1
|
Zhang FP, Wang RH, Li JF, Chen H, Hari Babu M, Ye M. Intermolecular Carbophosphination of Alkynes with Phosphole Oxides via Ni-Al Bimetal-Catalyzed C-P Bond Activation. Angew Chem Int Ed Engl 2023; 62:e202314701. [PMID: 37846814 DOI: 10.1002/anie.202314701] [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: 09/30/2023] [Revised: 10/15/2023] [Accepted: 10/17/2023] [Indexed: 10/18/2023]
Abstract
Intermolecular carbophosphination reaction of alkynes or alkenes with unreactive C-P bonds remains an elusive challenge. Herein, we used a Ni-Al bimetallic catalyst to realize an intermolecular carbophosphination reaction of alkynes with 5-membered phosphole oxides, providing a series of 7-membered phosphepines in up to 94 % yield.
Collapse
Affiliation(s)
- Feng-Ping Zhang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Haihe Laboratory of Sustainable Chemical Transformations, Frontiers Science Center for New Organic Matter, Nankai University, Tianjin, 300071, China
| | - Rong-Hua Wang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Haihe Laboratory of Sustainable Chemical Transformations, Frontiers Science Center for New Organic Matter, Nankai University, Tianjin, 300071, China
| | - Jiang-Fei Li
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Haihe Laboratory of Sustainable Chemical Transformations, Frontiers Science Center for New Organic Matter, Nankai University, Tianjin, 300071, China
| | - Hao Chen
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Haihe Laboratory of Sustainable Chemical Transformations, Frontiers Science Center for New Organic Matter, Nankai University, Tianjin, 300071, China
| | - Madala Hari Babu
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Haihe Laboratory of Sustainable Chemical Transformations, Frontiers Science Center for New Organic Matter, Nankai University, Tianjin, 300071, China
| | - Mengchun Ye
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Haihe Laboratory of Sustainable Chemical Transformations, Frontiers Science Center for New Organic Matter, Nankai University, Tianjin, 300071, China
| |
Collapse
|
2
|
Chen M, Ventura AM, Das S, Ibrahim AF, Zimmerman PM, Montgomery J. Oxidative Cross Dehydrogenative Coupling of N-Heterocycles with Aldehydes through C( sp3)-H Functionalization. J Am Chem Soc 2023; 145:20176-20181. [PMID: 37672664 PMCID: PMC10915535 DOI: 10.1021/jacs.3c06532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/08/2023]
Abstract
Existing methodologies for metal-catalyzed cross-couplings typically rely on preinstallation of reactive functional groups on both reaction partners. In contrast, C-H functionalization approaches offer promise in simplification of the requisite substrates; however, challenges from low reactivity and similar reactivity of various C-H bonds introduce considerable complexity. Herein, the oxidative cross dehydrogenative coupling of α-amino C(sp3)-H bonds and aldehydes to produce ketone derivatives is described using an unusual reaction medium that incorporates the simultaneous use of di-tert-butyl peroxide as an oxidant and zinc metal as a reductant. The method proceeds with a broad substrate scope, representing an attractive approach for accessing α-amino ketones through the formal acylation of C-H bonds α to nitrogen in N-heterocycles. A combination of experimental investigation and computational modeling provides evidence for a mechanistic pathway involving cross-selective nickel-mediated cross-coupling of α-amino radicals and acyl radicals.
Collapse
Affiliation(s)
- Mo Chen
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
| | - Austin M Ventura
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
| | - Soumik Das
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
| | - Ammar F Ibrahim
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
| | - Paul M Zimmerman
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
| | - John Montgomery
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
| |
Collapse
|
3
|
Davies AM, D Hernandez R, Tunge JA. Direct Aroylation of Olefins through a Cobalt/Photoredox-Catalyzed Decarboxylative and Dehydrogenative Coupling with α-Oxo Acids. Chemistry 2022; 28:e202202781. [PMID: 36322775 DOI: 10.1002/chem.202202781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Indexed: 11/05/2022]
Abstract
A photoredox/cobalt dual catalytic procedure has been developed that allows benzoylation of olefins. Here the photoredox catalyst effects the decarboxylation of α-ketoacids to form benzoyl radicals. After addition of this radical to styrenes, the cobalt catalyst abstracts a H-atom. Hydrogen evolution from the putative cobalt hydride intermediate allows a Heck-like aroylation without the need for a stoichiometric oxidant. Mechanistic studies reveal that electronically different styrenes lead to a curved Hammett plot, thus suggesting a change in product-determining step in the catalytic mechanism.
Collapse
Affiliation(s)
- Alex M Davies
- Department of Chemistry, University of Kansas, 1567 Irving Hill Rd., Lawrence, KS 66045, USA
| | - Rafael D Hernandez
- Department of Chemistry, University of Kansas, 1567 Irving Hill Rd., Lawrence, KS 66045, USA
| | - Jon A Tunge
- Department of Chemistry, University of Kansas, 1567 Irving Hill Rd., Lawrence, KS 66045, USA
| |
Collapse
|
4
|
Zhang H, Liang S, Wei D, Xu K, Zeng C. Electrocatalytic Generation of Acyl Radicals and Their Applications. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Haonan Zhang
- Faculty of Environmental and Life Beijing University of Technology 100 Pingleyuan Rd. 100124 Beijing China
| | - Sen Liang
- Beijing Key Laboratory of Flavor Chemistry Beijing Technology and Business University 100048 Beijing China
| | - Dengchao Wei
- Faculty of Environmental and Life Beijing University of Technology 100 Pingleyuan Rd. 100124 Beijing China
| | - Kun Xu
- Faculty of Environmental and Life Beijing University of Technology 100 Pingleyuan Rd. 100124 Beijing China
| | - Chengchu Zeng
- Faculty of Environmental and Life Beijing University of Technology 100 Pingleyuan Rd. 100124 Beijing China
| |
Collapse
|
5
|
Fan X, Sun X, Ji M, Tong H, Zhang W, Sun Z, Chu W. Visible-Light-Induced Acylative Coupling of Benzoic Acid Derivatives with Alkenes to Dihydrochalcones. Org Lett 2022; 24:7271-7275. [PMID: 36190778 DOI: 10.1021/acs.orglett.2c02538] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A strategy was developed for the visible-light-induced photocatalytic synthesis of dihydrochalcone via the deoxygenation and coupling of benzoic acid derivatives with alkenes using diphenyl sulfide as the O-transfer reagent. Under mild photoredox conditions, a series of dihydrochalcone derivatives were produced in moderate to good yields. A mechanism for the visible-light-induced free-radical coupling was proposed on the basis of the control experiments. The protocol provides a new strategy the generation of acyl radicals from carboxylic acids and the synthesis of dihydrochalcones.
Collapse
Affiliation(s)
- Xiaodong Fan
- †School of Chemistry and Materials Science, Heilongjiang University, Harbin, Heilongjiang 150080, P. R. China
| | - Xinhui Sun
- †School of Chemistry and Materials Science, Heilongjiang University, Harbin, Heilongjiang 150080, P. R. China
| | - Mengmeng Ji
- †School of Chemistry and Materials Science, Heilongjiang University, Harbin, Heilongjiang 150080, P. R. China
| | - Huixin Tong
- †School of Chemistry and Materials Science, Heilongjiang University, Harbin, Heilongjiang 150080, P. R. China
| | - Weiya Zhang
- †School of Chemistry and Materials Science, Heilongjiang University, Harbin, Heilongjiang 150080, P. R. China
| | - Zhizhong Sun
- †School of Chemistry and Materials Science, Heilongjiang University, Harbin, Heilongjiang 150080, P. R. China
| | - Wenyi Chu
- †School of Chemistry and Materials Science, Heilongjiang University, Harbin, Heilongjiang 150080, P. R. China
| |
Collapse
|
6
|
Wang Z, Zeng L, He C, Duan C. Metal-Organic Framework-Encapsulated Anthraquinone for Efficient Photocatalytic Hydrogen Atom Transfer. ACS APPLIED MATERIALS & INTERFACES 2022; 14:7980-7989. [PMID: 35119261 DOI: 10.1021/acsami.1c22872] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Anthraquinone (AQ) as an effective hydrogen atom transfer catalyst was limited in photocatalysis application due to the dimerization of reduced AQ. Sr-NDI@AQ, encapsulating AQ into the channel of Sr-NDI, paved a new way for solving the problem of dimerization of reduced AQ and improving the catalytic efficiency owing to the fast electron transfer from reduced AQ to the ligand through host-guest interaction. The structure of Sr-NDI@AQ was determined by single-crystal X-ray diffraction, and the value for distance and torsion angle between the ligand and AQ was calculated. The photochemical and electrochemical properties for Sr-NDI@AQ were characterized through a series of experiments. The coupling reaction between aldehyde and phenyl vinyl sulfone and photoacetalization reaction were carried out, displaying the improving catalytic efficiency of Sr-NDI@AQ compared to Sr-NDI and AQ. The reaction mechanisms were proposed through radical capture and electron paramagnetic resonance experiments.
Collapse
Affiliation(s)
- Zhonghe Wang
- State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian 116024, China
| | - Le Zeng
- State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian 116024, China
| | - Cheng He
- State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian 116024, China
| | - Chunying Duan
- State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian 116024, China
| |
Collapse
|
7
|
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.
Collapse
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.
| |
Collapse
|
8
|
Liu YL, Ouyang YJ, Zheng H, Liu H, Wei WT. Recent advances in acyl radical enabled reactions between aldehydes and alkenes. Chem Commun (Camb) 2021; 57:6111-6120. [PMID: 34113948 DOI: 10.1039/d1cc02112e] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Radical-mediated functionalization of alkenes has been emerging as an elegant and straightforward protocol to increase molecule complexity. Moreover, the abstraction of a hydrogen atom from aldehydes to afford acyl radicals has evolved as a rising star due to its high atom-economy and the ready availability of aldehydes. Considering the great influence and synthetic potential of acyl radical enabled reactions between aldehydes and alkenes, we provide a summary of the state of the art in this field with a specific emphasis on the working models and corresponding mechanisms. The discussion is divided according to the kind of alkenes and reaction type.
Collapse
Affiliation(s)
- Yi-Lin Liu
- College of Chemistry and Materials Engineering, Hunan Engineering Laboratory for Preparation Technology of Polyvinyl Alcohol (PVA) Fiber Material, Huaihua University, Huaihua, Hunan 418008, China.
| | - Yue-Jun Ouyang
- College of Chemistry and Materials Engineering, Hunan Engineering Laboratory for Preparation Technology of Polyvinyl Alcohol (PVA) Fiber Material, Huaihua University, Huaihua, Hunan 418008, China.
| | - Hongxing Zheng
- Institution of Functional Organic Molecules and Materials, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252059, China and College of Chemistry and Materials Engineering, Institute of New Materials & Industrial Technology, Wenzhou University, Wenzhou, 325035, China
| | - Hongxin Liu
- College of Chemistry and Materials Engineering, Institute of New Materials & Industrial Technology, Wenzhou University, Wenzhou, 325035, China
| | - Wen-Ting Wei
- College of Chemistry and Materials Engineering, Hunan Engineering Laboratory for Preparation Technology of Polyvinyl Alcohol (PVA) Fiber Material, Huaihua University, Huaihua, Hunan 418008, China. and School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China
| |
Collapse
|
9
|
Holownia A, Apte CN, Yudin AK. Acyl metalloids: conformity and deviation from carbonyl reactivity. Chem Sci 2021; 12:5346-5360. [PMID: 34163766 PMCID: PMC8179550 DOI: 10.1039/d1sc00077b] [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: 01/06/2021] [Accepted: 03/09/2021] [Indexed: 01/13/2023] Open
Abstract
Once considered as mere curiosities, acyl metalloids are now recognized for their utility in enabling chemical synthesis. This perspective considers the reactivity displayed by acylboron, -silicon, -germanium, and tellurium species. By highlighting the role of these species in various transformations, we demonstrate how differences between the comprising elements result in varied reaction outcomes. While acylboron compounds are primarily used in polar transformations, germanium and tellurium species have found utility as radical precursors. Applications of acylsilanes are comparatively more diverse, owing to the possibility to access both radical and polar chemistry.
Collapse
Affiliation(s)
- Aleksandra Holownia
- Davenport Laboratories, Department of Chemistry, University of Toronto 80 St. George St. Toronto Ontario M5S 3H6 Canada
| | - Chirag N Apte
- Davenport Laboratories, Department of Chemistry, University of Toronto 80 St. George St. Toronto Ontario M5S 3H6 Canada
| | - Andrei K Yudin
- Davenport Laboratories, Department of Chemistry, University of Toronto 80 St. George St. Toronto Ontario M5S 3H6 Canada
| |
Collapse
|
10
|
Fan JH, Hu YJ, Li LX, Wang JJ, Li SP, Zhao J, Li CC. Recent advances in total syntheses of natural products containing the benzocycloheptane motif. Nat Prod Rep 2021; 38:1821-1851. [PMID: 33650613 DOI: 10.1039/d1np00003a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Covering: 2010 to 2020Benzocycloheptane is a fundamental and unique structural motif found in pharmaceuticals and natural products. The total syntheses of natural products bearing the benzocycloheptane subunit are challenging and there are only a few efficient approaches to access benzocycloheptane. Thus, new methods and innovative strategies for preparing such natural products need to be developed. In this review, recent progress in the total syntheses of natural products bearing the benzocycloheptane motif is presented, and key transformations for the construction of benzocycloheptane are highlighted. This review provides a useful guide for those engaged in the syntheses of natural products containing the benzocycloheptane motif.
Collapse
Affiliation(s)
- Jian-Hong Fan
- Institute of Chinese Medical Sciences, University of Macau, Macau, China. and Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China.
| | - Ya-Jian Hu
- Institute of Chinese Medical Sciences, University of Macau, Macau, China. and Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China.
| | - Li-Xuan Li
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China.
| | - Jing-Jing Wang
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China.
| | - Shao-Ping Li
- Institute of Chinese Medical Sciences, University of Macau, Macau, China.
| | - Jing Zhao
- Institute of Chinese Medical Sciences, University of Macau, Macau, China.
| | - Chuang-Chuang Li
- Shenzhen Grubbs Institute and Department of Chemistry, Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China.
| |
Collapse
|
11
|
Różycka D, Korycka-Machała M, Żaczek A, Dziadek J, Gurda D, Orlicka-Płocka M, Wyszko E, Biniek-Antosiak K, Rypniewski W, Olejniczak AB. Novel Isoniazid-Carborane Hybrids Active in Vitro Against Mycobacterium tuberculosis. Pharmaceuticals (Basel) 2020; 13:ph13120465. [PMID: 33333865 PMCID: PMC7765321 DOI: 10.3390/ph13120465] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 11/27/2020] [Accepted: 12/11/2020] [Indexed: 12/11/2022] Open
Abstract
Tuberculosis (TB) is a severe infectious disease with high mortality and morbidity. The emergence of drug-resistant TB has increased the challenge to eliminate this disease. Isoniazid (INH) remains the key and effective component in the therapeutic regimen recommended by World Health Organization (WHO). A series of isoniazid-carborane derivatives containing 1,2-dicarba-closo-dodecaborane, 1,7-dicarba-closo-dodecaborane, 1,12-dicarba-closo-dodecaborane, or 7,8-dicarba-nido-undecaborate anion were synthesized for the first time. The compounds were tested in vitro against the Mycobacterium tuberculosis (Mtb) H37Rv strain and its mutant (DkatG) defective in the synthesis of catalase-peroxidase (KatG). N'-((7,8-dicarba-nido-undecaboranyl)methylidene)isonicotinohydrazide (16) showed the highest activity against the wild-type Mtb strain. All hybrids could inhibit the growth of the ΔkatG mutant in lower concentrations than INH. N'-([(1,12-dicarba-closo-dodecaboran-1yl)ethyl)isonicotinohydrazide (25) exhibited more than 60-fold increase in activity against Mtb DkatG as compared to INH. This compound was also found to be noncytotoxic up to a concentration four times higher than the minimum inhibitory concentration 99% (MIC99) value.
Collapse
Affiliation(s)
- Daria Różycka
- Institute of Medical Biology, Polish Academy of Sciences, 106 Lodowa St., 93-232 Lodz, Poland; (D.R.); (M.K.-M.); (J.D.)
| | - Małgorzata Korycka-Machała
- Institute of Medical Biology, Polish Academy of Sciences, 106 Lodowa St., 93-232 Lodz, Poland; (D.R.); (M.K.-M.); (J.D.)
| | - Anna Żaczek
- Institute of Medical Sciences, Medical College, University of Rzeszow, 2A Kopisto Avenue, 35-959 Rzeszow, Poland;
| | - Jarosław Dziadek
- Institute of Medical Biology, Polish Academy of Sciences, 106 Lodowa St., 93-232 Lodz, Poland; (D.R.); (M.K.-M.); (J.D.)
| | - Dorota Gurda
- Institute of Bioorganic Chemistry, Polish Academy of Sciences, 12/14Z. Noskowskiego St., 61-704 Poznan, Poland; (D.G.); (M.O.-P.); (E.W.); (K.B.-A.); (W.R.)
| | - Marta Orlicka-Płocka
- Institute of Bioorganic Chemistry, Polish Academy of Sciences, 12/14Z. Noskowskiego St., 61-704 Poznan, Poland; (D.G.); (M.O.-P.); (E.W.); (K.B.-A.); (W.R.)
| | - Eliza Wyszko
- Institute of Bioorganic Chemistry, Polish Academy of Sciences, 12/14Z. Noskowskiego St., 61-704 Poznan, Poland; (D.G.); (M.O.-P.); (E.W.); (K.B.-A.); (W.R.)
| | - Katarzyna Biniek-Antosiak
- Institute of Bioorganic Chemistry, Polish Academy of Sciences, 12/14Z. Noskowskiego St., 61-704 Poznan, Poland; (D.G.); (M.O.-P.); (E.W.); (K.B.-A.); (W.R.)
| | - Wojciech Rypniewski
- Institute of Bioorganic Chemistry, Polish Academy of Sciences, 12/14Z. Noskowskiego St., 61-704 Poznan, Poland; (D.G.); (M.O.-P.); (E.W.); (K.B.-A.); (W.R.)
| | - Agnieszka B. Olejniczak
- Institute of Medical Biology, Polish Academy of Sciences, 106 Lodowa St., 93-232 Lodz, Poland; (D.R.); (M.K.-M.); (J.D.)
- Correspondence: ; Tel.: +48-42-272-36-37
| |
Collapse
|
12
|
de Pedro Beato E, Mazzarella D, Balletti M, Melchiorre P. Photochemical generation of acyl and carbamoyl radicals using a nucleophilic organic catalyst: applications and mechanism thereof. Chem Sci 2020; 11:6312-6324. [PMID: 32953026 PMCID: PMC7472930 DOI: 10.1039/d0sc02313b] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 06/03/2020] [Indexed: 11/22/2022] Open
Abstract
An organic catalyst uses low-energy photons to generate acyl and carbamoyl radicals upon activation of the corresponding chlorides via a nucleophilic acyl substitution path. The synthetic potential and the mechanism of this strategy are discussed.
We detail a strategy that uses a commercially available nucleophilic organic catalyst to generate acyl and carbamoyl radicals upon activation of the corresponding chlorides and anhydrides via a nucleophilic acyl substitution path. The resulting nucleophilic radicals are then intercepted by a variety of electron-poor olefins in a Giese-type addition process. The chemistry requires low-energy photons (blue LEDs) to activate acyl and carbamoyl radical precursors, which, due to their high reduction potential, are not readily prone to redox-based activation mechanisms. To elucidate the key mechanistic aspects of this catalytic photochemical radical generation strategy, we used a combination of transient absorption spectroscopy investigations, electrochemical studies, quantum yield measurements, and the characterization of key intermediates. We identified a variety of off-the-cycle intermediates that engage in a light-regulated equilibrium with reactive radicals. These regulated equilibriums cooperate to control the overall concentrations of the radicals, contributing to the efficiency of the overall catalytic process and facilitating the turnover of the catalyst.
Collapse
Affiliation(s)
- Eduardo de Pedro Beato
- ICIQ - Institute of Chemical Research of Catalonia , The Barcelona Institute of Science and Technology , Avenida Països Catalans 16 , 43007 , Tarragona , Spain . ; http://www.iciq.org/research/research_group/prof-paolo-melchiorre/
| | - Daniele Mazzarella
- ICIQ - Institute of Chemical Research of Catalonia , The Barcelona Institute of Science and Technology , Avenida Països Catalans 16 , 43007 , Tarragona , Spain . ; http://www.iciq.org/research/research_group/prof-paolo-melchiorre/
| | - Matteo Balletti
- ICIQ - Institute of Chemical Research of Catalonia , The Barcelona Institute of Science and Technology , Avenida Països Catalans 16 , 43007 , Tarragona , Spain . ; http://www.iciq.org/research/research_group/prof-paolo-melchiorre/
| | - Paolo Melchiorre
- ICIQ - Institute of Chemical Research of Catalonia , The Barcelona Institute of Science and Technology , Avenida Països Catalans 16 , 43007 , Tarragona , Spain . ; http://www.iciq.org/research/research_group/prof-paolo-melchiorre/.,ICREA , Passeig Lluís Companys 23 , 08010 , Barcelona , Spain
| |
Collapse
|
13
|
Zhang Y, Liu H, Tang L, Tang HJ, Wang L, Zhu C, Feng C. Intermolecular Carboamination of Unactivated Alkenes. J Am Chem Soc 2018; 140:10695-10699. [DOI: 10.1021/jacs.8b07023] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Yu Zhang
- Institute of Advanced Synthesis, College of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, Jiangsu 210009, People’s Republic of China
| | - Haidong Liu
- Institute of Advanced Synthesis, College of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, Jiangsu 210009, People’s Republic of China
| | - Luning Tang
- Institute of Advanced Synthesis, College of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, Jiangsu 210009, People’s Republic of China
| | - Hai-Jun Tang
- Institute of Advanced Synthesis, College of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, Jiangsu 210009, People’s Republic of China
| | - Lu Wang
- Institute of Advanced Synthesis, College of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, Jiangsu 210009, People’s Republic of China
| | - Chuan Zhu
- Institute of Advanced Synthesis, College of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, Jiangsu 210009, People’s Republic of China
| | - Chao Feng
- Institute of Advanced Synthesis, College of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, Jiangsu 210009, People’s Republic of China
| |
Collapse
|
14
|
Norman AR, Yousif MN, McErlean CSP. Photoredox-catalyzed indirect acyl radical generation from thioesters. Org Chem Front 2018. [DOI: 10.1039/c8qo00867a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A photoredox-catalyzed method for the indirect generation of acyl radicals from stable thioesters is described.
Collapse
|
15
|
Chen Y, Zhang W, Ren L, Li J, Li A. Total Syntheses of Daphenylline, Daphnipaxianine A, and Himalenine D. Angew Chem Int Ed Engl 2017; 57:952-956. [DOI: 10.1002/anie.201711482] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Yu Chen
- State Key Laboratory of Bioorganic and Natural Products Chemistry; Collaborative Innovation Center of Chemistry for Life Sciences; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Wenhao Zhang
- State Key Laboratory of Bioorganic and Natural Products Chemistry; Collaborative Innovation Center of Chemistry for Life Sciences; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Lu Ren
- State Key Laboratory of Bioorganic and Natural Products Chemistry; Collaborative Innovation Center of Chemistry for Life Sciences; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Jian Li
- State Key Laboratory of Bioorganic and Natural Products Chemistry; Collaborative Innovation Center of Chemistry for Life Sciences; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Ang Li
- State Key Laboratory of Bioorganic and Natural Products Chemistry; Collaborative Innovation Center of Chemistry for Life Sciences; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| |
Collapse
|
16
|
Chen Y, Zhang W, Ren L, Li J, Li A. Total Syntheses of Daphenylline, Daphnipaxianine A, and Himalenine D. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201711482] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yu Chen
- State Key Laboratory of Bioorganic and Natural Products Chemistry; Collaborative Innovation Center of Chemistry for Life Sciences; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Wenhao Zhang
- State Key Laboratory of Bioorganic and Natural Products Chemistry; Collaborative Innovation Center of Chemistry for Life Sciences; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Lu Ren
- State Key Laboratory of Bioorganic and Natural Products Chemistry; Collaborative Innovation Center of Chemistry for Life Sciences; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Jian Li
- State Key Laboratory of Bioorganic and Natural Products Chemistry; Collaborative Innovation Center of Chemistry for Life Sciences; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Ang Li
- State Key Laboratory of Bioorganic and Natural Products Chemistry; Collaborative Innovation Center of Chemistry for Life Sciences; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| |
Collapse
|
17
|
Jiang J, Ramozzi R, Moteki S, Usui A, Maruoka K, Morokuma K. Mechanism of Metal-Free C–H Activation of Branched Aldehydes and Acylation of Alkenes Using Hypervalent Iodine Compound: A Theoretical Study. J Org Chem 2015; 80:9264-71. [DOI: 10.1021/acs.joc.5b01695] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Julong Jiang
- Fukui
Institute for Fundamental Chemistry, Kyoto University, Takano-Nishihiraki-cho
34-4, Kyoto 606-8103, Japan
| | - Romain Ramozzi
- Fukui
Institute for Fundamental Chemistry, Kyoto University, Takano-Nishihiraki-cho
34-4, Kyoto 606-8103, Japan
| | - Shin Moteki
- Department
of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - Asuka Usui
- Department
of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - Keiji Maruoka
- Department
of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - Keiji Morokuma
- Fukui
Institute for Fundamental Chemistry, Kyoto University, Takano-Nishihiraki-cho
34-4, Kyoto 606-8103, Japan
| |
Collapse
|
18
|
Kremer A, Aurisicchio C, De Leo F, Ventura B, Wouters J, Armaroli N, Barbieri A, Bonifazi D. Walking Down the Chalcogenic Group of the Periodic Table: From Singlet to Triplet Organic Emitters. Chemistry 2015; 21:15377-87. [PMID: 26471446 DOI: 10.1002/chem.201501260] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Revised: 07/16/2015] [Indexed: 01/22/2023]
Affiliation(s)
- Adrian Kremer
- Namur Research College (NARC) and Department of Chemistry, University of Namur (UNamur), Rue de Bruxelles 61, 5000 Namur (Belgium)
| | - Claudia Aurisicchio
- Namur Research College (NARC) and Department of Chemistry, University of Namur (UNamur), Rue de Bruxelles 61, 5000 Namur (Belgium)
| | - Federica De Leo
- Namur Research College (NARC) and Department of Chemistry, University of Namur (UNamur), Rue de Bruxelles 61, 5000 Namur (Belgium)
| | - Barbara Ventura
- Istituto per la Sintesi Organica e la Fotoreattività (ISOF), Consiglio Nazionale delle Ricerche (CNR), Via Gobetti 101, 40129 Bologna (Italy)
| | - Johan Wouters
- Namur Research College (NARC) and Department of Chemistry, University of Namur (UNamur), Rue de Bruxelles 61, 5000 Namur (Belgium)
| | - Nicola Armaroli
- Istituto per la Sintesi Organica e la Fotoreattività (ISOF), Consiglio Nazionale delle Ricerche (CNR), Via Gobetti 101, 40129 Bologna (Italy)
| | - Andrea Barbieri
- Istituto per la Sintesi Organica e la Fotoreattività (ISOF), Consiglio Nazionale delle Ricerche (CNR), Via Gobetti 101, 40129 Bologna (Italy).
| | - Davide Bonifazi
- Namur Research College (NARC) and Department of Chemistry, University of Namur (UNamur), Rue de Bruxelles 61, 5000 Namur (Belgium).
- Department of Chemical and Pharmaceutical Sciences and INSTM UdR Trieste, University of Trieste, Piazzale Europa 1, 34127 Trieste (Italy).
| |
Collapse
|
19
|
Nagatomo M, Kamimura D, Matsui Y, Masuda K, Inoue M. Et 3B-mediated two- and three-component coupling reactions via radical decarbonylation of α-alkoxyacyl tellurides: single-step construction of densely oxygenated carboskeletons. Chem Sci 2015; 6:2765-2769. [PMID: 29403632 PMCID: PMC5763990 DOI: 10.1039/c5sc00457h] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Accepted: 03/05/2015] [Indexed: 11/21/2022] Open
Abstract
We devised new radical-based two- and three-component coupling reactions of sugar derivatives, and realized one-step construction of contiguously substituted polyol structures.
The single-step construction of various densely oxygenated carboskeletons was achieved by radical-based two- and three-component coupling reactions of sugar derivatives, without the need for light or heat. Et3B/O2-mediated decarbonylation readily converted α-alkoxyacyl tellurides to α-alkoxy carbon radicals, which intermolecularly added to glyoxylic oxime ether or enones to provide the two-component adducts. Furthermore, the three-component adducts were produced by an intermolecular aldol reaction between the aldehyde and the boron enolates generated by capture of the two-component radical intermediates by Et3B. This powerful coupling method serves as a novel strategy for the convergent synthesis of polyol natural products.
Collapse
Affiliation(s)
- Masanori Nagatomo
- Graduate School of Pharmaceutical Sciences , The University of Tokyo , Hongo, Bunkyo-ku , Tokyo 113-0033 , Japan .
| | - Daigo Kamimura
- Graduate School of Pharmaceutical Sciences , The University of Tokyo , Hongo, Bunkyo-ku , Tokyo 113-0033 , Japan .
| | - Yuki Matsui
- Graduate School of Pharmaceutical Sciences , The University of Tokyo , Hongo, Bunkyo-ku , Tokyo 113-0033 , Japan .
| | - Keisuke Masuda
- Graduate School of Pharmaceutical Sciences , The University of Tokyo , Hongo, Bunkyo-ku , Tokyo 113-0033 , Japan .
| | - Masayuki Inoue
- Graduate School of Pharmaceutical Sciences , The University of Tokyo , Hongo, Bunkyo-ku , Tokyo 113-0033 , Japan .
| |
Collapse
|
20
|
Nagatomo M, Nishiyama H, Fujino H, Inoue M. Decarbonylative Radical Coupling of α-Aminoacyl Tellurides: Single-Step Preparation of γ-Amino and α,β-Diamino Acids and Rapid Synthesis of Gabapentin and Manzacidin A. Angew Chem Int Ed Engl 2014; 54:1537-41. [DOI: 10.1002/anie.201410186] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Indexed: 11/09/2022]
|
21
|
Nagatomo M, Nishiyama H, Fujino H, Inoue M. Decarbonylative Radical Coupling of α-Aminoacyl Tellurides: Single-Step Preparation of γ-Amino and α,β-Diamino Acids and Rapid Synthesis of Gabapentin and Manzacidin A. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201410186] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
22
|
Moteki SA, Usui A, Selvakumar S, Zhang T, Maruoka K. Metal-free C-H bond activation of branched aldehydes with a hypervalent iodine(III) catalyst under visible-light photolysis: successful trapping with electron-deficient olefins. Angew Chem Int Ed Engl 2014; 53:11060-4. [PMID: 25155904 DOI: 10.1002/anie.201406513] [Citation(s) in RCA: 100] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Indexed: 11/08/2022]
Abstract
Direct acyl radical formation of linear aldehydes (RCH2-CHO) and subsequent hydroacylation with electron-deficient olefins can be effected with various types of metal and nonmetal catalysts/reagents. In marked contrast, however, no successful reports on the use of branched aldehydes have been made thus far because of their strong tendency of generating alkyl radicals through the facile decarbonylation of acyl radicals. Here, use of a hypervalent iodine(III) catalyst under visible light photolysis allows a mild way of generating acyl radicals from various branched aldehydes, thereby giving the corresponding hydroacylated products almost exclusively. Another characteristic feature of this approach is the catalytic use of hypervalent iodine(III) reagent, which is a rare example on the generation of radicals in hypervalent iodine chemistry.
Collapse
Affiliation(s)
- Shin A Moteki
- Laboratory of Synthetic Organic Chemistry and Special Laboratory of Organocatalytic Chemistry, Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502 (Japan)
| | | | | | | | | |
Collapse
|
23
|
Moteki SA, Usui A, Selvakumar S, Zhang T, Maruoka K. Metal-Free CH Bond Activation of Branched Aldehydes with a Hypervalent Iodine(III) Catalyst under Visible-Light Photolysis: Successful Trapping with Electron-Deficient Olefins. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201406513] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
24
|
|
25
|
Amos RIJ, Gourlay BS, Yates BF, Schiesser CH, Lewis TW, Smith JA. Mechanistic investigation of the oxidation of hydrazides: implications for the activation of the TB drug isoniazid. Org Biomol Chem 2013; 11:170-6. [DOI: 10.1039/c2ob26419f] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
26
|
Kambe N, Han LB, Fujiwara SI, Sonoda N. Free radical addition of α-telluroesters to alkenes. HETEROATOM CHEMISTRY 2011. [DOI: 10.1002/hc.20716] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
27
|
Riofski MV, John JP, Zheng MM, Kirshner J, Colby DA. Exploiting the facile release of trifluoroacetate for the α-methylenation of the sterically hindered carbonyl groups on (+)-sclareolide and (-)-eburnamonine. J Org Chem 2011; 76:3676-83. [PMID: 21491928 DOI: 10.1021/jo102114f] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An efficient method for the α-methylenation of carbonyl groups is reported, and this transformation is accomplished by a facile elimination of trifluoroacetate during the formation of the olefin. This method represents an improvement beyond existing protocol in cases of steric hindrance, and we have demonstrated the utility of the process across a series of ketones, lactams, and lactones. Additionally, we have applied this method to produce semisynthetic derivatives of the natural products (+)-sclareolide and (-)-eburnamonine, in which the carbonyl group is proximal to bulky functional groups. Mechanistic insight is also provided from a time course of (19)F NMR. Biological evaluation of the natural-product-derived enones led to the identification of a derivative of (-)-eburnamonine with significant cytotoxicity (LC(50) = 14.12 μM) in drug-resistant MDA-MB-231 breast cancer cells.
Collapse
Affiliation(s)
- Mark V Riofski
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, Indiana 47907, United States
| | | | | | | | | |
Collapse
|
28
|
Trost BM, Nguyen HM, Koradin C. Reprint of: Synthesis of a tricyclic core of rameswaralide. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.03.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
29
|
Kyne SH, Schiesser CH, Matsubara H. An ab initio and DFT study of radical addition reactions of imidoyl and thioyl radicals to methanimine. Org Biomol Chem 2011; 9:3217-24. [DOI: 10.1039/c1ob05105a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
30
|
Abstract
A tricyclic core containing a 5,7-fused bicyclic unit of rameswaralide was prepared starting from a 1,6-enyne. The synthetic sequence involved (i) ruthenium-catalyzed [5+2]-cycloaddition of 1,6-enyne, (ii) an acyl radical based approach to construct the lactone, and (iii) a regioselective installation of the conjugated double bond by a concomitant sulfenylation-dehydrosulfenylation sequence.
Collapse
Affiliation(s)
- Barry M. Trost
- Department of Chemistry, Stanford University, Stanford, CA 94305, USA
| | - Hien M. Nguyen
- Department of Chemistry, University of Iowa, Iowa City, IA 52242, USA
| | | |
Collapse
|
31
|
Paasche A, Schiller M, Schirmeister T, Engels B. Mechanistic study of the reaction of thiol-containing enzymes with alpha,beta-unsaturated carbonyl substrates by computation and chemoassays. ChemMedChem 2010; 5:869-80. [PMID: 20401893 PMCID: PMC7162195 DOI: 10.1002/cmdc.201000020] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We investigated the reactions between substituted α,β‐unsaturated carbonyl compounds (Michael systems) and thiols by computations as well as chemoassays. The results give insight into variations in the underlying mechanisms as a function of the substitution pattern. This is of interest for the mechanisms of inhibition of the SARS coronavirus main protease (SARS‐CoV Mpro) by etacrynic acid derivatives as well as for the excess toxicity of substituted α,β‐unsaturated carbonyl compounds. This study compares possible reaction courses including 1,4‐addition followed by a ketonization step, and underscores the importance of a base‐catalyzed step for the reactivity of thiol groups in enzymes. Phenyl and methyl substituents at the Michael system decrease the reactivity of the electrophilic compound, but chlorophenyl substituents partly recover the reactivity. Computations also indicate that electron‐pushing substituents lead to a change in the reaction mechanism. The conformation of the Michael system is also found to significantly influence reactivity: the s‐cis conformation leads to higher reactivity than the s‐trans conformation. The computed data explain the trends in measured inhibition potencies of substituted α,β‐unsaturated carbonyl compounds and of reaction rates in chemical assays. They also indicate that the reversibility of inhibition does not stand in contrast to the formation of a new covalent bond between inhibitor and protease.
Collapse
Affiliation(s)
- Alexander Paasche
- Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | | | | | | |
Collapse
|
32
|
Amos RI, Smith JA, Yates BF, Schiesser CH. Acyl radical addition to benzene and related systems—a computational study. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.07.041] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
33
|
Ravelli D, Zema M, Mella M, Fagnoni M, Albini A. Benzoyl radicals from (hetero)aromatic aldehydes. Decatungstate photocatalyzed synthesis of substituted aromatic ketones. Org Biomol Chem 2010; 8:4158-64. [PMID: 20661511 DOI: 10.1039/c0ob00066c] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Benzoyl radicals are generated directly from (hetero)aromatic aldehydes upon tetrabutylammonium decatungstate ((n-Bu(4)N)(4)W(10)O(32)), TBADT) photocatalysis under mild conditions. In the presence of alpha,beta-unsaturated esters, ketones and nitriles radical conjugate addition ensues and gives the corresponding beta-functionalized aryl alkyl ketones in moderate to good yields (stereoselectively in the case of 3-methylene-2-norbornanone). Due to the mild reaction conditions the presence of various functional groups on the aromatic ring is tolerated (e.g. methyl, methoxy, chloro). The method can be applied to hetero-aromatic aldehydes whether electron-rich (e.g. thiophene-2-carbaldehyde) or electron-poor (e.g. pyridine-3-carbaldehyde).
Collapse
Affiliation(s)
- Davide Ravelli
- Department of Organic Chemistry, University of Pavia, Viale Taramelli 10, 27100 Pavia, Italy
| | | | | | | | | |
Collapse
|
34
|
Tran TA, Schiesser CH. Reactions of Acetyl Radical with Acetylene - A Computational Study. B KOREAN CHEM SOC 2010. [DOI: 10.5012/bkcs.2010.31.03.595] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
35
|
Fang X, Liu K, Li C. Efficient Regio- and Stereoselective Formation of Azocan-2-ones via 8-Endo Cyclization of α-Carbamoyl Radicals. J Am Chem Soc 2010; 132:2274-83. [DOI: 10.1021/ja9082649] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xinqiang Fang
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Kun Liu
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Chaozhong Li
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| |
Collapse
|
36
|
Yamago S. Precision Polymer Synthesis by Degenerative Transfer Controlled/Living Radical Polymerization Using Organotellurium, Organostibine, and Organobismuthine Chain-Transfer Agents. Chem Rev 2009; 109:5051-68. [DOI: 10.1021/cr9001269] [Citation(s) in RCA: 369] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shigeru Yamago
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| |
Collapse
|
37
|
Mitamura T, Iwata K, Ogawa A. (PhTe)2-Mediated Intramolecular Radical Cyclization of o-Ethynylaryl Isocyanides Leading to Bistellurated Quinolines upon Visible-Light Irradiation. Org Lett 2009; 11:3422-4. [DOI: 10.1021/ol901267h] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Takenori Mitamura
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, Gakuen-cho 1-1, Nakaku, Sakai, Osaka 599-8531, Japan
| | - Kimiyo Iwata
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, Gakuen-cho 1-1, Nakaku, Sakai, Osaka 599-8531, Japan
| | - Akiya Ogawa
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, Gakuen-cho 1-1, Nakaku, Sakai, Osaka 599-8531, Japan
| |
Collapse
|
38
|
Tsuchida H, Tamura M, Hasegawa E. Cyclization and Ring-Expansion Processes Involving Samarium Diiodide Promoted Reductive Formation and Subsequent Oxidative Ring Opening of Cyclopropanol Derivatives. J Org Chem 2009; 74:2467-75. [DOI: 10.1021/jo802749g] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hiroyuki Tsuchida
- Department of Chemistry, Faculty of Science, Niigata University, Ikarashi-2 8050, Niigata 950-2181, Japan
| | - Mutsuko Tamura
- Department of Chemistry, Faculty of Science, Niigata University, Ikarashi-2 8050, Niigata 950-2181, Japan
| | - Eietsu Hasegawa
- Department of Chemistry, Faculty of Science, Niigata University, Ikarashi-2 8050, Niigata 950-2181, Japan
| |
Collapse
|
39
|
Yamago S, Matsumoto A. Arylthiols as Highly Chemoselective and Environmentally Benign Radical Reducing Agents. J Org Chem 2008; 73:7300-4. [DOI: 10.1021/jo801200b] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shigeru Yamago
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan, and Division of Molecular Materials Chemistry, Graduate School of Science, Osaka City University, Osaka 558-8585, Japan
| | - Atsushi Matsumoto
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan, and Division of Molecular Materials Chemistry, Graduate School of Science, Osaka City University, Osaka 558-8585, Japan
| |
Collapse
|
40
|
Podešva J, Hrubý M, Spěváček J, Hrdličková M, Netopilík M. A new chemical modification of liquid polybutadienes: Radical addition of aliphatic aldehydes onto pending vinyl groups. ACTA ACUST UNITED AC 2008. [DOI: 10.1002/pola.22720] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
41
|
Kyne SH, Schiesser CH, Matsubara H. Multiorbital Interactions during Acyl Radical Addition Reactions Involving Imines and Electron-Rich Olefins. J Org Chem 2007; 73:427-34. [DOI: 10.1021/jo701825y] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sara H. Kyne
- School of Chemistry, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Victoria 3010, Australia, and Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Carl H. Schiesser
- School of Chemistry, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Victoria 3010, Australia, and Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Hiroshi Matsubara
- School of Chemistry, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Victoria 3010, Australia, and Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| |
Collapse
|
42
|
Cougnon F, Feray L, Bazin S, Bertrand MP. Evaluation of phenylorganotellurium compounds as radical precursors in dialkylzinc-mediated radical addition to CN double bonds. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.09.014] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
43
|
Kim S, Kim S. Tin-Free Radical Carbon–Carbon Bond-Forming Reactions Based on α-Scission of Alkylsulfonyl Radicals. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2007. [DOI: 10.1246/bcsj.80.809] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
44
|
|
45
|
Ryu I, Uenoyama Y, Matsubara H. Carbonylative Approaches to α,β-Unsaturated Acyl Radicals and α-Ketenyl Radicals. Their Structure and Applications in Synthesis. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2006. [DOI: 10.1246/bcsj.79.1476] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
46
|
Zhao CQ, Huang X. Simple Preparation of Aryl Telluroesters and (2Z)-β-(Aryltelluro) cinnamic Esters. SYNTHETIC COMMUN 2006. [DOI: 10.1080/00397919708005025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Chang-Qiu Zhao
- a Department of Chemistry , Hangzhou University , Hangzhou, 310028, P. R. China
| | - Xian Huang
- a Department of Chemistry , Hangzhou University , Hangzhou, 310028, P. R. China
| |
Collapse
|
47
|
Chatgilialoglu C, Ferreri C, Lucarini M, Venturini A, Zavitsas AA. 5-exo-trig Versus 6-endo-trig Cyclization of Alk-5-enoyl Radicals: The Role of One-Carbon Ring Expansion. Chemistry 2006. [DOI: 10.1002/chem.19970030309] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
48
|
Schiesser CH. Taming the free radical shrew ? learning to control homolytic reactions at higher heteroatoms. Chem Commun (Camb) 2006:4055-65. [PMID: 17024249 DOI: 10.1039/b608150a] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Free radical chemistry has come a long way in a relatively short period of time. Armed with mechanistic and rate constant data, the synthetic practitioner can now apply free radical chemistry to the synthesis of many different classes of target molecule with confidence. This Feature Article highlights progress made in the understanding and application of free radical reactions at main group higher heteroatoms and demonstrates how this knowledge can be used to construct interesting higher heterocycles, many of which exhibit biological activity, through the use of intramolecular homolytic substitution chemistry.
Collapse
Affiliation(s)
- Carl H Schiesser
- Australian Research Council Centre for Free Radical Chemistry and Biotechnology, School of Chemistry, The University of Melbourne, Victoria, Australia.
| |
Collapse
|
49
|
Majumdar KC, Basu PK, Mukhopadhyay PP. Formation of five- and six-membered heterocyclic rings under radical cyclisation conditions. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.07.079] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
50
|
Kim S, Kim S, Otsuka N, Ryu I. Tin-Free Radical Carbonylation: Thiol Ester Synthesis Using Alkyl Allyl Sulfone Precursors, Phenyl Benzenethiosulfonate, and CO. Angew Chem Int Ed Engl 2005. [DOI: 10.1002/ange.200501606] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|