1
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Gorad SS, Ghorai P. Organocatalytic Desymmetric Spirocyclization of Enone-Tethered 2,5-Cyclohexadienone with Isoxazolines to Access Enantioenriched Spiro-Fused Scaffolds. Org Lett 2024; 26:8780-8785. [PMID: 39374377 DOI: 10.1021/acs.orglett.4c03103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/09/2024]
Abstract
Enantioselective desymmetric spirocyclization is a powerful tool for concisely generating intricate 3D molecular architectures from readily accessible substrates. Herein, we report an organocatalytic desymmetric spirocyclization of enone-tethered 2,5-cyclohexadienone with 3-arylisoxazol-5(4H)-one to access enantioenriched spiro-fused scaffolds featuring four consecutive stereogenic centers in high yields and excellent diastereo- and enantioselectivities. This protocol could proceed smoothly under parts per million-level organocatalyst loading. Furthermore, the reusability of the catalyst and various intriguing derivatizations of the title product highlight its synthetic utility.
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Affiliation(s)
- Sachin S Gorad
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal By-pass Road, Bhauri, Bhopal-462066, India
| | - Prasanta Ghorai
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Bhopal, Bhopal By-pass Road, Bhauri, Bhopal-462066, India
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2
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Furuya S, Muroi K, Kanemoto K, Fukuzawa SI. Dipolarophile-Steered Formal Stereodivergent Synthesis of 2,5-cis/trans-Pyrrolidines Based on Asymmetric 1,3-Dipolar Cycloaddition of Imino Lactones. Chemistry 2023; 29:e202302609. [PMID: 37694523 DOI: 10.1002/chem.202302609] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 09/11/2023] [Accepted: 09/11/2023] [Indexed: 09/12/2023]
Abstract
The stereodivergent asymmetric synthesis of 2,5-trans/cis pyrrolidines by 1,3-dipolar cycloaddition using two different types of activated alkenes is described. When ylidene-isoxazolones were employed as dipolarophiles, the Ag/(S,Sp )-iPr-FcPHOX-catalyzed asymmetric [3+2] cycloaddition of imino lactones proceeded with 2,5-trans selectivity. Subsequent decarboxylation of the isoxazolone rings produced pyrrolidines with 2,5-trans stereoretention. In the reaction using acyclic enones as activated alkenes, the Ag/(R,Sp )-ThioClickFerrophos complex-catalyzed asymmetric [3+2] cycloaddition afforded 2,5-cis substituted pyrrolidines in high yields and enantioselectivities. Therefore, these methods can be considered as a formal stereodivergent synthesis of 2,5-cis/trans pyrrolidines.
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Affiliation(s)
- Shohei Furuya
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo, 112-8551, Japan
| | - Kenji Muroi
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo, 112-8551, Japan
| | - Kazuya Kanemoto
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo, 112-8551, Japan
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
| | - Shin-Ichi Fukuzawa
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo, 112-8551, Japan
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3
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Sarma MJ, Sudarshana KA, Pabbaraja S, Mehta G. Diversified Stitching of Ynones with Oxindole-3-oxy acrylates: One-Flask Spiro-annulation Protocol toward Assorted 3 H/5 H-Spiro[furan-2,3'-indolin]-2'-ones. J Org Chem 2023; 88:12131-12140. [PMID: 37503726 DOI: 10.1021/acs.joc.3c01279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
Spiroannulation of oxindole-3-oxy acrylates with ynones involving two overlapping, base differentiated cascades has been observed. Initial exposure of ynones and oxindole 3-oxy acrylates to K2CO3 triggered a tandem Michael-Michael cascade to deliver a pair of spiroannulated diastereomers. Further exposure to LiHMDS led to deep restructuring through a second multistep cascade involving stereoselective recreation of the C3 quaternary center to furnish 3H-spiro[furan-2,3'-indolin]-2'-ones with functional amplification and scrambling. This new scaffold can be directly accessed in a one-flask operation from ynones and oxindole-3-oxy acrylates.
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Affiliation(s)
- Manas Jyoti Sarma
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - K A Sudarshana
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Srihari Pabbaraja
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Goverdhan Mehta
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
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4
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McArthur G, Abel S, Volpin G, Barber DM. Strategies for the Enantioselective Synthesis of 2‐Isoxazolines and 2‐Isoxazolin‐5‐ones Bearing Fully Substituted Stereocenters**. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Affiliation(s)
- Gillian McArthur
- Research and Development, Weed Control Chemistry, Bayer AG, Crop Science Division Industriepark Höchst 65926 Frankfurt am Main Germany
| | - Steven Abel
- Research and Development, Weed Control Chemistry, Bayer AG, Crop Science Division Industriepark Höchst 65926 Frankfurt am Main Germany
| | - Giulio Volpin
- Research and Development, Small Molecules Technologies, Process Research, Bayer AG, Crop Science Division Industriepark Höchst 65926 Frankfurt am Main Germany
| | - David M. Barber
- Research and Development, Weed Control Chemistry, Bayer AG, Crop Science Division Industriepark Höchst 65926 Frankfurt am Main Germany
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5
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Ganesh M, Suraj S. Expeditious entry into carbocyclic and heterocyclic spirooxindoles. Org Biomol Chem 2022; 20:5651-5693. [PMID: 35792116 DOI: 10.1039/d2ob00767c] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Spirocyclic frameworks have attracted synthetic practitioners due to their unique three-dimensional assembly, improved metabolic stability, solubility, and increased molecular complexity with regard to planar architectures. A recent surge in the number of spirocyclic oxindoles inhibiting enzymes, moderating unique protein-protein interactions, modulating receptors and transporters is testament to their prevalence. Against this background, the construction of spirocyclic frameworks containing an oxindole moiety as a torsional switch via stereoselective methods is in great demand. Herein we present a summary of the past three years in the progress of metal, organic molecule, nanostructured particle mediated, and even uncatalyzed versions of the highly diastereo- and enantioselective pathways leading to oxindole spirocycles.
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Affiliation(s)
- Madhu Ganesh
- Sudhanva Technologies Private Limited, No. 7, Weavers Colony, Basavanapura, Bengaluru, Karnataka 560083, India.
| | - Shammy Suraj
- Department of Chemistry, Indian Institute of Technology, Powai, Mumbai, Maharashtra 400076, India
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6
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Li TH, Niu C, Du DM. Enantioselective synthesis of isoxazole-containing spirooxindole tetrahydroquinolines via squaramide-catalysed cascade reactions. Org Biomol Chem 2022; 20:5582-5588. [PMID: 35796306 DOI: 10.1039/d2ob00864e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A class of o-sulfonylaminostyryl isoxazole synthons were designed and demonstrated to be useful building blocks in asymmetric cascade aza-Michael/Michael reaction with 3-olefinic oxindoles. This squaramide-catalysed cascade reaction afforded structurally complex isoxazole-containing spirooxindole tetrahydroquinolines bearing three contiguous stereocenters in good to excellent yields (up to 99%) with high diastereoselectivities (up to >20 : 1 dr) and enantioselectivities (up to 88% ee). Moreover, the gram-scale synthesis and synthetic transformations were also demonstrated.
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Affiliation(s)
- Tong-Hao Li
- Key Laboratory of Medical Molecule Science & Pharmaceutics Engineering (Ministry of Industry and Information Technology), School of Chemistry and Chemical Engineering, Beijing Institute of Technology, No.5 Zhongguancun South Street, Beijing 100081, People's Republic of China..
| | - Cheng Niu
- Key Laboratory of Medical Molecule Science & Pharmaceutics Engineering (Ministry of Industry and Information Technology), School of Chemistry and Chemical Engineering, Beijing Institute of Technology, No.5 Zhongguancun South Street, Beijing 100081, People's Republic of China..
| | - Da-Ming Du
- Key Laboratory of Medical Molecule Science & Pharmaceutics Engineering (Ministry of Industry and Information Technology), School of Chemistry and Chemical Engineering, Beijing Institute of Technology, No.5 Zhongguancun South Street, Beijing 100081, People's Republic of China..
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7
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Faramarzi Z, Kiyani H. Steglich’s Base Catalyzed Three-Component Synthesis of Isoxazol-5-Ones. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2022.2061533] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
| | - Hamzeh Kiyani
- School of Chemistry, Damghan University, Damghan, Iran
- Department of Chemistry, Faculty of Science, Shahrekord University, Shahrekord, Iran
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8
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Zhong X, Lin S, Xu H, Zhao X, Gao H, Wei Y, Zhou Z. Rh(III)-Catalysed Cascade C-H Imidization/Cyclization of N-Methoxybenzamides with Isoxazolones for the Assembly of Dihydroquinazolin-4(1H)-one Derivatives. Org Chem Front 2022. [DOI: 10.1039/d1qo01935j] [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
By virtue of isoxazolones as viable imidizating reagents, an efficient Rh(III)-catalysed redox-neutral C-H imidization/cyclization cascade has been developed for the specific assembly of dihydroquinazolin-4(1H)-ones with the equipment of a quaternary...
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9
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Kadam HK, Salkar K, Naik AP, Naik MM, Salgaonkar LN, Charya L, Pinto KC, Mandrekar VK, Vaz T. Silica Supported Synthesis and Quorum Quenching Ability of Isoxazolones Against Both Gram Positive and Gram Negative Bacterial Pathogens. ChemistrySelect 2021. [DOI: 10.1002/slct.202101798] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Hari K. Kadam
- School of Chemical Sciences Goa University Taleigao Plateau Goa 403206 India
| | - Komal Salkar
- Department of Microbiology Goa University Taleigao Plateau Goa 403206 India
| | - Akshata P. Naik
- Post-graduate department of Chemistry St. Xavier's College Mapusa Goa 403507 India
| | - Milind M. Naik
- Department of Microbiology Goa University Taleigao Plateau Goa 403206 India
| | | | - Lakshangy Charya
- Department of Microbiology Goa University Taleigao Plateau Goa 403206 India
| | - Kathleen C. Pinto
- School of Chemical Sciences Goa University Taleigao Plateau Goa 403206 India
- Department of Chemistry St. Xavier's College Mapusa Goa 403507 India
| | - Vinod K. Mandrekar
- School of Chemical Sciences Goa University Taleigao Plateau Goa 403206 India
| | - Teotone Vaz
- Department of Chemistry St. Xavier's College Mapusa Goa 403507 India
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10
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Torán R, Miguélez R, Sanz‐Marco A, Vila C, Pedro JR, Blay G. Asymmetric Addition and Cycloaddition Reactions with Ylidene‐Five‐Membered Heterocycles. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100979] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Ricardo Torán
- Departament de Química Orgànica Universitat de València C/Dr. Moliner 50 46100- Burjassot (València) Spain
| | - Rubén Miguélez
- Departament de Química Orgànica Universitat de València C/Dr. Moliner 50 46100- Burjassot (València) Spain
| | - Amparo Sanz‐Marco
- Departament de Química Orgànica Universitat de València C/Dr. Moliner 50 46100- Burjassot (València) Spain
| | - Carlos Vila
- Departament de Química Orgànica Universitat de València C/Dr. Moliner 50 46100- Burjassot (València) Spain
| | - José R. Pedro
- Departament de Química Orgànica Universitat de València C/Dr. Moliner 50 46100- Burjassot (València) Spain
| | - Gonzalo Blay
- Departament de Química Orgànica Universitat de València C/Dr. Moliner 50 46100- Burjassot (València) Spain
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11
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Wang Y, Niu C, Xie DH, Du DM. A bifunctional squaramide-catalysed enantioselective vinylogous Michael addition/cyclization cascade reaction of 4-unsaturated isoxazol-5-ones and α,α-dicyanoalkenes. Org Biomol Chem 2021; 19:8572-8577. [PMID: 34549755 DOI: 10.1039/d1ob01256h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
An effective strategy for the stereoselective synthesis of spiro isoxazolone-cyclohexenimines was developed using a bifunctional squaramide-catalysed vinylogous Michael addition/cyclization cascade reaction of 4-unsaturated isoxazol-5-ones and α,α-dicyanoalkenes. The atom-economical cascade process can proceed smoothly under extremely low catalyst loading (1 mol%) and mild conditions, and the corresponding products were obtained in moderate to good yields (45% to 90%) and enantioselectivitites (51% to 96% ee). Meanwhile, the scale-up reaction and transformation of the products were also demonstrated.
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Affiliation(s)
- Yu Wang
- Key Laboratory of Medical Molecule Science & Pharmaceutics Engineering, Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Beijing 100081, People's Republic of China.
| | - Cheng Niu
- Key Laboratory of Medical Molecule Science & Pharmaceutics Engineering, Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Beijing 100081, People's Republic of China.
| | - Dong-Hua Xie
- Key Laboratory of Medical Molecule Science & Pharmaceutics Engineering, Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Beijing 100081, People's Republic of China.
| | - Da-Ming Du
- Key Laboratory of Medical Molecule Science & Pharmaceutics Engineering, Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 South Zhongguancun Street, Beijing 100081, People's Republic of China.
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12
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Abstract
Organocatalysts are abundantly used for various transformations, particularly to obtain highly enantio- and diastereomeric pure products by controlling the stereochemistry. These applications of organocatalysts have been the topic of several reviews. Organocatalysts have emerged as one of the very essential areas of research due to their mild reaction conditions, cost-effective nature, non-toxicity, and environmentally benign approach that obviates the need for transition metal catalysts and other toxic reagents. Various types of organocatalysts including amine catalysts, Brønsted acids, and Lewis bases such as N-heterocyclic carbene (NHC) catalysts, cinchona alkaloids, 4-dimethylaminopyridine (DMAP), and hydrogen bond-donating catalysts, have gained renewed interest because of their regioselectivity. In this review, we present recent advances in regiodivergent reactions that are governed by organocatalysts. Additionally, we briefly discuss the reaction pathways of achieving regiodivergent products by changes in conditions such as solvents, additives, or the temperature.
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13
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Biswas A, Ghosh A, Shankhdhar R, Chatterjee I. Squaramide Catalyzed Asymmetric Synthesis of Five‐ and Six‐Membered Rings. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100181] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Anup Biswas
- Department of Chemistry Hooghly Women's College Hooghly West Bengal India
| | - Avisek Ghosh
- Department of Chemistry Indian Institute of Technology- Ropar India
| | - Rajat Shankhdhar
- Department of Chemistry Indian Institute of Technology- Ropar India
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