1
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Singh S, Sharma P, Dutta S, Vishwakarma R, Hazra CK. An organocatalytic domino annulation approach via C(sp 2)-OMe cleavage to unlock the synthesis of pyranochromenones enabled by HFIP. Chem Commun (Camb) 2024; 60:7200-7203. [PMID: 38904468 DOI: 10.1039/d4cc01953a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/22/2024]
Abstract
Fused pyranochromenone derivatives have extensive applications in medicinal chemistry. Herein, we report the first HFIP/TsOH catalyzed, one-pot domino reaction by cleavage of the C(sp2)-OMe bond. Control experiments reveal that 1,3,5-trimethoxybenzene is rapidly protonated in the presence of HFIP to yield a dearomatized cationic diene intermediate. The gram-scale reaction and late-stage functionalization of natural products justified the practicality of this protocol.
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Affiliation(s)
- Sanjay Singh
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India.
| | - Pragya Sharma
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India.
| | - Sayantan Dutta
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India.
| | - Rahul Vishwakarma
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India.
| | - Chinmoy K Hazra
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India.
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2
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Muller C, Horký F, Vayer M, Golushko A, Lebœuf D, Moran J. Synthesis of functionalised isochromans: epoxides as aldehyde surrogates in hexafluoroisopropanol. Chem Sci 2023; 14:2983-2989. [PMID: 36937595 PMCID: PMC10016621 DOI: 10.1039/d2sc06692k] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 02/13/2023] [Indexed: 02/17/2023] Open
Abstract
The oxa-Pictet-Spengler reaction is arguably the most straightforward and modular way to construct the privileged isochroman motif, but its scope is largely limited to benzaldehyde derivatives and to electron-rich β-phenylethanols that lack substitution along the aliphatic chain. Here we describe a variant of this reaction starting from an epoxide, rather than an aldehyde, that greatly expands the scope and rate of the reaction (<1 h, 20 °C). Besides facilitating the initial Meinwald rearrangement, the use of hexafluoroisopropanol (HFIP) as a solvent expands the electrophile scope to include partners equivalent to ketones, aliphatic aldehydes, and phenylacetyl aldehydes, and the nucleophile scope to include modestly electronically deactivated and highly substituted β-phenylethanols. The products could be easily further derivatised in the same pot by subsequent ring-opening, reductions, and intra- and intermolecular Friedel-Crafts reactions, also in HFIP. Finally, owing to the high pharmacological relevance of the isochroman motif, the synthesis of drug analogues was demonstrated.
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Affiliation(s)
- Cyprien Muller
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS), CNRS UMR 7006, Université de Strasbourg 8 allée Gaspard Monge 67000 Strasbourg France
| | - Filip Horký
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS), CNRS UMR 7006, Université de Strasbourg 8 allée Gaspard Monge 67000 Strasbourg France
| | - Marie Vayer
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS), CNRS UMR 7006, Université de Strasbourg 8 allée Gaspard Monge 67000 Strasbourg France
| | - Andrei Golushko
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS), CNRS UMR 7006, Université de Strasbourg 8 allée Gaspard Monge 67000 Strasbourg France
| | - David Lebœuf
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS), CNRS UMR 7006, Université de Strasbourg 8 allée Gaspard Monge 67000 Strasbourg France
| | - Joseph Moran
- Institut de Science et d'Ingénierie Supramoléculaires (ISIS), CNRS UMR 7006, Université de Strasbourg 8 allée Gaspard Monge 67000 Strasbourg France
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3
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Singh A, Singh P, Nath M. Bronsted acidic surfactants: efficient organocatalysts for diverse organic transformations. PHYSICAL SCIENCES REVIEWS 2021. [DOI: 10.1515/psr-2021-0027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Organic transformations using efficient, atom-economical, cost-effective and environmentally benign strategies for the construction of diversified molecules have attracted synthetic chemists worldwide in recent years. These processes often minimize the waste production and avoid the use of hazardous flammable organic solvents. Among various green protocols, the procedures using surfactant-based catalytic systems have received a considerable attention in organic synthesis. In this context, Bronsted acidic surfactants have emerged as efficient catalysts for various C–C, C–O, C–N and C–S bond forming reactions. Many of these reactions occur in water, as Bronsted acidic surfactants have a unique ability of creating hydrophobic pocket through micelle formation in aqueous medium and the substrate molecules react efficiently to afford the targeted products in good yields. In the past, Bronsted acidic surfactant combined catalysts successfully displayed their potential to accelerate the reaction rates of diverse organic transformations. This chapter presents a complete overview on Bronsted acidic surfactants catalyzed organic reactions to construct a variety of aromatic and heteroaromatic molecular frameworks.
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Affiliation(s)
- Abhijeet Singh
- Department of Chemistry , Faculty of Science, University of Delhi , Delhi 110 007 , India
| | - Pargat Singh
- Department of Chemistry , Faculty of Science, University of Delhi , Delhi 110 007 , India
| | - Mahendra Nath
- Department of Chemistry , Faculty of Science, University of Delhi , Delhi 110 007 , India
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4
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Yang G, Li K, Zeng K, Li Y, Yu T, Liu Y. Heteropolyacid ionic liquid heterogeneously catalyzed synthesis of isochromans via oxa-Pictet-Spengler cyclization in dimethyl carbonate. RSC Adv 2021; 11:10610-10614. [PMID: 35423595 PMCID: PMC8695662 DOI: 10.1039/d1ra01004b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Accepted: 03/02/2021] [Indexed: 11/21/2022] Open
Abstract
A recyclable and efficient heterogeneous, green catalyst based on the synthesis of Keggin-type polyoxometalate (H3PMo12O40) and vitamin B1 analogue 3-ethyl-5-(2-hydroxyethyl)-4-methylthiazol-3-ium (HEMT), i.e., [HEMTH]H2[PMo12O40] was prepared. Oxa-Pictet–Spengler cyclization of arylethanols and aldehydes were catalyzed to afford various substituted isochromans in moderate conditions with excellent yields using dimethyl carbonate (DMC) as a green solvent. Furthermore, this protocol was applicable in a gram-scale reaction, and the catalyst could be recycled eight times without significant loss of activity. An efficient heterogeneous and green catalyst [HEMTH]H2[PMo12O40] was prepared to catalysis the oxa-Pictet–Spengler cyclization of arylethanols and aldehydes to afford isochromans with excellent yields using dimethyl carbonate as a green solvent.![]()
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Affiliation(s)
- Guoping Yang
- East China University of Technology, Jiangxi Province Key Laboratory of Synthetic Chemistry Nanchang 330013 People's Republic of China
| | - Ke Li
- East China University of Technology, Jiangxi Province Key Laboratory of Synthetic Chemistry Nanchang 330013 People's Republic of China
| | - Kai Zeng
- East China University of Technology, Jiangxi Province Key Laboratory of Synthetic Chemistry Nanchang 330013 People's Republic of China
| | - Yijin Li
- East China University of Technology, Jiangxi Province Key Laboratory of Synthetic Chemistry Nanchang 330013 People's Republic of China
| | - Tao Yu
- East China University of Technology, School of Nuclear Science and Engineering Nanchang 330013 China
| | - Yufeng Liu
- East China University of Technology, Jiangxi Province Key Laboratory of Synthetic Chemistry Nanchang 330013 People's Republic of China
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5
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Albano G, Morelli M, Lissia M, Aronica LA. Synthesis of Functionalised Indoline and Isoquinoline Derivatives through a Silylcarbocyclisation/Desilylation Sequence. ChemistrySelect 2019. [DOI: 10.1002/slct.201900524] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Gianluigi Albano
- Dipartimento di Chimica e Chimica Industriale; University of Pisa, Via G. Moruzzi 13; 56124 Pisa Italy Fax: (+)390502219260
| | - Martina Morelli
- Dipartimento di Chimica e Chimica Industriale; University of Pisa, Via G. Moruzzi 13; 56124 Pisa Italy Fax: (+)390502219260
| | - Margherita Lissia
- Dipartimento di Chimica e Chimica Industriale; University of Pisa, Via G. Moruzzi 13; 56124 Pisa Italy Fax: (+)390502219260
| | - Laura A. Aronica
- Dipartimento di Chimica e Chimica Industriale; University of Pisa, Via G. Moruzzi 13; 56124 Pisa Italy Fax: (+)390502219260
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6
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Richmond E, Yi J, Vuković VD, Sajadi F, Rowley CN, Moran J. Ring-opening hydroarylation of monosubstituted cyclopropanes enabled by hexafluoroisopropanol. Chem Sci 2018; 9:6411-6416. [PMID: 30310570 PMCID: PMC6115651 DOI: 10.1039/c8sc02126k] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Accepted: 06/28/2018] [Indexed: 12/21/2022] Open
Abstract
Ring-opening hydroarylation of cyclopropanes is typically limited to substrates bearing a donor-acceptor motif. Here, the transformation is achieved for monosubstituted cyclopropanes by using catalytic Brønsted acid in hexafluoroisopropanol (HFIP) solvent, constituting a rare example where such cyclopropanes engage in intermolecular C-C bond formation. Branched products are obtained when electron-rich arylcyclopropanes react with a broad scope of arene nucleophiles in accord with a simple SN1-type ring-opening mechanism. In contrast, linear products are obtained when cyclopropylketones react with electron-rich arene nucleophiles. In the latter case, mechanistic experiments and DFT-calculations support a homo-conjugate addition pathway.
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Affiliation(s)
- Edward Richmond
- University of Strasbourg , CNRS , ISIS UMR 7006 , 67000 Strasbourg , France .
| | - Jing Yi
- University of Strasbourg , CNRS , ISIS UMR 7006 , 67000 Strasbourg , France .
| | - Vuk D Vuković
- University of Strasbourg , CNRS , ISIS UMR 7006 , 67000 Strasbourg , France .
| | - Fatima Sajadi
- Memorial University of Newfoundland , 283 Prince Philip Drive , St. John's , NL , Canada A1B 3X7 .
| | - Christopher N Rowley
- Memorial University of Newfoundland , 283 Prince Philip Drive , St. John's , NL , Canada A1B 3X7 .
| | - Joseph Moran
- University of Strasbourg , CNRS , ISIS UMR 7006 , 67000 Strasbourg , France .
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7
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Richmond E, Vuković VD, Moran J. Nucleophilic Ring Opening of Donor-Acceptor Cyclopropanes Catalyzed by a Brønsted Acid in Hexafluoroisopropanol. Org Lett 2018; 20:574-577. [PMID: 29345947 DOI: 10.1021/acs.orglett.7b03688] [Citation(s) in RCA: 120] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A general, Brønsted acid catalyzed method for the room temperature, nucleophilic ring opening of donor-acceptor cyclopropanes in fluorinated alcohol solvent, HFIP, is described. Salient features of this method include an expanded cyclopropane scope, including those bearing single keto-acceptor groups and those bearing electron-deficient aryl groups. Notably, the catalytic system proved amenable to a wide range of nucleophiles including arenes, indoles, azides, diketones, and alcohols.
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Affiliation(s)
- Edward Richmond
- University of Strasbourg, CNRS, ISIS UMR 7006 , 67000 Strasbourg, France
| | - Vuk D Vuković
- University of Strasbourg, CNRS, ISIS UMR 7006 , 67000 Strasbourg, France
| | - Joseph Moran
- University of Strasbourg, CNRS, ISIS UMR 7006 , 67000 Strasbourg, France
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8
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Albano G, Aronica LA. Potentiality and Synthesis of O- and N-Heterocycles: Pd-Catalyzed Cyclocarbonylative Sonogashira Coupling as a Valuable Route to Phthalans, Isochromans, and Isoindolines. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701041] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Gianluigi Albano
- Dipartimento di Chimica e Chimica Industriale; University of Pisa; Via G. Moruzzi 13 56124 Pisa Italy
| | - Laura Antonella Aronica
- Dipartimento di Chimica e Chimica Industriale; University of Pisa; Via G. Moruzzi 13 56124 Pisa Italy
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9
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Catalytic Friedel-Crafts Reactions of Highly Electronically Deactivated Benzylic Alcohols. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201612573] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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10
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Vuković VD, Richmond E, Wolf E, Moran J. Catalytic Friedel-Crafts Reactions of Highly Electronically Deactivated Benzylic Alcohols. Angew Chem Int Ed Engl 2017; 56:3085-3089. [PMID: 28156038 DOI: 10.1002/anie.201612573] [Citation(s) in RCA: 134] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Indexed: 01/01/2023]
Abstract
Highly electronically deactivated benzylic alcohols, including those with a CF3 group adjacent to the OH-bearing carbon, undergo dehydrative Friedel-Crafts reactions upon exposure to catalytic Brønsted acid in 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP) solvent. Titration and kinetic experiments support the involvement of higher order solvent/acid clusters in catalysis.
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Affiliation(s)
- Vuk D Vuković
- University of Strasbourg, CNRS, ISIS UMR 7006, 67000, Strasbourg, France
| | - Edward Richmond
- University of Strasbourg, CNRS, ISIS UMR 7006, 67000, Strasbourg, France
| | - Eléna Wolf
- University of Strasbourg, CNRS, ISIS UMR 7006, 67000, Strasbourg, France
| | - Joseph Moran
- University of Strasbourg, CNRS, ISIS UMR 7006, 67000, Strasbourg, France
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11
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Zeng K, Huang Z, Yang J, Gu Y. Silica-supported policresulen as a solid acid catalyst for organic reactions. CHINESE JOURNAL OF CATALYSIS 2015. [DOI: 10.1016/s1872-2067(15)60910-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Aronica LA, Giannotti L, Giuntini S, Caporusso AM. Synthesis of 2-Alkylideneisochromans by Cyclocarbonylative Sonogashira Reactions. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402979] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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13
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One-Pot α-Amidosulfone-Mediated Variation of the Pictet-Spengler Tetrahydroisoquinoline Synthesis, Suitable for Amide-Type Substrates. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402487] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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14
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Wang LN, Shen SL, Qu J. Simple and efficient synthesis of tetrahydro-β-carbolines via the Pictet–Spengler reaction in 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP). RSC Adv 2014. [DOI: 10.1039/c4ra03628j] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
1,1,1,3,3,3-Hexafluoro-2-propanol (HFIP) can act as both the solvent and the catalyst to effectively promote the Pictet–Spengler reaction.
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Affiliation(s)
- Li-Na Wang
- State Key Laboratory of Elemento-Organic Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Nankai University
- Tianjin, China
| | - Su-Li Shen
- State Key Laboratory of Elemento-Organic Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Nankai University
- Tianjin, China
| | - Jin Qu
- State Key Laboratory of Elemento-Organic Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Nankai University
- Tianjin, China
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15
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Pandey AK, Sharma R, Singh A, Shukla S, Srivastava K, Puri SK, Kumar B, Chauhan PMS. Synthesis of biologically active pyridoimidazole/imidazobenzothiazole annulated polyheterocycles using cyanuric chloride in water. RSC Adv 2014. [DOI: 10.1039/c4ra03415e] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An efficient and mild protocol for rapid access to N-fused polyheterocycles via Pictet–Spengler type 6-endo cyclization by cyanuric chloride in aqueous medium has been developed.
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Affiliation(s)
- Anand Kumar Pandey
- Medicinal and Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow, India
| | - Rashmi Sharma
- Medicinal and Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow, India
| | - Awantika Singh
- Sophisticated Analytical Instrument Facility
- CSIR-Central Drug Research Institute
- Lucknow, India
| | - Sanjeev Shukla
- Sophisticated Analytical Instrument Facility
- CSIR-Central Drug Research Institute
- Lucknow, India
| | - Kumkum Srivastava
- Division of Parasitology
- CSIR-Central Drug Research Institute
- Lucknow, India
| | - Sunil K. Puri
- Division of Parasitology
- CSIR-Central Drug Research Institute
- Lucknow, India
| | - Brijesh Kumar
- Sophisticated Analytical Instrument Facility
- CSIR-Central Drug Research Institute
- Lucknow, India
| | - Prem M. S. Chauhan
- Medicinal and Process Chemistry Division
- CSIR-Central Drug Research Institute
- Lucknow, India
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16
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Simon RC, Busto E, Richter N, Belaj F, Kroutil W. Chemoenzymatic Synthesis of Enantiomerically Puresyn-Configured 1-Aryl-3-methylisochroman Derivatives. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301429] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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17
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Lombardo VM, Thomas CD, Scheidt KA. A Tandem Isomerization/Prins Strategy: Iridium(III)/Brønsted Acid Cooperative Catalysis. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201306462] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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18
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Lombardo VM, Thomas CD, Scheidt KA. A tandem isomerization/prins strategy: iridium(III)/Brønsted acid cooperative catalysis. Angew Chem Int Ed Engl 2013; 52:12910-4. [PMID: 24218144 DOI: 10.1002/anie.201306462] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2013] [Indexed: 02/03/2023]
Abstract
Working together: A mild and efficient isomerization/protonation sequence generates pyran-fused indoles by cooperative catalysis between cationic iridium(III) and Bi(OTf)3 . Three distinct cyclization manifolds lead to the corresponding bioactive scaffolds in good yields. In addition, N-substituted indoles can be synthesized enantioselectively in the presence of a chiral phosphate.
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Affiliation(s)
- Vince M Lombardo
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Chicago Tri-Institutional Center for Chemical Methods and Library Development (CT-CMLD), Northwestern University, 2145 Sheridan Road, Evanston, IL 60208 (USA)
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19
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20
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Affiliation(s)
- Soo J. Park
- School
of Chemistry and ‡Crystal Structure Analysis Facility, School of Chemistry, The University of Sydney, NSW 2006, Australia
| | - Jason R. Price
- School
of Chemistry and ‡Crystal Structure Analysis Facility, School of Chemistry, The University of Sydney, NSW 2006, Australia
| | - Matthew H. Todd
- School
of Chemistry and ‡Crystal Structure Analysis Facility, School of Chemistry, The University of Sydney, NSW 2006, Australia
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21
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Larghi EL, Kaufman TS. Synthesis of Oxacycles Employing the Oxa‐Pictet–Spengler Reaction: Recent Developments and New Prospects. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100271] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Enrique L. Larghi
- Institute of Chemistry of Rosario (IQUIR, CONICET‐UNR)and Department of Organic Chemistry, School of Pharmaceuticaland Biochemical Sciences, National University of Rosario, Suipacha 531 (S2002LRK) Rosario, Argentina, Fax: +54‐341‐4370477, ext. 35
| | - Teodoro S. Kaufman
- Institute of Chemistry of Rosario (IQUIR, CONICET‐UNR)and Department of Organic Chemistry, School of Pharmaceuticaland Biochemical Sciences, National University of Rosario, Suipacha 531 (S2002LRK) Rosario, Argentina, Fax: +54‐341‐4370477, ext. 35
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22
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Wang Y, Song Z, Chen C, Peng J. Pictet-Spengler condensation reactions catalyzed by a recyclable H+-montmorillonite as a heterogeneous Brønsted acid. Sci China Chem 2010. [DOI: 10.1007/s11426-010-0073-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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23
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Miklós F, Fülöp F. “Dry” and “Wet” Green Synthesis of 2,2′-Disubstituted Quinazolinones. European J Org Chem 2010. [DOI: 10.1002/ejoc.200901052] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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24
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Kobayashi K, Shikata K, Maegawa H, Fukamachi S, Tanmatsu M, Konishi H. Synthesis of Isochromans by Hydriodic Acid or Iodine Mediated Cyclization Reactions of 1-(2-Vinylphenyl)propan-2-ols. HETEROCYCLES 2010. [DOI: 10.3987/com-10-12021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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25
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Hatakeyama T, Chisaka Y, Kuroda C. Alkyl-Group Selection in an Acidic-Surfactant-Promoted Reaction of Homoallyl Alcohols and Aldehydes in Water. Helv Chim Acta 2009. [DOI: 10.1002/hlca.200800434] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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26
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Candeias NR, Branco LC, Gois PMP, Afonso CAM, Trindade AF. More Sustainable Approaches for the Synthesis of N-Based Heterocycles. Chem Rev 2009; 109:2703-802. [DOI: 10.1021/cr800462w] [Citation(s) in RCA: 292] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nuno R. Candeias
- Centro de Química-Física Molecular (CQFM) and Institute of Nanosciences and Nanotechnology (IN), Departamento de Engenharia Química e Biológica, Instituto Superior Técnico, 1049-001 Lisboa, Portugal, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa, Quinta da Torre, 2829-516 Caparica, Portugal, and iMed.UL, Faculdade de Farmácia da Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - Luís C. Branco
- Centro de Química-Física Molecular (CQFM) and Institute of Nanosciences and Nanotechnology (IN), Departamento de Engenharia Química e Biológica, Instituto Superior Técnico, 1049-001 Lisboa, Portugal, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa, Quinta da Torre, 2829-516 Caparica, Portugal, and iMed.UL, Faculdade de Farmácia da Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - Pedro M. P. Gois
- Centro de Química-Física Molecular (CQFM) and Institute of Nanosciences and Nanotechnology (IN), Departamento de Engenharia Química e Biológica, Instituto Superior Técnico, 1049-001 Lisboa, Portugal, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa, Quinta da Torre, 2829-516 Caparica, Portugal, and iMed.UL, Faculdade de Farmácia da Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - Carlos A. M. Afonso
- Centro de Química-Física Molecular (CQFM) and Institute of Nanosciences and Nanotechnology (IN), Departamento de Engenharia Química e Biológica, Instituto Superior Técnico, 1049-001 Lisboa, Portugal, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa, Quinta da Torre, 2829-516 Caparica, Portugal, and iMed.UL, Faculdade de Farmácia da Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - Alexandre F. Trindade
- Centro de Química-Física Molecular (CQFM) and Institute of Nanosciences and Nanotechnology (IN), Departamento de Engenharia Química e Biológica, Instituto Superior Técnico, 1049-001 Lisboa, Portugal, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa, Quinta da Torre, 2829-516 Caparica, Portugal, and iMed.UL, Faculdade de Farmácia da Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
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Ichikawa J, Ikeda M, Hattori M. Synthesis of Isochromanes and Isothiochromanes Bearing Fluorinated One-Carbon Units via Intramolecular Cyclizations of ortho-Substituted α-(Trifluoromethyl)styrenes. HETEROCYCLES 2009. [DOI: 10.3987/com-08-s(f)114] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Bismuth triflate-catalyzed oxa- and thia-Pictet–Spengler reactions: access to iso- and isothio-chroman compounds. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.07.007] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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SAITO A. Development of Novel Methods for Synthesis of Heterocyclic Compounds Catalyzed by Transition Metals in Fluorinated Alcohols. YAKUGAKU ZASSHI 2008; 128:1133-8. [DOI: 10.1248/yakushi.128.1133] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Akio SAITO
- Laboratory of Organic Reaction Chemistry, Showa Pharmaceutical University
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Kuhakarn C, Panyachariwat N, Ruchirawat S. A variation of the Pictet–Spengler reaction via a sequential reduction–cyclization reaction of N-acylcarbamates: synthesis of 1-substituted tetrahydroisoquinoline derivatives. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.09.073] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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