1
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Pramanik S, Samanta A, Maity S. A two carbon homologation of Friedel-Crafts alkylation enabled by photochemical alkene stitching: modular assembly of cyclolignans. Chem Commun (Camb) 2024; 60:5282-5285. [PMID: 38656305 DOI: 10.1039/d4cc00957f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Herein we report an efficient two-carbon homologated variant of Friedel-Crafts alkylation via photochemical radical alkene stitching. Readily available feedstock alkenes are used as bridges between photogenerated alkyl radicals and arenes, opening a route to γ-aryl-carbonyls for chemo-divergent access to aryltetralone and γ-lactones, a gateway to 2,7'-cyclolignans.
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Affiliation(s)
- Shyamal Pramanik
- Department of Chemistry and Chemical Biology, Indian Institute of Technology (ISM), Dhanbad, Jharkhand 826004, India.
| | - Apurba Samanta
- Department of Chemistry and Chemical Biology, Indian Institute of Technology (ISM), Dhanbad, Jharkhand 826004, India.
| | - Soumitra Maity
- Department of Chemistry and Chemical Biology, Indian Institute of Technology (ISM), Dhanbad, Jharkhand 826004, India.
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2
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Guin A, Bhattacharjee S, Harariya MS, Biju AT. Lewis acid-catalyzed diastereoselective carbofunctionalization of bicyclobutanes employing naphthols. Chem Sci 2023; 14:6585-6591. [PMID: 37350821 PMCID: PMC10284142 DOI: 10.1039/d3sc01373a] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 05/22/2023] [Indexed: 06/24/2023] Open
Abstract
Traditional radical-mediated ring-opening of bicyclo[1.1.0]butanes (BCBs) for cyclobutane synthesis suffers from poor diastereoselectivity. Although few reports on BCB ring-opening via polar mechanisms are available, the Lewis acid-catalyzed diastereoselective ring-opening of BCBs using carbon nucleophiles is still underdeveloped. Herein, we report a mild and diastereoselective Bi(OTf)3-catalyzed ring-opening of BCBs employing 2-naphthols. The anticipated carbofunctionalized trisubstituted cyclobutanes were obtained via a bicoordinated bismuth complex and the products are formed in good to excellent yields with high regio- and diastereoselectivity. The scope of the reaction was further extended using electron-rich phenols and naphthylamine. The functionalization of the synthesized trisubstituted cyclobutanes shows the synthetic utility of the present method.
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Affiliation(s)
- Avishek Guin
- Department of Organic Chemistry, Indian Institute of Science Bangalore 560012 India https://orgchem.iisc.ac.in/atbiju/
| | - Subrata Bhattacharjee
- Department of Organic Chemistry, Indian Institute of Science Bangalore 560012 India https://orgchem.iisc.ac.in/atbiju/
| | - Mahesh Singh Harariya
- Department of Organic Chemistry, Indian Institute of Science Bangalore 560012 India https://orgchem.iisc.ac.in/atbiju/
| | - Akkattu T Biju
- Department of Organic Chemistry, Indian Institute of Science Bangalore 560012 India https://orgchem.iisc.ac.in/atbiju/
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3
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Deswal S, Guin A, Biju AT. Benzotriazole-Triggered Three-Component Lewis Acid-Catalyzed Ring-Opening 1,3-Aminofunctionalization of Donor-Acceptor Cyclopropanes. Org Lett 2023; 25:1643-1648. [PMID: 36876870 DOI: 10.1021/acs.orglett.3c00180] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
Abstract
The use of benzotriazoles as nucleophilic triggers in the three-component Yb(OTf)3-catalyzed ring-opening 1,3-aminofunctionalization of donor-acceptor (D-A) cyclopropanes is presented. Using N-halo succinimide (NXS) as the third component, the reaction afforded the 1,3-aminohalogenation product in up to an 84% yield. Moreover, using alkyl halides or Michael acceptors as the third components, the 3,1-carboaminated products are formed in up to a 96% yield in a one-pot operation. Employing Selectfluor as the electrophile, the reaction furnished the 1,3-aminofluorinated product in a 61% yield.
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Affiliation(s)
- Shiksha Deswal
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, Karnataka 560012, India
| | - Avishek Guin
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, Karnataka 560012, India
| | - Akkattu T Biju
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, Karnataka 560012, India
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4
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Hazra A, Kanji T, Banerjee P. Merging Two Strained Carbocycles: Lewis Acid Catalyzed Remote Site-Selective Friedel-Crafts Alkylation of in Situ Generated β-Naphthol. J Org Chem 2023; 88:960-971. [PMID: 36578165 DOI: 10.1021/acs.joc.2c02378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Lewis acid catalyzed tandem activation of the two smallest carbocycles, 3-ethoxy cyclobutanones, and donor-acceptor cyclopropanes has been demonstrated. The diphenyl-substituted 3-ethoxy cyclobutanone rearranges itself by intramolecular cyclization for the in situ generation of 1-phenyl 2-naphthol, which further undergoes remote site-selective Friedel-Crafts alkylation with donor-acceptor cyclopropane to synthesize a series of γ-naphthyl butyric acid derivatives. Further control experiments for mechanistic investigations and synthetic applications have also been carried out.
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Affiliation(s)
- Arijit Hazra
- Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India
| | - Tanmay Kanji
- Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India
| | - Prabal Banerjee
- Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India
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5
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Ahlburg NL, Hergert O, Jones PG, Werz DB. Donor-Acceptor Cyclopropanes: Activation Enabled by a Single, Vinylogous Acceptor. Angew Chem Int Ed Engl 2023; 62:e202214390. [PMID: 36322458 PMCID: PMC10099577 DOI: 10.1002/anie.202214390] [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: 09/29/2022] [Indexed: 11/05/2022]
Abstract
A novel class of highly activated donor-acceptor cyclopropanes bearing only a single, vinylogous acceptor is presented. These strained moieties readily undergo cycloadditions with aldehydes, ketones, thioketones, nitriles, naphth-2-ols and various other substrates to yield the corresponding carbo- and heterocycles. Diastereocontrol can be achieved through the choice of catalyst (Brønsted or Lewis acid). The formation of tetrahydrofurans was shown to be highly enantiospecific when chiral cyclopropanes are employed. A series of mechanistic and kinetic experiments was conducted to elucidate a plausible catalytic cycle and to rationalize the stereochemical outcome.
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Affiliation(s)
- Nils L. Ahlburg
- Technische Universität BraunschweigInstitute of Organic ChemistryHagenring 3038106BraunschweigGermany
| | - Oliver Hergert
- Technische Universität BraunschweigInstitute of Organic ChemistryHagenring 3038106BraunschweigGermany
| | - Peter G. Jones
- Technische Universität BraunschweigInstitute of Inorganic and Analytical ChemistryHagenring 3038106BraunschweigGermany
| | - Daniel B. Werz
- Albert-Ludwigs-Universität FreiburgInstitute of Organic ChemistryAlbertstraße 2179104Freiburg (Breisgau)Germany
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6
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Liu J, Chen J, Liu T, Liu J, Zeng Y. Recent Advances in the Reactions of β-Naphthol at α-Position. CHINESE J ORG CHEM 2023. [DOI: 10.6023/cjoc202207015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
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7
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Ahlburg NL, Hergert O, Jones PG, Werz DB. Donor‐Acceptor Cyclopropanes: Activation Enabled by a Single, Vinylogous Acceptor. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202214390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Affiliation(s)
- Nils L. Ahlburg
- Technische Universität Braunschweig Institute of Organic Chemistry Hagenring 30 38106 Braunschweig Germany
| | - Oliver Hergert
- Technische Universität Braunschweig Institute of Organic Chemistry Hagenring 30 38106 Braunschweig Germany
| | - Peter G. Jones
- Technische Universität Braunschweig Institute of Inorganic and Analytical Chemistry Hagenring 30 38106 Braunschweig Germany
| | - Daniel B. Werz
- Albert-Ludwigs-Universität Freiburg Institute of Organic Chemistry Albertstraße 21 79104 Freiburg (Breisgau) Germany
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8
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Vartanova AE, Levina II, Ratmanova NK, Andreev IA, Ivanova OA, Trushkov IV. Ambident reactivity of 5-aminopyrazoles towards donor-acceptor cyclopropanes. Org Biomol Chem 2022; 20:7795-7802. [PMID: 36148530 DOI: 10.1039/d2ob01490d] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Lewis acid-catalysed reactions of donor-acceptor cyclopropanes with 1,3-disubstituted 5-aminopyrazoles were investigated. Under catalysis with gallium(III) chloride, products of the three-membered ring opening via a nucleophilic attack of the exocyclic amino group were obtained in a chemoselective manner. Oppositely, in the presence of scandium(III) triflate, products of either N-alkylation or C(4)-alkylation, or a mixture of both were formed. The products of the C(4) alkylation were transformed in one step into tetrahydropyrazolo[3,4-b]azepines that are attractive for medicinal chemistry and pharmacology.
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Affiliation(s)
- Anna E Vartanova
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Leninsky pr. 47, Moscow 119334, Russian Federation.
| | - Irina I Levina
- N. M. Emanuel Institute of Biochemical Physics Russian Academy of Sciences, Kosygina 4, Moscow 119334, Russian Federation
| | - Nina K Ratmanova
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Leninsky pr. 47, Moscow 119334, Russian Federation. .,Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and Immunology, Samory Mashela 1, Moscow 117997, Russian Federation
| | - Ivan A Andreev
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Leninsky pr. 47, Moscow 119334, Russian Federation. .,Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and Immunology, Samory Mashela 1, Moscow 117997, Russian Federation
| | - Olga A Ivanova
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Leninsky pr. 47, Moscow 119334, Russian Federation. .,Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1-3, Moscow, 119991, Russian Federation
| | - Igor V Trushkov
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Leninsky pr. 47, Moscow 119334, Russian Federation.
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9
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Tang P, Wei YY, Wen L, Ma HJ, Yang Y, Jiang Y. MgI 2-Catalyzed Nucleophilic Ring-Opening Reactions of Donor-Acceptor Cyclopropanes with Indoline-2-thiones. J Org Chem 2022; 87:10890-10901. [PMID: 35918174 DOI: 10.1021/acs.joc.2c01179] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
MgI2-catalyzed nucleophilic ring-opening reactions of donor-acceptor cyclopropanes with indoline-2-thiones as easy-to-handle sulfur nucleophiles were investigated. A series of functionalized γ-indolylthio butyric acid derivatives were synthesized in good to excellent yields under mild reaction conditions. Furthermore, the thioether functionalized ring-opening products could be transformed to sulfone and methionine analogues.
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Affiliation(s)
- Pan Tang
- School of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Zigong 643000, China
| | - You-Yuan Wei
- School of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Zigong 643000, China
| | - Long Wen
- School of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Zigong 643000, China
| | - Hao-Jie Ma
- School of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Zigong 643000, China
| | - Yi Yang
- School of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Zigong 643000, China
| | - Yan Jiang
- School of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Zigong 643000, China
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10
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Jacob A, Barkawitz P, Jones PG, Werz DB. Insertion of S 2 into Donor-Acceptor Cyclopropanes: Access to Dithiolanes and Their Conversion to Thietane Dioxides. Org Lett 2022; 24:3028-3032. [PMID: 35442042 DOI: 10.1021/acs.orglett.2c00967] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A facile and efficient route to dithiolanes starting from donor-acceptor cyclopropanes is reported. Potassium p-toluenethiosulfonate has been established as the reagent of choice for this formal insertion of the disulfide moiety. Using this methodology, dithiolanes have been synthesized in moderate to good yields with high functional group tolerance. Upon treatment with an excess of mCPBA, the corresponding dithiolanes delivered four-membered thietane dioxides, the formal (3+1)-cycloaddition product of D-A cyclopropanes, and sulfur dioxide.
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11
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Guin A, Deswal S, Biju AT. Ring-Opening 1,3-Carbothiolation of Donor-Acceptor Cyclopropanes Using Alkyl Halides and In Situ Generated Dithiocarbamates. J Org Chem 2022; 87:6504-6513. [PMID: 35412311 DOI: 10.1021/acs.joc.2c00447] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Two-step, ring-opening 1,3-carbothiolation of donor-acceptor (D-A) cyclopropanes employing alkyl halides and in situ generated dithiocarbamates (from amines and CS2) has been demonstrated under mild conditions. The reaction is operationally simple and works with good functional group compatibility. Three new bonds including C-N, C-S, and C-C are formed in this 1,3-bifunctionalization strategy. Electron-poor olefins can also be used as electrophiles instead of alkyl halides. The use of enantiomerically pure D-A cyclopropane afforded enantiopure 1,3-carbothiolated product, thus demonstrating the stereospecificity of the reaction.
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Affiliation(s)
- Avishek Guin
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Shiksha Deswal
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Akkattu T Biju
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India
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12
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Wang J, Xie J, Lee WCC, Wang DS, Zhang XP. Radical differentiation of two ester groups in unsymmetrical diazomalonates for highly asymmetric olefin cyclopropanation. CHEM CATALYSIS 2022; 2:330-344. [PMID: 35494099 PMCID: PMC9049825 DOI: 10.1016/j.checat.2021.11.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Diazomalonates have been demonstrated as effective metalloradicophiles for asymmetric radical olefin cyclopropanation via Co(II)-metalloradical catalysis (MRC). Supported by D 2-symmetric chiral amidoporphyrin ligand, Co(II)-based metalloradical system can efficiently activate unsymmetrical methyl phenyl diazomalonate (MPDM) with effective differentiation of the two ester groups for asymmetric cyclopropanation, enabling stereoselective construction of 1,1-cyclopropanediesters bearing two contiguous chiral centers, including all-carbon quaternary stereogenic center. The Co(II)-catalyzed asymmetric cyclopropanation, which operates at room temperature without slow addition of the diazo compound, is generally applicable to broad-ranging olefins and tolerates various functionalities, providing a streamlined synthesis of chiral 1,1-cyclopropanediesters in high yields with both high diastereoselectivity and enantioselectivity. Combined computational and experimental studies support the underlying stepwise radical mechanism for Co(II)-catalyzed cyclopropanation. In addition to functioning as 1,3-dipoles for forming five-membered structures, enantioenriched (E)-1,1-cyclopropanediesters serve as useful building blocks for stereoselective synthesis of different cyclopropane derivatives. In addition, the enantioenriched (E)-1,1-cyclopropanediesters can be stereoselectively converted to (Z)-diastereomers.
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Affiliation(s)
- Jingyi Wang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA 02467, USA
| | - Jingjing Xie
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA 02467, USA
| | - Wan-Chen Cindy Lee
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA 02467, USA
| | - Duo-Sheng Wang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA 02467, USA
| | - X. Peter Zhang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA 02467, USA
- Lead contact
- Correspondence:
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13
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Magre M, Cornella J. Redox-Neutral Organometallic Elementary Steps at Bismuth: Catalytic Synthesis of Aryl Sulfonyl Fluorides. J Am Chem Soc 2021; 143:21497-21502. [PMID: 34914387 PMCID: PMC8719321 DOI: 10.1021/jacs.1c11463] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A Bi-catalyzed synthesis of sulfonyl fluorides from the corresponding (hetero)aryl boronic acids is presented. We demonstrate that the organobismuth(III) catalysts bearing a bis-aryl sulfone ligand backbone revolve through different canonical organometallic steps within the catalytic cycle without modifying the oxidation state. All steps have been validated, including the catalytic insertion of SO2 into Bi-C bonds, leading to a structurally unique O-bound bismuth sulfinate complex. The catalytic protocol affords excellent yields for a wide range of aryl and heteroaryl boronic acids, displaying a wide functional group tolerance.
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Affiliation(s)
- Marc Magre
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr, 45470, Germany
| | - Josep Cornella
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr, 45470, Germany
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14
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Mlostoń G, Kowalczyk M, Augustin AU, Jones PG, Werz DB. Lewis‐Acid‐Catalyzed (3+2)‐Cycloadditions of Donor‐Acceptor Cyclopropanes with Thioketenes. European J Org Chem 2021; 2021:6250-6253. [PMID: 35875264 PMCID: PMC9290834 DOI: 10.1002/ejoc.202100879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 07/28/2021] [Indexed: 11/06/2022]
Affiliation(s)
- Grzegorz Mlostoń
- University of Łodź Department of Organic & Applied Chemistry Tamka 12 91-403 Łodź Poland
| | - Mateusz Kowalczyk
- University of Łodź Department of Organic & Applied Chemistry Tamka 12 91-403 Łodź Poland
| | - André U. Augustin
- Technische Universität Braunschweig Institute of Organic Chemistry Hagenring 30 38106 Braunschweig Germany
| | - Peter G. Jones
- Technische Universität Braunschweig Institute of Inorganic and Analytical Chemistry Hagenring 30 38106 Braunschweig Germany
| | - Daniel B. Werz
- Technische Universität Braunschweig Institute of Organic Chemistry Hagenring 30 38106 Braunschweig Germany
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15
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Oliver GA, Loch MN, Augustin AU, Steinbach P, Sharique M, Tambar UK, Jones PG, Bannwarth C, Werz DB. Cycloadditions of Donor–Acceptor Cyclopropanes and ‐butanes using S=N‐Containing Reagents: Access to Cyclic Sulfinamides, Sulfonamides, and Sulfinamidines. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202106596] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Gwyndaf A. Oliver
- Technische Universität Braunschweig Institute of Organic Chemistry Hagenring 30 38106 Braunschweig Germany
| | - Maximilian N. Loch
- Technische Universität Braunschweig Institute of Organic Chemistry Hagenring 30 38106 Braunschweig Germany
| | - André U. Augustin
- Technische Universität Braunschweig Institute of Organic Chemistry Hagenring 30 38106 Braunschweig Germany
| | - Pit Steinbach
- Institute of Physical Chemistry RWTH Aachen University Melatener Str. 20 52056 Aachen Germany
| | - Mohammed Sharique
- Department of Biochemistry The University of Texas Southwestern Medical Center 5323 Harry Hines Boulevard Dallas TX 75390-9038 USA
| | - Uttam K. Tambar
- Department of Biochemistry The University of Texas Southwestern Medical Center 5323 Harry Hines Boulevard Dallas TX 75390-9038 USA
| | - Peter G. Jones
- Technische Universität Braunschweig Institute of Inorganic and Analytical Chemistry Hagenring 30 38106 Braunschweig Germany
| | - Christoph Bannwarth
- Institute of Physical Chemistry RWTH Aachen University Melatener Str. 20 52056 Aachen Germany
| | - Daniel B. Werz
- Technische Universität Braunschweig Institute of Organic Chemistry Hagenring 30 38106 Braunschweig Germany
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16
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Saha D, Maajid Taily I, Banerjee P. Electricity Driven 1,3‐Oxohydroxylation of Donor‐Acceptor Cyclopropanes: a Mild and Straightforward Access to β‐Hydroxy Ketones. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101022] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Debarshi Saha
- Department of Chemistry Indian Institute of Technology Ropar Rupnagar Punjab 140001
| | - Irshad Maajid Taily
- Department of Chemistry Indian Institute of Technology Ropar Rupnagar Punjab 140001
| | - Prabal Banerjee
- Department of Chemistry Indian Institute of Technology Ropar Rupnagar Punjab 140001
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17
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Oliver GA, Loch MN, Augustin AU, Steinbach P, Sharique M, Tambar UK, Jones PG, Bannwarth C, Werz DB. Cycloadditions of Donor-Acceptor Cyclopropanes and -butanes using S=N-Containing Reagents: Access to Cyclic Sulfinamides, Sulfonamides, and Sulfinamidines. Angew Chem Int Ed Engl 2021; 60:25825-25831. [PMID: 34499800 PMCID: PMC9298015 DOI: 10.1002/anie.202106596] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 09/08/2021] [Indexed: 11/09/2022]
Abstract
We present (3+2)‐ and (4+2)‐cycloadditions of donor–acceptor (D–A) cyclopropanes and cyclobutanes with N‐sulfinylamines and a sulfur diimide, along with a one‐pot, two‐step strategy for the formal insertion of HNSO2 into D–A cyclopropanes. These are rare examples of cycloadditions with D–A cyclopropanes and cyclobutanes whereby the 2π component consists of two different heteroatoms, thus leading to five‐ and six‐membered rings containing adjacent heteroatoms.
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Affiliation(s)
- Gwyndaf A Oliver
- Technische Universität Braunschweig, Institute of Organic Chemistry, Hagenring 30, 38106, Braunschweig, Germany
| | - Maximilian N Loch
- Technische Universität Braunschweig, Institute of Organic Chemistry, Hagenring 30, 38106, Braunschweig, Germany
| | - André U Augustin
- Technische Universität Braunschweig, Institute of Organic Chemistry, Hagenring 30, 38106, Braunschweig, Germany
| | - Pit Steinbach
- Institute of Physical Chemistry, RWTH Aachen University, Melatener Str. 20, 52056, Aachen, Germany
| | - Mohammed Sharique
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390-9038, USA
| | - Uttam K Tambar
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390-9038, USA
| | - Peter G Jones
- Technische Universität Braunschweig, Institute of Inorganic and Analytical Chemistry, Hagenring 30, 38106, Braunschweig, Germany
| | - Christoph Bannwarth
- Institute of Physical Chemistry, RWTH Aachen University, Melatener Str. 20, 52056, Aachen, Germany
| | - Daniel B Werz
- Technische Universität Braunschweig, Institute of Organic Chemistry, Hagenring 30, 38106, Braunschweig, Germany
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18
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Zhao H, Shen P, Sun D, Zhai H, Zhao Y. Transition-Metal-Free [3+2] Dehydration Cycloaddition of Donor-Acceptor Cyclopropanes With 2-Naphthols. Front Chem 2021; 9:711257. [PMID: 34336794 PMCID: PMC8322234 DOI: 10.3389/fchem.2021.711257] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 06/04/2021] [Indexed: 11/21/2022] Open
Abstract
A Brønsted acid-catalyzed domino ring-opening cyclization transformation of donor-acceptor (D-A) cyclopropanes and 2-naphthols has been developed. This formal [3+2] cyclization reaction provided novel and efficient access to the naphthalene-fused cyclopentanes in the absence of any transition-metal catalysts or additives. This robust procedure was completed smoothly on a gram-scale to afford the corresponding product with comparable efficiency. Furthermore, the synthetic application of the prepared product has been demonstrated by its transformation into a variety of synthetically useful molecules.
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Affiliation(s)
- Hua Zhao
- Institute of Drug Discovery Technology, Ningbo University, Ningbo, China
| | - Peng Shen
- Institute of Drug Discovery Technology, Ningbo University, Ningbo, China
| | - Dongru Sun
- Institute of Drug Discovery Technology, Ningbo University, Ningbo, China
| | - Hongbin Zhai
- State Key Laboratory of Chemical Oncogenomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen, China
| | - Yufen Zhao
- Institute of Drug Discovery Technology, Ningbo University, Ningbo, China
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19
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Kolb S, Ahlburg NL, Werz DB. Friedel-Crafts-Type Reactions with Electrochemically Generated Electrophiles from Donor-Acceptor Cyclopropanes and -Butanes. Org Lett 2021; 23:5549-5553. [PMID: 34231368 DOI: 10.1021/acs.orglett.1c01890] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We describe a general electrochemical method to functionalize donor-acceptor (D-A) cyclopropanes and -butanes with arenes utilizing Friedel-Crafts-type reactivity. The catalyst-free strategy relies on the direct anodic oxidation of the strained carbocycles, which leads after C(sp3)-C(sp3) cleavage to radical cations that act as electrophiles for the arylation reaction. Broad reaction scopes in regard to cyclopropanes, cyclobutanes, and aromatic reaction partners are presented. Additionally, a plausible electrolysis mechanism is proposed.
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Affiliation(s)
- Simon Kolb
- Technische Universität Braunschweig, Institute of Organic Chemistry, Hagenring 30, 38106 Braunschweig, Germany
| | - Nils L Ahlburg
- Technische Universität Braunschweig, Institute of Organic Chemistry, Hagenring 30, 38106 Braunschweig, Germany
| | - Daniel B Werz
- Technische Universität Braunschweig, Institute of Organic Chemistry, Hagenring 30, 38106 Braunschweig, Germany
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20
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Kolb S, Petzold M, Brandt F, Jones PG, Jacob CR, Werz DB. Electrocatalytic Activation of Donor-Acceptor Cyclopropanes and Cyclobutanes: An Alternative C(sp 3 )-C(sp 3 ) Cleavage Mode. Angew Chem Int Ed Engl 2021; 60:15928-15934. [PMID: 33890714 PMCID: PMC8362004 DOI: 10.1002/anie.202101477] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 04/21/2021] [Indexed: 12/03/2022]
Abstract
We describe the first electrochemical activation of D-A cyclopropanes and D-A cyclobutanes leading after C(sp3 )-C(sp3 ) cleavage to the formation of highly reactive radical cations. This concept is utilized to formally insert molecular oxygen after direct or DDQ-assisted anodic oxidation of the strained carbocycles, delivering β- and γ-hydroxy ketones and 1,2-dioxanes electrocatalytically. Furthermore, insights into the mechanism of the oxidative process, obtained experimentally and by additional quantum-chemical calculations are presented. The synthetic potential of the reaction products is demonstrated by diverse derivatizations.
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Affiliation(s)
- Simon Kolb
- Technische Universität BraunschweigInstitute of Organic ChemistryHagenring 3038106BraunschweigGermany
| | - Martin Petzold
- Technische Universität BraunschweigInstitute of Organic ChemistryHagenring 3038106BraunschweigGermany
| | - Felix Brandt
- Technische Universität BraunschweigInstitute of Physical and Theoretical ChemistryGaußstraße 1738106BraunschweigGermany
| | - Peter G. Jones
- Technische Universität BraunschweigInstitute of Inorganic and Analytical ChemistryHagenring 3038106BraunschweigGermany
| | - Christoph R. Jacob
- Technische Universität BraunschweigInstitute of Physical and Theoretical ChemistryGaußstraße 1738106BraunschweigGermany
| | - Daniel B. Werz
- Technische Universität BraunschweigInstitute of Organic ChemistryHagenring 3038106BraunschweigGermany
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21
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Kolb S, Petzold M, Brandt F, Jones PG, Jacob CR, Werz DB. Electrocatalytic Activation of Donor–Acceptor Cyclopropanes and Cyclobutanes: An Alternative C(sp
3
)−C(sp
3
) Cleavage Mode. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101477] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Simon Kolb
- Technische Universität Braunschweig Institute of Organic Chemistry Hagenring 30 38106 Braunschweig Germany
| | - Martin Petzold
- Technische Universität Braunschweig Institute of Organic Chemistry Hagenring 30 38106 Braunschweig Germany
| | - Felix Brandt
- Technische Universität Braunschweig Institute of Physical and Theoretical Chemistry Gaußstraße 17 38106 Braunschweig Germany
| | - Peter G. Jones
- Technische Universität Braunschweig Institute of Inorganic and Analytical Chemistry Hagenring 30 38106 Braunschweig Germany
| | - Christoph R. Jacob
- Technische Universität Braunschweig Institute of Physical and Theoretical Chemistry Gaußstraße 17 38106 Braunschweig Germany
| | - Daniel B. Werz
- Technische Universität Braunschweig Institute of Organic Chemistry Hagenring 30 38106 Braunschweig Germany
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22
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Zhang Y, Xin J, Wang C. Stereoselective Synthesis of 4,5‐Dihydroisoxazole Derivatives from 1,1‐Dicyanocyclopropanes and Hydroxylamine Hydrochloride. Helv Chim Acta 2021. [DOI: 10.1002/hlca.202100032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yue Zhang
- School of Chemistry and Chemical Engineering Yangzhou University 180 Siwangting Street Yangzhou 225002 P. R. China
| | - Junhu Xin
- School of Chemistry and Chemical Engineering Yangzhou University 180 Siwangting Street Yangzhou 225002 P. R. China
| | - Cunde Wang
- School of Chemistry and Chemical Engineering Yangzhou University 180 Siwangting Street Yangzhou 225002 P. R. China
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23
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Kumar A, Jamali MF, Thomas S, Ahamad S, Kant R, Mohanan K. Additive‐Free Synthesis of Trifluoromethylated Spiro Cyclopropanes and Their Transformation into Trifluoromethylated Building Blocks. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100207] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Anuj Kumar
- Medicinal & Process Chemistry Division CSIR-Central Drug Research Institute Lucknow 226031 India
| | - Muhammad Fahad Jamali
- Medicinal & Process Chemistry Division CSIR-Central Drug Research Institute Lucknow 226031 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Shilpa Thomas
- Medicinal & Process Chemistry Division CSIR-Central Drug Research Institute Lucknow 226031 India
| | - Shakir Ahamad
- Medicinal & Process Chemistry Division CSIR-Central Drug Research Institute Lucknow 226031 India
- Department of Chemistry Aligarh Muslim University Aligarh 202002, UP India
| | - Ruchir Kant
- Molecular and Structural Biology Division CSIR-Central Drug Research Institute Lucknow 226031 India
| | - Kishor Mohanan
- Medicinal & Process Chemistry Division CSIR-Central Drug Research Institute Lucknow 226031 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
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24
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Piperidine‐Mediated [3+2] Cyclization of Donor‐Acceptor Cyclopropanes and β‐Nitrostyrenes: Access to Polysubsituted Cyclopentenes with High Diastereoselectivity. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100149] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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25
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Ghosh K, Das S. Recent advances in ring-opening of donor acceptor cyclopropanes using C-nucleophiles. Org Biomol Chem 2021; 19:965-982. [PMID: 33471020 DOI: 10.1039/d0ob02437f] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Ring-opening transformations of donor-acceptor cyclopropanes (DAC) with carbon-centered nucleophiles is a simple, straight-forward approach to 1,3-bifunctional compounds that has witnessed remarkable progress over the past several years. To date, different reactivity patterns of DACs have been successfully exploited in racemic/stereoselective syntheses of various acyclic compounds or carbocycles with an impressive structural diversity. The thriving strategies have been successfully utilized in multistep synthesis of complex target molecules. Herein, the recent advances (2015-present) in the ring-opening of DAC involving electron rich arenes and indoles, active methylene compounds, various dipolarophiles, organoborates/boronates, vinyl ethers etc. following Friedel-Crafts alkylation, annulation/formal cycloaddition reaction, organocatalytic reaction, Nazarov cyclisation etc. are presented.
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Affiliation(s)
- Koena Ghosh
- Department of Chemistry, Presidency University, 86/1 College Street, Kolkata 700 073, India.
| | - Subhomoy Das
- Department of Chemistry, Bar Ilan University, Ramat Gan 5290002, Israel
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26
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Augustin AU, Werz DB. Exploiting Heavier Organochalcogen Compounds in Donor-Acceptor Cyclopropane Chemistry. Acc Chem Res 2021; 54:1528-1541. [PMID: 33661599 DOI: 10.1021/acs.accounts.1c00023] [Citation(s) in RCA: 69] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Donor-acceptor (D-A) cyclopropanes have gained increased momentum over the past two decades. The use of these highly strained three-membered entities paved the way to innovative and original transformations yielding complex cyclic and acyclic architectures that otherwise might be difficult to address. Since the fundamentals were laid by Wenkert and Reissig in the late 1970s, the field has flourished impressively including asymmetric transformations as well as elegant synthetic applications in the construction of natural occurring products. In this Account, we aim to highlight especially our efforts in the context of an efficient access to sulfur- and selenium-containing compounds, of either cyclic or open-chain nature, by exploiting D-A cyclopropane chemistry. Light will be shed on the three fundamental transformations: ring-opening reactions, cycloadditions, and rearrangements.Our synthetic endeavors started back in 2011 guided by quantum chemical studies to obtain 3,3'-linked bisthiophenes along with an unprecedented rearrangement delivering sulfur- and selenium-containing cagelike scaffolds. Inspired by these surprising results, we further deepened our efforts to the construction of new sulfur-carbon and selenium-carbon bonds within the context of D-A cyclopropane chemistry. In the first instance, we capitalized on the great versatility of organosulfur and organoselenium compounds regarding their amphiphilic character to act either as nucleophilic or as electrophilic species. By such an approach, ring-openings via a nucleophilic attack of sulfenyl and selenyl halides furnished 1,3-bishalochalcogenated products. A similar protocol led us to a desymmetrization reaction of meso-cyclopropyl carbaldehydes employing novel chiral imidazolidinone organocatalysts. In contrast, electrophilic sulfur was supplied by N-(arylthio)succinimide substrates to access thiolated γ-amino acid derivatives and their selenium equivalents.Combining the highly reactive thiocarbonyl compounds and vicinal donor-acceptor substituted cyclopropanes opened new vistas in the field of atom-economic cycloaddition reactions to build up sulfur-containing heterocycles of various sizes. The first systematic study of such transformations was made by our group in 2017 leading to highly decorated thiolanes, whereas an intramolecular approach furnished thia-[n.2.1]bicyclic ring systems. Our investigations were then successfully extended to the synthesis of tetrahydroselenophenes by using capricious selenoketones. Recently, we were able to yield the unsaturated analogues, selenophenes, by a (3 + 2)-cycloaddition of D-A cyclopropanes with ammonium selenocyanates followed by oxidation. The formal insertion of thioketenes was realized by employing 3-thioxocyclobutanones as surrogates for disubstituted thioketenes to obtain 2-substituted tetrahydrothiophenes bearing a semicyclic double bond via a (3 + 2) spiroannulation/(2 + 2) cycloreversion sequence. Even the formation of seven-membered S-heterocycles was realized by (4 + 3)-cycloaddition processes. In 2016, we demonstrated the synthesis of benzo-fused dithiepines from in situ generated ortho-bisthioquinones, whereas the utilization of thia-Michael systems as a hetero-4π-component delivered tetrahydrothiepine derivatives containing just one sulfur atom embedded in the ring system.
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Affiliation(s)
- André U. Augustin
- Institute of Organic Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Daniel B. Werz
- Institute of Organic Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
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27
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Babaahmadi R, Jalali M, Smith JA, Yates BF, Ariafard A. How a Bismuth(III) Catalyst Achieves Greatest Activation of Organic Lewis Bases in a Catalytic Reaction: Insights from DFT Calculations. ChemCatChem 2020. [DOI: 10.1002/cctc.202001688] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Rasool Babaahmadi
- School of Natural Sciences (Chemistry) University of Tasmania Private Bag 75 Hobart TAS 7001 Australia
| | - Mona Jalali
- School of Natural Sciences (Chemistry) University of Tasmania Private Bag 75 Hobart TAS 7001 Australia
| | - Jason A. Smith
- School of Natural Sciences (Chemistry) University of Tasmania Private Bag 75 Hobart TAS 7001 Australia
| | - Brian F. Yates
- School of Natural Sciences (Chemistry) University of Tasmania Private Bag 75 Hobart TAS 7001 Australia
| | - Alireza Ariafard
- School of Natural Sciences (Chemistry) University of Tasmania Private Bag 75 Hobart TAS 7001 Australia
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28
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Zhang D, Cai H, Chen Y, Yin L, Zhong J, Zhang Y, Zhang QF. Ring Opening of Donor-Acceptor Cyclopropanes with Acyclic 1,3-Diketones for the Synthesis of 1,6-Dicarbonyl Compounds. J Org Chem 2020; 85:14262-14270. [PMID: 33115228 DOI: 10.1021/acs.joc.0c02290] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
1,6-Dicarbonyl compounds, representing the formal addition products of the α-position of acetophenone derivatives to donor-acceptor cyclopropanes, were synthesized in two steps via first ring opening of donor-acceptor cyclopropanes with acyclic 1,3-diketones followed by DBU catalyzed retro-Claisen-type C-C bond cleavage reactions. In the first step, acyclic 1,3-diketones selectively worked as C-nucleophiles to add to donor-acceptor cyclopropanes. In the second step, the alkyl ketone part of the ring-opening products resulting from unsymmetrical 1,3-diketones was selectively cleaved in the presence of DBU in methanol.
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Affiliation(s)
- Dongxin Zhang
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology, No. 59 Hudong Road, Ma'anshan, Anhui 243002, China
| | - Hu Cai
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology, No. 59 Hudong Road, Ma'anshan, Anhui 243002, China
| | - Yan Chen
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology, No. 59 Hudong Road, Ma'anshan, Anhui 243002, China
| | - Lei Yin
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology, No. 59 Hudong Road, Ma'anshan, Anhui 243002, China
| | - Junchao Zhong
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology, No. 59 Hudong Road, Ma'anshan, Anhui 243002, China
| | - Ying Zhang
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology, No. 59 Hudong Road, Ma'anshan, Anhui 243002, China
| | - Qian-Feng Zhang
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology, No. 59 Hudong Road, Ma'anshan, Anhui 243002, China
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29
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Jacob A, Jones PG, Werz DB. (3 + 2)-Cycloaddition of Donor–Acceptor Cyclopropanes with Selenocyanate: Synthesis of Dihydroselenophenes and Selenophenes. Org Lett 2020; 22:8720-8724. [DOI: 10.1021/acs.orglett.0c03329] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Anu Jacob
- Technische Universität Braunschweig, Institute of Organic Chemistry, Hagenring 30, 38106 Braunschweig, Germany
| | - Peter G. Jones
- Institute of Inorganic and Analytical Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Daniel B. Werz
- Technische Universität Braunschweig, Institute of Organic Chemistry, Hagenring 30, 38106 Braunschweig, Germany
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30
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Yuan WC, Zhou XJ, Zhao JQ, Chen YZ, You Y, Wang ZH. Catalytic Enantioselective Dearomatization/Rearomatization of 2-Nitroindoles to Access 3-Indolyl-3′-Aryl-/Alkyloxindoles: Application in the Formal Synthesis of Cyclotryptamine Alkaloids. Org Lett 2020; 22:7088-7093. [DOI: 10.1021/acs.orglett.0c02350] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Wei-Cheng Yuan
- Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Xiao-Jian Zhou
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Generic Drug Research Center of Guizhou Province, School of Pharmacy, Zunyi Medical University, Zunyi 563006, China
| | - Jian-Qiang Zhao
- Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Yong-Zheng Chen
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Generic Drug Research Center of Guizhou Province, School of Pharmacy, Zunyi Medical University, Zunyi 563006, China
| | - Yong You
- Institute for Advanced Study, Chengdu University, Chengdu 610106, China
| | - Zhen-Hua Wang
- Institute for Advanced Study, Chengdu University, Chengdu 610106, China
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31
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Talukdar R. Synthetically important ring opening reactions by alkoxybenzenes and alkoxynaphthalenes. RSC Adv 2020; 10:31363-31376. [PMID: 35520658 PMCID: PMC9056427 DOI: 10.1039/d0ra05111j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 07/31/2020] [Indexed: 12/16/2022] Open
Abstract
Alkoxybenzenes and alkoxynaphthalenes, as nucleophiles, have drawn great attention from organic chemists over the decades. Due to their high ring strain, those particular classes of molecules are often used in synthesis by utilizing their properties to undergo facile Friedel-Crafts alkylations. Different isomeric and low or densely substituted alkoxybenzenes are used for synthesis according to the structure of the target molecule. Isomeric methoxybenzenes, are the most commonly used molecule in this regard. This review aims to comprehensively cover the instances of different alkoxy-benzenes/naphthalenes used as nucleophiles for ring opening.
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Affiliation(s)
- Ranadeep Talukdar
- Molecular Synthesis and Drug Discovery Laboratory, Centre of Biomedical Research, Sanjay Gandhi Postgraduate Institute of Medical Sciences Lucknow-226014 India
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32
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Wang S, Xie Z, Li M, Wang C. K 2CO 3‐Promoted Ring‐Opening/Cyclization Reactions of Multi‐substituted Donor‐Acceptor Cyclopropanes with Thiourea: Access to 2‐Amino‐4,6‐diarylnicotinonitrile Derivatives. ChemistrySelect 2020. [DOI: 10.1002/slct.202000810] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Shan Wang
- School of Chemistry and Chemical Engineering Yangzhou University 180 Siwangting Street Yangzhou 225002 P. R. China
| | - Zengyang Xie
- College of Basic Medicine Jining Medical University Jining 272067 PR China
| | - Mingshuang Li
- School of Chemistry and Chemical Engineering Yangzhou University 180 Siwangting Street Yangzhou 225002 P. R. China
| | - Cunde Wang
- School of Chemistry and Chemical Engineering Yangzhou University 180 Siwangting Street Yangzhou 225002 P. R. China
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33
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Lücht A, Kreft A, Jones PG, Werz DB. Ketenedithioacetals as Surrogates for the Formal Insertion of Ketenes into Donor–Acceptor Cyclopropanes. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000233] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Alexander Lücht
- Institute of Organic Chemistry Technische Universität Braunschweig Hagenring 30 38106 Braunschweig Germany
| | - Alexander Kreft
- Institute of Organic Chemistry Technische Universität Braunschweig Hagenring 30 38106 Braunschweig Germany
| | - Peter G. Jones
- Institute of Inorganic and Analytical Chemistry Technische Universität Braunschweig Hagenring 30 38106 Braunschweig Germany
| | - Daniel B. Werz
- Institute of Organic Chemistry Technische Universität Braunschweig Hagenring 30 38106 Braunschweig Germany
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34
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Zhang D, Zhong J, Yin L, Chen Y, Man J, Zhang QF. Desymmetrization of 1-Symmetrical Donor-Acceptor (D-A) Cyclopropanes via Reactions with 1,3-Cyclodiones. J Org Chem 2020; 85:5778-5786. [PMID: 32255650 DOI: 10.1021/acs.joc.9b03231] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new type of 1-unsymmetrical D-A cyclopropanes containing a cyclic enone motif was obtained by the desymmetrization of 1-symmetrical D-A cyclopropanes via first the Lewis acid-catalyzed O-nucleophilic ring-opening reaction with 1,3-cyclodiones followed by an organobase-promoted unexpected multistep intramolecular transformation.
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Affiliation(s)
- Dongxin Zhang
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology, No. 59 Hudong Road, Ma'anshan, Anhui 243002, China
| | - Junchao Zhong
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology, No. 59 Hudong Road, Ma'anshan, Anhui 243002, China
| | - Lei Yin
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology, No. 59 Hudong Road, Ma'anshan, Anhui 243002, China
| | - Yan Chen
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology, No. 59 Hudong Road, Ma'anshan, Anhui 243002, China
| | - Jingjing Man
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology, No. 59 Hudong Road, Ma'anshan, Anhui 243002, China
| | - Qian-Feng Zhang
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology, No. 59 Hudong Road, Ma'anshan, Anhui 243002, China
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35
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Guin A, Rathod T, Gaykar RN, Roy T, Biju AT. Lewis Acid Catalyzed Ring-Opening 1,3-Aminothiolation of Donor–Acceptor Cyclopropanes Using Sulfenamides. Org Lett 2020; 22:2276-2280. [DOI: 10.1021/acs.orglett.0c00483] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Avishek Guin
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
| | - Thukaram Rathod
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
| | - Rahul N. Gaykar
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
| | - Tony Roy
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
| | - Akkattu T. Biju
- Department of Organic Chemistry, Indian Institute of Science, Bangalore-560012, India
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36
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Werz DB, Biju AT. Uncovering the Neglected Similarities of Arynes and Donor-Acceptor Cyclopropanes. Angew Chem Int Ed Engl 2020; 59:3385-3398. [PMID: 31529661 PMCID: PMC7065169 DOI: 10.1002/anie.201909213] [Citation(s) in RCA: 172] [Impact Index Per Article: 43.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Indexed: 12/21/2022]
Abstract
Arynes and donor-acceptor (D-A) cyclopropanes are two classes of strained systems having the potential for numerous applications in organic synthesis. The last two decades have witnessed a renaissance of interest in the chemistry of these species primarily because of the mild and robust methods for their generation or activation. Commonly, arynes as easily polarizable systems result in 1,2-disubstitution, whereas D-A cyclopropanes as polarized systems lead to 1,3-bisfunctionalization thereby showing striking similarities. Transformations with 1,2- and 1,3-dipoles afford cyclic structures. With arynes, emerging four-membered rings as intermediates might react further, whereas the analogous five-membered rings obtained from D-A cyclopropanes are most often the final products. However, there are a few cases where these intermediates behave surprisingly differently. This Minireview highlights the parallels in reactivity between arynes and D-A cyclopropanes thereby shedding light on the neglected similarities of these two reactive species.
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Affiliation(s)
- Daniel B. Werz
- Technische Universität BraunschweigInstitut für Organische ChemieHagenring 3038106BraunschweigGermany
| | - Akkattu T. Biju
- Department of Organic ChemistryIndian Institute of ScienceBangalore560012India
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37
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Zhou Y, Xue R, Feng Y, Zhang L. How does HOTf/HFIP Cooperative System Catalyze the Ring‐Opening Reaction of Cyclopropanes? A DFT Study. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000031] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yongzhu Zhou
- Tianjin Engineering Technology Center of Chemical Wastewater Source Reduction and Recycling School of ScienceTianjin Chengjian University Tianjin 300384 P. R. of China
- School of Chemical Engineering and TechnologyTianjin University Tianjin 300072 P. R. China
| | - Rong‐Chao Xue
- Tianjin Engineering Technology Center of Chemical Wastewater Source Reduction and Recycling School of ScienceTianjin Chengjian University Tianjin 300384 P. R. of China
| | - Yaqing Feng
- School of Chemical Engineering and TechnologyTianjin University Tianjin 300072 P. R. China
| | - Lei Zhang
- Tianjin Engineering Technology Center of Chemical Wastewater Source Reduction and Recycling School of ScienceTianjin Chengjian University Tianjin 300384 P. R. of China
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38
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Dai L, Ye S. Photo/N-Heterocyclic Carbene Co-catalyzed Ring Opening and γ-Alkylation of Cyclopropane Enal. Org Lett 2020; 22:986-990. [PMID: 31951136 DOI: 10.1021/acs.orglett.9b04533] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An unprecedented photo/NHC-co-catalyzed ring-opening C-C bond cleavage of cyclopropane enal and the following γ-alkylation with a halogenated compound via radicals were established, affording the corresponding γ-alkylated α,β-unsaturated esters in moderate to good yields.
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Affiliation(s)
- Lei Dai
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences , Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190 , China.,University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Song Ye
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences , Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190 , China.,University of Chinese Academy of Sciences , Beijing 100049 , China
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39
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Zhang D, Yin L, Zhong J, Cheng Q, Cai H, Chen Y, Zhang QF. Ring-opening reactions of donor–acceptor cyclopropanes with cyclic ketals and thiol ketals. Org Biomol Chem 2020; 18:6492-6496. [DOI: 10.1039/d0ob01530j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Cyclic (thiol) ketals were used as hetero-nucleophiles for the ring opening of donor–acceptor cyclopropanes to afford functionalized diethers.
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Affiliation(s)
- Dongxin Zhang
- Institute of Molecular Engineering and Applied Chemistry
- Anhui University of Technology
- Ma'anshan 243002
- China
| | - Lei Yin
- Institute of Molecular Engineering and Applied Chemistry
- Anhui University of Technology
- Ma'anshan 243002
- China
| | - Junchao Zhong
- Institute of Molecular Engineering and Applied Chemistry
- Anhui University of Technology
- Ma'anshan 243002
- China
| | - Qihang Cheng
- Institute of Molecular Engineering and Applied Chemistry
- Anhui University of Technology
- Ma'anshan 243002
- China
| | - Hu Cai
- Institute of Molecular Engineering and Applied Chemistry
- Anhui University of Technology
- Ma'anshan 243002
- China
| | - Yan Chen
- Institute of Molecular Engineering and Applied Chemistry
- Anhui University of Technology
- Ma'anshan 243002
- China
| | - Qian-Feng Zhang
- Institute of Molecular Engineering and Applied Chemistry
- Anhui University of Technology
- Ma'anshan 243002
- China
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40
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Werz DB, Biju AT. Über bislang nicht beachtete Parallelen in der Reaktivität von Arinen und Donor‐Akzeptor‐Cyclopropanen. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201909213] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Daniel B. Werz
- Technische Universität BraunschweigInstitut für Organische Chemie Hagenring 30 38106 Braunschweig Deutschland
| | - Akkattu T. Biju
- Department of Organic ChemistryIndian Institute of Science Bangalore 560012 Indien
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41
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Augustin AU, Merz JL, Jones PG, Mlostoń G, Werz DB. (4 + 3)-Cycloaddition of Donor–Acceptor Cyclopropanes with Thiochalcones: A Diastereoselective Access to Tetrahydrothiepines. Org Lett 2019; 21:9405-9409. [DOI: 10.1021/acs.orglett.9b03623] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- André U. Augustin
- Technische Universität Braunschweig, Institute of Organic Chemistry and Institute of Inorganic and Analytical Chemistry, Hagenring 30, 38106 Braunschweig, Germany
| | - J. Luca Merz
- Technische Universität Braunschweig, Institute of Organic Chemistry and Institute of Inorganic and Analytical Chemistry, Hagenring 30, 38106 Braunschweig, Germany
| | - Peter G. Jones
- Technische Universität Braunschweig, Institute of Organic Chemistry and Institute of Inorganic and Analytical Chemistry, Hagenring 30, 38106 Braunschweig, Germany
| | - Grzegorz Mlostoń
- Department of Organic and Applied Chemistry, University of Łodź, Tamka 12, 91-403 Łodź, Poland
| | - Daniel B. Werz
- Technische Universität Braunschweig, Institute of Organic Chemistry and Institute of Inorganic and Analytical Chemistry, Hagenring 30, 38106 Braunschweig, Germany
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42
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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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43
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Wang D, Zhao J, Chen J, Xu Q, Li H. Intramolecular Arylative Ring Opening of Donor‐Acceptor Cyclopropanes in the Presence of Triflic Acid: Synthesis of 9
H
‐Fluorenes and 9,10‐Dihydrophenanthrenes. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900523] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Dongyang Wang
- College of Chemistry and Materials EngineeringWenzhou University Wenzhou, Zhejiang 325035 China
| | - Jing Zhao
- College of Chemistry and Materials EngineeringWenzhou University Wenzhou, Zhejiang 325035 China
| | - Jun Chen
- Beijing Institute of Microchemistry No.15 Xinjiangongmen Road, Haidian District Beijing 100091 China
| | - Qing Xu
- College of Chemistry and Materials EngineeringWenzhou University Wenzhou, Zhejiang 325035 China
| | - Huan Li
- College of Chemistry and Materials EngineeringWenzhou University Wenzhou, Zhejiang 325035 China
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44
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Sundaravelu N, Sekar G. Domino Synthesis of Thioflavones and Thioflavothiones by Regioselective Ring Opening of Donor–Acceptor Cyclopropane Using In-Situ-Generated Thiolate Anions. Org Lett 2019; 21:6648-6652. [DOI: 10.1021/acs.orglett.9b02210] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Nallappan Sundaravelu
- Department of Chemistry, Indian Institute of Technology Madras, Chennai-600036, Tamil Nadu, India
| | - Govindasamy Sekar
- Department of Chemistry, Indian Institute of Technology Madras, Chennai-600036, Tamil Nadu, India
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45
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Augustin AU, Jones PG, Werz DB. Ring-Opening 1,3-Aminochalcogenation of Donor-Acceptor Cyclopropanes: A Three-Component Approach. Chemistry 2019; 25:11620-11624. [PMID: 31282001 PMCID: PMC6771889 DOI: 10.1002/chem.201902160] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 06/28/2019] [Indexed: 12/21/2022]
Abstract
A 1,3‐aminothiolation was realized by reacting 2‐substituted cyclopropane 1,1‐dicarboxylates with sulfonamides and N‐(arylthio)succinimides. Under Sn(OTf)2 catalysis the transformation proceeded smoothly to the corresponding ring‐opened products bearing the sulfonamide in the 1‐position next to the donor and the arylthio residue in the 3‐position next to the acceptor. The procedure was extended to the corresponding selenium analogues by employing N‐(phenylseleno)succinimides as an electrophilic selenium source.
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Affiliation(s)
- André U Augustin
- Institute of Organic Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106, Braunschweig, Germany
| | - Peter G Jones
- Institute of Inorganic and Analytical Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106, Braunschweig, Germany
| | - Daniel B Werz
- Institute of Organic Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106, Braunschweig, Germany
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46
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Kreft A, Ehlers S, Jones PG, Werz DB. Ring-Opening Reactions of Donor-Acceptor Cyclobutanes with Electron-Rich Arenes, Thiols, and Selenols. Org Lett 2019; 21:6315-6319. [PMID: 31380647 DOI: 10.1021/acs.orglett.9b02197] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Donor-acceptor (D-A) cyclobutanes with two geminal ester groups as acceptors are reacted with electron-rich arenes as nucleophiles to afford ring-opened products. AlCl3 mediates this Friedel-Crafts-type reaction. A variety of donors and electron-rich arenes are used. Nucleophilic thiols and selenols also trigger this ring-opening reaction. Furthermore, a comparison of various physical parameters has been carried out for several D-A cyclobutanes.
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47
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Lücht A, Sobottka S, Patalag LJ, Jones PG, Reissig HU, Sarkar B, Werz DB. New Dyes Based on Extended Fulvene Motifs: Synthesis through Redox Reactions of Naphthoquinones with Donor-Acceptor Cyclopropanes and Their Spectroelectrochemical Behavior. Chemistry 2019; 25:10359-10365. [PMID: 31106926 DOI: 10.1002/chem.201900764] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 05/16/2019] [Indexed: 01/16/2023]
Abstract
Novel dyes based on extended fulvene motifs are reported. The carbon skeleton was generated by a catalyzed addition of donor-acceptor cyclopropanes to naphthoquinone. The hydroxy group at the central ring of the tricyclic fulvene motif was converted into the triflate, which reacted efficiently with a wide range of nucleophiles, resulting in substitution and thereby providing new derivatives. The synthetic versatility allowed us to investigate the absorption, electrochemical, and UV/Vis-NIR spectroelectrochemical properties of these dyes as a function of the substituents. The dyes were shown to participate in reductive electrochemistry, the reversibility of which can be improved by appropriate selection of the substituents. Additionally, first signs of NIR electrochromism are presented, opening new avenues for the future investigations of such dyes.
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Affiliation(s)
- Alexander Lücht
- Technische Universität Braunschweig, Institut für Organische Chemie, Hagenring 30, 38106, Braunschweig, Germany
| | - Sebastian Sobottka
- Institut für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstrasse 34-36, 14195, Berlin, Germany
| | - Lukas J Patalag
- Technische Universität Braunschweig, Institut für Organische Chemie, Hagenring 30, 38106, Braunschweig, Germany
| | - Peter G Jones
- Technische Universität Braunschweig, Institut für Anorganische und Analytische Chemie, Hagenring 30, 38106, Braunschweig, Germany
| | - Hans-Ulrich Reissig
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, 14195, Berlin, Germany
| | - Biprajit Sarkar
- Institut für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstrasse 34-36, 14195, Berlin, Germany
| | - Daniel B Werz
- Technische Universität Braunschweig, Institut für Organische Chemie, Hagenring 30, 38106, Braunschweig, Germany
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48
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Okabe A, Harada S, Takeda T, Nishida A. One-Pot Synthesis of Cycloocta[b
]indole Through Formal [5+3] Cycloaddition Using Donor-Acceptor Cyclopropanes. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900610] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Akito Okabe
- Graduate School of Pharmaceutical Sciences; Chiba University; 1-8-1 Inohana, Chuo-ku 260-8675 Chiba Japan
| | - Shinji Harada
- Graduate School of Pharmaceutical Sciences; Chiba University; 1-8-1 Inohana, Chuo-ku 260-8675 Chiba Japan
- Molecular Chirality Research Center; Chiba University; 1-33 Yayoi-cho, Inage-ku 263-8522 Chiba Japan
| | - Takuya Takeda
- Graduate School of Pharmaceutical Sciences; Chiba University; 1-8-1 Inohana, Chuo-ku 260-8675 Chiba Japan
| | - Atsushi Nishida
- Graduate School of Pharmaceutical Sciences; Chiba University; 1-8-1 Inohana, Chuo-ku 260-8675 Chiba Japan
- Molecular Chirality Research Center; Chiba University; 1-33 Yayoi-cho, Inage-ku 263-8522 Chiba Japan
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49
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Liang T, Xie M, Qu G, Guo H. Scandium‐Triflate‐Catalyzed Regioselective Ring Opening of Purines with Aminocyclopropanes. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900227] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Tao Liang
- Henan Key Laboratory of Organic Functional Molecules and Drugs Innovation Key Laboratory of Green Chemical Media and Reactions, Ministry of Education Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals School of Chemistry and Chemical EngineeringHenan Normal University Xinxiang Henan 453007 China
| | - Ming‐Sheng Xie
- Henan Key Laboratory of Organic Functional Molecules and Drugs Innovation Key Laboratory of Green Chemical Media and Reactions, Ministry of Education Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals School of Chemistry and Chemical EngineeringHenan Normal University Xinxiang Henan 453007 China
| | - Gui‐Rong Qu
- Henan Key Laboratory of Organic Functional Molecules and Drugs Innovation Key Laboratory of Green Chemical Media and Reactions, Ministry of Education Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals School of Chemistry and Chemical EngineeringHenan Normal University Xinxiang Henan 453007 China
| | - Hai‐Ming Guo
- Henan Key Laboratory of Organic Functional Molecules and Drugs Innovation Key Laboratory of Green Chemical Media and Reactions, Ministry of Education Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals School of Chemistry and Chemical EngineeringHenan Normal University Xinxiang Henan 453007 China
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50
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Nambu H, Onuki Y, Ono N, Tsuge K, Yakura T. Ring-opening cyclization of spirocyclopropanes with stabilized sulfonium ylides for the construction of a chromane skeleton. Chem Commun (Camb) 2019; 55:6539-6542. [PMID: 31106310 DOI: 10.1039/c9cc03023a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Regioselective ring-opening cyclization of cyclohexane-1,3-dione-2-spirocyclopropanes with stabilized sulfonium ylides provided 2,3-trans-disubstituted 2,3,4,6,7,8-hexahydro-5H-1-benzopyran-5-ones in high yields without the formation of any isomers. The obtained product was readily converted into highly substituted chromane.
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Affiliation(s)
- Hisanori Nambu
- Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Sugitani, Toyama 930-0194, Japan.
| | - Yuta Onuki
- Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Sugitani, Toyama 930-0194, Japan.
| | - Naoki Ono
- Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Sugitani, Toyama 930-0194, Japan.
| | - Kiyoshi Tsuge
- Graduate School of Science and Engineering, University of Toyama, Gofuku, Toyama 930-8555, Japan
| | - Takayuki Yakura
- Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Sugitani, Toyama 930-0194, Japan.
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