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Santalucia D, Bondanza M, Lipparini F, Ripszam M, Rossi N, Mandoli A. Breaking the Rules: On the Relative Stability of Some Methylencyclopropane and Methylcyclopropene Derivatives. Chemistry 2024; 30:e202400431. [PMID: 38483818 DOI: 10.1002/chem.202400431] [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: 01/31/2024] [Indexed: 04/11/2024]
Abstract
The structure of the spirocyclic product obtained by reacting catechol with 1,1-dichloro-2-(chloromethyl)cyclopropane is shown by NMR and X-ray analysis to be that of a 2-methylcyclopropene (MeCP), instead of the previously reported 2-methylenecyclopropane (MCP) one. The study of the equilibration between the two isomeric forms by experimental and computational means (including both Density Functional Theory - DFT - and Coupled Cluster with single, double, and perturbative triple excitations - CCSD(T) - calculations) revealed that, at variance with most of the alkylidenecyclopropane/alkylcyclopropene systems described to date, for the compounds of the present study the MeCP derivative is more stable by≈ 2.5-3.0 Kcal mol-1 than the MCP one. The extension of the DFT and CCSD(T) study to other spiro-MCP/MeCP pairs suggests that the origin of the unexpected shift of the equilibrium position can be tracked back to a combination of electronic and ring-strain effects. These findings lead to re-think a long-standing, and substantially undisputed belief in the area of unsaturated cyclopropane derivatives.
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Affiliation(s)
- Delio Santalucia
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via G. Moruzzi 13, 56126, Pisa, Italy
| | - Mattia Bondanza
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via G. Moruzzi 13, 56126, Pisa, Italy
| | - Filippo Lipparini
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via G. Moruzzi 13, 56126, Pisa, Italy
| | - Matyas Ripszam
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via G. Moruzzi 13, 56126, Pisa, Italy
| | - Nicolò Rossi
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via G. Moruzzi 13, 56126, Pisa, Italy
| | - Alessandro Mandoli
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via G. Moruzzi 13, 56126, Pisa, Italy
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2
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Bloomer BJ, Joyner IA, Garcia-Borràs M, Hu DB, Garçon M, Quest A, Ugarte Montero C, Yu IF, Clark DS, Hartwig JF. Enantio- and Diastereodivergent Cyclopropanation of Allenes by Directed Evolution of an Iridium-Containing Cytochrome. J Am Chem Soc 2024; 146:1819-1824. [PMID: 38190322 DOI: 10.1021/jacs.3c13011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2024]
Abstract
Alkylidene cyclopropanes (ACPs) are valuable synthetic intermediates because of their constrained structure and opportunities for further diversification. Although routes to ACPs are known, preparations of ACPs with control of both the configuration of the cyclopropyl (R vs S) group and the geometry of the alkene (E vs Z) are unknown. We describe enzymatic cyclopropanation of allenes with ethyl diazoacetate (EDA) catalyzed by an iridium-containing cytochrome (Ir(Me)-CYP119) that controls both stereochemical elements. Two mutants of Ir(Me)-CYP119 identified by 6-codon (6c, VILAFG) saturation mutagenesis catalyze the formation of (E)-ACPs with -93% to >99% ee and >99:1 E/Z ratio with just three rounds of 96 mutants. By four additional rounds of mutagenesis, an enzyme variant was identified that forms (Z)-ACPs with up to 94% ee and a 28:72 E/Z ratio. Computational studies show that the orientation of the carbene unit dictated by the mutated positions accounts for the stereoselectivity.
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Affiliation(s)
- Brandon J Bloomer
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Division of Chemical Sciences, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Isaac A Joyner
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Division of Chemical Sciences, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Marc Garcia-Borràs
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Girona 17003, Spain
| | - Derek B Hu
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Martí Garçon
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Division of Chemical Sciences, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Andrew Quest
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Consuelo Ugarte Montero
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Isaac F Yu
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Douglas S Clark
- Molecular Biophysics and Integrated Bioimaging, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - John F Hartwig
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Division of Chemical Sciences, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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3
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Affiliation(s)
- Hongen Cao
- School of Chemistry and Chemical Engineering Yangzhou University Yangzhou 225002 Jiangsu People's Republic of China
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education Research and Development Center for Fine Chemicals Guizhou University Guiyang 550025 Guizhou People's Republic of China
- School of Horticulture and Plant Protection Yangzhou University Yangzhou 225009 Jiangsu People's Republic of China
| | - Fenglin Chen
- School of Chemistry and Chemical Engineering Yangzhou University Yangzhou 225002 Jiangsu People's Republic of China
| | - Chenliang Su
- SZU-NUS Collaborative Innovation Center for Optoelectronic Science & Technology Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Optoelectronic Engineering Shenzhen University Shenzhen 518060 People's Republic of China
| | - Lei Yu
- School of Chemistry and Chemical Engineering Yangzhou University Yangzhou 225002 Jiangsu People's Republic of China
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4
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Reber KP, Gilbert IW, Strassfeld DA, Sorensen EJ. Synthesis of (+)-Lineariifolianone and Related Cyclopropenone-Containing Sesquiterpenoids. J Org Chem 2019; 84:5524-5534. [PMID: 30938526 DOI: 10.1021/acs.joc.9b00478] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A synthesis of the proposed structure of lineariifolianone has been achieved in eight steps and 9% overall yield starting from (+)-valencene, leading to a reassignment of the absolute configuration of this unusual cyclopropenone-containing natural product. Key steps in the synthetic route include kinetic protonation of an enolate to epimerize the C7 stereocenter and a stereoconvergent epoxide opening to establish the trans-diaxial diol functionality. The syntheses of the enantiomers of two other closely related natural products are also reported, confirming that all three compounds belong to the eremophilane class of sesquiterpenoids.
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Affiliation(s)
- Keith P Reber
- Department of Chemistry , Towson University , Towson , Maryland 21252 , United States
| | - Ian W Gilbert
- Department of Chemistry , Towson University , Towson , Maryland 21252 , United States
| | - Daniel A Strassfeld
- Department of Chemistry and Chemical Biology , Harvard University , Cambridge , Massachusetts 02138 , United States
| | - Erik J Sorensen
- Department of Chemistry , Princeton University , Princeton , New Jersey 08544 , United States
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5
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Ernouf G, Brayer JL, Meyer C, Cossy J. Sigmatropic rearrangements of cyclopropenylcarbinol derivatives. Access to diversely substituted alkylidenecyclopropanes. Beilstein J Org Chem 2019; 15:333-350. [PMID: 30800182 PMCID: PMC6369978 DOI: 10.3762/bjoc.15.29] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Accepted: 01/08/2019] [Indexed: 12/21/2022] Open
Abstract
Cyclopropenes constitute useful precursors of other classes of compounds incorporating a three-membered ring. Although the transformation of substituted cyclopropenes into alkylidenecyclopropanes can be accomplished through different strategies, this review is focusing specifically on the use of [2,3]- and [3,3]-sigmatropic rearrangements involving cyclopropenylcarbinol derivatives as substrates. These sigmatropic rearrangements, which have been developed in recent years, allow a remarkably efficient and stereoselective access to a wide variety of heterosubstituted and/or functionalized alkylidenecyclopropanes which would not be readily accessible by other strategies. The different [2,3]- and [3,3]-sigmatropic rearrangements of cyclopropenylcarbinol derivatives disclosed to date, as well as the analysis of their substrate scope and some applications of the products arising from those reactions, are presented in this review.
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Affiliation(s)
- Guillaume Ernouf
- Laboratory of Organic Chemistry, Institute of Chemistry, Biology, Innovation (CBI), ESPCI Paris, CNRS (UMR 8231), PSL Research University, 10 rue Vauquelin, 75231 Paris Cedex 05, France
| | - Jean-Louis Brayer
- Minakem, Parc Naturel Régional Scarpe-Escaut, 145 chemin des lilas, 59310 Beuvry-la-Forêt, France
| | - Christophe Meyer
- Laboratory of Organic Chemistry, Institute of Chemistry, Biology, Innovation (CBI), ESPCI Paris, CNRS (UMR 8231), PSL Research University, 10 rue Vauquelin, 75231 Paris Cedex 05, France
| | - Janine Cossy
- Laboratory of Organic Chemistry, Institute of Chemistry, Biology, Innovation (CBI), ESPCI Paris, CNRS (UMR 8231), PSL Research University, 10 rue Vauquelin, 75231 Paris Cedex 05, France
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6
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Ramana Murthy AV, Narendar V, Kumar NS, Aparna P, Durga Bhavani AK, Gautier F, Barillé-Nion S, Juin P, Mosset P, Grée R, Levoin N. Targeting PUMA/Bcl-xL interaction by new specific compounds to unleash apoptotic process in cancer cells. Eur J Med Chem 2019; 162:334-347. [PMID: 30453244 DOI: 10.1016/j.ejmech.2018.10.069] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 10/01/2018] [Accepted: 10/31/2018] [Indexed: 12/31/2022]
Abstract
We describe the first examples of small molecules able to disrupt the nanomolar interaction between the pro-apoptotic protein PUMA and its anti-apoptotic counterpart BcL-xL in malignant cells. Based on molecular modelling studies, we propose a rationale to this result, through a new "bottle-opener"-type strategy which could be of general use in the area of protein-protein interaction studies.
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Affiliation(s)
- Appala Venkata Ramana Murthy
- Chemveda Life Sciences India Pvt. Ltd, #B-11/1, IDA Uppal, Hyderabad, 500039, Telangana, India; Jawaharlal Nehru Technological University Hyderabad, Kukatpally, Hyderabad, 500 085, Telangana, India
| | - Vennu Narendar
- Chemveda Life Sciences India Pvt. Ltd, #B-11/1, IDA Uppal, Hyderabad, 500039, Telangana, India
| | | | - Pasula Aparna
- Jawaharlal Nehru Technological University Hyderabad, Kukatpally, Hyderabad, 500 085, Telangana, India
| | | | - Fabien Gautier
- UMR 892 INSERM /6299 CNRS / Université de Nantes, Team 8 "Cell Survival and Tumor Escape in Breast Cancer", Institut de Recherche Thérapeutique de l'Université de Nantes, 8 quai Moncousu, BP 70721, 44007, Nantes Cedex 1, France; Institut de Cancérologie de l'Ouest, Centre de Lutte Contre le Cancer René Gauducheau, Boulevard Jacques Monod, 44805, Saint Herblain-Nantes Cedex, France; Plateforme IMPACT(®), Biogenouest Institut de Recherche Thérapeutique de l'Université de Nantes, 8, quai Moncousu, BP 70721 44007, Nantes Cedex 1, France
| | - Sophie Barillé-Nion
- UMR 892 INSERM /6299 CNRS / Université de Nantes, Team 8 "Cell Survival and Tumor Escape in Breast Cancer", Institut de Recherche Thérapeutique de l'Université de Nantes, 8 quai Moncousu, BP 70721, 44007, Nantes Cedex 1, France
| | - Philippe Juin
- UMR 892 INSERM /6299 CNRS / Université de Nantes, Team 8 "Cell Survival and Tumor Escape in Breast Cancer", Institut de Recherche Thérapeutique de l'Université de Nantes, 8 quai Moncousu, BP 70721, 44007, Nantes Cedex 1, France
| | - Paul Mosset
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F-35000, Rennes, France
| | - René Grée
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F-35000, Rennes, France.
| | - Nicolas Levoin
- Bioprojet-Biotech, 4 rue du Chesnay Beauregard, BP 96205, 35762, Saint Grégoire, France.
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7
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Ernouf G, Brayer JL, Folléas B, Demoute JP, Meyer C, Cossy J. Synthesis of Alkylidene(gem-Difluorocyclopropanes) from Propargyl Glycolates by a One-Pot Difluorocyclopropenation/Ireland–Claisen Rearrangement Sequence. J Org Chem 2017; 82:3965-3975. [PMID: 28277662 DOI: 10.1021/acs.joc.7b00197] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Guillaume Ernouf
- Laboratoire de Chimie Organique, Institute of Chemistry,
Biology and Innovation (CBI), ESPCI Paris, CNRS (UMR8231), PSL Research University, 10 rue Vauquelin, 75231 Paris Cedex 05, France
| | | | - Benoît Folléas
- Diverchim, 6 rue du
Noyer, ZAC du Moulin, 95734 Roissy CDG, France
| | | | - Christophe Meyer
- Laboratoire de Chimie Organique, Institute of Chemistry,
Biology and Innovation (CBI), ESPCI Paris, CNRS (UMR8231), PSL Research University, 10 rue Vauquelin, 75231 Paris Cedex 05, France
| | - Janine Cossy
- Laboratoire de Chimie Organique, Institute of Chemistry,
Biology and Innovation (CBI), ESPCI Paris, CNRS (UMR8231), PSL Research University, 10 rue Vauquelin, 75231 Paris Cedex 05, France
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8
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Barroso R, Jiménez A, Pérez-Aguilar MC, Cabal MP, Valdés C. Synthesis of 1,3-diaryl-3-trifluoromethylcyclopropenes by transition-metal-free reaction of 2,2,2-trifluoroacetophenone tosylhydrazones with alkynes: the effect of the trifluoromethyl group. Chem Commun (Camb) 2016; 52:3677-80. [PMID: 26856259 DOI: 10.1039/c5cc10472f] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
1,3-Diaryl-3-trifluoromethylcyclopropenes and 2-aryl- or 2-alkyl-1,3-diaryl-3-trifluoromethylcyclopropenes are prepared in a very simple way by reaction between 1,1,1-trifluoroacetophenone tosylhydrazones and terminal or internal alkynes, respectively, in a base promoted process that does not require the presence of any metal catalyst. The essential role of the trifluoromethyl group, which enables the formation of the cyclopropenes instead of the expected pyrazoles, has been computationally investigated, suggesting the participation of a free carbene.
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Affiliation(s)
- Raquel Barroso
- Departamento de Química Orgánica e Inorgánica and Instituto Universitario de Química Organometálica "Enrique Moles", Universidad de Oviedo, c/Julián Clavería 8, Oviedo, 33006, Spain.
| | - Azucena Jiménez
- Departamento de Química Orgánica e Inorgánica and Instituto Universitario de Química Organometálica "Enrique Moles", Universidad de Oviedo, c/Julián Clavería 8, Oviedo, 33006, Spain.
| | - M Carmen Pérez-Aguilar
- Departamento de Química Orgánica e Inorgánica and Instituto Universitario de Química Organometálica "Enrique Moles", Universidad de Oviedo, c/Julián Clavería 8, Oviedo, 33006, Spain.
| | - María-Paz Cabal
- Departamento de Química Orgánica e Inorgánica and Instituto Universitario de Química Organometálica "Enrique Moles", Universidad de Oviedo, c/Julián Clavería 8, Oviedo, 33006, Spain.
| | - Carlos Valdés
- Departamento de Química Orgánica e Inorgánica and Instituto Universitario de Química Organometálica "Enrique Moles", Universidad de Oviedo, c/Julián Clavería 8, Oviedo, 33006, Spain.
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9
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Abstract
The discovery of a series of novel organic reactions has made methylenecyclopropanes (MCPs) some of the most popular building blocks in synthetic organic chemistry during the past two decades. Among reported works, the construction of heterocycles from MCPs has highlighted new synthetic methodologies that afford more opportunities for the quick synthesis of elaborately substituted products, and this should draw a great deal of attention. However, reviews in this area are insufficient, and the latest monograph on heterocycle synthesis from MCPs was published 12 years ago. This review aims to summarize the novel organic reactions of MCPs to produce heterocycles published in recent years, which have provided specific and powerful tools for organic synthesis.
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Affiliation(s)
- Lei Yu
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China.
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10
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Tran G, Gomez Pardo D, Tsuchiya T, Hillebrand S, Vors JP, Cossy J. Modular, Concise, and Efficient Synthesis of Highly Functionalized 5-Fluoropyridazines by a [2 + 1]/[3 + 2]-Cycloaddition Sequence. Org Lett 2015; 17:3414-7. [PMID: 26125999 DOI: 10.1021/acs.orglett.5b01370] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An easy access to 5-fluoropyridazines by a [2 + 1]/[3 + 2]-cycloaddition sequence between terminal alkynes, a difluorocarbene, and a diazo compound is reported. This approach does not necessitate the isolation of any intermediates, and a wide range of novel 5-fluoropyridazines was synthesized from readily available starting materials. Additionally, these compounds were used as a platform to access novel and highly diversified pyridazines.
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Affiliation(s)
- Gaël Tran
- Laboratoire de Chimie Organique, Institute of Chemistry, Biology and Innovation (CBI), ESPCI ParisTech, UMR 8231, PSL Research University. 10 rue Vauquelin, Paris 75231 Cedex 05, France
| | - Domingo Gomez Pardo
- Laboratoire de Chimie Organique, Institute of Chemistry, Biology and Innovation (CBI), ESPCI ParisTech, UMR 8231, PSL Research University. 10 rue Vauquelin, Paris 75231 Cedex 05, France
| | - Tomoki Tsuchiya
- Laboratoire de Chimie Organique, Institute of Chemistry, Biology and Innovation (CBI), ESPCI ParisTech, UMR 8231, PSL Research University. 10 rue Vauquelin, Paris 75231 Cedex 05, France
| | - Stefan Hillebrand
- Laboratoire de Chimie Organique, Institute of Chemistry, Biology and Innovation (CBI), ESPCI ParisTech, UMR 8231, PSL Research University. 10 rue Vauquelin, Paris 75231 Cedex 05, France
| | - Jean-Pierre Vors
- Laboratoire de Chimie Organique, Institute of Chemistry, Biology and Innovation (CBI), ESPCI ParisTech, UMR 8231, PSL Research University. 10 rue Vauquelin, Paris 75231 Cedex 05, France
| | - Janine Cossy
- Laboratoire de Chimie Organique, Institute of Chemistry, Biology and Innovation (CBI), ESPCI ParisTech, UMR 8231, PSL Research University. 10 rue Vauquelin, Paris 75231 Cedex 05, France
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11
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Iagafarova IE, Vorobyeva DV, Peregudov AS, Osipov SN. CF3-Carbenoid C-H Functionalization of (Hetero)arenes under Chelation-Controlled RhIIICatalysis. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500545] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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12
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Recent developments in the synthesis and reactivity of methylene- and alkylidenecyclopropane derivatives. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.04.057] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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13
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Sabbatani J, Huang X, Veiros LF, Maulide N. Gold-catalyzed intermolecular synthesis of alkylidenecyclopropanes through catalytic allene activation. Chemistry 2014; 20:10636-9. [PMID: 24976605 DOI: 10.1002/chem.201402935] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Indexed: 11/09/2022]
Abstract
A stereoselective gold(I)-catalyzed intermolecular cyclopropanation of allenamides with stabilized sulfonium ylides is reported. This transformation enables the direct synthesis of diacceptor alkylidenecyclopropanes and proceeds under very mild conditions through allene activation.
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Affiliation(s)
- Juliette Sabbatani
- Faculty of Chemistry, Institute of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090 Vienna (Austria)
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14
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Brandi A, Cicchi S, Cordero FM, Goti A. Progress in the synthesis and transformations of alkylidenecyclopropanes and alkylidenecyclobutanes. Chem Rev 2014; 114:7317-420. [PMID: 24927495 DOI: 10.1021/cr400686j] [Citation(s) in RCA: 209] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Alberto Brandi
- Dipartimento di Chimica "Ugo Schiff", Università degli Studi di Firenze , Via della Lastruccia 13, I-50019-Sesto Fiorentino, Italy
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15
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Tsyshchuk IE, Vorobyeva DV, Peregudov AS, Osipov SN. Cu-Catalyzed Carbenoid Functionalization of Indoles by Methyl 3,3,3-Trifluoro-2-diazopropionate. European J Org Chem 2014. [DOI: 10.1002/ejoc.201301734] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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16
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Abstract
Ozonation of methylenecyclopropanes bearinggem-disubstituted electron-withdrawing groups (EWG) gave ring-opened oxidative products in moderate to good yields.
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Affiliation(s)
- Rui Sang
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032, P. R. China
| | - Xiang-Ying Tang
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032, P. R. China
| | - Min Shi
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032, P. R. China
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