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Tangdenpaisal K, Kheakwanwong W, Ruchirawat S, Ploypradith P. Dihydro-10 H-indeno[1,2- b]benzofurans and Tetrahydroindeno[1,2- c]isochromenes via Stereoselective Intramolecular Carbocation Cascade Cyclization. J Org Chem 2024; 89:2964-2983. [PMID: 38345392 DOI: 10.1021/acs.joc.3c02380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
Nazarov cyclization of the (E)-(2-stilbenyl)methanols under the catalysis of p-TsOH immobilized on silica (PTS-Si) proceeded to give the corresponding indanyl cation with the exclusive trans relationship at the two newly formed adjacent stereogenic centers. The ensuing intramolecular nucleophilic addition by the MOM-protected phenol (m = 0) or benzyl alcohol (m = 1) furnished the Indane-fused benzofuran [5/5] or isochroman [5/6] system, respectively, with the exclusive cis stereocontrol at the two-carbon ring junction. Thus, in a single step, from nonchiral starting materials, the intramolecular cascade carbocation cyclization (CCC) furnished the [5/5] or [5/6] oxygen-containing Indane fused-ring systems in moderate to good yields with excellent stereoselectivity on all three contiguous stereogenic centers.
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Affiliation(s)
- Kassrin Tangdenpaisal
- Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6 Road, Laksi, Bangkok, Thailand 10210
| | - Wichita Kheakwanwong
- Program in Chemical Sciences, Chulabhorn Graduate Institute, 54 Kamphaeng Phet 6 Road, Laksi, Bangkok, Thailand 10210
| | - Somsak Ruchirawat
- Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6 Road, Laksi, Bangkok, Thailand 10210
- Program in Chemical Sciences, Chulabhorn Graduate Institute, 54 Kamphaeng Phet 6 Road, Laksi, Bangkok, Thailand 10210
- Center of Excellence on Environmental Health and Toxicology, Office of the Permanent Secretary (OPS), Ministry of Higher Education, Science, Research and Innovation (MHESI), Bangkok, Thailand 10400
| | - Poonsakdi Ploypradith
- Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6 Road, Laksi, Bangkok, Thailand 10210
- Program in Chemical Sciences, Chulabhorn Graduate Institute, 54 Kamphaeng Phet 6 Road, Laksi, Bangkok, Thailand 10210
- Center of Excellence on Environmental Health and Toxicology, Office of the Permanent Secretary (OPS), Ministry of Higher Education, Science, Research and Innovation (MHESI), Bangkok, Thailand 10400
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2
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Nistanaki SK, Williams CG, Wigman B, Wong JJ, Haas BC, Popov S, Werth J, Sigman MS, Houk KN, Nelson HM. Catalytic asymmetric C-H insertion reactions of vinyl carbocations. Science 2022; 378:1085-1091. [PMID: 36480623 PMCID: PMC9993429 DOI: 10.1126/science.ade5320] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
From the preparation of pharmaceuticals to enzymatic construction of natural products, carbocations are central to molecular synthesis. Although these reactive intermediates are engaged in stereoselective processes in nature, exerting enantiocontrol over carbocations with synthetic catalysts remains challenging. Many resonance-stabilized tricoordinated carbocations, such as iminium and oxocarbenium ions, have been applied in catalytic enantioselective reactions. However, their dicoordinated counterparts (aryl and vinyl carbocations) have not, despite their emerging utility in chemical synthesis. We report the discovery of a highly enantioselective vinyl carbocation carbon-hydrogen (C-H) insertion reaction enabled by imidodiphosphorimidate organocatalysts. Active site confinement featured in this catalyst class not only enables effective enantiocontrol but also expands the scope of vinyl cation C-H insertion chemistry, which broadens the utility of this transition metal-free C(sp3)-H functionalization platform.
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Affiliation(s)
- Sepand K Nistanaki
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA
| | - Chloe G Williams
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA
| | - Benjamin Wigman
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Jonathan J Wong
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Brittany C Haas
- Department of Chemistry, University of Utah, Salt Lake City, UT 84112, USA
| | - Stasik Popov
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Jacob Werth
- Department of Chemistry, University of Utah, Salt Lake City, UT 84112, USA
| | - Matthew S Sigman
- Department of Chemistry, University of Utah, Salt Lake City, UT 84112, USA
| | - K N Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Hosea M Nelson
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA
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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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Highly Regioselective Tandem Reaction of Ene-Yne-Oxazolones Induced by H-Phosphonates: Construction of Phosphinylindane Derivatives. J Org Chem 2021; 86:9360-9383. [PMID: 34213338 DOI: 10.1021/acs.joc.1c00609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A highly regioselective divergent approach for the phosphine-containing indane/indene derivatives from the ene-yne-oxazolone precursors was reported. An insight into the reaction mechanism involving the phospha-1,4-addition followed by 5-exo-dig ring closure with a concomitant C-P/C-C bond formation was also proposed. This promising protocol utilized H-phosphonate as the phosphonating reagent in a silver-catalyzed or base-mediated cascade cyclization to construct the corresponding phosphorylated spiroindenoxazolones and amidoindenes, respectively, in good yields (up to 88% yield).
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Diao H, Wang C, Zhang Z, Shi Z, Liu F. Fe‐Catalyzed Intramolecular Cross‐Dehydrogenative Arylation (CDA), Efficient Synthesis of 1‐Arylnaphthalenes and 4‐Arylcoumarins. Helv Chim Acta 2021. [DOI: 10.1002/hlca.202100056] [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)
- Haiyan Diao
- School of Perfume and Aroma Technology Shanghai Institute of Technology 100 Haiquan Rd Shanghai 201418 P. R. China
| | - Changcheng Wang
- Department of Chemistry Fudan University 2005 Songhu Rd Shanghai 200438 P. R. China
| | - Zhen Zhang
- School of Perfume and Aroma Technology Shanghai Institute of Technology 100 Haiquan Rd Shanghai 201418 P. R. China
| | - Zhangjie Shi
- Department of Chemistry Fudan University 2005 Songhu Rd Shanghai 200438 P. R. China
| | - Feng Liu
- School of Perfume and Aroma Technology Shanghai Institute of Technology 100 Haiquan Rd Shanghai 201418 P. R. China
- Department of Chemistry Fudan University 2005 Songhu Rd Shanghai 200438 P. R. China
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Dasgupta A, Stefkova K, Babaahmadi R, Yates BF, Buurma NJ, Ariafard A, Richards E, Melen RL. Site-Selective C sp3-C sp/C sp3-C sp2 Cross-Coupling Reactions Using Frustrated Lewis Pairs. J Am Chem Soc 2021; 143:4451-4464. [PMID: 33719443 PMCID: PMC8041292 DOI: 10.1021/jacs.1c01622] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Indexed: 02/08/2023]
Abstract
The donor-acceptor ability of frustrated Lewis pairs (FLPs) has led to widespread applications in organic synthesis. Single electron transfer from a donor Lewis base to an acceptor Lewis acid can generate a frustrated radical pair (FRP) depending on the substrate and energy required (thermal or photochemical) to promote an FLP into an FRP system. Herein, we report the Csp3-Csp cross-coupling reaction of aryl esters with terminal alkynes using the B(C6F5)3/Mes3P FLP. Significantly, when the 1-ethynyl-4-vinylbenzene substrate was employed, the exclusive formation of Csp3-Csp cross-coupled products was observed. However, when 1-ethynyl-2-vinylbenzene was employed, solvent-dependent site-selective Csp3-Csp or Csp3-Csp2 cross-coupling resulted. The nature of these reaction pathways and their selectivity has been investigated by extensive electron paramagnetic resonance (EPR) studies, kinetic studies, and density functional theory (DFT) calculations both to elucidate the mechanism of these coupling reactions and to explain the solvent-dependent site selectivity.
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Affiliation(s)
- Ayan Dasgupta
- Cardiff
Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, Cymru/Wales, United Kingdom
| | - Katarina Stefkova
- Cardiff
Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, Cymru/Wales, United Kingdom
| | - Rasool Babaahmadi
- School
of Natural Sciences-Chemistry, University
of Tasmania Private Bag 75, Hobart, Tasmania 7001, Australia
| | - Brian F. Yates
- School
of Natural Sciences-Chemistry, University
of Tasmania Private Bag 75, Hobart, Tasmania 7001, Australia
| | - Niklaas J. Buurma
- Cardiff
Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, Cymru/Wales, United Kingdom
| | - Alireza Ariafard
- School
of Natural Sciences-Chemistry, University
of Tasmania Private Bag 75, Hobart, Tasmania 7001, Australia
| | - Emma Richards
- Cardiff
Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, Cymru/Wales, United Kingdom
| | - Rebecca L. Melen
- Cardiff
Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, Cymru/Wales, United Kingdom
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Lozovskiy SV. Synthesis of heterocycles from allenes containing electron-withdrawing substituents under the conditions of electrophilic activation: recent advances. Chem Heterocycl Compd (N Y) 2020. [DOI: 10.1007/s10593-020-02741-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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8
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Zhang S, Tang A, Chen P, Zhao Z, Miao M, Ren H. Tunable Gold(I)-Catalyzed [4 + 3] Cycloaddition for Divergent Synthesis of Furan-Fused N,O-Heterocycles. Org Lett 2020; 22:848-853. [DOI: 10.1021/acs.orglett.9b04312] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shouzhi Zhang
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P. R. China
| | - Aijie Tang
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P. R. China
| | - Panpan Chen
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P. R. China
| | - Zhiqiang Zhao
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P. R. China
| | - Maozhong Miao
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P. R. China
| | - Hongjun Ren
- Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, P. R. China
- Advanced Research Institute and Department of Chemistry, Taizhou University, 1139 Shifu Avenue, Taizhou, Zhejiang 318000, P. R. China
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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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