate as Terminal Reductant. J Org Chem 2022; 88:5007-5014. [PMID: 36126282 DOI: 10.1021/acs.joc.2c01840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cheap and available formate can be seen formally as a carbon dioxide radical anion (CO2•-) combined with a hydrogen atom, where the CO2•- is not only a highly active radical but also a very powerful reductant. In this paper, we successfully realized a visible-light-driven carboxylation of benzyl bromides with carbon dioxide to prepare high-value arylacetic acids using potassium formate as a terminal reductant. This reaction is characterized by mild reaction conditions and a wide range of substrates. Moreover, under nitrogen atmosphere, the reaction can also achieve the carboxylation of benzyl bromides utilizing an excess of potassium formate. Mechanistic experiments indicate this carboxylation proceeded through CO2•-, which was generated from the oxidation of 1,4-diazabicyclo[2.2.2]octane with excited photosensitizer Ir(ppy)2(dtbbpy)PF6 in the presence of the potassium formate.
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Affiliation(s)
- Wei Hang
- MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Danyun Li
- Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
| | - Song Zou
- MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Chanjuan Xi
- MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China.,State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
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6
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Nandi S, Jana R. Toward Sustainable Photo‐/Electrocatalytic Carboxylation of Organic Substrates with CO2. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Shantanu Nandi
- Indian Institute of Chemical Biology CSIR Organic and Medicinal Chemistry Division 4 Raja S C Mullick RoadJadavpur 700032 Kolkata INDIA
| | - Ranjan Jana
- Indian Institute of Chemical Biology CSIR Chemistry Division 4, Raja S. C. Mullick RoadJadavpur 700032 Kolkata INDIA
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7
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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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8
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Yi Y, Xi C. Photo-catalyzed sequential dearomatization/carboxylation of benzyl o-halogenated aryl ether with CO2 leading to spirocyclic carboxylic acids. CHINESE JOURNAL OF CATALYSIS 2022. [DOI: 10.1016/s1872-2067(21)63956-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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9
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Fan Z, Yi Y, Xi C. Recent Advances in Light‐Induced Carboxylation of Organic (Pseudo)Halides with CO2. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - Yaping Yi
- Tsinghua University Chemistry 100084 Beijing CHINA
| | - Chanjuan Xi
- Tsinghua University Department of Chemistry zhongguancui 100084 Beijing CHINA
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10
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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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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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Ueda Y, Masuda Y, Iwai T, Imaeda K, Takeuchi H, Ueno K, Gao M, Hasegawa JY, Sawamura M. Photoinduced Copper-Catalyzed Asymmetric Acylation of Allylic Phosphates with Acylsilanes. J Am Chem Soc 2022; 144:2218-2224. [PMID: 34990146 DOI: 10.1021/jacs.1c11526] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
We report a visible-light-induced copper-catalyzed highly enantioselective umpolung allylic acylation reaction with acylsilanes as acyl anion equivalents. Triplet-quenching experiments and DFT calculations supported our reaction design, which is based on copper-to-acyl metal-to-ligand charge transfer (MLCT) photoexcitation that generates a charge-separated triplet state as a highly reactive intermediate. According to the calculations, the allylic phosphate substrate in the excited state undergoes novel molecular activation into an allylic radical weakly bound to the copper complex. The allyl radical fragment undergoes copper-mediated regio- and stereocontrolled coupling with the acyl group under the influence of the chiral N-heterocyclic carbene ligand.
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Affiliation(s)
- Yusuke Ueda
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, Hokkaido 060-0810, Japan
| | - Yusuke Masuda
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido 001-0021, Japan.,Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, Hokkaido 060-0810, Japan
| | - Tomohiro Iwai
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, Hokkaido 060-0810, Japan
| | - Keisuke Imaeda
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, Hokkaido 060-0810, Japan
| | - Hiroki Takeuchi
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, Hokkaido 060-0810, Japan
| | - Kosei Ueno
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, Hokkaido 060-0810, Japan
| | - Min Gao
- Institute for Catalysis, Hokkaido University, Sapporo, Hokkaido 001-0021, Japan
| | - Jun-Ya Hasegawa
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido 001-0021, Japan.,Institute for Catalysis, Hokkaido University, Sapporo, Hokkaido 001-0021, Japan
| | - Masaya Sawamura
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido 001-0021, Japan.,Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, Hokkaido 060-0810, Japan
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13
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Ishida K, Kusama H. Generation of (amino)(boryloxy)carbenes from carbamoylboranes and their coupling reaction with aldehydes. Chem Commun (Camb) 2022; 58:1625-1628. [PMID: 35022628 DOI: 10.1039/d1cc06377d] [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
Carbamoylboranes were found to react with various aldehydes under heating conditions to give α-hydroxycarboxamides in good yields. A DFT study supports the mechanism, which involves thermally generated (amino)(boryloxy)carbene intermediates. To our knowledge, this is the first report on the generation of (amino)(boryloxy)carbene intermediates from carbamoylboranes and its application to carbon-carbon bond-forming reactions.
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Affiliation(s)
- Kento Ishida
- Department of Chemistry, Faculty of Science, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan.
| | - Hiroyuki Kusama
- Department of Chemistry, Faculty of Science, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan.
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14
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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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15
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Mao B, Wei JS, Shi M. Recent advancements in visible-light-driven carboxylation with carbon dioxide. Chem Commun (Camb) 2022; 58:9312-9327. [DOI: 10.1039/d2cc03380a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Carbon dioxide as a classic C1 source has long been investigated in organic synthetic chemistry. Diverse catalytic methods for CO2 activation were reported in the past several decades. In this...
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16
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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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17
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Takeuchi T, Aoyama T, Orihara K, Ishida K, Kusama H. Visible-Light-Induced In Situ Generation of Fischer-Type Copper Carbene Complexes from Acylsilanes and Its Application to Catalytic [4 + 1] Cycloaddition with Siloxydienes. Org Lett 2021; 23:9490-9494. [PMID: 34846907 DOI: 10.1021/acs.orglett.1c03683] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel methodology for in situ generation of Fischer-type metal-carbene complexes was developed. Photoirradiation to a mixture of an acylsilane and a cationic copper complex cleanly gave a Fischer-type copper-siloxycarbene complex, which was detected by spectroscopic methods. This carbene complex reacted with siloxydienes in a [4 + 1] cycloaddition manner to give cyclopentene derivatives. It is noteworthy that this reaction proceeds with a catalytic amount of copper through in situ generation of a Fischer-type copper-siloxycarbene complex intermediate.
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Affiliation(s)
- Taiichi Takeuchi
- Department of Chemistry, Faculty of Science, Gakushuin University, Tokyo 171-8588, Japan
| | - Tsukasa Aoyama
- Department of Chemistry, Faculty of Science, Gakushuin University, Tokyo 171-8588, Japan
| | - Kurumi Orihara
- Department of Chemistry, Faculty of Science, Gakushuin University, Tokyo 171-8588, Japan
| | - Kento Ishida
- Department of Chemistry, Faculty of Science, Gakushuin University, Tokyo 171-8588, Japan
| | - Hiroyuki Kusama
- Department of Chemistry, Faculty of Science, Gakushuin University, Tokyo 171-8588, Japan
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18
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Cai BG, Li Q, Li L, Xuan J. Carbon-oxygen bond formation via visible-light-induced O–H insertion between acylsilanes and oximes. GREEN SYNTHESIS AND CATALYSIS 2021. [DOI: 10.1016/j.gresc.2021.12.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
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19
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Takaishi K, Kosugi H, Nishimura R, Yamada Y, Ema T. C-Methylenation of anilines and indoles with CO 2 and hydrosilane using a pentanuclear zinc complex catalyst. Chem Commun (Camb) 2021; 57:8083-8086. [PMID: 34302161 DOI: 10.1039/d1cc03675k] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The one-step C-methylenation of anilines and indoles with CO2 and phenylsilane was catalyzed by a pentanuclear ZnII complex to give diarylmethanes via geminal C-H and C-C bond formation. It is proposed that the zinc-hydride complex generated in situ is a catalytically active species and that bis(silyl)acetal is a key intermediate. When aniline was used as a substrate, both the C-methylenation and N-methylation proceeded.
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Affiliation(s)
- Kazuto Takaishi
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, Tsushima, Okayama 700-8530, Japan.
| | - Hiroyasu Kosugi
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, Tsushima, Okayama 700-8530, Japan.
| | - Ritsuki Nishimura
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, Tsushima, Okayama 700-8530, Japan.
| | - Yuya Yamada
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, Tsushima, Okayama 700-8530, Japan.
| | - Tadashi Ema
- Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University, Tsushima, Okayama 700-8530, Japan.
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