1
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Rodrigues Jr. MT, de Oliveira ASB, Gomes RC, Hirata AS, Zeoly LA, Santos H, Arantes J, Reis-Silva CSM, Machado-Neto JA, Costa-Lotufo LV, Coelho F. Bismuth(III) triflate: an economical and environmentally friendly catalyst for the Nazarov reaction. Beilstein J Org Chem 2024; 20:1167-1178. [PMID: 38887581 PMCID: PMC11181232 DOI: 10.3762/bjoc.20.99] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Accepted: 05/02/2024] [Indexed: 06/20/2024] Open
Abstract
We describe the use of bismuth(III) triflate as an efficient and environmentally friendly catalyst for the Nazarov reaction of aryl vinyl ketones, leading to the synthesis of 3-aryl-2-ethoxycarbonyl-1-indanones and 3-aryl-1-indanones. By changing the temperature and reaction time, it was possible to modulate the reactivity, allowing the synthesis of two distinct product classes (3-aryl-2-ethoxycarbonyl-1-indanones and 3-aryl-1-indanones) in good to excellent yield. The reaction did not require additives and was insensitive to both air and moisture. Preliminary biological evaluation of some indanones showed a promising profile against some human cancer line cells.
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Affiliation(s)
| | | | - Ralph C Gomes
- Institute of Chemistry, Universidade Estadual de Campinas, PO Box 6154, 13083-970 Campinas, São Paulo, Brazil
| | - Amanda Soares Hirata
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, 05508-000 São Paulo, Brazil
| | - Lucas A Zeoly
- Institute of Chemistry, Universidade Estadual de Campinas, PO Box 6154, 13083-970 Campinas, São Paulo, Brazil
| | - Hugo Santos
- Institute of Chemistry, Universidade Estadual de Campinas, PO Box 6154, 13083-970 Campinas, São Paulo, Brazil
| | - João Arantes
- Institute of Chemistry, Universidade Estadual de Campinas, PO Box 6154, 13083-970 Campinas, São Paulo, Brazil
| | | | - João Agostinho Machado-Neto
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, 05508-000 São Paulo, Brazil
| | - Leticia Veras Costa-Lotufo
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, 05508-000 São Paulo, Brazil
| | - Fernando Coelho
- Institute of Chemistry, Universidade Estadual de Campinas, PO Box 6154, 13083-970 Campinas, São Paulo, Brazil
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2
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Li S, Feng Q, Song L, Zhang X, Wu YD, Sun J. Mild Stereoselective Synthesis of Densely Substituted [3]Dendralenes via Ru-Catalyzed Intermolecular Dimerization of 1,1-Disubstituted Allenes. J Am Chem Soc 2024; 146:1532-1542. [PMID: 38174923 DOI: 10.1021/jacs.3c11448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Described here is a mild and stereoselective protocol for the synthesis of [3]dendralenes via the intermolecular dimerization of allenes. With the proper choice of a ruthenium catalyst, a range of unactivated 1,1-disubstituted allenes, without prefunctionalization in the allylic position, reacted efficiently to provide rapid access to densely substituted [3]dendralenes. An intermolecular C-C bond and three different types of C═C double bonds (di-, tri-, and tetrasubstituted) embedded in an acyclic structure were constructed with good to high E/Z stereocontrol. This is in contrast to the known catalytic protocols that focus on allenes with prefunctionalization at the allylic position and/or monosubstituted allenes, which would proceed by a different mechanism or require less stereocontrol. The silyl-substituted dendralene products are precursors of other useful dendralene molecules. Density functional theory (DFT) studies and control experiments supported a mechanism involving oxidative cyclometalation, β-H elimination (the rate-determining step), and reductive elimination.
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Affiliation(s)
- Shijia Li
- Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Centre for Tissue Restoration & Reconstruction, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon 999077, Hong Kong SAR, China
- Shenzhen Bay Laboratory, Shenzhen 518132, China
| | - Qiang Feng
- Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Centre for Tissue Restoration & Reconstruction, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon 999077, Hong Kong SAR, China
| | - Lijuan Song
- School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Xinhao Zhang
- Shenzhen Bay Laboratory, Shenzhen 518132, China
- Lab of Computational Chemistry and Drug Design, State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Yun-Dong Wu
- Shenzhen Bay Laboratory, Shenzhen 518132, China
- Lab of Computational Chemistry and Drug Design, State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Jianwei Sun
- Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Centre for Tissue Restoration & Reconstruction, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon 999077, Hong Kong SAR, China
- Shenzhen Research Institute, HKUST, No. 9 Yuexing First Rd, Shenzhen 518057, China
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3
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Miguélez R, Barrio P, González JM. Recent Advances in the Catalytic Synthesis of the Cyclopentene Core. CHEM REC 2023:e202300254. [PMID: 37821421 DOI: 10.1002/tcr.202300254] [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: 07/26/2023] [Revised: 09/21/2023] [Indexed: 10/13/2023]
Abstract
Five-membered carbocycles are ubiquitously found in natural products, pharmaceuticals, and other classes of organic compounds. Within this category, cyclopentenes deserve special attention due to their prevalence as targets and as well as key intermediates for synthesizing more complex molecules. Herein, we offer an overview summarizing some significant recent advances in the catalytic assembly of this structural motif. A great variety of synthetic methodologies and strategies are covered, including transition metal-catalyzed or organocatalyzed processes. Both inter- and intramolecular transformations are documented. On this ground, our expertise in the application of C-H functionalization reactions oriented towards the formation of this ring and its subsequent selective functionalization is embedded.
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Affiliation(s)
- Rubén Miguélez
- Departamento de Química Orgánica e Inorgánica, Instituto Universitario de Química Organometálica "Enrique Moles", Universidad de Oviedo, Julián Clavería 8, 33006, Oviedo, Spain
| | - Pablo Barrio
- Departamento de Química Orgánica e Inorgánica, Instituto Universitario de Química Organometálica "Enrique Moles", Universidad de Oviedo, Julián Clavería 8, 33006, Oviedo, Spain
| | - José M González
- Departamento de Química Orgánica e Inorgánica, Instituto Universitario de Química Organometálica "Enrique Moles", Universidad de Oviedo, Julián Clavería 8, 33006, Oviedo, Spain
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4
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Rej S, Klare HFT, Oestreich M. The [3]Dendralene Motif as an Entry into Nazarov Cyclizations by Silylium-Ion Initiation. Org Lett 2023; 25:426-431. [PMID: 36603195 DOI: 10.1021/acs.orglett.2c04166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Geminal alkenes bearing an aryl and an allenyl group contain the motif of [3]dendralenes. The central alkene double bond in these cross-conjugated polyenes can be reacted with a silylium ion, thereby initiating a Nazarov cyclization. The cationic intermediate emerging from the electrocyclic ring closure is captured by hydride in the presence of excess hydrosilane. The resulting benzannulated methylenecyclopentene derivatives bearing a silylalkyl group then engage in silylium-ion regeneration followed by an unusual endo-selective intramolecular hydrosilylation. This cascade eventually leads to the formation of a silicon-containing bicyclo[3.2.1]octane skeleton.
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Affiliation(s)
- Supriya Rej
- Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 115, 10623 Berlin, Germany
| | - Hendrik F T Klare
- Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 115, 10623 Berlin, Germany
| | - Martin Oestreich
- Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 115, 10623 Berlin, Germany
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5
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Keyes JK, Butzke MB, Miller KA. Efficient total synthesis of three alpinoids via the Au(I)-catalyzed Meyer-Schuster rearrangement. Tetrahedron Lett 2022; 104:154015. [PMID: 38584726 PMCID: PMC10997375 DOI: 10.1016/j.tetlet.2022.154015] [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] [Indexed: 11/25/2022]
Abstract
The total syntheses of three structurally related natural products, deoxyalpinoid B, deoxyalpinoid A, and alpinoid F, are reported, and each features a Au(I)-catalyzed Meyer-Schuster rearrangement as the key step. The synthesis of alpinoid F is reported for the first time. The syntheses of these natural products, all of which exhibit potent anticancer activity, are readily amenable to the preparation of structural analogs.
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Affiliation(s)
- Jasmine K. Keyes
- Department of Chemistry and Biochemistry, Fort Lewis College, 1000 Rim Drive, Durango, CO 81301, United States
| | - Mauri B. Butzke
- Department of Chemistry and Biochemistry, Fort Lewis College, 1000 Rim Drive, Durango, CO 81301, United States
| | - Kenneth A. Miller
- Department of Chemistry and Biochemistry, Fort Lewis College, 1000 Rim Drive, Durango, CO 81301, United States
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6
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Almubayedh S, Green JR. Alkynedicobalt mediated vinylogous Nazarov reactions. Org Biomol Chem 2021; 20:1004-1007. [PMID: 34951440 DOI: 10.1039/d1ob02256c] [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
The SnCl4 mediated reactions of cross conjugated aryl enynone-Co2(CO)6 and dienynone-Co2(CO)6 complexes afford benzocycloheptynone complexes or cycloheptenynone complexes in a thermal vinylogous Nazarov process. The rate of ring closure is strongly dependent on the ketone α-substituent.
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Affiliation(s)
- Somaiah Almubayedh
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON, N9B 3P4, Canada.
| | - James R Green
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON, N9B 3P4, Canada.
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7
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Chaves-Pouso A, Rivera-Chao E, Fañanás-Mastral M. Copper-catalyzed protoboration of borylated dendralenes: a regio- and stereoselective access to functionalized 1,3-dienes. Chem Commun (Camb) 2020; 56:12230-12233. [PMID: 32926014 DOI: 10.1039/d0cc04018e] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A copper-catalyzed protoboration of borylated dendralenes is reported. The method employs an NHC-Cu catalyst and provides access to 1,4-addition products with excellent levels of chemo-, regio- and stereoselectivity. The resulting diene bis(boronates) are oxidized to the corresponding diene diols which are synthetically versatile building blocks.
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Affiliation(s)
- Andrea Chaves-Pouso
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain.
| | - Eva Rivera-Chao
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain.
| | - Martín Fañanás-Mastral
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain.
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8
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Shukla RK, Nair AM, Khan S, Volla CMR. Cobalt-Catalyzed C8-Dienylation of Quinoline-N-Oxides. Angew Chem Int Ed Engl 2020; 59:17042-17048. [PMID: 32558084 DOI: 10.1002/anie.202003216] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 05/25/2020] [Indexed: 12/19/2022]
Abstract
An efficient Cp*CoIII -catalyzed C8-dienylation of quinoline-N-oxides was achieved by employing allenes bearing leaving groups at the α-position as the dienylating agents. The reaction proceeds by CoIII -catalyzed C-H activation of quinoline-N-oxides and regioselective migratory insertion of the allene followed by a β-oxy elimination, leading to overall dienylation. Site-selective C-H activation was achieved with excellent selectivity under mild reaction conditions, and 30 mol % of a NaF additive was found to be crucial for the efficient dienylation. The methodology features high stereoselectivity, mild reaction conditions, and good functional-group tolerance. C8-alkenylation of quinoline-N-oxides was achieved in the case of allenes devoid of leaving groups as coupling partners. Furthermore, gram-scale preparation and preliminary mechanistic experiments were carried out to gain insights into the reaction mechanism.
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Affiliation(s)
- Rahul K Shukla
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, India
| | - Akshay M Nair
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, India
| | - Salman Khan
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, India
| | - Chandra M R Volla
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, India
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9
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Novel d-Annulated Pentacyclic Steroids: Regioselective Synthesis and Biological Evaluation in Breast Cancer Cells. Molecules 2020; 25:molecules25153499. [PMID: 32752019 PMCID: PMC7435891 DOI: 10.3390/molecules25153499] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 07/29/2020] [Accepted: 07/30/2020] [Indexed: 12/19/2022] Open
Abstract
The acid-catalyzed cyclization of benzylidenes based on 16-dehydropregnenolone acetate (16-DPA) was studied. It was found that these compounds readily undergo regioselective interrupted Nazarov cyclization with trapping chloride ion and an efficient method of the synthesis of d-annulated pentacyclic steroids based on this reaction was proposed. The structures of the synthesized pentacyclic steroids were determined by NMR and X-ray diffraction. It was found that the reaction affords a single diastereomer, but the latter can crystallize as two conformers depending on the structure. Antiproliferative activity of synthesized compounds was evaluated against two breast cancer cell lines: MCF-7 and MDA-MB-231. All tested compounds showed relatively high antiproliferative activity. The synthetic potential of the protocol developed was illustrated by the gram-scale experiment.
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10
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Shukla RK, Nair AM, Khan S, Volla CMR. Cobalt‐Catalyzed C8‐Dienylation of Quinoline‐
N
‐Oxides. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202003216] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Rahul K. Shukla
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai India
| | - Akshay M. Nair
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai India
| | - Salman Khan
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai India
| | - Chandra M. R. Volla
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai India
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11
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Naidu VR, Bäckvall JE. Synthesis of Cross-Conjugated Polyenes via Palladium-Catalyzed Oxidative C-C Bond Forming Cascade Reactions of Allenes. J Org Chem 2020; 85:5428-5437. [PMID: 32207975 PMCID: PMC7311062 DOI: 10.1021/acs.joc.0c00186] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
An efficient palladium-catalyzed oxidative C-C bond forming cascade reaction of allenes involving a coupling between an enallene and an allenyne followed by a carbocyclization of the generated Pd-intermediate was developed. This cascade reaction afforded functionalized cross-conjugated polyenes. The enallene is initially activated by palladium and reacts with the allenyne to give the cross-conjugated polyenes.
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Affiliation(s)
- Veluru Ramesh Naidu
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden.,Department of Natural Sciences, Mid Sweden University, Holmgatan 10, SE-851 79, Sundsvall, Sweden
| | - Jan-E Bäckvall
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden.,Department of Natural Sciences, Mid Sweden University, Holmgatan 10, SE-851 79, Sundsvall, Sweden
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12
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Affiliation(s)
- Anton V. Yadykov
- N. D. Zelinsky Institute of Organic ChemistryRussian Academy of Sciences 47 Leninsky prosp., 119991 Moscow Russian Federation
| | - Valerii Z. Shirinian
- N. D. Zelinsky Institute of Organic ChemistryRussian Academy of Sciences 47 Leninsky prosp., 119991 Moscow Russian Federation
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13
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Nguyen XB, Nakano Y, Duggan NM, Scott L, Breugst M, Lupton DW. N‐Heterocyclic Carbene Catalyzed (5+1) Annulations Exploiting a Vinyl Dianion Synthon Strategy. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201905475] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xuan B. Nguyen
- School of Chemistry Monash University Clayton 3800 Victoria Australia
| | - Yuji Nakano
- School of Chemistry Monash University Clayton 3800 Victoria Australia
| | | | - Lydia Scott
- School of Chemistry Monash University Clayton 3800 Victoria Australia
| | - Martin Breugst
- Department für Chemie Universität zu Köln Greinstraße 4 50939 Köln Germany
| | - David W. Lupton
- School of Chemistry Monash University Clayton 3800 Victoria Australia
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14
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Nguyen XB, Nakano Y, Duggan NM, Scott L, Breugst M, Lupton DW. N‐Heterocyclic Carbene Catalyzed (5+1) Annulations Exploiting a Vinyl Dianion Synthon Strategy. Angew Chem Int Ed Engl 2019; 58:11483-11490. [DOI: 10.1002/anie.201905475] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Indexed: 12/22/2022]
Affiliation(s)
- Xuan B. Nguyen
- School of Chemistry Monash University Clayton 3800 Victoria Australia
| | - Yuji Nakano
- School of Chemistry Monash University Clayton 3800 Victoria Australia
| | | | - Lydia Scott
- School of Chemistry Monash University Clayton 3800 Victoria Australia
| | - Martin Breugst
- Department für Chemie Universität zu Köln Greinstraße 4 50939 Köln Germany
| | - David W. Lupton
- School of Chemistry Monash University Clayton 3800 Victoria Australia
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15
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Ghosh C, Nagtilak PJ, Kapur M. Rhodium(III)-Catalyzed Directed C-H Dienylation of Anilides with Allenes Leads to Highly Conjugated Systems. Org Lett 2019; 21:3237-3241. [PMID: 30998382 DOI: 10.1021/acs.orglett.9b00958] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Allenes are unique coupling partners in transition-metal-catalyzed C-H functionalization leading to a variety of products via alkenylation, allenylation, allylation, and annulation reactions. The outcome is governed by both the reactivity of the allene and the formation and stability of the organometallic intermediate. An efficient Rh(III)-catalyzed, weakly coordinating group-directed dienylation of electronically unbiased allenes is developed using an N-acyl amino acid as a ligand. Further elaboration of the dienylated products to construct polycyclic compounds is also described.
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Affiliation(s)
- Chiranjit Ghosh
- Department of Chemistry , Indian Institute of Science Education and Research Bhopal , Bhopal Bypass Road , Bhauri, Bhopal 462066 , Madhya Pradesh , India
| | - Prajyot Jayadev Nagtilak
- Department of Chemistry , Indian Institute of Science Education and Research Bhopal , Bhopal Bypass Road , Bhauri, Bhopal 462066 , Madhya Pradesh , India
| | - Manmohan Kapur
- Department of Chemistry , Indian Institute of Science Education and Research Bhopal , Bhopal Bypass Road , Bhauri, Bhopal 462066 , Madhya Pradesh , India
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16
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Cao T, Chen L, Zhu S. Mechanism-Guided Scaffold Diversification: Perturbing and Trapping the Intermediates of Maltol-Type Cascade Claisen Rearrangement. Org Lett 2018; 21:90-94. [PMID: 30566350 DOI: 10.1021/acs.orglett.8b03519] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A mechanism-guided study to harness different kinds of active species in the cascade Claisen rearrangement for scaffold diversification has been developed. These robust and practical processes furnished a series of architectures with a large chemical space, varying from planar to three-dimensional. In addition, several interesting reactions were observed, such as [3 + 3] dimerization, quinone-based vinylogous Nazarov-type cyclization, and a rare 12e [σ2a + π2s + π2a + π2s + (π2a + π2s)] Mobius aromatic transition state mediated rearrangement.
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Affiliation(s)
- Tongxiang Cao
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering , South China University of Technology , Guangzhou , 510640 , P. R. China
| | - Lianfen Chen
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering , South China University of Technology , Guangzhou , 510640 , P. R. China
| | - Shifa Zhu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering , South China University of Technology , Guangzhou , 510640 , P. R. China
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17
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Rivera-Chao E, Fañanás-Mastral M. Synthesis of Stereodefined Borylated Dendralenes through Copper-Catalyzed Allylboration of Alkynes. Angew Chem Int Ed Engl 2018; 57:9945-9949. [DOI: 10.1002/anie.201806334] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Indexed: 11/09/2022]
Affiliation(s)
- Eva Rivera-Chao
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS); Departamento de Química Orgánica; Universidade de Santiago de Compostela; 15782 Santiago de Compostela Spain
| | - Martín Fañanás-Mastral
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS); Departamento de Química Orgánica; Universidade de Santiago de Compostela; 15782 Santiago de Compostela Spain
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18
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Rivera-Chao E, Fañanás-Mastral M. Synthesis of Stereodefined Borylated Dendralenes through Copper-Catalyzed Allylboration of Alkynes. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806334] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Eva Rivera-Chao
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS); Departamento de Química Orgánica; Universidade de Santiago de Compostela; 15782 Santiago de Compostela Spain
| | - Martín Fañanás-Mastral
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS); Departamento de Química Orgánica; Universidade de Santiago de Compostela; 15782 Santiago de Compostela Spain
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19
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Campos RB, Tantillo DJ. Coupled Electrocyclization/Prototropic Shift in the Biosynthesis of Crotinsulidane Diterpenoids. J Org Chem 2018; 83:1073-1076. [DOI: 10.1021/acs.joc.7b02904] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Renan B. Campos
- Departamento
Acadêmico de Química e Biologia, Universidade Tecnológica Federal do Paraná, Rua Deputado Heitor de Alencar Furtado,
5000, 81280-340, Curitiba, Brazil
| | - Dean J. Tantillo
- Department
of Chemistry, University of California—Davis, 1 Shields Avenue, Davis, California 95616, United States
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20
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Qiu Y, Posevins D, Bäckvall JE. Selective Palladium-Catalyzed Allenic C-H Bond Oxidation for the Synthesis of [3]Dendralenes. Angew Chem Int Ed Engl 2017; 56:13112-13116. [PMID: 28799682 DOI: 10.1002/anie.201706211] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Indexed: 12/13/2022]
Abstract
A highly selective palladium-catalyzed allenic C-H bond oxidation was developed, and it provides a novel and straightforward synthesis of [3]dendralene derivatives. A variety of [3]dendralenes with diverse substitution patterns are accessible with good efficiency and high stereoselectivity. The reaction tolerates a broad substrate scope containing various functional groups on the allene moiety, including ketone, aldehyde, ester, and phenyl groups. Also, a wide range of olefins with both electron-donating and electron-withdrawing aryls, acrylate, sulfone, and phosphonate groups are tolerated.
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Affiliation(s)
- Youai Qiu
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 10691, Stockholm, Sweden
| | - Daniels Posevins
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 10691, Stockholm, Sweden
| | - Jan-E Bäckvall
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 10691, Stockholm, Sweden
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21
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Zhang T, Song C, Meng Y, Chen P, Xu H, Chang J. A Palladium-Catalyzed Monodearoylative Dimerization Approach for the Synthesis of [3]Dendralenes. J Org Chem 2017; 82:9905-9909. [PMID: 28816455 DOI: 10.1021/acs.joc.7b01710] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
On treatment with Pd(OAc)2 and K2CO3, a variety of 3-aryl-2-(2-bromoallyl)-1,3-dicarbonyl compounds went through a monodearoylative dimerization reaction to provide polysubstituted [3]dendralenes in moderate to good isolated yields.
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Affiliation(s)
- Tiantian Zhang
- College of Chemistry and Molecular Engineering, Zhengzhou University , Zhengzhou 450001, China
| | - Chuanjun Song
- College of Chemistry and Molecular Engineering, Zhengzhou University , Zhengzhou 450001, China
| | - Yinggao Meng
- College of Chemistry and Molecular Engineering, Zhengzhou University , Zhengzhou 450001, China
| | - Panpan Chen
- College of Chemistry and Molecular Engineering, Zhengzhou University , Zhengzhou 450001, China
| | - Hongjin Xu
- College of Chemistry and Molecular Engineering, Zhengzhou University , Zhengzhou 450001, China
| | - Junbiao Chang
- College of Chemistry and Molecular Engineering, Zhengzhou University , Zhengzhou 450001, China.,Collaborative Innovation Center of New Drug Research and Safety Evaluation, Henan Province, Zhengzhou 450001, China
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22
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Qiu Y, Posevins D, Bäckvall JE. Selective Palladium-Catalyzed Allenic C−H Bond Oxidation for the Synthesis of [3]Dendralenes. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201706211] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Youai Qiu
- Department of Organic Chemistry; Arrhenius Laboratory; Stockholm University; 10691 Stockholm Sweden
| | - Daniels Posevins
- Department of Organic Chemistry; Arrhenius Laboratory; Stockholm University; 10691 Stockholm Sweden
| | - Jan-E. Bäckvall
- Department of Organic Chemistry; Arrhenius Laboratory; Stockholm University; 10691 Stockholm Sweden
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23
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Carmichael RA, Sophanpanichkul P, Chalifoux WA. β-Silyl-Assisted Tandem Diels–Alder/Nazarov Reaction of 1-Aryl-3-(trimethylsilyl) Ynones. Org Lett 2017; 19:2592-2595. [DOI: 10.1021/acs.orglett.7b00911] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Rachael A. Carmichael
- Department of Chemistry, University of Nevada—Reno, 1664 North Virginia Street, Reno, Nevada 89557, United States
| | - Punyanuch Sophanpanichkul
- Department of Chemistry, University of Nevada—Reno, 1664 North Virginia Street, Reno, Nevada 89557, United States
| | - Wesley A. Chalifoux
- Department of Chemistry, University of Nevada—Reno, 1664 North Virginia Street, Reno, Nevada 89557, United States
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24
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Abstract
The acid-promoted cycloisomerization of conjugated dienals and linearly-conjugated dienones for the synthesis of five-membered ring systems is reviewed.
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Affiliation(s)
- Martín J. Riveira
- Departamento de Química Orgánica
- Instituto de Química Rosario (CONICET – UNR)
- Facultad de Ciencias Bioquímicas y Farmacéuticas
- Universidad Nacional de Rosario
- Suipacha 531
| | - Lucía A. Marsili
- Departamento de Química Orgánica
- Instituto de Química Rosario (CONICET – UNR)
- Facultad de Ciencias Bioquímicas y Farmacéuticas
- Universidad Nacional de Rosario
- Suipacha 531
| | - Mirta P. Mischne
- Departamento de Química Orgánica
- Instituto de Química Rosario (CONICET – UNR)
- Facultad de Ciencias Bioquímicas y Farmacéuticas
- Universidad Nacional de Rosario
- Suipacha 531
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25
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Mao M, Zhang L, Chen YZ, Zhu J, Wu L. Palladium-Catalyzed Coupling of Allenylphosphine Oxides with N-Tosylhydrazones toward Phosphinyl [3]Dendralenes. ACS Catal 2016. [DOI: 10.1021/acscatal.6b02972] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mao Mao
- Jiangsu
Key Laboratory of Pesticide Science and Department of Chemistry, College
of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Ling Zhang
- Jiangsu
Key Laboratory of Pesticide Science and Department of Chemistry, College
of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Yao-Zhong Chen
- Jiangsu
Key Laboratory of Pesticide Science and Department of Chemistry, College
of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Jie Zhu
- Jiangsu
Key Laboratory of Pesticide Science and Department of Chemistry, College
of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Lei Wu
- Jiangsu
Key Laboratory of Pesticide Science and Department of Chemistry, College
of Sciences, Nanjing Agricultural University, Nanjing 210095, China
- Beijing
National Laboratory for Molecular Sciences and Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
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26
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William R, Wang S, Mallick A, Liu XW. Interrupting Nazarov Reaction with Different Trapping Modality: Utilizing Potassium Alkynyltrifluoroborate as a σ-Nucleophile. Org Lett 2016; 18:4458-61. [DOI: 10.1021/acs.orglett.6b01606] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ronny William
- Division
of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Siming Wang
- Division
of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Asadulla Mallick
- Division
of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Xue-Wei Liu
- Division
of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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27
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Abstract
The first examples of a photochemically induced vinylogous Nazarov-type cyclization forming a cycloheptadienone core are described. The reaction can be included in a three-step cascade consisting of a photochemical isoxazole-azirine ring contraction, cobalt(II)-catalyzed ring expansion, and the photochemical cyclization. Furthermore, the first representative of the hitherto unknown 1-azatricyclo[2.2.0.0(2,6)]hexanes has been identified as a side product of the azirine formation.
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Affiliation(s)
- Stefan Pusch
- Institute of Organic Chemistry, Johannes Gutenberg University , Duesbergweg 10-14, 55128 Mainz, Germany
| | - Dieter Schollmeyer
- Institute of Organic Chemistry, Johannes Gutenberg University , Duesbergweg 10-14, 55128 Mainz, Germany
| | - Till Opatz
- Institute of Organic Chemistry, Johannes Gutenberg University , Duesbergweg 10-14, 55128 Mainz, Germany
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28
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29
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Thies N, Haak E. Ruthenium-catalyzed synthesis of 2,3-cyclo[3]dendralenes and complex polycycles from propargyl alcohols. Angew Chem Int Ed Engl 2015; 54:4097-101. [PMID: 25655395 DOI: 10.1002/anie.201412207] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Indexed: 11/11/2022]
Abstract
Ruthenium-catalyzed cascade transformations for the synthesis of 2,3-cyclo[3]dendralenes and multicomponent processes based thereon to generate complex polycycles are presented. The combination of allylation-cyclization sequences with diene-transmissive Diels-Alder reactions allows the rapid and selective construction of natural-product-like motifs from easily accessible starting materials in a one-pot process and provides a new method to access potential drug candidates.
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Affiliation(s)
- Nora Thies
- Institut für Chemie, Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106 Magdeburg (Germany) http://www.ich.ovgu.de
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30
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Sudhakar G, Satish K. Nazarov Cyclization of Divinyl and Arylvinyl Epoxides: Application in the Synthesis of Resveratrol-Based Natural Products. Chemistry 2015; 21:6475-80. [DOI: 10.1002/chem.201500362] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Indexed: 11/05/2022]
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31
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Thies N, Haak E. Rutheniumkatalysierte Synthese von 2,3-Cyclo[3]dendralenen und komplexer Polycyclen aus Propargylalkoholen. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201412207] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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32
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Daneshfar Z, Rostami A. Cellulose sulfonic acid as a green, efficient, and reusable catalyst for Nazarov cyclization of unactivated dienones and pyrazoline synthesis. RSC Adv 2015. [DOI: 10.1039/c5ra19773b] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A high yielding and eco-friendly procedure for the preparation of cyclopentenoid and pyrazoline derivatives via cellulose sulfonic acid-mediated electrocyclization processes.
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Affiliation(s)
- Zahra Daneshfar
- Department of Polymer Chemistry
- Faculty of Chemistry
- Shahid Beheshti University
- Tehran
- I. R. Iran
| | - Ali Rostami
- Department of Polymer Chemistry
- Faculty of Chemistry
- Shahid Beheshti University
- Tehran
- I. R. Iran
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33
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Dethe DH, Boda R, Murhade GM. Lewis acid catalyzed Nazarov type cyclization for the synthesis of a substituted indane framework: total synthesis of (±)-mutisianthol. Org Chem Front 2015. [DOI: 10.1039/c5qo00005j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new synthetic route has been developed for the synthesis of a substituted indane derivative using Lewis acid catalyzed modified Nazarov type cyclization, which was further applied in the total synthesis of mutisianthol and epi-mutisianthol in a nine step longest linear sequence.
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Affiliation(s)
- Dattatraya H. Dethe
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| | - Raghavender Boda
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| | - Ganesh M. Murhade
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
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34
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Xu Z, Ren H, Wang L, Tang Y. Efficient catalytic enantioselective Nazarov cyclizations of divinyl ketoesters. Org Chem Front 2015. [DOI: 10.1039/c5qo00099h] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient catalytic enantioselective Nazarov cyclization of divinyl ketoesters is developed using a BOX/Cu(ii) catalyst, affording various optically active cyclopent-2-enone esters.
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Affiliation(s)
- Zhou Xu
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
| | - Hai Ren
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
| | - Lijia Wang
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
| | - Yong Tang
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
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35
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Matier CD, Kwon Y, West F. Efficient synthesis of bicyclo[6.3.0]undecadienones by Nazarov cyclization/regioselective elimination. CAN J CHEM 2014. [DOI: 10.1139/cjc-2013-0456] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Easily accessible cyclooctadienyl vinyl ketones can generate fused bicyclic 8-5 (bicyclo[6.3.0]undecadienone) ring systems via the Nazarov cyclization when treated with Lewis acid. The resultant products contain three new stereocenters as well as olefins suitably situated to allow further structural elaboration. This concise sequence allows for the rapid preparation of intermediates that should be applicable to a variety of natural product targets containing this bicyclic core.
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Affiliation(s)
- Carson D. Matier
- Department of Chemistry, University of Alberta, E3-43 Gunning/Lemieux Chemistry Centre, Edmonton, AB T6G 2G2, Canada
| | - Yonghoon Kwon
- Department of Chemistry, University of Alberta, E3-43 Gunning/Lemieux Chemistry Centre, Edmonton, AB T6G 2G2, Canada
| | - F.G. West
- Department of Chemistry, University of Alberta, E3-43 Gunning/Lemieux Chemistry Centre, Edmonton, AB T6G 2G2, Canada
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36
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Wang H, Beiring B, Yu DG, Collins KD, Glorius F. [3]Dendralensynthese: Rhodium(III)-katalysierte Alkenyl-C-H- Aktivierung und Kupplungsreaktion mit Allenylcarbinolcarbonat. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201306754] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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37
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Wang H, Beiring B, Yu DG, Collins KD, Glorius F. [3]Dendralene Synthesis: Rhodium(III)-Catalyzed Alkenyl CH Activation and Coupling Reaction with Allenyl Carbinol Carbonate. Angew Chem Int Ed Engl 2013; 52:12430-4. [DOI: 10.1002/anie.201306754] [Citation(s) in RCA: 148] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Indexed: 11/11/2022]
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38
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Marzo L, Parra A, Frías M, Alemán J, García Ruano JL. Synthesis of Alkyl-Ynol-Ethers by “Anti-Michael Addition” of Metal Alkoxides to β-Substituted Alkynylsulfones. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300395] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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39
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40
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Lebœuf D, Wright CM, Frontier AJ. Reagent Control of [1,2]-Wagner-Meerwein Shift Chemoselectivity Following the Nazarov Cyclization: Application to the Total Synthesis of Enokipodin B. Chemistry 2013; 19:4835-41. [PMID: 23436444 DOI: 10.1002/chem.201203395] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2012] [Revised: 11/26/2012] [Indexed: 02/05/2023]
Affiliation(s)
- David Lebœuf
- Department of Chemistry, University of Rochester, Rochester, NY 14627, USA
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41
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Verrier C, Carret S, Poisson JF. Asymmetric Addition of Alkoxy Ethynyl Anion to Chiral N-Sulfinyl Imines. Org Lett 2012; 14:5122-5. [DOI: 10.1021/ol302392k] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Charlie Verrier
- Département de Chimie Moléculaire (SERCO), UMR-5250, ICMG FR-2607, CNRS, Université Joseph Fourier, BP 53, 38041 Grenoble Cedex 9, France
| | - Sébastien Carret
- Département de Chimie Moléculaire (SERCO), UMR-5250, ICMG FR-2607, CNRS, Université Joseph Fourier, BP 53, 38041 Grenoble Cedex 9, France
| | - Jean-Francois Poisson
- Département de Chimie Moléculaire (SERCO), UMR-5250, ICMG FR-2607, CNRS, Université Joseph Fourier, BP 53, 38041 Grenoble Cedex 9, France
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42
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Guo F, Wang L, Mao S, Zhang C, Yu J, Han J. Cationic bromonium complex: NBS/P(OPh)3 as an efficient catalyst for Nazarov cyclization. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.06.107] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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43
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Shimada N, Stewart C, Bow WF, Jolit A, Wong K, Zhou Z, Tius MA. Neutral Nazarov-type cyclization catalyzed by palladium(0). Angew Chem Int Ed Engl 2012; 51:5727-9. [PMID: 22539448 DOI: 10.1002/anie.201201724] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2012] [Indexed: 11/11/2022]
Affiliation(s)
- Naoyuki Shimada
- Chemistry Department, University of Hawaii at Manoa, 2545 The Mall, Honolulu, HI 96822, USA
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44
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Shimada N, Stewart C, Bow WF, Jolit A, Wong K, Zhou Z, Tius MA. Neutral Nazarov-Type Cyclization Catalyzed by Palladium(0). Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201201724] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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45
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Lebœuf D, Gandon V, Ciesielski J, Frontier AJ. Experimental and theoretical studies on the Nazarov cyclization/Wagner-Meerwein rearrangement sequence. J Am Chem Soc 2012; 134:6296-308. [PMID: 22471833 PMCID: PMC3382077 DOI: 10.1021/ja211970p] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Highly functionalized cyclopentenones can be generated by a chemoselective copper(II)-mediated Nazarov/Wagner-Meerwein rearrangement sequence of divinyl ketones. A detailed investigation of this sequence is described including a study of substrate scope and limitations. After the initial 4π electrocyclization, this reaction proceeds via two different sequential [1,2]-shifts, with selectivity that depends upon either migratory ability or the steric bulkiness of the substituents at C1 and C5. This methodology allows the creation of vicinal stereogenic centers, including adjacent quaternary centers. This sequence can also be achieved by using a catalytic amount of copper(II) in combination with NaBAr(4)(f), a weak Lewis acid. During the study of the scope of the reaction, a partial or complete E/Z isomerization of the enone moiety was observed in some cases prior to the cyclization, which resulted in a mixture of diastereomeric products. Use of a Cu(II)-bisoxazoline complex prevented the isomerization, allowing high diastereoselectivity to be obtained in all substrate types. In addition, the reaction sequence was studied by DFT computations at the UB3LYP/6-31G(d,p) level, which are consistent with the proposed sequences observed, including E/Z isomerizations and chemoselective Wagner-Meerwein shifts.
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Affiliation(s)
- David Lebœuf
- Department of Chemistry, University of Rochester, Rochester, NY 14627
| | - Vincent Gandon
- ICMMO, UMR CNRS 8182, Université Paris-Sud 11, 91405 Orsay cedex, France
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46
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Hopf H, Sherburn MS. Dendralene auf dem Vormarsch: kreuzkonjugierte Oligoene ermöglichen den schnellen Aufbau molekularer Komplexität. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201102987] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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47
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Hopf H, Sherburn MS. Dendralenes Branch Out: Cross-Conjugated Oligoenes Allow the Rapid Generation of Molecular Complexity. Angew Chem Int Ed Engl 2012; 51:2298-338. [DOI: 10.1002/anie.201102987] [Citation(s) in RCA: 134] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2011] [Revised: 09/12/2011] [Indexed: 11/11/2022]
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48
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Lebœuf D, Huang J, Gandon V, Frontier AJ. Using Nazarov electrocyclization to stage chemoselective [1,2]-migrations: stereoselective synthesis of functionalized cyclopentenones. Angew Chem Int Ed Engl 2011; 50:10981-5. [PMID: 21953873 DOI: 10.1002/anie.201104870] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2011] [Revised: 08/17/2011] [Indexed: 11/08/2022]
Affiliation(s)
- David Lebœuf
- Department of Chemistry, University of Rochester, Rochester, NY 14627, USA
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49
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Antiñolo A, Carrillo-Hermosilla F, Cadierno V, García-Álvarez J, Otero A. Microwave-Assisted Meyer-Schuster Rearrangement of Propargylic Alcohols Catalyzed by the Oxovanadate Complex [V(O)Cl(OEt)2]. ChemCatChem 2011. [DOI: 10.1002/cctc.201100239] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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50
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Lebœuf D, Huang J, Gandon V, Frontier AJ. Using Nazarov Electrocyclization to Stage Chemoselective [1,2]-Migrations: Stereoselective Synthesis of Functionalized Cyclopentenones. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201104870] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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