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Maashi HA, Husayni AH, Harnedy J, Morrill LC. Electrochemical deconstructive functionalization of arylcycloalkanes via fragmentation of anodically generated aromatic radical cations. Chem Commun (Camb) 2024; 60:11190-11201. [PMID: 39268719 DOI: 10.1039/d4cc03279a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/15/2024]
Abstract
This highlight summarises electrochemical approaches for the deconstructive functionalization of arylcycloalkanes via the fragmentation of anodically generated aromatic radical cations. A diverse range of deconstructive functionalization processes is described, including discussion on the electrochemical reaction conditions employed, scope and limitations, and reaction mechanisms, in addition to highlighting future opportunities in this burgeoning area of sustainable synthesis.
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Affiliation(s)
- Hussain A Maashi
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK.
- Department of Chemistry, College of Science, University of Bisha, Bisha 61922, Saudi Arabia
| | - Abdulrahman H Husayni
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK.
| | - James Harnedy
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK.
| | - Louis C Morrill
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK.
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK
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2
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Gopal B, Lamba M, Kushwaha A, Singh PR, Dhilip Kumar TJ, Goswami A. Nucleophilic Ring Opening of Donor-Acceptor Cyclopropanes through Umpolung Reactivity of Organochlorophosphines: Phosphine Oxide-Functionalized Boron-Pendanted Compounds. Org Lett 2024. [PMID: 39331959 DOI: 10.1021/acs.orglett.4c02418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/29/2024]
Abstract
We present a novel set of frustrated Lewis pair (FLP) systems that exhibit a remarkable ability to promote the ring opening of donor-acceptor cyclopropanes (DACs). This FLP-promoted protocol offers umpolung reactivity of R1R2PCl/CN (R1, R2 = aryl, alkyl) toward DACs via nucleophilic ring-opening reactions to provide phosphinated boron-pendanted diester compounds. This novel approach exhibits the dual role of BF3·OEt2 as an activator and a reactant. The resulting compounds were found in both the keto and enol forms, with the majority being in the keto form, according to NMR analysis. The enol form was identified by single-crystal XRD analysis, and DFT calculations indicated that the keto form is more stable than the corresponding enol form.
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Affiliation(s)
- Braj Gopal
- Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, Punjab-140001, India
| | - Manisha Lamba
- Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, Punjab-140001, India
| | - Apoorv Kushwaha
- Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, Punjab-140001, India
| | - Prasoon Raj Singh
- Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, Punjab-140001, India
| | - T J Dhilip Kumar
- Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, Punjab-140001, India
| | - Avijit Goswami
- Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, Punjab-140001, India
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3
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Shorokhov VV, Chabuka BK, Tikhonov TP, Filippova AV, Zhokhov SS, Tafeenko VA, Andreev IA, Ratmanova NK, Uchuskin MG, Trushkov IV, Alabugin IV, Ivanova OA. Converting Strain Release into Aromaticity Loss for Activation of Donor-Acceptor Cyclopropanes: Generation of Quinone Methide Traps for C-Nucleophiles. Org Lett 2024; 26:8177-8182. [PMID: 39265076 DOI: 10.1021/acs.orglett.4c03106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/14/2024]
Abstract
Here, we present a new approach for the activation of donor-acceptor cyclopropanes in ring-opening reactions, which does not require the use of a Lewis or Brønsted acid as a catalyst. Donor-acceptor cyclopropanes containing a phenolic group as the donor undergo deprotonation and isomerization to form the corresponding quinone methides. This innovative strategy was applied to achieve (4 + 1)-annulation of cyclopropanes with sulfur ylides, affording functionalized dihydrobenzofurans. Additionally, the generated ortho- and para-(aza)quinone methides can be trapped by various CH-acids.
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Affiliation(s)
- Vitaly V Shorokhov
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie gory 1-3, Moscow 119991, Russia
| | - Beauty K Chabuka
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
| | - Timur P Tikhonov
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie gory 1-3, Moscow 119991, Russia
| | - Anastasia V Filippova
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie gory 1-3, Moscow 119991, Russia
| | - Sergey S Zhokhov
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie gory 1-3, Moscow 119991, Russia
| | - Victor A Tafeenko
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie gory 1-3, Moscow 119991, Russia
| | - Ivan A Andreev
- Organic Chemistry Department, Science Faculty, Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya 6, Moscow 117198, Russia
| | - Nina K Ratmanova
- Organic Chemistry Department, Science Faculty, Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya 6, Moscow 117198, Russia
| | - Maxim G Uchuskin
- Department of Chemistry, Perm State University, Bukireva 15, Perm 614990, Russia
| | - Igor V Trushkov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky pr. 47, Moscow 119991, Russia
| | - Igor V Alabugin
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306-4390, United States
| | - Olga A Ivanova
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie gory 1-3, Moscow 119991, Russia
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4
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Indurmuddam RR, Huang PC, Hong BC, Chien SY. Visible-Light-Photocatalyzed Self-Cyclopropanation Reactions of Dibenzoylmethanes for the Synthesis of Cyclopropanes. Org Lett 2024; 26:5752-5757. [PMID: 38949643 DOI: 10.1021/acs.orglett.4c01875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/02/2024]
Abstract
A new self-cyclopropanation of 1,3-diphenylpropane-1,3-dione, leading to tetrasubstituted cyclopropane containing three contiguous stereogenic centers with high stereoselectivity, has been achieved through violet-light-emitting diode-irradiated photocatalysis, featuring both cycloaddition and a distinctive rearrangement. Diverging from conventional cyclopropanation pathways, this reaction yields a tetrasubstituted cyclopropane through unprecedented rearrangement and cascade reactions.
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Affiliation(s)
| | - Pei-Chi Huang
- Department of Chemistry and Biochemistry, National Chung Cheng University, Chia-Yi 621, Taiwan ROC
| | - Bor-Cherng Hong
- Department of Chemistry and Biochemistry, National Chung Cheng University, Chia-Yi 621, Taiwan ROC
| | - Su-Ying Chien
- Instrumentation Center, National Taiwan University, Taipei 106, Taiwan ROC
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5
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Reyes E, Uria U, Prieto L, Carrillo L, Vicario JL. Organocatalysis as an enabling tool for enantioselective ring-opening reactions of cyclopropanes. Chem Commun (Camb) 2024; 60:7288-7298. [PMID: 38938176 DOI: 10.1039/d4cc01933d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/29/2024]
Abstract
The rich reactivity profile of cyclopropanes has been extensively explored to trigger new organic transformations that enable unusual disconnective approaches to synthesize molecular motifs that are not easily reached through conventional reactions. In particular, the chemistry of cyclopropanes has received special attention in the last decade, with multiple new approaches that capitalize on the use of organocatalysis for the activation of the cyclopropane scaffold. This situation has also opened the possibility of developing enantioselective variants of many reactions that until now were only carried out in an enantiospecific or diastereoselective manner. Our group has been particularly active in this field, focusing more specifically on the use of aminocatalysis and Brønsted acid catalysis as major organocatalytic activation manifolds to trigger new unprecedented transformations involving cyclopropanes that add to the current toolbox of general methodologies available to organic chemists for the enantioselective synthesis of chiral compounds.
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Affiliation(s)
- Efraim Reyes
- Department of Organic and Inorganic Chemistry, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain.
| | - Uxue Uria
- Department of Organic and Inorganic Chemistry, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain.
| | - Liher Prieto
- Department of Organic and Inorganic Chemistry, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain.
| | - Luisa Carrillo
- Department of Organic and Inorganic Chemistry, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain.
| | - Jose L Vicario
- Department of Organic and Inorganic Chemistry, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain.
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6
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Yaragorla S, Tiwari D, Lone MS. Mechanochemical Cascade Cyclization of Cyclopropyl Ketones with 1,2-Diamino Arenes for the Direct Synthesis of 1,2-Disubstituted Benzimidazoles†. J Org Chem 2024; 89:9427-9439. [PMID: 38905327 DOI: 10.1021/acs.joc.4c00716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/23/2024]
Abstract
A mechanochemical synthesis of 1,2-disubstituted benzimidazoles from donor-acceptor cyclopropyl ketones and 1,2-diaminoarenes under metal-free and solventless conditions is reported. The reaction does not require inert conditions and is promoted by a stoichiometric amount of 1,1,1,3,3,3-hexafluoroisopropanol. This cascade reaction involves ring-opening, cyclization, and retro-Mannich reaction of cyclopropyl ketones with aryl 1,2-diamines. Compared to its solution-phase counterpart, this mechanochemical approach shows fast reactivity (24 vs 1.5 h). Mechanistic investigations by electrospray ionization mass spectrometry helped us to propose the reaction mechanism.
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Affiliation(s)
- Srinivasarao Yaragorla
- School of Chemistry, University of Hyderabad, P.O. Central University, Gachibowli, Hyderabad 500046, India
| | - Divyanshu Tiwari
- School of Chemistry, University of Hyderabad, P.O. Central University, Gachibowli, Hyderabad 500046, India
| | - Mehak Saba Lone
- School of Chemistry, University of Hyderabad, P.O. Central University, Gachibowli, Hyderabad 500046, India
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7
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Yang D, Ding H, Zhang XL, Zhang H, Zhang Y, Liu XW. Esterification and Etherification of Aliphatic Alcohols Enabled by Catalytic Strain-Release of Donor-Acceptor Cyclopropane. Org Lett 2024; 26:4986-4991. [PMID: 38842488 DOI: 10.1021/acs.orglett.4c01637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2024]
Abstract
We herein disclose a highly efficient protocol for the esterification and etherification of alcohols, leveraging a Sc(OTf)3-catalyzed ring-strain release event in the meticulously designed, chromatographically stable mixed anhydrides or benzyl esters that incorporate an intramolecular donor-acceptor cyclopropane (DAC). This versatile method facilitates the straightforward functionalization of sugar, terpene, and steroid alcohols under mild acidic conditions, as showcased by the single-catalyst-driven, dual protection of sugar diol.
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Affiliation(s)
- Dan Yang
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore
| | - Han Ding
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore
| | - Xiao-Lin Zhang
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore
| | - Huajun Zhang
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore
| | - Yuhan Zhang
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore
| | - Xue-Wei Liu
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore
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8
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Zhang Z, Gevorgyan V. Visible Light-Induced Reactions of Diazo Compounds and Their Precursors. Chem Rev 2024; 124:7214-7261. [PMID: 38754038 DOI: 10.1021/acs.chemrev.3c00869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
In recent years, visible light-induced reactions of diazo compounds have attracted increasing attention in organic synthesis, leading to improvement of existing reactions, as well as to the discovery of unprecedented transformations. Thus, photochemical or photocatalytic generation of both carbenes and radicals provide milder tools toward these key intermediates for many valuable transformations. However, the vast majority of the transformations represent new reactivity modes of diazo compounds, which are achieved by the photochemical decomposition of diazo compounds and photoredox catalysis. In particular, the use of a redox-active photocatalysts opens the avenue to a plethora of radical reactions. The application of these methods to diazo compounds led to discovery of transformations inaccessible by the classical reactivity associated with carbenes and metal carbenes. In most cases, diazo compounds act as radical sources but can also serve as radical acceptors. Importantly, the described processes operate under mild, practical conditions. This Review describes this subfield of diazo compound chemistry, particularly focusing on recent advancements.
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Affiliation(s)
- Ziyan Zhang
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080-3021, United States
| | - Vladimir Gevorgyan
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080-3021, United States
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9
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Lei S, Wang H, Wang SR. Catalytic Intramolecular Ketone Haloacylation Enabled Stereoselective Heterolytic Cleavage of Cyclopropyl Ketones with Enhanced Reactivity and Regioselectivity beyond Electronics. Org Lett 2024; 26:4111-4116. [PMID: 38717836 DOI: 10.1021/acs.orglett.4c01241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
By integration of oxocarbenium activation and Lewis acid coordination activation via conformational proximity-driven, Pd(II)- or Cu(I)-catalyzed intramolecular ketone haloacylation, regio- and stereoselective heterolytic ring-opening 1,5-haloacylation of cyclopropyl ketones, including those with weak single alkyl donors, has been developed for the synthesis of valuable α-quaternary halo-γ-butenolides. The vicinal carboxylic acid and ketone acceptors are no longer just spectator activators. Further, this reaction delivers a constant regioselectivity regardless of the electronic nature of substituents, even the malonate.
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10
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Yang L, Wang H, Lang M, Wang J, Peng S. B(C 6F 5) 3-Catalyzed Formal ( n + 3) ( n = 5 and 6) Cycloaddition of Bicyclo[1.1.0]butanes to Medium Bicyclo[ n.1.1]alkanes. Org Lett 2024; 26:4104-4110. [PMID: 38700913 DOI: 10.1021/acs.orglett.4c01219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
Herein, a B(C6F5)3-catalyzed formal (n + 3) (n = 5 and 6) cycloaddition of bicyclo[1.1.0]butanes (BCBs) with imidazolidines/hexahydropyrimidines is described. The reaction provides a modular, atom-economical, and efficient strategy to two libraries of synthetically challenging medium-bridged rings, 2,5-diazabicyclo[5.1.1]nonanes and 2,6-diazabicyclo[6.1.1]decanes, in moderate to excellent yields. This reaction also features simple operation, mild reaction conditions, and broad substrate scope. A scale-up experiment and various synthetic transformations of products further highlight the synthetic utility.
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Affiliation(s)
- Liangliang Yang
- School of Pharmacy and Food Engineering, Wuyi University, Jiangmen, Guangdong 529020, People's Republic of China
| | - Haiyang Wang
- School of Pharmacy and Food Engineering, Wuyi University, Jiangmen, Guangdong 529020, People's Republic of China
| | - Ming Lang
- School of Pharmacy and Food Engineering, Wuyi University, Jiangmen, Guangdong 529020, People's Republic of China
| | - Jian Wang
- School of Pharmacy and Food Engineering, Wuyi University, Jiangmen, Guangdong 529020, People's Republic of China
- School of Pharmaceutical Sciences, Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, People's Republic of China
| | - Shiyong Peng
- School of Pharmacy and Food Engineering, Wuyi University, Jiangmen, Guangdong 529020, People's Republic of China
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11
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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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12
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Jiang Y, Ma HJ, Zhai CY, Wang XL. Sn(OTf) 2-Catalyzed (3 + 2) Cycloaddition/Sulfur Rearrangement Reaction of Donor-Acceptor Cyclopropanes with Indoline-2-thiones. Org Lett 2024; 26:1672-1676. [PMID: 38359067 DOI: 10.1021/acs.orglett.4c00173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
The (3 + 2) cycloaddition/sulfur rearrangement reaction of donor-acceptor cyclopropanes bearing a single keto acceptor with indoline-2-thiones has been realized. Under the catalysis of Sn(OTf)2, a series of functionalized 3-indolyl-4,5-dihydrothiophenes were synthesized with moderate to excellent yields.
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Affiliation(s)
- Yan Jiang
- Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education, College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China
| | - Hao-Jie Ma
- Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education, College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China
| | - Chen-Ying Zhai
- Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education, College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China
| | - Xue-Long Wang
- Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education, College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China
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13
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Plodukhin AY, Boichenko MA, Andreev IA, Tarasenko EA, Anisovich KV, Ratmanova NK, Zhokhov SS, Trushkov IV, Ivanova OA. Concise approach to γ-(het)aryl- and γ-alkenyl-γ-aminobutyric acids. Synthesis of vigabatrin. Org Biomol Chem 2024; 22:1027-1033. [PMID: 38193622 DOI: 10.1039/d3ob01769a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2024]
Abstract
γ-Aminobutyric acid (GABA) and GABA derivatives have attracted increased attention over the years in the fields of medicinal chemistry and chemical biology due to their interesting biological properties and synthetic relevance. Here, we report a short synthetic route to γ-(het)aryl- and γ-alkenyl-γ-aminobutyric acids, including the antiepileptic drug vigabatrin, from readily available donor-acceptor cyclopropanes and ammonia or methylamine. This protocol includes a facile synthesis of 2-oxopyrrolidine-3-carboxamides and their acid hydrolysis to γ-aryl- or γ-alkenyl-substituted GABAs, which can serve as perspective building blocks for the synthesis of various GABA-based N-heterocycles and bioactive compounds.
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Affiliation(s)
- Andrey Yu Plodukhin
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie gory 1-3, Moscow 119991, Russia.
| | - Maksim A Boichenko
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie gory 1-3, Moscow 119991, Russia.
| | - Ivan A Andreev
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Leninsky pr. 47, Moscow 119991, Russia.
- Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and Immunology, Samory Mashela 1, Moscow 117997, Russia
| | - Elena A Tarasenko
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie gory 1-3, Moscow 119991, Russia.
| | - Kanstantsin V Anisovich
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie gory 1-3, Moscow 119991, Russia.
| | - Nina K Ratmanova
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Leninsky pr. 47, Moscow 119991, Russia.
- Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and Immunology, Samory Mashela 1, Moscow 117997, Russia
| | - Sergey S Zhokhov
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie gory 1-3, Moscow 119991, Russia.
| | - Igor V Trushkov
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Leninsky pr. 47, Moscow 119991, Russia.
| | - Olga A Ivanova
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie gory 1-3, Moscow 119991, Russia.
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14
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Woelk KJ, Dhake K, Schley ND, Leitch DC. Enolate addition to bicyclobutanes enables expedient access to 2-oxo-bicyclohexane scaffolds. Chem Commun (Camb) 2023; 59:13847-13850. [PMID: 37921805 DOI: 10.1039/d3cc04234k] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2023]
Abstract
We report the synthesis of 2-oxo-bicyclo[2.1.1]hexanes (2-oxo-BCHs) from bicyclobutanes (BCBs) and readily available enolate precursors. Glycine-derived enolates directly give protected 2-oxo-3-amino-BCH derivatives that can be further functionalized. Arylacetate derivatives are also suitable enolate precursors, giving 2-oxo-3-aryl-BCH scaffolds from readily available starting materials.
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Affiliation(s)
- Kyla J Woelk
- Department of Chemistry, University of Victoria, 3800 Finnerty Rd., Victoria, BC, V8P 5C2, Canada.
| | - Kushal Dhake
- Department of Chemistry, University of Victoria, 3800 Finnerty Rd., Victoria, BC, V8P 5C2, Canada.
| | - Nathan D Schley
- Department of Chemistry, Vanderbilt University, 2301 Vanderbilt Place, Nashville, TN, 37235, USA
| | - David C Leitch
- Department of Chemistry, University of Victoria, 3800 Finnerty Rd., Victoria, BC, V8P 5C2, Canada.
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15
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Suthar S, Mondal KC. Open shell versus closed shell bonding interaction in cyclopropane derivatives: EDA-NOCV analyses. J Comput Chem 2023; 44:2184-2211. [PMID: 37530758 DOI: 10.1002/jcc.27190] [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: 04/27/2023] [Revised: 06/19/2023] [Accepted: 06/21/2023] [Indexed: 08/03/2023]
Abstract
Cyclopropane ring is a very common motif in organic/bio-organic compounds. The chemical bonding of this strained ring is taught to all chemistry students. This three-membered cyclic, C3 ring is quite reactive which has attracted both, synthetic and theoretical chemists to rationalize/correlate its stability and bonding with its reactivity and physical properties over a century. There are a few bonding models (mainly the Bent-Bond model and Walsh model) of this C3 ring that are debated to date. Herein, we have carried out energy decomposition analysis coupled with natural orbital for chemical valence (EDA-NOCV) to study the two most reactive bonds of cyclopropane rings of 49 different organic compounds containing different functional groups to obtain a much deeper bonding insight toward a more general bonding model of this class of compounds. The EDA-NOCV analyses of fragment orbitals and susequent bond formation revealed that the nature of the CC bond of the cyclopropane (splitting two bonds at a time out of three CC bonds) ring is preferred to form two dative covalent CC bonds (between a singlet olefin-fragment and an excited singlet carbene-fragment with a vacant sp2 orbital and a filled p-orbital) for the majority (37/49) of compounds over two covalent electron sharing bonds in some (7/49) compounds (between an excited triplet olefin and triplet carbene), while a few (5/49) compounds show flexibility to adopt either the electron sharing or dative covalent bond as both are equally possible. The effects of functional groups on the nature of chemical bond in cyclopropane rings have been studied in detail. Our bonding analyses are in line with the QTAIM analyses which produce small negative values of the Laplacian, significantly positive values of bond ellipticity, and accumulation of electron densities around the ring critical point of C3 -rings. These corresponding QTAIM parameters of C3 -rings are quite different for CC single bonds of normal hydrocarbons as expected. The chemical bonding in the majority of cyclopropane rings can be very similar to those of metal-olefin systems.
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Affiliation(s)
- Sonam Suthar
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, India
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16
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Jiang Y, Ma HJ, Wang XL, Yang Y. Yb(OTf) 3-Catalyzed Formal (4 + 3) Cycloaddition Reactions of 3-Benzylideneindoline-2-thiones with Donor-Acceptor Cyclopropanes. J Org Chem 2023; 88:14587-14600. [PMID: 37819164 DOI: 10.1021/acs.joc.3c01609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/13/2023]
Abstract
A Yb(OTf)3-catalyzed formal (4 + 3) cycloaddition reaction of donor-acceptor cyclopropanes with 3-benzylideneindoline-2-thiones as sulfur-containing 4π components has been successfully achieved. A series of functionalized 5,10-dihydro-2H-thiepino[2,3-b]indole derivatives were synthesized with good yields and moderate to good diastereoselectivity. The reaction described herein represented the inaugural (4 + 3) cycloaddition of 3-benzylideneindoline-2-thiones.
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Affiliation(s)
- Yan Jiang
- Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education, College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China
| | - Hao-Jie Ma
- Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education, College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China
| | - Xue-Long Wang
- Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education, College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China
| | - Yi Yang
- Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education, College of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China
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17
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Suzuki I, Kasahara N, Ogura K, Shibata I. Annulation of a Methylenecyclopropane with Cyanoalkenes Catalyzed by Lewis Bases. Chemistry 2023:e202302365. [PMID: 37798939 DOI: 10.1002/chem.202302365] [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: 07/24/2023] [Revised: 09/26/2023] [Accepted: 10/06/2023] [Indexed: 10/07/2023]
Abstract
The annulation of a methylenecyclopropane with acyl cyanoalkenes by using DABCO or quinuclidine as a catalyst to give 2,3-dihydofurans has been developed. A stoichiometric amount of the Lewis bases promoted the isomerization of 2,3-dihydrofurans to furans. 1 H NMR spectra of the reaction in situ revealed that the methylenecyclopropane is opened by the Lewis base to form a reaction intermediate that is added to the cyanoalkenes.
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Affiliation(s)
- Itaru Suzuki
- Research Center for Preservation, Osaka University, 2-4, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Nozomi Kasahara
- Division of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Kazuki Ogura
- Division of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1, Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Ikuya Shibata
- Research Center for Preservation, Osaka University, 2-4, Yamadaoka, Suita, Osaka, 565-0871, Japan
- Division of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1, Yamadaoka, Suita, Osaka, 565-0871, Japan
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18
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Zhou W, Chen P, Li ZQ, Xiao LT, Bai J, Song XR, Luo MJ, Xiao Q. Electrochemical 1,3-Alkyloxylimidation of Arylcyclopropane Radical Cations: Four-Component Access to Imide Derivatives. Org Lett 2023; 25:6919-6924. [PMID: 37695045 DOI: 10.1021/acs.orglett.3c02744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
Herein, a general electrochemical radical-cation-mediated four-component ring-opening 1,3-alkyloxylimidation of arylcyclopropanes, acetonitrile, carboxylic acids, and alcohols is described, providing a facile and sustainable approach to quickly construct structurally diverse imide derivatives from easily available raw materials in an operationally simple undivided cell. This metal-catalyst- and oxidant-free single-electron oxidation strategy offers a green alternative for the formation of highly reactive cyclopropane-derived radical cations, and this protocol features a broad functional group tolerance.
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Affiliation(s)
- Wei Zhou
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science and Technology Normal University, Nanchang, Jiangxi 330013, China
| | - Peng Chen
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science and Technology Normal University, Nanchang, Jiangxi 330013, China
| | - Zi-Qiong Li
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science and Technology Normal University, Nanchang, Jiangxi 330013, China
| | - Li-Tong Xiao
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science and Technology Normal University, Nanchang, Jiangxi 330013, China
| | - Jiang Bai
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science and Technology Normal University, Nanchang, Jiangxi 330013, China
| | - Xian-Rong Song
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science and Technology Normal University, Nanchang, Jiangxi 330013, China
| | - Mu-Jia Luo
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science and Technology Normal University, Nanchang, Jiangxi 330013, China
| | - Qiang Xiao
- Key Laboratory of Organic Chemistry of Jiangxi Province, Jiangxi Science and Technology Normal University, Nanchang, Jiangxi 330013, China
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19
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Nanda SK. Asymmetric cascades of the π-allyl complex: a journey from transition-metal catalysis to metallaphotocatalysis. Chem Commun (Camb) 2023; 59:11298-11319. [PMID: 37670574 DOI: 10.1039/d3cc03010e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/07/2023]
Abstract
The enantioselective catalytic cascade involving Tsuji-Trost allylation has provided a viable strategy for the construction of multiple asymmetric C-C and C-X centres and numerous methods have been developed around it for the synthesis of various vital scaffolds. The synthetic utility of this strategy was enhanced by replacing the customary allyl acetates with ethylene diacetates/dicarbonates, vinyl epoxides, vinyl oxetanes, vinyl ethylene carbonates, vinyl cyclopropanes, enynes, and dienes using transition-metal catalysis. One more milestone was achieved when metallaphotocatalysis provided the necessary platform for these cascades by using a cheaper metal. This review will provide a summary of these enantioselective catalytic cascades from 2015.
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Affiliation(s)
- Santosh Kumar Nanda
- Department of Chemistry, School of Applied Science, Centurion University, Bhubaneswar, Odisha, 752050, India.
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20
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Wang YL, Lei XX, Jin XC, Zhang XY, Xu PF, Luo YC. Sc(OTf) 3 catalyzed intramolecular single-electron transfer of 2-alkyl-1,4-benzoquinones: synthesis of 6-chromanols from donor-acceptor cyclopropanes. Chem Commun (Camb) 2023; 59:11385-11388. [PMID: 37667576 DOI: 10.1039/d3cc02988c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/06/2023]
Abstract
A Sc(OTf)3 catalyzed intramolecular cyclization reaction of 2-alkyl-1,4-benzoquinone derived from D-A cyclopropane was discovered. This reaction involves single-electron transfer, proton-transfer, an aromatization driven spin center shift, and radical coupling processes, and offers an efficient method for the synthesis of 6-chromanols from D-A cyclopropanes.
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Affiliation(s)
- Yi-Lin Wang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, College of Veterinary Medicine, Lanzhou University, Lanzhou, 730000, P. R. China.
| | - Xin-Xin Lei
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, College of Veterinary Medicine, Lanzhou University, Lanzhou, 730000, P. R. China.
| | - Xin-Chen Jin
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, College of Veterinary Medicine, Lanzhou University, Lanzhou, 730000, P. R. China.
| | - Xin-Yu Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, College of Veterinary Medicine, Lanzhou University, Lanzhou, 730000, P. R. China.
| | - Peng-Fei Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, College of Veterinary Medicine, Lanzhou University, Lanzhou, 730000, P. R. China.
- State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730000, P. R. China
| | - Yong-Chun Luo
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, College of Veterinary Medicine, Lanzhou University, Lanzhou, 730000, P. R. China.
- State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730000, P. R. China
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21
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Ma HJ, Gao K, Wang XL, Zeng JY, Yang Y, Jiang Y. AlCl 3-mediated ring-opening reactions of indoline-2-thiones with acyl cyclopropanes, bi-cyclopropanes and spirocyclic cyclopropanes. Org Biomol Chem 2023; 21:6312-6316. [PMID: 37493459 DOI: 10.1039/d3ob00909b] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/27/2023]
Abstract
AlCl3-mediated nucleophilic ring-opening reactions of indoline-2-thiones with various acyl cyclopropanes, bi-cyclopropanes and spirocyclic cyclopropanes were investigated. A series of ketones functionalized with indolylthio groups were synthesized in yields ranging from moderate to good. Moreover, chemical transformations of 4-indolylthio butan-1-ones to dihydro-2H-thiepino[2,3-b]indoles and sulfone were carried out to further expand both synthetic utility and structural complexity.
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Affiliation(s)
- Hao-Jie Ma
- School of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China.
| | - Ke Gao
- School of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China.
| | - Xue-Long Wang
- School of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China.
| | - Jun-Yi Zeng
- School of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China.
| | - Yi Yang
- School of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China.
| | - Yan Jiang
- School of Chemistry and Environmental Engineering, Sichuan University of Science & Engineering, Zigong 643000, China.
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22
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Beļaunieks R, Puriņš M, Līpiņa RA, Mishnev A, Turks M. 1,3-Difunctionalization of Propargyl Silanes with Concomitant 1,2-Silyl Shift: Synthesis of Allyl Functionalized Vinyl Silanes. Org Lett 2023. [PMID: 37318959 DOI: 10.1021/acs.orglett.3c01245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Terminal alkynes with a silyl group at the propargylic position upon activation with electrophiles such as N-bromosuccinimide undergo (E)-selective 1,2-silyl group migration. Subsequently, an allyl cation is formed that is intercepted by an external nucleophile. This approach provides allyl ethers and esters with stereochemically defined vinyl halide and silane handles for further functionalization. The scope of propargyl silanes and electrophile-nucleophile pairs are investigated, and various trisubstituted olefins are prepared in up to 78% yield. The obtained products have been demonstrated to serve as building blocks for transition-metal-catalyzed cross-couplings of vinyl halides, silicon-halogen exchange, and allyl acetate functionalization reactions.
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Affiliation(s)
- Rūdolfs Beļaunieks
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Paula Valdena str. 3, Riga LV-1048, Latvia
| | - Mikus Puriņš
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Paula Valdena str. 3, Riga LV-1048, Latvia
| | - Rebeka Anna Līpiņa
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Paula Valdena str. 3, Riga LV-1048, Latvia
| | - Anatoly Mishnev
- Latvian Institute of Organic Synthesis, Aizkraukles 21, Riga LV-1006, Latvia
| | - Māris Turks
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Paula Valdena str. 3, Riga LV-1048, Latvia
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23
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Kim MJ, Wang DJ, Targos K, Garcia UA, Harris AF, Guzei IA, Wickens ZK. Diastereoselective Synthesis of Cyclopropanes from Carbon Pronucleophiles and Alkenes. Angew Chem Int Ed Engl 2023; 62:e202303032. [PMID: 36929023 PMCID: PMC10189787 DOI: 10.1002/anie.202303032] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/13/2023] [Accepted: 03/15/2023] [Indexed: 03/18/2023]
Abstract
Cyclopropanes are desirable structural motifs with valuable applications in drug discovery and beyond. Established alkene cyclopropanation methods give rise to cyclopropanes with a limited array of substituents, are difficult to scale, or both. Herein, we disclose a new cyclopropane synthesis through the formal coupling of abundant carbon pronucleophiles and unactivated alkenes. This strategy exploits dicationic adducts derived from electrolysis of thianthrene in the presence of alkene substrates. We find that these dielectrophiles undergo cyclopropanation with methylene pronucleophiles via alkenyl thianthrenium intermediates. This protocol is scalable, proceeds with high diastereoselectivity, and tolerates diverse functional groups on both the alkene and pronucleophile coupling partners. To validate the utility of this new procedure, we prepared an array of substituted analogs of an established cyclopropane that is en route to multiple pharmaceuticals.
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Affiliation(s)
- Min Ji Kim
- Department of Chemistry, University of Wisconsin–Madison, Madison, Wisconsin, 53706, United States
| | - Diana J. Wang
- Department of Chemistry, University of Wisconsin–Madison, Madison, Wisconsin, 53706, United States
| | - Karina Targos
- Department of Chemistry, University of Wisconsin–Madison, Madison, Wisconsin, 53706, United States
| | - Uriel A. Garcia
- Department of Chemistry, University of Wisconsin–Madison, Madison, Wisconsin, 53706, United States
| | - Alison F. Harris
- Department of Chemistry, University of Wisconsin–Madison, Madison, Wisconsin, 53706, United States
| | - Ilia A. Guzei
- Department of Chemistry, University of Wisconsin–Madison, Madison, Wisconsin, 53706, United States
| | - Zachary K. Wickens
- Department of Chemistry, University of Wisconsin–Madison, Madison, Wisconsin, 53706, United States
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24
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Abstract
Cyclopropanes that carry an electron-accepting group react as electrophiles in polar, ring-opening reactions. Analogous reactions at cyclopropanes with additional C2 substituents allow one to access difunctionalized products. Consequently, functionalized cyclopropanes are frequently used building blocks in organic synthesis. The polarization of the C1-C2 bond in 1-acceptor-2-donor-substituted cyclopropanes not only favorably enhances reactivity toward nucleophiles but also directs the nucleophilic attack toward the already substituted C2 position. Monitoring the kinetics of non-catalytic ring-opening reactions with a series of thiophenolates and other strong nucleophiles, such as azide ions, in DMSO provided the inherent SN2 reactivity of electrophilic cyclopropanes. The experimentally determined second-order rate constants k 2 for cyclopropane ring-opening reactions were then compared to those of related Michael additions. Interestingly, cyclopropanes with aryl substituents at the C2 position reacted faster than their unsubstituted analogues. Variation of the electronic properties of the aryl groups at C2 gave rise to parabolic Hammett relationships.
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Affiliation(s)
- Andreas Eitzinger
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstr. 5–13, 81377München, Germany
| | - Armin R. Ofial
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstr. 5–13, 81377München, Germany
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25
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Biswas K, Khamrai A, Malik S, Ganesh V. Organophosphorus-Catalyzed Borylative Ring-Opening of Vinylcyclopropanes: A Stereoselective Route to δ-Valerolactones. Org Lett 2023; 25:1805-1810. [PMID: 36919935 DOI: 10.1021/acs.orglett.2c04284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Abstract
We report an operationally simple route to δ-valerolactones through an organophosphorus-catalyzed borylative ring-opening/allylation of vinylcyclopropanes providing δ-hydroxy esters stereoselectively. The δ-hydroxy esters were lactonized to obtain densely substituted δ-valerolactones. The present methodology exhibited enhanced functional group tolerance compared to the existing metal-mediated methods. A plausible mechanism for borylative ring-opening reaction has been suggested. 31P NMR studies indicated the involvement of a phosphonium zwitterionic species. The synthetic utility of the intermediate allyl boronates was demonstrated.
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Affiliation(s)
- Krishna Biswas
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal-721302, India
| | - Aankhi Khamrai
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal-721302, India
| | - Subrata Malik
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal-721302, India
| | - Venkataraman Ganesh
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal-721302, India
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26
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Shorokhov VV, Lebedev DS, Boichenko MA, Zhokhov SS, Trushkov IV, Ivanova OA. A simple method for the synthesis of isoindoline derivatives. Chem Heterocycl Compd (N Y) 2023. [DOI: 10.1007/s10593-023-03162-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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27
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Synthesis of 2-[2-(Ethoxymethoxy)phenyl]spiro[cyclopropane-1,2′-indene]-1′,3′-dione. MOLBANK 2023. [DOI: 10.3390/m1604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/15/2023] Open
Abstract
An 1,3-indanedione-derived donor–acceptor cyclopropane, bearing the ethoxymethyl-protected phenolic group at the ortho-position of the donor aryl substituent, has been synthesized using a reaction sequence involving the Knoevenagel condensation of 1,3-indanedione with the corresponding protected salicylaldehyde followed by the Corey–Chaykovsky cyclopropanation of the obtained adduct with dimethylsulfoxonium methylide. The structure of the synthesized cyclopropane was unambiguously proved by single-crystal X-ray diffraction data.
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28
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Prakash M, Samanta S. Base-promoted cyclization of ortho-hydroxyacetophenones with in situ generated cyclopropenes: diastereoselective access to spirobenzo[ b]oxepines and related precursors. Org Biomol Chem 2023; 21:2001-2014. [PMID: 36789745 DOI: 10.1039/d3ob00077j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
An unprecedented [5 + 2] spirocyclization route to obtain a vital class of functionalized spirobenzo[b]oxepine-cyclopropanes in good to high yields with excellent diastereoselectivities is reported. This domino reaction proceeds through a regioselective oxa-Michael addition of ortho-hydroxyacetophenones as 1,5-binucleophiles to in situ produced highly reactive cyclopropenes from 2-aroyl-1-chlorocyclopropanecarboxylates triggered by Cs2CO3 and the subsequent intramolecular aldol reaction under heating conditions, enabling the formation of new C-O and C-C bonds for benzo[b]oxepine ring synthesis. Moreover, at ambient temperature, the above C-O/C-C bond-forming event takes place preferentially via a [4 + 2] annulation path over a spirocyclization route, leading to substituted fused-cyclopropanes with good diastereoselectivities. Gratifyingly, further alterations of the obtained spirobenzo[b]oxepines and tetrahydrocyclopropa[b]chromenes afford fascinating classes of 4H-chromen-4-ones and cyclopenta[c]chromenes, respectively, under metal-free conditions.
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Affiliation(s)
- Meher Prakash
- Indian Institute of Technology Indore, Discipline of Chemistry, 453552, Indore, India.
| | - Sampak Samanta
- Indian Institute of Technology Indore, Discipline of Chemistry, 453552, Indore, India.
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29
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Zhang D, Chen L, Deng H, Zhang Y, Cheng Q, Zhang QF. Asymmetric ring-opening reactions of donor-acceptor cyclopropanes with 1,3-cyclodiones. RSC Adv 2023; 13:7432-7435. [PMID: 36895764 PMCID: PMC9990749 DOI: 10.1039/d2ra08257h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Accepted: 02/24/2023] [Indexed: 03/09/2023] Open
Abstract
Asymmetric ring-opening reactions of donor-acceptor cyclopropanes with 1,3-cyclodiones have been established for the synthesis of enantioenriched γ-hydroxybutyric acid derivatives in the presence of Cu(ii)/trisoxazoline catalyst. These reactions offered the desired products in 70% to 93% yields with 79% to 99% enantiomeric excesses.
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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 243002 China
| | - Lvjia Chen
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology No. 59 Hudong Road Ma'anshan 243002 China
| | - Huiqing Deng
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology No. 59 Hudong Road Ma'anshan 243002 China
| | - Ying Zhang
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology No. 59 Hudong Road Ma'anshan 243002 China
| | - Qihang Cheng
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology No. 59 Hudong Road Ma'anshan 243002 China
| | - Qian-Feng Zhang
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology No. 59 Hudong Road Ma'anshan 243002 China
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30
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Bao M, Lopez K, Gurung R, Arman H, Doyle MP. Stereoretentive Catalytic [3+2]-Cycloaddition/Rearrangement/Decarboxylation Reactions of Indoles with Non-Racemic Donor–Acceptor Cyclopropanes. ACS Catal 2023. [DOI: 10.1021/acscatal.2c05930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Ming Bao
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle, San Antonio, Texas 78249, United States
| | - Karlos Lopez
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle, San Antonio, Texas 78249, United States
| | - Raj Gurung
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle, San Antonio, Texas 78249, United States
| | - Hadi Arman
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle, San Antonio, Texas 78249, United States
| | - Michael P. Doyle
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle, San Antonio, Texas 78249, United States
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31
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Gopal B, Singh PR, Kumar M, Goswami A. Synthesis of Indole-Fused Dihydrothiopyrano Scaffolds via (3 + 3)-Annulations of Donor-Acceptor Cyclopropanes with Indoline-2-Thiones. J Org Chem 2023; 88:132-142. [PMID: 36524970 DOI: 10.1021/acs.joc.2c01990] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A new methodology for the synthesis of N-haloindole-fused dihydrothiopyrano derivatives via (3 + 3)-annulation of donor-acceptor cyclopropanes (DACs) with indoline-2-thiones in the presence of Sc(OTf)3 as a Lewis acid catalyst has been developed. This protocol provides a variety of indole-fused dihydrothiopyrano molecules in good to excellent yields, which architecturally resemble other indole-fused tricyclic molecules having potential medicinal value. In addition, we have described a detailed reaction mechanism and transformation of the furnished product into N-fused thiazino indole molecule.
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Affiliation(s)
- Braj Gopal
- Department of Chemistry, Indian Institute of Technology Ropar, SS Bhatnagar Block, Main Campus, Rupnagar, Punjab 140001, India
| | - Prasoon Raj Singh
- Department of Chemistry, Indian Institute of Technology Ropar, SS Bhatnagar Block, Main Campus, Rupnagar, Punjab 140001, India
| | - Madan Kumar
- Department of Chemistry, Indian Institute of Technology Ropar, SS Bhatnagar Block, Main Campus, Rupnagar, Punjab 140001, India
| | - Avijit Goswami
- Department of Chemistry, Indian Institute of Technology Ropar, SS Bhatnagar Block, Main Campus, Rupnagar, Punjab 140001, India
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32
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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: 11] [Impact Index Per Article: 11.0] [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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33
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Boichenko MA, Plodukhin AY, Shorokhov VV, Lebedev DS, Filippova AV, Zhokhov SS, Tarasenko EA, Rybakov VB, Trushkov IV, Ivanova OA. Synthesis of 1,5-Substituted Pyrrolidin-2-ones from Donor-Acceptor Cyclopropanes and Anilines/Benzylamines. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27238468. [PMID: 36500574 PMCID: PMC9735934 DOI: 10.3390/molecules27238468] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 11/16/2022] [Accepted: 11/23/2022] [Indexed: 12/12/2022]
Abstract
We developed a straightforward synthetic route to pharmacologically important 1,5-substituted pyrrolidin-2-ones from donor-acceptor cyclopropanes bearing an ester group as one of the acceptor substituents. This method includes a Lewis acid-catalyzed opening of the donor-acceptor cyclopropane with primary amines (anilines, benzylamines, etc.) to γ-amino esters, followed by in situ lactamization and dealkoxycarbonylation. The reaction has a broad scope of applicability; a variety of substituted anilines, benzylamines, and other primary amines as well as a wide range of donor-acceptor cyclopropanes bearing (hetero)aromatic or alkenyl donor groups and various acceptor substituents can be involved in this transformation. In this process, donor-acceptor cyclopropanes react as 1,4-C,C-dielectrophiles, and amines react as 1,1-dinucleophiles. The resulting di- and trisubstituted pyrrolidin-2-ones can be also used in subsequent chemistry to obtain various nitrogen-containing polycyclic compounds of interest to medicinal chemistry and pharmacology, such as benz[g]indolizidine derivatives.
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Affiliation(s)
- Maksim A. Boichenko
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1-3, 119991 Moscow, Russia
| | - Andrey Yu. Plodukhin
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1-3, 119991 Moscow, Russia
| | - Vitaly V. Shorokhov
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1-3, 119991 Moscow, Russia
| | - Danyla S. Lebedev
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1-3, 119991 Moscow, Russia
| | - Anastasya V. Filippova
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1-3, 119991 Moscow, Russia
| | - Sergey S. Zhokhov
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1-3, 119991 Moscow, Russia
| | - Elena A. Tarasenko
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1-3, 119991 Moscow, Russia
| | - Victor B. Rybakov
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1-3, 119991 Moscow, Russia
| | - Igor V. Trushkov
- N. D. Zelinsky Institute of Organic Chemistry, Leninsky Pr. 47, 119334 Moscow, Russia
- Correspondence: (I.V.T.); (O.A.I.); Tel.: +7-916-645-9951 (I.V.T.)
| | - Olga A. Ivanova
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1-3, 119991 Moscow, Russia
- Correspondence: (I.V.T.); (O.A.I.); Tel.: +7-916-645-9951 (I.V.T.)
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34
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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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35
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Ring expansion of donor—acceptor cyclopropanes bearing arylcarbamoyl group into 1,5-diarylpyrrolidin-2-ones. Russ Chem Bull 2022. [DOI: 10.1007/s11172-022-3671-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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36
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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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37
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Hao ZF, Zhu SJ, Hao YJ, Zhang WH, Zhou Y, Tian YP, Lei CW. Enantioselective Synthesis of Bispiro[indanedione-oxindole-cyclopropane]s through Organocatalytic [2+1] Cycloaddition. J Org Chem 2022. [PMID: 35960861 DOI: 10.1021/acs.joc.2c01009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A series of compounds featuring a novel bispiro[indanedione-oxindole-cyclopropane] moiety have been synthesized through a squaramide-catalyzed [2+1] cycloaddition reaction. The tandem Michael-alkylation reaction of 2-arylidene-1,3-indanediones with 3-bromooxindoles furnished the cycloadducts in high yields with excellent diastereo- and enantioselectivities. The ammonium ylide in the catalytic process, as a key intermediate, was revealed by the high-resolution mass spectrometry study.
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Affiliation(s)
- Zhi-Feng Hao
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China
| | - Shi-Jie Zhu
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China
| | - Yong-Jia Hao
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China
| | - Wen-Hui Zhang
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China
| | - Ying Zhou
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China
| | - You-Ping Tian
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China
| | - Chuan-Wen Lei
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China
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38
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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: 8] [Impact Index Per Article: 4.0] [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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39
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Joshi DR, Kim I. Regioselective Synthesis of 1‐Cyano‐3‐arylindolizines: Construction of Pyrrole via DDQ‐Mediated Ring Closure of Cyclopropyl Pyridines. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Ikyon Kim
- Yonsei University KOREA (THE REPUBLIC OF)
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40
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McLeod DA, Thøgersen MK, Barløse CL, Skipper ML, Obregón EB, Jørgensen KA. Enantioselective (8+3) Cycloadditions by Activation of Donor-Acceptor Cyclopropanes Employing Chiral Brønsted Base Catalysis. Angew Chem Int Ed Engl 2022; 61:e202206096. [PMID: 35580010 PMCID: PMC9401081 DOI: 10.1002/anie.202206096] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Indexed: 12/18/2022]
Abstract
A novel enantioselective (8+3) cycloaddition between donor-acceptor cyclopropanes and heptafulvenoids catalysed by a chiral bifunctional Brønsted base is described. Importantly, the reaction, which leverages an anionic activation strategy, is divergent from prototypical Lewis-acid activation protocols. A series of cyclopropylketones react with tropones affording the desired (8+3) cycloadducts in high yield and enantiomeric excess. For barbiturate substituted heptafulvenes, the (8+3) cycloaddition with cyclopropylketones proceeds in good yield, excellent diastereoselectivity and high enantiomeric excess. The experimental work is supported by DFT calculations, which indicate that the bifunctional organocatalyst activates both the donor-acceptor cyclopropane and tropone; the reaction proceeds in a step-wise manner with the ring-closure being the stereodetermining step.
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41
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Singh PR, Gopal B, Kumar M, Goswami A. A metal-free BF 3·OEt 2 mediated chemoselective protocol for the synthesis of propargylic cyclic imines. Org Biomol Chem 2022; 20:4933-4941. [PMID: 35648486 DOI: 10.1039/d2ob00530a] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A chemoselective and metal/additive-free protocol for the synthesis of propargylic cyclic imine derivatives via (3 + 2)-cycloaddition of donor-acceptor cyclopropanes and alkynylnitriles in the presence of BF3·OEt2 has been established. The newly developed methodology provided access to a variety of propargylic cyclic imines in good to excellent yields. In addition, the synthesis of propargylic amines and the corresponding very stable enol derivatives from the title compound is also explored.
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Affiliation(s)
- Prasoon Raj Singh
- Department of Chemistry, Indian Institute of Technology Ropar, SS Bhatnagar Block, Main Campus, Rupnagar, Punjab-140001, India.
| | - Braj Gopal
- Department of Chemistry, Indian Institute of Technology Ropar, SS Bhatnagar Block, Main Campus, Rupnagar, Punjab-140001, India.
| | - Madan Kumar
- Department of Chemistry, Indian Institute of Technology Ropar, SS Bhatnagar Block, Main Campus, Rupnagar, Punjab-140001, India.
| | - Avijit Goswami
- Department of Chemistry, Indian Institute of Technology Ropar, SS Bhatnagar Block, Main Campus, Rupnagar, Punjab-140001, India.
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42
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Andreev I, Boichenko M, Ratmanova N, Ivanova O, Levina I, Khrustalev V, Sedov I, Trushkov I. 4‐(Dimethylamino)pyridinium Azide in Protic Ionic Liquid Media as a Stable Equivalent of Hydrazoic Acid. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200486] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ivan Andreev
- Dmitry Rogachev National Medical Research Center of Pediatric Hematology Oncology and Immunology RUSSIAN FEDERATION
| | - Maksim Boichenko
- Lomonosov Moscow State University Department of Chemistry RUSSIAN FEDERATION
| | - Nina Ratmanova
- Dmitry Rogachev National Medical Research Center of Pediatric Hematology Oncology and Immunology RUSSIAN FEDERATION
| | | | - Irina Levina
- FSBSI Institute of Biochemical Physics named after N M Emanuel of the Russian Academy of Sciences RUSSIAN FEDERATION
| | | | - Igor Sedov
- Kazan Federal University RUSSIAN FEDERATION
| | - Igor Trushkov
- N.D. Zelinsky Institute of Organic Chemistry RUSSIAN FEDERATION
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43
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Güven Z, Denker L, Dolati H, Wullschläger D, Trzaskowski B, Frank R. Reactions of a Four‐Membered Borete with Carbon, Silicon, and Gallium Donor Ligands: Fused and Spiro‐Type Boracycles. Chemistry 2022; 28:e202200673. [PMID: 35362629 PMCID: PMC9322404 DOI: 10.1002/chem.202200673] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Indexed: 12/27/2022]
Abstract
Donor‐acceptor cyclopropanes or cyclobutanes are dipolar reagents, which are widely used in the synthesis of complex organic (hetero)cycles in ring expansion reactions. Applying this concept to boron containing heterocycles, the four‐membered borete cyclo‐iPr2N‐BC10H6 reacted with the carbon donor ligands 2,6‐xylylisonitrile and the carbene IMes :C(NMesCH)2 with ring expansion and ring fusion, respectively. In particular, the tetracyclic structure formed with IMes displays zwitterionic character and absorption in the visible region. In contrast to the carbene IMes, the heavier carbenoids :Si(NDippCH)2 and :Ga(AmIm) with a two‐coordinate donor atom afford spiro‐type bicyclic compounds, which display four‐coordinate geometry at silicon or gallium. (TD‐)DFT calculations provide deeper insight into the mechanism of formation and the absorption properties of these new compounds.
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Affiliation(s)
- Zeynep Güven
- Department of Inorganic and Analytical Chemistry Technische Universität Braunschweig Hagenring 30 38106 Braunschweig Germany
| | - Lars Denker
- Department of Inorganic and Analytical Chemistry Technische Universität Braunschweig Hagenring 30 38106 Braunschweig Germany
| | - Hadi Dolati
- Department of Inorganic and Analytical Chemistry Technische Universität Braunschweig Hagenring 30 38106 Braunschweig Germany
| | - Daniela Wullschläger
- Department of Inorganic and Analytical Chemistry Technische Universität Braunschweig Hagenring 30 38106 Braunschweig Germany
| | - Bartosz Trzaskowski
- Centre of New Technologies University of Warsaw Banacha 2 C 02-097 Warszawa Poland
| | - René Frank
- Department of Inorganic and Analytical Chemistry Technische Universität Braunschweig Hagenring 30 38106 Braunschweig Germany
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44
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Nakada M. Research on the Efficient Enantioselective Total Synthesis of Useful Bioactive Polycyclic Compounds. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2022. [DOI: 10.1246/bcsj.20210329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Masahisa Nakada
- Department of Chemistry and Biochemistry, Graduate School of Advanced Science and Engineering, Waseda University, 3-4-1, Okubo, Shinjuku-ku, Tokyo 119-8555
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45
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McLeod DA, Thøgersen MK, Barløse CL, Skipper ML, Obregón EB, Jørgensen KA. Enantioselective (8+3) Cycloadditions by Activation of Donor–Acceptor Cyclopropanes Employing Chiral Brønsted Base Catalysis. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202206096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- David A. McLeod
- Department of Chemistry Aarhus University 8000 Aarhus C Denmark
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46
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More SG, Suryavanshi G. Lewis acid triggered N-alkylation of sulfoximines through nucleophilic ring-opening of donor-acceptor cyclopropanes: synthesis of γ-sulfoximino malonic diesters. Org Biomol Chem 2022; 20:2518-2529. [PMID: 35266938 DOI: 10.1039/d2ob00213b] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Scandium triflate (Sc(OTf)3) catalyzed, mild, and regioselective ring-opening reaction of donor-acceptor (D-A) cyclopropanes has been developed using sulfoximines for the synthesis of γ-sulfoximino malonic diesters. This protocol allows the synthesis of different N-alkyl sulfoximines in good to excellent yields (up to 94%) with broad functional group tolerance. In this process, N-H and C-C bonds are cleaved to form new C-N and C-H bonds. The feasibility of this method is supported by a gram-scale reaction and synthetic elaboration of the obtained product.
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Affiliation(s)
- Satish G More
- Chemical Engineering and Process Development Division, CSIR-National Chemical Laboratory, Pune, 411 008, India. .,Academy of Scientific and Innovative Research, Ghaziabad, Uttar Pradesh, 201 002, India
| | - Gurunath Suryavanshi
- Chemical Engineering and Process Development Division, CSIR-National Chemical Laboratory, Pune, 411 008, India. .,Academy of Scientific and Innovative Research, Ghaziabad, Uttar Pradesh, 201 002, India
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47
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Corey‐Сhaykovsky cyclopropanation of dehydroalanine in the Ni(II) coordination environment: Electrochemical vs. chemical activation. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.139980] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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48
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Liu SL, Chen QW, Zhang ZW, Chen Q, Wei LQ, Lin N. Efficient heterogeneous catalyst of Fe(II)-based coordination complexes for Friedel-Crafts alkylation reaction. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123045] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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49
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Zhou A, Shao Y, Chen F, Qian PC, Cheng J. The copper-catalyzed ring-opening reactions of cyclopropanes by N-fluorobenzenesulfonimide toward N-allylsulfonamides. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2021.153597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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50
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Bunyamin A, Hua C, Polyzos A, Priebbenow DL. Intramolecular Photochemical [2+1]-Cycloadditions of Nucleophilic Siloxy Carbenes. Chem Sci 2022; 13:3273-3280. [PMID: 35414869 PMCID: PMC8926286 DOI: 10.1039/d2sc00203e] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 02/24/2022] [Indexed: 11/21/2022] Open
Abstract
Visible light induced singlet nucleophilic carbenes undergo rapid [2 + 1]-cycloaddition with tethered olefins to afford unique bicyclo[3.1.0]hexane and bicyclo[4.1.0]heptane scaffolds. This cyclopropanation process requires only visible light irradiation to proceed, circumventing the use of exogenous (photo)catalysts, sensitisers or additives and showcases a vastly underexplored mode of reactivity for nucleophilic carbenes in chemical synthesis. The discovery of additional transformations including a cyclopropanation/retro-Michael/Michael cascade process to afford chromanones and a photochemical C–H insertion reaction are also described. Visible light induced singlet nucleophilic carbenes undergo rapid [2 + 1]-cycloaddition with tethered olefins to afford unique bicyclo[3.1.0]hexane and bicyclo[4.1.0]heptane scaffolds.![]()
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Affiliation(s)
- Amanda Bunyamin
- School of Chemistry, University of Melbourne Parkville Victoria 3010 Australia
| | - Carol Hua
- School of Chemistry, University of Melbourne Parkville Victoria 3010 Australia
- School of Life and Environmental Sciences, Deakin University Waurn Ponds Victoria 3216 Australia
| | - Anastasios Polyzos
- School of Chemistry, University of Melbourne Parkville Victoria 3010 Australia
- CSIRO Manufacturing Clayton Victoria 3168 Australia
| | - Daniel L Priebbenow
- School of Chemistry, University of Melbourne Parkville Victoria 3010 Australia
- Department of Medicinal Chemistry, Monash Institute of Pharmaceutical Science, Monash University Parkville Victoria 3052 Australia
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