1
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Mondal R, Agbaria M, Cohen O, Nairoukh Z. Brook Rearrangement as Trigger for Dearomatization Reaction: Synthesis of Non-Aromatic N-Heterocycles. Chemistry 2024; 30:e202303588. [PMID: 37930139 DOI: 10.1002/chem.202303588] [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: 10/31/2023] [Revised: 11/05/2023] [Accepted: 11/06/2023] [Indexed: 11/07/2023]
Abstract
The [1,2]-Brook rearrangement stands as a potent technique for constructing complex molecules. In this study, we showcase its power in the dearomatization of aromatic N-heterocycles. Through a concise four-step process that integrates lithiation, nucleophilic addition, Brook rearrangement and dearomatization reaction, we demonstrate a versatile strategy for generating diverse non-aromatic N-heterocycles which exhibit ambident reactivities. Various acyl silanes, halo-pyridines, and quinolines have been explored within this context. The synthetic utility of this methodology is demonstrated through the construction of complex architectures.
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Affiliation(s)
- Rajarshi Mondal
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Mohamed Agbaria
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Orit Cohen
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
| | - Zackaria Nairoukh
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, 9190401, Israel
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2
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Abstract
The various facets of the chemistry of cyclopropane derivatives, the smallest carbocycle, are amazingly diverse and continue to fascinate theoreticians, synthetic or structural chemists having interest in fundamental physical, medicinal chemistry, and natural product synthesis. The challenges generated by this intriguing cyclic arrangement of only three tetravalent carbons represent a wide area of the chemical spectrum. From fundamental aspects of bonding through the synthesis of highly strained molecules, the understanding of the mode of action in biological systems to the selective cleavage into acyclic substrates makes the chemistry of these small rings fascinating. Therefore, efficient routes to prepare differently polysubstituted cyclopropanes have always been of a primordial importance. In the past decade, we and others have expanded the scope of the carbometalation reaction of cyclopropenes as a broad and general method to the formation of stereodefined cyclopropane derivatives. Although cyclopropenes, with their even higher strain energy, easily undergo addition reactions of organometallic reagents, their carbometalation reactions generate new regio-, diastereo-, and enantioselectivity issues that needed to be addressed. These various stereochemical aspects accompanied our research from its origins to today, and we are proposing in this Account, a didactic overview of the different ways by which cyclopropenes can lead to the formation of polysubstituted cyclopropanes or open-products possessing several stereogenic centers as a single regio- and diastereomer.We initially launched our research campaign on the chemistry of these strained three-membered rings by the regio- and diastereoselective copper-catalyzed carbomagnesiation of enantiomerically enriched cyclopropenyl carbinols. The directing alcohol governed both the regio- and diastereoselectivity of the addition and also served as a good leaving group as it undergoes a selective 1,2-elimination reaction to provide enantioenriched alkylidenecyclopropanes in excellent yields and enantiomeric excesses. Then, we turned our attention to the regio- and stereoselective synthesis of stereodefined tri- and tetrasubstituted cyclopropanes through the diastereoselective addition to sp2- monosubstituted cyclopropenyl ester derivatives. With the aim to further expand this concept to the formation of penta- and hexa-substituted cyclopropanes as single isomer, we had first to design the preparation of the required 1,2-disubstituted cyclopropenes that would control the regioselective addition of the organometallic derivatives. The synthesis of penta- and hexa-substituted cyclopropanes was then reported for the first time as a single regio- and diastereomer. It should be noted that the in situ formed cyclopropyl-metal intermediate is configurationally stable and can be subsequently functionalized with pure retention of the configuration by addition of electrophiles. Then, the enantioselective-catalyzed carbometalation reaction of achiral cyclopropenes allowed the synthesis of several new classes of cyclopropane derivatives in high enantiomeric ratios. Finally, by combining the regio- and diastereoselective carbometalation reaction of a cyclopropene with a subsequent reaction of the resulting cyclopropylmetal species, a selective carbon-carbon bond cleavage was observed to lead to the preparation of acyclic substrates possessing several stereocenters including a quaternary carbon stereogenic center. Our original vision of using strain within an embedded double bond in a three-membered ring has provided new routes to the stereoselective synthesis of polysubstituted cyclopropanes and has been extremely successful, as it represents a current new tool for the synthesis of persubstituted cyclopropanes as a single diastereomer.
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3
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Abstract
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A new approach to
polysubstituted spiropentanes is developed
through
a regio- and diastereoselective carbometalation of sp2-disubstituted
cyclopropenes. The control of selectivity originates from a combined syn-facial diastereoselective carbometalation with a regio-directed
addition. The regio-controlling element subsequently serves as a leaving
group in an intramolecular nucleophilic substitution. This method
allows the preparation of various polysubstituted spiropentanes with
up to five contiguous stereocenters.
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Affiliation(s)
- Yair Cohen
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Technion City, Haifa, 32000, Israel
| | - Dor Toledano
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Technion City, Haifa, 32000, Israel
| | - Ilan Marek
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Technion City, Haifa, 32000, Israel
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4
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Cohen A, Kaushansky A, Marek I. Mechanistic Insights on the Selectivity of the Tandem Heck-Ring-Opening of Cyclopropyldiol Derivatives. JACS AU 2022; 2:687-696. [PMID: 35373195 PMCID: PMC8970019 DOI: 10.1021/jacsau.1c00547] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Indexed: 06/14/2023]
Abstract
The preparation of a new class of alkenyl cyclopropyl diols, easily available through a copper-catalyzed carbometalation reaction of cyclopropenes, has enabled the study of key mechanistic aspects of the tandem Heck-cyclopropane ring-opening reaction. Utilizing these substrates containing two distinct hydroxyl groups allowed us to examine parameters affecting the reaction outcome and selectivity. The combination of these experimental results with detailed DFT studies shed light on the mechanism governing the regio- and stereoselectivity of the cyclopropane ring-opening. A thorough investigation displayed the dual roles fulfilled by the hydroxyl group during the reaction, which is key to this remarkable transformation. In addition to its mechanistic implication, the reaction granted access to various lactones possessing up to four stereocenters as a single diastereomer, conveniently prepared in only two catalytic steps from easily accessible achiral cyclopropenes.
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5
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Lv K, Bao X. Mechanistic differences between aryl iodide electrophiles and pronucleophiles in Pd-catalyzed coupling with cyclopropenes: a DFT study. Org Chem Front 2022. [DOI: 10.1039/d2qo00966h] [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
Computational studies were carried out to investigate the mechanisms of Pd-catalyzed ring-opening reactions of cyclopropenes with pronucleophiles (H-Nu) and aryl iodide electrophiles, respectively.
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Affiliation(s)
- Kang Lv
- Innovation Center for Chemical Sciences, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou Industrial Park, Suzhou, Jiangsu 215123, China
- School of Chemistry, Chemical Engineering and Materials, Jining University, Qufu, Shandong 273155, China
| | - Xiaoguang Bao
- Innovation Center for Chemical Sciences, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou Industrial Park, Suzhou, Jiangsu 215123, China
- Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, Jiangsu 215123, China
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6
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Kou L, Dai P, Bao X. Mechanistic Insights into the Rh(I)/Rh
2
(II)‐Catalyzed Divergent Ring‐Opening of Cyclopropenes: A Computational Study. ChemCatChem 2020. [DOI: 10.1002/cctc.202001149] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Luyao Kou
- College of Chemistry Chemical Engineering and Materials Science Soochow University 199 Ren-Ai Road Suzhou Industrial Park Suzhou Jiangsu 215123 P.R. China
| | - Ping Dai
- College of Chemistry Chemical Engineering and Materials Science Soochow University 199 Ren-Ai Road Suzhou Industrial Park Suzhou Jiangsu 215123 P.R. China
| | - Xiaoguang Bao
- College of Chemistry Chemical Engineering and Materials Science Soochow University 199 Ren-Ai Road Suzhou Industrial Park Suzhou Jiangsu 215123 P.R. China
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7
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Pierrot D, Marek I. Stereospecific Reactions Leading to Allylboronic Esters Within Acyclic Systems Bearing Distant Stereocenters. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202010135] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- David Pierrot
- Schulich Faculty of Chemistry, Technion— Israel Institute of Technology Technion City 3200009 Haifa Israel
| | - Ilan Marek
- Schulich Faculty of Chemistry, Technion— Israel Institute of Technology Technion City 3200009 Haifa Israel
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8
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Pierrot D, Marek I. Stereospecific Reactions Leading to Allylboronic Esters Within Acyclic Systems Bearing Distant Stereocenters. Angew Chem Int Ed Engl 2020; 59:20434-20438. [PMID: 32757448 DOI: 10.1002/anie.202010135] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 08/05/2020] [Indexed: 11/11/2022]
Abstract
The preparation of acyclic molecules featuring congested stereocenters in a 1,4-relationship in only three catalytic steps from commercially available building blocks is reported. This approach involves a diastereoselective diboration of alkenyl cyclopropyl methanol derivatives followed by a regioselective exergonic ring fragmentation. The starting materials can be prepared enantiomerically enriched and all substituents can be interconverted, therefore, this strategy allows a large variety of diversely functionalized allylboronic esters possessing distant tetrasubstituted stereocenters with high diastereoselectivity.
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Affiliation(s)
- David Pierrot
- Schulich Faculty of Chemistry, Technion-, Israel Institute of Technology, Technion City, 3200009, Haifa, Israel
| | - Ilan Marek
- Schulich Faculty of Chemistry, Technion-, Israel Institute of Technology, Technion City, 3200009, Haifa, Israel
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9
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Prasad Raiguru B, Nayak S, Ranjan Mishra D, Das T, Mohapatra S, Priyadarsini Mishra N. Synthetic Applications of Cyclopropene and Cyclopropenone: Recent Progress and Developments. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000193] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
| | - Sabita Nayak
- Department of ChemistryRavenshaw University Cuttack Odisha India
| | | | - Tapaswini Das
- Department of ChemistryRavenshaw University Cuttack Odisha India
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10
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Cohen Y, Cohen A, Marek I. Creating Stereocenters within Acyclic Systems by C–C Bond Cleavage of Cyclopropanes. Chem Rev 2020; 121:140-161. [DOI: 10.1021/acs.chemrev.0c00167] [Citation(s) in RCA: 80] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yair Cohen
- Schulich Faculty of Chemistry, Technion − Israel Institute of Technology, Technion City, Haifa 3200009, Israel
| | - Anthony Cohen
- Schulich Faculty of Chemistry, Technion − Israel Institute of Technology, Technion City, Haifa 3200009, Israel
| | - Ilan Marek
- Schulich Faculty of Chemistry, Technion − Israel Institute of Technology, Technion City, Haifa 3200009, Israel
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11
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Vicente R. C–C Bond Cleavages of Cyclopropenes: Operating for Selective Ring-Opening Reactions. Chem Rev 2020; 121:162-226. [DOI: 10.1021/acs.chemrev.0c00151] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Rubén Vicente
- Facultad de Quı́mica, Departamento de Quı́mica Orgánica e Inorgánica, Instituto de Quı́mica Organometálica Enrique Moles, Universidad de Oviedo, 33006 Oviedo, Spain
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12
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Ma JH, Li L, Sun YL, Xu Z, Bai XF, Yang KF, Cao J, Cui YM, Yin GW, Xu LW. Silicon-mediated enantioselective synthesis of structurally diverse α-amino acid derivatives. Sci China Chem 2020. [DOI: 10.1007/s11426-020-9768-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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13
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Lanke V, Marek I. Nucleophilic Substitution at Quaternary Carbon Stereocenters. J Am Chem Soc 2020; 142:5543-5548. [DOI: 10.1021/jacs.0c01133] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Veeranjaneyulu Lanke
- Schulich Faculty of Chemistry, Technion − Israel Institute of Technology, Technion City 3200009, Haifa, Israel
| | - Ilan Marek
- Schulich Faculty of Chemistry, Technion − Israel Institute of Technology, Technion City 3200009, Haifa, Israel
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14
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Abstract
As readily accessible strained carbocycles, cyclopropenes show a diverse range of reactivities, and a lot of novel and useful transformations have been developed.
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Affiliation(s)
- Penghua Li
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- School of Chemistry & Molecular Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Xiaoyu Zhang
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- School of Chemistry & Molecular Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Min Shi
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals
- School of Chemistry & Molecular Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
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15
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Pirenne V, Traboulsi I, Rouvière L, Lusseau J, Massip S, Bassani DM, Robert F, Landais Y. p-Anisaldehyde-Photosensitized Sulfonylcyanation of Chiral Cyclobutenes: Enantioselective Access to Cyclic and Acyclic Systems Bearing All-Carbon Quaternary Stereocenters. Org Lett 2019; 22:575-579. [DOI: 10.1021/acs.orglett.9b04345] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Vincent Pirenne
- CNRS, Bordeaux
INP, ISM, UMR 5255, University of Bordeaux, F-33400 Talence, France
| | - Iman Traboulsi
- CNRS, Bordeaux
INP, ISM, UMR 5255, University of Bordeaux, F-33400 Talence, France
| | - Lisa Rouvière
- CNRS, Bordeaux
INP, ISM, UMR 5255, University of Bordeaux, F-33400 Talence, France
| | - Jonathan Lusseau
- CNRS, Bordeaux
INP, ISM, UMR 5255, University of Bordeaux, F-33400 Talence, France
| | - Stéphane Massip
- European Institute of Chemistry and Biology (IECB), University of Bordeaux, 2 Rue Robert Escarpit, 33600 Pessac, France
| | - Dario M. Bassani
- CNRS, Bordeaux
INP, ISM, UMR 5255, University of Bordeaux, F-33400 Talence, France
| | - Frédéric Robert
- CNRS, Bordeaux
INP, ISM, UMR 5255, University of Bordeaux, F-33400 Talence, France
| | - Yannick Landais
- CNRS, Bordeaux
INP, ISM, UMR 5255, University of Bordeaux, F-33400 Talence, France
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16
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Lanke V, Zhang FG, Kaushansky A, Marek I. Diastereoselective ring opening of fully-substituted cyclopropanes via intramolecular Friedel-Crafts alkylation. Chem Sci 2019; 10:9548-9554. [PMID: 32055326 PMCID: PMC6979362 DOI: 10.1039/c9sc03832a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 08/26/2019] [Indexed: 12/15/2022] Open
Abstract
We herein disclose a diastereoselective ring opening of non-donor-acceptor cyclopropanes via an intramolecular Friedel-Crafts alkylation en route to functionalized dihydronaphthalene scaffolds possessing quaternary carbon stereocentres. The transformation proceeds through a selective bond breaking at the most alkylated carbon centre with a pure retention of configuration. Mechanistic investigations and computational studies revealed that alkoxy functionality is the key for selective bond breaking leading to a complete retention of configuration.
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Affiliation(s)
- Veeranjaneyulu Lanke
- Schulich Faculty of Chemistry , Technion - Israel Institute of Technology , Technion City 3200009 , Haifa , Israel .
| | - Fa-Guang Zhang
- Schulich Faculty of Chemistry , Technion - Israel Institute of Technology , Technion City 3200009 , Haifa , Israel .
| | - Alexander Kaushansky
- Schulich Faculty of Chemistry , Technion - Israel Institute of Technology , Technion City 3200009 , Haifa , Israel .
| | - Ilan Marek
- Schulich Faculty of Chemistry , Technion - Israel Institute of Technology , Technion City 3200009 , Haifa , Israel .
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17
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Song T, Arseniyadis S, Cossy J. Asymmetric Synthesis of α-Quaternary γ-Lactams through Palladium-Catalyzed Asymmetric Allylic Alkylation. Org Lett 2019; 21:603-607. [DOI: 10.1021/acs.orglett.8b03613] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Tao Song
- Laboratoire de Chimie Organique, Institute of Chemistry, Biology and Innovation (CBI), ESPCI Paris/CNRS/PSL Research University, 10 rue Vauquelin, 75231 Paris Cedex 05, France
| | - Stellios Arseniyadis
- Laboratoire de Chimie Organique, Institute of Chemistry, Biology and Innovation (CBI), ESPCI Paris/CNRS/PSL Research University, 10 rue Vauquelin, 75231 Paris Cedex 05, France
- Queen Mary University of London, School of Biological and Chemical Sciences, Mile End Road, London, E1 4NS, U.K
| | - Janine Cossy
- Laboratoire de Chimie Organique, Institute of Chemistry, Biology and Innovation (CBI), ESPCI Paris/CNRS/PSL Research University, 10 rue Vauquelin, 75231 Paris Cedex 05, France
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18
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Tugny C, Zhang FG, Marek I. Versatility in the Brook Rearrangement for the Selective Ring-Opening of Three-Membered Rings. Chemistry 2019; 25:205-209. [PMID: 30294820 DOI: 10.1002/chem.201805006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Indexed: 12/21/2022]
Abstract
From a single α-silylated carbinol intermediate, easily accessible by carbometallation of cyclopropenes, various scaffolds featuring a quaternary carbon stereocenter could be obtained selectively. The selectivity towards these different products was achieved by either changing the experimental conditions or the nature of the organometallic species involved.
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Affiliation(s)
- Coralie Tugny
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Technion City, 3200009, Haifa, Israel
| | - Fa-Guang Zhang
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Technion City, 3200009, Haifa, Israel
| | - Ilan Marek
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Technion City, 3200009, Haifa, Israel
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19
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Yasui M, Ota R, Tsukano C, Takemoto Y. Synthesis of cis-/All- cis-Substituted Cyclopropanes through Stereocontrolled Metalation and Pd-Catalyzed Negishi Coupling. Org Lett 2018; 20:7656-7660. [PMID: 30462517 DOI: 10.1021/acs.orglett.8b03390] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
We have developed a direct method for the synthesis of cis-substituted cyclopropanes from a cyclopropanecarboxamide through stereocontrolled metalation and Negishi coupling. Under the optimized reaction conditions, various substituents, including di/trisubstituted alkenes and aryl groups, were introduced in a stereoselective manner using a simple amide directing group that could subsequently be converted into an ester. Furthermore, this method was applicable to the synthesis of all- cis-substituted cyclopropanes bearing three different substituents, which are highly congested and strained molecules.
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Affiliation(s)
- Motohiro Yasui
- Graduate School of Pharmaceutical Sciences , Kyoto University , Yoshida, Sakyo-ku, Kyoto 606-8501 , Japan
| | - Rina Ota
- Graduate School of Pharmaceutical Sciences , Kyoto University , Yoshida, Sakyo-ku, Kyoto 606-8501 , Japan
| | - Chihiro Tsukano
- Graduate School of Pharmaceutical Sciences , Kyoto University , Yoshida, Sakyo-ku, Kyoto 606-8501 , Japan
| | - Yoshiji Takemoto
- Graduate School of Pharmaceutical Sciences , Kyoto University , Yoshida, Sakyo-ku, Kyoto 606-8501 , Japan
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20
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Dian L, Marek I. Asymmetric Preparation of Polysubstituted Cyclopropanes Based on Direct Functionalization of Achiral Three-Membered Carbocycles. Chem Rev 2018; 118:8415-8434. [DOI: 10.1021/acs.chemrev.8b00304] [Citation(s) in RCA: 106] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Longyang Dian
- Schulich Faculty of Chemistry, Technion − Israel Institute of Technology, Haifa 32000, Israel
| | - Ilan Marek
- Schulich Faculty of Chemistry, Technion − Israel Institute of Technology, Haifa 32000, Israel
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21
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Bruffaerts J, Pierrot D, Marek I. Efficient and stereodivergent synthesis of unsaturated acyclic fragments bearing contiguous stereogenic elements. Nat Chem 2018; 10:1164-1170. [PMID: 30150723 PMCID: PMC6197432 DOI: 10.1038/s41557-018-0123-7] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2018] [Accepted: 07/10/2018] [Indexed: 12/29/2022]
Abstract
Synthetic organic strategies that enable the catalytic and rapid assembly of a large array of organic compounds possessing multiple stereocenters in acyclic systems are somewhat rare, especially when it comes to reaching today’s high standards of efficiency and selectivity. In particular, the catalytic preparation of a three-dimensional molecular layout of a simple acyclic hydrocarbon skeleton possessing several stereocenters from simple and readily available reagents still represents a vastly uncharted domain. Here, we report a rapid, modular, stereodivergent and diversity-oriented unified strategy to construct acyclic molecular frameworks bearing up to four contiguous and congested stereogenic elements, with remarkably high levels of stereocontrol and in only three catalytic steps from commercially available alkynes. A regio- and diastereoselective catalytic Heck migratory insertion reaction of alkenylcyclopropyl carbinols merging selective C–C bond cleavage of a cyclopropane represents the key step.
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Affiliation(s)
- Jeffrey Bruffaerts
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, Israel
| | - David Pierrot
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, Israel
| | - Ilan Marek
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, Israel.
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22
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Edwards A, Rubin M. Directed Cu(I)-Catalyzed Carbomagnesiation of 1-Arylcycloprop-2-ene-1-carboxamides En Route to Densely Substituted Functionalized Cyclopropanes. J Org Chem 2018; 83:8426-8448. [PMID: 29929370 DOI: 10.1021/acs.joc.8b01063] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Copper-catalyzed, directed addition of Grignard reagents across the strained C═C bond of cyclopropene-3-carboxamides was developed. It was demonstrated that the amide functionality serves as an ultimate directing group allowing for highly efficient control of diastereoselectivity of addition including stereoselectivity of electrophilic trapping with prochiral aldehydes. Also, regioselectivity of carbomagnesiation of cyclopropenes with a monosubstituted double bond is investigated. It was shown that in many cases this selectivity is controlled by steric factors and allows for preparation of products with a "reversed" regiochemistry.
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Affiliation(s)
- Andrew Edwards
- Department of Chemistry , University of Kansas , 1567 Irving Hill Road , Lawrence , Kansas 66045 , United States
| | - Michael Rubin
- Department of Chemistry , University of Kansas , 1567 Irving Hill Road , Lawrence , Kansas 66045 , United States.,Department of Chemistry , North Caucasus Federal University , 1a Pushkin Street , Stavropol 355009 , Russian Federation
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23
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Verma RS, Pandey CB, Kumar S, Tiwari B. Carbene-Catalyzed Tandem [1,2]-Phospha-Brook/[1,4]-Phosphate Rearrangement: Access to α-Ketophosphates via Controlled Cross-Acyloin Condensation. J Org Chem 2018; 83:9478-9483. [DOI: 10.1021/acs.joc.8b01172] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Ram Subhawan Verma
- Division of Molecular Synthesis & Drug Discovery, Centre of Biomedical Research, SGPGIMS-Campus, Raebareli Road, Lucknow 226014, India
| | - Chandra Bhan Pandey
- Division of Molecular Synthesis & Drug Discovery, Centre of Biomedical Research, SGPGIMS-Campus, Raebareli Road, Lucknow 226014, India
| | - Shailesh Kumar
- Department of Applied Chemistry, Babasaheb Bhimrao Ambedkar University, Vidya Vihar, Raebareli Road, Lucknow 226025, India
| | - Bhoopendra Tiwari
- Division of Molecular Synthesis & Drug Discovery, Centre of Biomedical Research, SGPGIMS-Campus, Raebareli Road, Lucknow 226014, India
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24
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Sommer H, Marek I. Diastereo- and enantioselective copper catalyzed hydroallylation of disubstituted cyclopropenes. Chem Sci 2018; 9:6503-6508. [PMID: 30310580 PMCID: PMC6115688 DOI: 10.1039/c8sc02085j] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 06/29/2018] [Indexed: 12/18/2022] Open
Abstract
A highly diastereo- and enantioselective protocol for the hydroallylation of 1,1- and 1,2-disubstituted cyclopropenes has been developed utilizing an in situ formed copper hydride. A variety of allyl electrophiles could be utilized yielding a diverse range of trisubstituted cyclopropanes. Finally a preliminary enantioselective variant could be established employing a recently described P-stereogenic xantphos derivative as ligand.
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Affiliation(s)
- Heiko Sommer
- The Mallat Family Laboratory of Organic Chemistry , Schulich Faculty of Chemistry , Technion-Israel Institute of Technology , Haifa , 3200009 Israel .
| | - Ilan Marek
- The Mallat Family Laboratory of Organic Chemistry , Schulich Faculty of Chemistry , Technion-Israel Institute of Technology , Haifa , 3200009 Israel .
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25
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Singh S, Simaan M, Marek I. Pd-Catalyzed Selective Remote Ring Opening of Polysubstituted Cyclopropanols. Chemistry 2018; 24:8553-8557. [PMID: 29694690 DOI: 10.1002/chem.201802016] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Indexed: 12/14/2022]
Abstract
The distant functionalization of ω-ene cyclopropanols is induced by a Pd-catalyzed Heck reaction triggering a "metal-walk" and selective ring-opening of the three-membered ring. This approach provides a new class of acyclic aldehydes possessing concomitantly a stereodefined double bond and a quaternary carbon stereocenter α to the carbonyl group.
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Affiliation(s)
- Sukhdev Singh
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, 3200009, Israel
| | - Marwan Simaan
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, 3200009, Israel
| | - Ilan Marek
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa, 3200009, Israel
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26
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Maslivetc VA, Turner DN, McNair KN, Frolova L, Rogelj S, Maslivetc AA, Aksenov NA, Rubina M, Rubin M. Desymmetrization of Cyclopropenes via the Potassium-Templated Diastereoselective 7- exo- trig Cycloaddition of Tethered Amino Alcohols toward Enantiopure Cyclopropane-Fused Oxazepanones with Antimycobacterial Activity. J Org Chem 2018; 83:5650-5664. [PMID: 29696970 DOI: 10.1021/acs.joc.8b00640] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A strain-release-driven, cation-templated intramolecular nucleophilic addition of tethered alkoxides to prochiral cyclopropenes is described. Employment of chiral β- and γ-amino alkoxides allowed for highly diastereoselective assembly of a small series of enantiopure cyclopropane-fused oxazepanones. It was shown that the chiral center at C-4 plays a crucial role in controlling desymmetrization of the cyclopropenyl moiety, instigated by a profound potassium-templated effect. The preliminary biological activities of the new cyclopropane-fused medium heterocycles against Gram-positive bacteria, Gram-negative bacteria, mycobacteria, cancer cells, and fungus were evaluated.
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Affiliation(s)
- Vladimir A Maslivetc
- Department of Chemistry , University of Kansas , 1251 Wescoe Hall Drive , Lawrence , Kansas 66045-7582 , United States
| | - Danielle N Turner
- Departments of Chemistry and Biology , New Mexico Institute of Mining and Technology , Socorro , New Mexico 87801 , United States
| | - Kimberly N McNair
- Departments of Chemistry and Biology , New Mexico Institute of Mining and Technology , Socorro , New Mexico 87801 , United States
| | - Liliya Frolova
- Departments of Chemistry and Biology , New Mexico Institute of Mining and Technology , Socorro , New Mexico 87801 , United States
| | - Snezna Rogelj
- Departments of Chemistry and Biology , New Mexico Institute of Mining and Technology , Socorro , New Mexico 87801 , United States
| | - Anna A Maslivetc
- Department of Chemistry , University of Kansas , 1251 Wescoe Hall Drive , Lawrence , Kansas 66045-7582 , United States
| | - Nicolai A Aksenov
- Department of Chemistry , North Caucasus Federal University , 1a Pushkin St. , Stavropol 355009 , Russian Federation
| | - Marina Rubina
- Department of Chemistry , University of Kansas , 1251 Wescoe Hall Drive , Lawrence , Kansas 66045-7582 , United States
| | - Michael Rubin
- Department of Chemistry , University of Kansas , 1251 Wescoe Hall Drive , Lawrence , Kansas 66045-7582 , United States.,Department of Chemistry , North Caucasus Federal University , 1a Pushkin St. , Stavropol 355009 , Russian Federation
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27
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Song T, Arseniyadis S, Cossy J. Highly Enantioselective, Base-Free Synthesis of α-Quaternary Succinimides through Catalytic Asymmetric Allylic Alkylation. Chemistry 2018; 24:8076-8080. [DOI: 10.1002/chem.201800920] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 03/27/2018] [Indexed: 12/17/2022]
Affiliation(s)
- Tao Song
- 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
| | - Stellios Arseniyadis
- 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
- Queen Mary University of London; School of Biological and Chemical Sciences; Mile End Road London E1 4NS UK
| | - 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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28
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Bruffaerts J, Vasseur A, Singh S, Masarwa A, Didier D, Oskar L, Perrin L, Eisenstein O, Marek I. Zirconocene-Mediated Selective C-C Bond Cleavage of Strained Carbocycles: Scope and Mechanism. J Org Chem 2018. [PMID: 29537856 DOI: 10.1021/acs.joc.7b03115] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Several approaches using organozirconocene species for the remote cleavage of strained three-membered ring carbocycles are described. ω-Ene polysubstituted cyclopropanes, alkylidenecyclopropanes, ω-ene spiro[2.2]pentanes, and ω-ene cyclopropyl methyl ethers were successfully transformed into stereodefined organometallic intermediates, allowing an easy access to highly stereoenriched acyclic scaffolds in good yields and, in most cases, excellent selectivities. DFT calculations and isotopic labeling experiments were performed to delineate the origin of the obtained chemo- and stereoselectivities, demonstrating the importance of microreversibility.
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Affiliation(s)
- Jeffrey Bruffaerts
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry , Technion-Israel Institute of Technology , Haifa 3200009 , Israel
| | - Alexandre Vasseur
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry , Technion-Israel Institute of Technology , Haifa 3200009 , Israel
| | - Sukhdev Singh
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry , Technion-Israel Institute of Technology , Haifa 3200009 , Israel
| | - Ahmad Masarwa
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry , Technion-Israel Institute of Technology , Haifa 3200009 , Israel
| | - Dorian Didier
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry , Technion-Israel Institute of Technology , Haifa 3200009 , Israel
| | - Liron Oskar
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry , Technion-Israel Institute of Technology , Haifa 3200009 , Israel
| | - Lionel Perrin
- CPE Lyon, INSA Lyon, ICBMS, CNRS UMR 5246 , Université de Lyon, Université Claude Bernard Lyon 1 , Equipe ITEMM, Bât. Curien, 43 Bd. du 11 Novembre 1918 , 69622 Villeurbanne , France
| | - Odile Eisenstein
- Institut Charles Gerhardt, UMR 5253, CNRS-UM-ENSCM , Université de Montpellier , cc 1501, Place E. Bataillon , 34095 Montpellier , France
| | - Ilan Marek
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry , Technion-Israel Institute of Technology , Haifa 3200009 , Israel
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29
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Alkene-Zipper Catalyzed Selective and Remote Retro-ene Reaction of Alkenyl Cyclopropylcarbinol. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701481] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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30
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Maslivetc V, Barrett C, Aksenov NA, Rubina M, Rubin M. Intramolecular nucleophilic addition of carbanions generated from N-benzylamides to cyclopropenes. Org Biomol Chem 2018; 16:285-294. [PMID: 29242861 PMCID: PMC5755969 DOI: 10.1039/c7ob02068f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
An unusual reaction is described, involving a formal intramolecular nucleophilic substitution of bromocyclopropanes with nitrogen ylides generated in situ from N-benzyl carboxamides. It is shown that this reaction involves cyclopropene intermediates and allows for the facile and expeditious preparation of 3-azabicyclo[3.1.0]hexan-2-one scaffolds.
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Affiliation(s)
- Vladimir Maslivetc
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Dr., Lawrence, KS 66045-7582, USA.
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31
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Haas M, Leypold M, Schuh L, Fischer R, Torvisco A, Stueger H. Reactivity of Cyclic Silenolates Revisited. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00540] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Michael Haas
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Mario Leypold
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Lukas Schuh
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Roland Fischer
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Ana Torvisco
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Harald Stueger
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
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32
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Yamanushkin P, Lu-Diaz M, Edwards A, Aksenov NA, Rubina M, Rubin M. Directed nucleophilic addition of phenoxides to cyclopropenes. Org Biomol Chem 2017; 15:8153-8165. [PMID: 28920624 DOI: 10.1039/c7ob01785e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The alkali metal-templated addition of aryloxides across the double bond of non-conjugated cyclopropenes is described. High cis-selectivity is achieved through a directing effect of a strategically positioned carboxamide functionality.
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Affiliation(s)
- Pavel Yamanushkin
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Dr., Lawrence, KS 66045-7582, USA.
| | - Michael Lu-Diaz
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Dr., Lawrence, KS 66045-7582, USA. and Department of Chemistry, University of Puerto Rico at Mayaguez, Q-153, 259 Alfonso Valdez Blvd, Mayagüez, 00681, Puerto Rico
| | - Andrew Edwards
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Dr., Lawrence, KS 66045-7582, USA.
| | - Nicolai A Aksenov
- Department of Chemistry, North Caucasus Federal University, 1a Pushkin St., Stavropol 355009, Russian Federation
| | - Marina Rubina
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Dr., Lawrence, KS 66045-7582, USA. and Peoples' Friendship University of Russia, 6 Miklukho-Maklaya St., Moscow 117198, Russian Federation
| | - Michael Rubin
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Dr., Lawrence, KS 66045-7582, USA. and Department of Chemistry, North Caucasus Federal University, 1a Pushkin St., Stavropol 355009, Russian Federation
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33
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Starkov P, Moore JT, Duquette DC, Stoltz BM, Marek I. Enantioselective Construction of Acyclic Quaternary Carbon Stereocenters: Palladium-Catalyzed Decarboxylative Allylic Alkylation of Fully Substituted Amide Enolates. J Am Chem Soc 2017. [PMID: 28625056 DOI: 10.1021/jacs.7b04086] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We report a divergent and modular protocol for the preparation of acyclic molecular frameworks containing newly created quaternary carbon stereocenters. Central to this approach is a sequence composed of a (1) regioselective and -retentive preparation of allyloxycarbonyl-trapped fully substituted stereodefined amide enolates and of a (2) enantioselective palladium-catalyzed decarboxylative allylic alkylation reaction using a novel bisphosphine ligand.
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Affiliation(s)
- Pavel Starkov
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry, and The Lise Meitner-Minerva Center for Computational Quantum Chemistry, Technion-Israel Institute of Technology , Technion City, Haifa 32000, Israel
| | - Jared T Moore
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States
| | - Douglas C Duquette
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States
| | - Brian M Stoltz
- Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States
| | - Ilan Marek
- The Mallat Family Laboratory of Organic Chemistry, Schulich Faculty of Chemistry, and The Lise Meitner-Minerva Center for Computational Quantum Chemistry, Technion-Israel Institute of Technology , Technion City, Haifa 32000, Israel
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34
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Dange NS, Hussain Jatoi A, Robert F, Landais Y. Visible-Light-Mediated Addition of Phenacyl Bromides onto Cyclopropenes. Org Lett 2017; 19:3652-3655. [PMID: 28656767 DOI: 10.1021/acs.orglett.7b01651] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nitin S. Dange
- University of Bordeaux, Institute of Molecular Sciences, UMR-CNRS 5255, 351 Cours de la Libération, 33405 Talence, France
| | - Ashique Hussain Jatoi
- University of Bordeaux, Institute of Molecular Sciences, UMR-CNRS 5255, 351 Cours de la Libération, 33405 Talence, France
| | - Frédéric Robert
- University of Bordeaux, Institute of Molecular Sciences, UMR-CNRS 5255, 351 Cours de la Libération, 33405 Talence, France
| | - Yannick Landais
- University of Bordeaux, Institute of Molecular Sciences, UMR-CNRS 5255, 351 Cours de la Libération, 33405 Talence, France
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35
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Zhang FG, Marek I. Brook Rearrangement as Trigger for Carbene Generation: Synthesis of Stereodefined and Fully Substituted Cyclobutenes. J Am Chem Soc 2017; 139:8364-8370. [DOI: 10.1021/jacs.7b04255] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Fa-Guang Zhang
- The Mallat Family Laboratory of Organic
Chemistry, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Technion City, Haifa 32000, Israel
| | - Ilan Marek
- The Mallat Family Laboratory of Organic
Chemistry, Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Technion City, Haifa 32000, Israel
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36
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Dian L, Müller DS, Marek I. Asymmetric Copper-Catalyzed Carbomagnesiation of Cyclopropenes. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201701094] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Longyang Dian
- The Mallat Family Laboratory of Organic Chemistry; Schulich Faculty of Chemistry and the Lise Meitner-Minerva Center for Computational Quantum Chemistry; Technion-Israel Institute of Technology; Haifa 3200009 Israel
| | - Daniel S. Müller
- The Mallat Family Laboratory of Organic Chemistry; Schulich Faculty of Chemistry and the Lise Meitner-Minerva Center for Computational Quantum Chemistry; Technion-Israel Institute of Technology; Haifa 3200009 Israel
| | - Ilan Marek
- The Mallat Family Laboratory of Organic Chemistry; Schulich Faculty of Chemistry and the Lise Meitner-Minerva Center for Computational Quantum Chemistry; Technion-Israel Institute of Technology; Haifa 3200009 Israel
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37
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Dian L, Müller DS, Marek I. Asymmetric Copper-Catalyzed Carbomagnesiation of Cyclopropenes. Angew Chem Int Ed Engl 2017; 56:6783-6787. [DOI: 10.1002/anie.201701094] [Citation(s) in RCA: 88] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 03/21/2017] [Indexed: 12/29/2022]
Affiliation(s)
- Longyang Dian
- The Mallat Family Laboratory of Organic Chemistry; Schulich Faculty of Chemistry and the Lise Meitner-Minerva Center for Computational Quantum Chemistry; Technion-Israel Institute of Technology; Haifa 3200009 Israel
| | - Daniel S. Müller
- The Mallat Family Laboratory of Organic Chemistry; Schulich Faculty of Chemistry and the Lise Meitner-Minerva Center for Computational Quantum Chemistry; Technion-Israel Institute of Technology; Haifa 3200009 Israel
| | - Ilan Marek
- The Mallat Family Laboratory of Organic Chemistry; Schulich Faculty of Chemistry and the Lise Meitner-Minerva Center for Computational Quantum Chemistry; Technion-Israel Institute of Technology; Haifa 3200009 Israel
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38
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Huang HM, Bonilla P, Procter DJ. Selective construction of quaternary stereocentres in radical cyclisation cascades triggered by electron-transfer reduction of amide-type carbonyls. Org Biomol Chem 2017; 15:4159-4164. [DOI: 10.1039/c7ob00739f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Radical cyclisation cascades triggered by electron-transfer to amide-type carbonyls using SmI2–H2O–LiBr, result in the selective construction of quaternary carbon stereocentres.
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Affiliation(s)
| | - Pablo Bonilla
- School of Chemistry
- University of Manchester
- Manchester
- UK
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39
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Dange NS, Robert F, Landais Y. Free-Radical Carbocyanation of Cyclopropenes: Stereocontrolled Access to All-Carbon Quaternary Stereocenters in Acyclic Systems. Org Lett 2016; 18:6156-6159. [DOI: 10.1021/acs.orglett.6b03163] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nitin S. Dange
- University of Bordeaux, Institute of Molecular Sciences, UMR-CNRS 5255, 351 cours de la libération, 33405 Talence, France
| | - Frédéric Robert
- University of Bordeaux, Institute of Molecular Sciences, UMR-CNRS 5255, 351 cours de la libération, 33405 Talence, France
| | - Yannick Landais
- University of Bordeaux, Institute of Molecular Sciences, UMR-CNRS 5255, 351 cours de la libération, 33405 Talence, France
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