1
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Li YW, Lei J, Chen ZZ, Lv ML. Copper-catalyzed C2-selective alkynylation of chromones via 1,4-conjugate addition. Mol Divers 2024; 28:125-131. [PMID: 36881209 DOI: 10.1007/s11030-023-10625-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Accepted: 02/18/2023] [Indexed: 03/08/2023]
Abstract
Copper-catalyzed selective alkynylation with N-propargyl carboxamides as nucleophiles has been successfully developed for the synthesis of C2-functionalized chromanones. Under optimized reaction conditions, 21 examples were obtained in one-pot procedure through 1,4-conjugate addition. This protocol features readily available feedstocks, easy operations, and moderate to good yields, which provides viable access to pharmacologically active C2-functionalized chromanones.
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Affiliation(s)
- Yan-Wu Li
- School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, 550025, China
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, IATTI, Chongqing University of Arts and Sciences, Chongqing, 402160, China
| | - Jie Lei
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, IATTI, Chongqing University of Arts and Sciences, Chongqing, 402160, China.
| | - Zhong-Zhu Chen
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, IATTI, Chongqing University of Arts and Sciences, Chongqing, 402160, China.
| | - Meng-Lan Lv
- School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, 550025, China.
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2
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Guan Y, Buivydas TA, Lalisse RF, Laybourn KB, Stern C, Richins M, Burns SM, Shelby A, Hadad CM, Mattson AE. Highly Enantioselective Catalytic Alkynylation of Quinolones: Substrate Scope, Mechanistic Studies, and Applications in the Syntheses of Chiral N-Heterocyclic Alkaloids and Diamines. ACS Catal 2023; 13:7661-7668. [PMID: 37288090 PMCID: PMC10243307 DOI: 10.1021/acscatal.3c01536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 04/21/2023] [Indexed: 06/09/2023]
Abstract
The alkynylation of 4-siloxyquinolinium triflates has been achieved under the influence of copper bis(oxazoline) catalysis. The identification of the optimal bis(oxazoline) ligand was informed through a computational approach that enabled the dihydroquinoline products to be produced with up to 96% enantiomeric excess. The conversions of the dihydroquinoline products to biologically relevant and diverse targets are reported.
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Affiliation(s)
- Yong Guan
- Department
of Chemistry and Biochemistry, Worcester
Polytechnic Institute, 60 Prescott Street, Worcester, Massachusetts 01609, United States
| | - Tadas A. Buivydas
- Department
of Chemistry and Biochemistry, Worcester
Polytechnic Institute, 60 Prescott Street, Worcester, Massachusetts 01609, United States
| | - Remy F. Lalisse
- Department
of Chemistry and Biochemistry, The Ohio
State University, Columbus, Ohio 43210, United States
| | - Kalen B. Laybourn
- Department
of Chemistry and Biochemistry, Worcester
Polytechnic Institute, 60 Prescott Street, Worcester, Massachusetts 01609, United States
| | - Charlotte Stern
- Integrated
Molecular Structure Education and Research Center, Northwestern University, Evanston, Illinois 60208, United States
| | - Margaret Richins
- Department
of Chemistry and Biochemistry, Worcester
Polytechnic Institute, 60 Prescott Street, Worcester, Massachusetts 01609, United States
| | - Sean M. Burns
- Department
of Chemistry and Biochemistry, Worcester
Polytechnic Institute, 60 Prescott Street, Worcester, Massachusetts 01609, United States
| | - Arielle Shelby
- Department
of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Christopher M. Hadad
- Department
of Chemistry and Biochemistry, The Ohio
State University, Columbus, Ohio 43210, United States
| | - Anita E. Mattson
- Department
of Chemistry and Biochemistry, Worcester
Polytechnic Institute, 60 Prescott Street, Worcester, Massachusetts 01609, United States
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3
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Joshi H, Thomas AA, Mague JT, Sathyamoorthi S. Dancing Silanols: Stereospecific Rearrangements of Silanol Epoxides into Silanoxy-Tetrahydrofurans and Silanoxy-Tetrahydropyrans. Org Chem Front 2023; 10:2556-2562. [PMID: 38037597 PMCID: PMC10688609 DOI: 10.1039/d3qo00427a] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2023]
Abstract
We have developed highly stereospecific rearrangements of silanol epoxides into 1'-silanoxy-tetrahydrofurans and 1'-silanoxy-tetrahydropyrans. Upon treatment with Ph3CBF4 and NaHCO3 in CH2Cl2, di-substituted trans-epoxide silanols rearrange into products with an erythro configuration; di-substituted cis-epoxide silanols give products with a threo configuration. We have used these reactions as key steps in the syntheses of (±)-solerone and (±)-muricatacin.
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Affiliation(s)
- Harshit Joshi
- University of Kansas, Department of Medicinal Chemistry, Lawrence, KS, USA (66047)
| | - Annu Anna Thomas
- University of Kansas, Department of Medicinal Chemistry, Lawrence, KS, USA (66047)
| | - Joel T Mague
- Tulane University, Department of Chemistry, New Orleans, LA, USA (70118)
| | - Shyam Sathyamoorthi
- University of Kansas, Department of Medicinal Chemistry, Lawrence, KS, USA (66047)
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4
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Aleksiev M, García Mancheño O. Enantioselective dearomatization reactions of heteroarenes by anion-binding organocatalysis. Chem Commun (Camb) 2023; 59:3360-3372. [PMID: 36790499 PMCID: PMC10019134 DOI: 10.1039/d2cc07101k] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Catalytic asymmetric dearomatization of heteroaromatic compounds has received considerable attention in the last few years, since it allows for a fast expansion of the chemical space by converting relatively simple, flat molecules into complex, three dimensional structures with added value. Among different approaches, remarkable progress has been recently achieved by the development of organocatalytic dearomatization methods. In particular, the anion-binding catalysis technology has emerged as a potent alternative to metal catalysis, which together with the design of novel, tunable anion-receptor motifs, has provided new entries for the enantioselective dearomatization of heteroarenes through a chiral contact ion pair formation by activation of the electrophilic reaction partner. In this feature, we provide an overview of the different methodologies and advances in anion-binding catalyzed dearomatization reactions of different heteroarenes.
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Affiliation(s)
- Martin Aleksiev
- Organic Chemistry Institute, University of Münster, Corrensstraße 36/40, 48149 Münster, Germany.
| | - Olga García Mancheño
- Organic Chemistry Institute, University of Münster, Corrensstraße 36/40, 48149 Münster, Germany.
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5
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Zhang XX, Gao Y, Zhang YX, Zhou J, Yu JS. Highly Enantioselective Construction of Multifunctional Silicon-Stereogenic Silacycles by Asymmetric Enamine Catalysis. Angew Chem Int Ed Engl 2023; 62:e202217724. [PMID: 36625565 DOI: 10.1002/anie.202217724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 01/09/2023] [Accepted: 01/10/2023] [Indexed: 01/11/2023]
Abstract
We report the first highly enantioselective construction of silicon-stereocenters by asymmetric enamine catalysis. An unprecedented desymmetric intramolecular aldolization of prochiral siladials was thus developed for the facile access of multifunctional silicon-stereogenic silacycles in high to excellent enantioselectivity. With an enal moiety, these adducts could be readily elaborated for the diverse synthesis of silicon-stereogenic compounds, and for late-stage modification.
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Affiliation(s)
- Xue-Xin Zhang
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Key Laboratory of Green Chemistry and Chemical Process, East China Normal University, Shanghai, 200062, China
| | - Yang Gao
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Key Laboratory of Green Chemistry and Chemical Process, East China Normal University, Shanghai, 200062, China
| | - Yan-Xue Zhang
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Key Laboratory of Green Chemistry and Chemical Process, East China Normal University, Shanghai, 200062, China
| | - Jian Zhou
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Key Laboratory of Green Chemistry and Chemical Process, East China Normal University, Shanghai, 200062, China.,Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Hainan Normal University, Haikou, 571158, China
| | - Jin-Sheng Yu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Key Laboratory of Green Chemistry and Chemical Process, East China Normal University, Shanghai, 200062, China.,Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Hainan Normal University, Haikou, 571158, China
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6
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Adili A, Webster JP, Zhao C, Mallojjala SC, Romero-Reyes MA, Ghiviriga I, Abboud KA, Vetticatt MJ, Seidel D. Mechanism of a Dually Catalyzed Enantioselective Oxa-Pictet-Spengler Reaction and the Development of a Stereodivergent Variant. ACS Catal 2023; 13:2240-2249. [PMID: 37711191 PMCID: PMC10501388 DOI: 10.1021/acscatal.2c05484] [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: 01/28/2023]
Abstract
Enantioselective oxa-Pictet-Spengler reactions of tryptophol with aldehydes proceed under weakly acidic conditions utilizing a combination of two catalysts, an indoline HCl salt and a bisthiourea compound. Mechanistic investigations revealed the roles of both catalysts and confirmed the involvement of oxocarbenium ion intermediates, ruling out alternative scenarios. A stereochemical model was derived from density functional theory calculations, which provided the basis for the development of a highly enantioselective stereodivergent variant with racemic tryptophol derivatives.
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Affiliation(s)
- Alafate Adili
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - John-Paul Webster
- Department of Chemistry, Binghamton University, Binghamton, New York 13902, United States
| | - Chenfei Zhao
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | | | - Moises A Romero-Reyes
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Ion Ghiviriga
- Center for NMR Spectroscopy, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Khalil A Abboud
- Center for X-ray Crystallography, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Mathew J Vetticatt
- Department of Chemistry, Binghamton University, Binghamton, New York 13902, United States
| | - Daniel Seidel
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
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7
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Ali R, Parelkar SS, Thompson PR, Mitroka-Batsford S, Yerramilli S, Scarlata SF, Mistretta KS, Coburn JM, Mattson AE. Phomoxanthone A Targets ATP Synthase. Chemistry 2022; 28:e202202397. [PMID: 36082977 PMCID: PMC9942271 DOI: 10.1002/chem.202202397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Indexed: 11/06/2022]
Abstract
Phomoxanthone A is a naturally occurring molecule and a powerful anti-cancer agent, although its mechanism of action is unknown. To facilitate the determination of its biological target(s), we used affinity-based labelling using a phomoxanthone A probe. Labelled proteins were pulled down, subjected to chemoproteomics analysis using LC-MS/MS and ATP synthase was identified as a likely target. Mitochondrial ATP synthase was validated in cultured cells lysates and in live intact cells. Our studies show sixty percent inhibition of ATP synthase by 260 μM phomoxanthone A.
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Affiliation(s)
- Rameez Ali
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, 60 Prescott St., Worcester, MA 01609, USA
| | - Sangram S Parelkar
- Department of Chemical Biology, University of Massachusetts Medical School, 364 Plantation St., Wocester, MA 01605, USA
| | - Paul R Thompson
- Department of Chemical Biology, University of Massachusetts Medical School, 364 Plantation St., Wocester, MA 01605, USA
| | - Susan Mitroka-Batsford
- Department of Chemistry and Biochemistry, Worcester State University, 486 Chandler St., Worcester, MA 10602, USA
| | - Siddartha Yerramilli
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, 60 Prescott St., Worcester, MA 01609, USA
| | - Suzanne F Scarlata
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, 60 Prescott St., Worcester, MA 01609, USA
| | - Katelyn S Mistretta
- Department of Biomedical Engineering, Worcester Polytechnic Institute, 60 Prescott St., Worcester, MA 01609, USA
| | - Jeannine M Coburn
- Department of Biomedical Engineering, Worcester Polytechnic Institute, 60 Prescott St., Worcester, MA 01609, USA
| | - Anita E Mattson
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, 60 Prescott St., Worcester, MA 01609, USA
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8
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Leveille AN, Allegrezza MM, Laybourn K, Mattson AE. Dearomatization of benzopyrylium triflates with sulfoxonium ylides. Chem Commun (Camb) 2022; 58:12600-12603. [PMID: 36285765 PMCID: PMC9885494 DOI: 10.1039/d2cc02023h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Benzopyrylium triflates react with sulfoxonium ylides to give rise to cyclopropanated products in up to 90% yield as a single diastereomer. The cyclopropanated products can easily undergo acid-mediated ring-expansion to afford benzo[b]oxepines. Control over the absolute stereochemistry of the process is possible when the reaction is executed under the influence of a suitable anion-binding catalyst.
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Affiliation(s)
- Alexandria N Leveille
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA, 01609, USA.
| | - Marissa M Allegrezza
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA, 01609, USA.
| | - Kalen Laybourn
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA, 01609, USA.
| | - Anita E Mattson
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA, 01609, USA.
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9
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Zhang Y, Xu Z, Zhan L, Gao Y, Zheng B, Zhou Y, Sheng Y, Liang G, Song Z. Design, synthesis and biological evaluation of novel chromone-maleimide hybrids as potent anti-inflammatory agents against LPS-induced acute lung injury. Bioorg Chem 2022; 128:106049. [DOI: 10.1016/j.bioorg.2022.106049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 07/06/2022] [Accepted: 07/20/2022] [Indexed: 11/02/2022]
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10
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Guan Y, Buivydas T, Lalisse RF, Ali R, Hadad C, Mattson AE. Enantioselective Dearomative Alkynylation of Chromanones: Opportunities and Obstacles. SYNTHESIS-STUTTGART 2022; 54:4210-4219. [PMID: 36744023 PMCID: PMC9897304 DOI: 10.1055/a-1811-8075] [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: 02/07/2023]
Abstract
A catalytic and highly enantioselective dearomative alkynylation of chromanones has been discovered that enables the construction of biologically relevant tertiary ether stereogenic centers. This methodology is robust, accommodating a variety of alkynes and chromanones. More than 40 substrates tested gave rise to >90% ee. Computational studies have indicated that the optimal indanyl ligand identified for most cases likely affords a network of supportive, non-covalent interactions that drive the enantioselective nature of the reaction.
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Affiliation(s)
- Yong Guan
- Worcester Polytechnic Institute, Worcester, MA 01609
| | | | | | - Rameez Ali
- Worcester Polytechnic Institute, Worcester, MA 01609
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11
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Liu YC, Chen P, Li XJ, Xiong BQ, Liu Y, Tang KW, Huang PF. Visible-Light-Induced Dual Acylation of Alkenes for the Construction of 3-Substituted Chroman-4-ones. J Org Chem 2022; 87:4263-4272. [PMID: 35234478 DOI: 10.1021/acs.joc.1c03100] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Heterocyclic compounds, especially oxygen-containing heterocyclic compounds, are crucial moieties in bioactive compounds and drug leads. Substituted chroman-4-ones are a kind of the most significant structural skeletons. Herein, we report a visible-light-induced dual acylation of alkenes for constructing 3-substituted chroman-4-ones, which undergoes a radical tandem cyclization reaction through carbon-carbon bond cleavage of oxime esters by a nitrogen-centered radical strategy. A series of 3-substituted chroman-4-ones were prepared with up to 86% yield.
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Affiliation(s)
- Yi-Chen Liu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Pu Chen
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Xue-Jiao Li
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Bi-Quan Xiong
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Yu Liu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Ke-Wen Tang
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Peng-Fei Huang
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
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12
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Kondo SI, Okada N, Abe S, Tanaka R, Yamamura M, Unno M. Anion recognition by silanetriol in acetonitrile. Org Biomol Chem 2022; 20:8925-8931. [DOI: 10.1039/d2ob01596j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Anion recognition ability and organocatalytic activity of a silanetriol are firstly presented by comparing with those of a series of silanol derivatives.
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Affiliation(s)
- Shin-ichi Kondo
- Department of Chemistry, Faculty of Science, Yamagata University, Yamagata 990-8560, Japan
| | - Natsumi Okada
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu, Gunma 376-8515, Japan
| | - Shiori Abe
- Department of Chemistry, Faculty of Science, Yamagata University, Yamagata 990-8560, Japan
| | - Ryoji Tanaka
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu, Gunma 376-8515, Japan
- Sagami Chemical Research Institute, Hayakawa 2743-1, Ayase, Kanagawa 252-1193, Japan
| | - Masaki Yamamura
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu, Gunma 376-8515, Japan
- Faculty of Engineering, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan
| | - Masafumi Unno
- Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu, Gunma 376-8515, Japan
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13
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Nagamalla S, Dhokale RA, Seidl FJ, Mague JT, Sathyamoorthi S. Unusual Rearrangement-Remercuration Reactions of Allylic Silanols. Org Chem Front 2021; 8:5361-5368. [PMID: 34868598 DOI: 10.1039/d1qo01008e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
We present the first examples of rearrangement reactions of allylic silanol substrates into linear ketone and 5-membered cyclic silanediol organomercurial products. Both reactions are mediated by Hg(OTf)2 but differ in the use of base, solvent, and temperature. The substrate scope of both transformations was explored, and the product organomercurials were shown to be valuable synthons. Mechanistic studies suggest that both products are the result of a series of transformations, cascading in one pot. DFT analysis provides a basis for understanding the rearrangement of a 6-endo intermediate into the 5-exo cyclic silanediol product.
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Affiliation(s)
- Someshwar Nagamalla
- Department of Medicinal Chemistry, University of Kansas, Lawrence, Kansas, United States, 66047
| | - Ranjeet A Dhokale
- Department of Medicinal Chemistry, University of Kansas, Lawrence, Kansas, United States, 66047
| | | | - Joel T Mague
- Department of Chemistry, Tulane University, New Orleans, Louisiana, United States, 70118
| | - Shyam Sathyamoorthi
- Department of Medicinal Chemistry, University of Kansas, Lawrence, Kansas, United States, 66047
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14
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Kaur K, Humbrías-Martín J, Hoppmann L, Fernández-Salas JA, Daniliuc CG, Alemán J, Mancheño OG. Enantioselective vinylogous-Mukaiyama-type dearomatisation by anion-binding catalysis. Chem Commun (Camb) 2021; 57:9244-9247. [PMID: 34519302 PMCID: PMC8438702 DOI: 10.1039/d1cc03514b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 07/26/2021] [Indexed: 01/08/2023]
Abstract
The first enantioselective vinylogous Mukaiyama-type dearomatisation of heteroarenes under anion-binding catalysis is presented. A recyclable tetrakistriazole catalyst was used for the enantiocontrol of the remote vinylogous active position of silyl dienol ethers. This approach provided chiral heterocycles bearing α,β-unsaturated chains with complete regioselectivity and excellent enantioselectivities (up to 97.5 : 2.5 e.r.).
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Affiliation(s)
- Kirandeep Kaur
- Organic Chemistry Institute, University of Münster, 48149 Münster, Germany.
| | - Jorge Humbrías-Martín
- Organic Chemistry Department (Module 1), Facultad de Ciencias, Universidad Autónoma de Madrid, 28049 - Madrid, Spain.
| | - Leon Hoppmann
- Organic Chemistry Institute, University of Münster, 48149 Münster, Germany.
| | - Jose A Fernández-Salas
- Organic Chemistry Department (Module 1), Facultad de Ciencias, Universidad Autónoma de Madrid, 28049 - Madrid, Spain.
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 - Madrid, Spain
| | | | - José Alemán
- Organic Chemistry Department (Module 1), Facultad de Ciencias, Universidad Autónoma de Madrid, 28049 - Madrid, Spain.
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 - Madrid, Spain
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15
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Du Y, Wang Y, Zhao Q, Zhao L. Selective Synthesis of 5‐Alkylated and 5‐Alkenylated Chromones via Catalytic C‐H Coupling of Chromones with Allyl Alcohols. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100213] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Ya‐Zhen Du
- School of Chemistry and Materials Science Jiangsu Normal University Xuzhou 221116 Jiangsu China
| | - Yu‐Jiao Wang
- School of Chemistry and Materials Science Jiangsu Normal University Xuzhou 221116 Jiangsu China
| | - Qing‐Yang Zhao
- School of Chemistry and Materials Science Jiangsu Normal University Xuzhou 221116 Jiangsu China
| | - Li‐Ming Zhao
- School of Chemistry and Materials Science Jiangsu Normal University Xuzhou 221116 Jiangsu China
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines Institute of Materia Medica Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100050 China
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16
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DMAP-catalyzed decarboxylative [3+2] cycloadditions: A strategy for diastereoselective synthesis of trifluoromethylated chromanone-fused pyrrolidinyl spirooxindoles. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131678] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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17
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Chen W, Ang ECX, Tan SM, Chua Z, Ren J, Yang Z, Teng B, Lee R, Lu H, Tan CH. Enantioselective Addition-Alkylation of α,β-Unsaturated Carbonyls via Bisguanidinium Silicate Ion Pair Catalysis. J Am Chem Soc 2020; 142:19065-19070. [PMID: 33119296 DOI: 10.1021/jacs.0c00183] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Silicon hydrides, alkynylsilanes, and alkoxylsilanes were activated by fluoride in the presence of bisguanidinium catalyst to form hypervalent silicate ion pairs. These activated silicates undergo 1,4-additions with chromones, coumarins, and α-cyanocinnamic esters generating enolsilicate intermediates, for a consequent stereoselective alkylation reaction. The reduction-alkylation reaction proceeded under mild conditions using polymethylhydrosiloxane, a cheap and environmentally friendly hydride source. The addition-alkylation reactions with alkynylsilanes and alkoxylsilanes resulted in the construction of two vicinal chiral carbon centers with excellent enantioselectivities and diastereoselectivities (up to 99% ee, >99:1 dr). Density functional theory calculations and experimental NMR studies revealed that penta-coordinated silicates are crucial intermediates.
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Affiliation(s)
- Wenchao Chen
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore
| | - Esther Cai Xia Ang
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore
| | - Siu Min Tan
- Division of Science and Math, Singapore University of Technology and Design, 8 Somapah Road, 487372 Singapore
| | - Zhijie Chua
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore
| | - Jingyun Ren
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore
| | - Ziqi Yang
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore
| | - Bo Teng
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore
| | - Richmond Lee
- School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Haihua Lu
- Westlake Institute for Advanced Study, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, China
| | - Choon-Hong Tan
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore
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18
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Yao Z, Liu X, Li Z, Xu S, Xu L, Liu X. Dienolate‐Mediated, Regioselective C2‐Polarity Reversal of Chromone‐Based Reactants and Their Application in Nucleophilic Strategies. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000942] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Zhen Yao
- Department of Chemistry Renmin University of China Beijing 100872 People's Republic of China
| | - Xiong‐Wei Liu
- Guizhou Engineering Center for Innovative Traditional Chinese Medicine and Ethnic Medicine Guizhou University Guiyang 550025 People's Republic of China
| | - Zheng Li
- Guizhou Engineering Center for Innovative Traditional Chinese Medicine and Ethnic Medicine Guizhou University Guiyang 550025 People's Republic of China
| | - Sheng‐Wen Xu
- Guizhou Engineering Center for Innovative Traditional Chinese Medicine and Ethnic Medicine Guizhou University Guiyang 550025 People's Republic of China
| | - Lijin Xu
- Department of Chemistry Renmin University of China Beijing 100872 People's Republic of China
| | - Xiong‐Li Liu
- Guizhou Engineering Center for Innovative Traditional Chinese Medicine and Ethnic Medicine Guizhou University Guiyang 550025 People's Republic of China
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19
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Zhu Z, Odagi M, Supantanapong N, Xu W, Saame J, Kirm HU, Abboud KA, Leito I, Seidel D. Modular Design of Chiral Conjugate-Base-Stabilized Carboxylic Acids: Catalytic Enantioselective [4 + 2] Cycloadditions of Acetals. J Am Chem Soc 2020; 142:15252-15258. [PMID: 32830974 DOI: 10.1021/jacs.0c07212] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Readily available 1,2-amino alcohols provide the framework for a new generation of chiral carboxylic acid catalysts that rival the acidity of the widely used chiral phosphoric acid catalyst (S)-TRIP. Covalently linked thiourea sites stabilize the carboxylate conjugate bases of these catalysts via anion-binding, an interaction that is largely responsible for the low pKa values. The utility of the new catalysts is illustrated in the context of challenging [4 + 2] cycloadditions of salicylaldehyde-derived acetals with homoallylic and bishomoallylic alcohols, providing polycyclic chromanes in a highly enantioselective fashion.
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Affiliation(s)
- Zhengbo Zhu
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Minami Odagi
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States.,Department of Biotechnology and Life Science, Graduate School of Technology, Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei city, 184-8588, Tokyo, Japan
| | - Nantamon Supantanapong
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Weici Xu
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Jaan Saame
- Institute of Chemistry, University of Tartu, Tartu, Estonia
| | | | - Khalil A Abboud
- Center for X-ray Crystallography, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Ivo Leito
- Institute of Chemistry, University of Tartu, Tartu, Estonia
| | - Daniel Seidel
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
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20
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Momo PB, Leveille AN, Farrar EHE, Grayson MN, Mattson AE, Burtoloso ACB. Enantioselective S-H Insertion Reactions of α-Carbonyl Sulfoxonium Ylides. Angew Chem Int Ed Engl 2020; 59:15554-15559. [PMID: 32352184 PMCID: PMC7606806 DOI: 10.1002/anie.202005563] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Indexed: 12/20/2022]
Abstract
The first example of enantioselective S-H insertion reactions of sulfoxonium ylides is reported. Under the influence of thiourea catalysis, excellent levels of enantiocontrol (up to 95 % ee) and yields (up to 97 %) are achieved for 31 examples in S-H insertion reactions of aryl thiols and α-carbonyl sulfoxonium ylides.
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Affiliation(s)
- Patrícia B. Momo
- Institute of Chemistry of São CarlosUniversity of São PauloCEP 13560-970São CarlosSPBrazil
| | - Alexandria N. Leveille
- Department Chemistry and BiochemistryWorcester Polytechnic Institute100 Institute RoadWorcesterMA01609USA
| | | | | | - Anita E. Mattson
- Department Chemistry and BiochemistryWorcester Polytechnic Institute100 Institute RoadWorcesterMA01609USA
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21
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Zhou Y, Liang H, Sheng Y, Wang S, Gao Y, Zhan L, Zheng Z, Yang M, Liang G, Zhou J, Deng J, Song Z. Ruthenium(II)-Catalyzed C-H Activation of Chromones with Maleimides to Synthesize Succinimide/Maleimide-Containing Chromones. J Org Chem 2020; 85:9230-9243. [PMID: 32578431 DOI: 10.1021/acs.joc.0c01223] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
An efficient route for the coupling of maleimides with chromones at the C5-position has been developed under Ru(II) catalysis. It could provide 1,4-addition products and oxidative Heck-type products by switching additives. Benzoic acid led to the formation of 1,4-addition products under solvent-free conditions, and silver acetate was promoted to the generation of oxidative Heck-type products. Various maleimides and chromones were suitable for this transformation, affording the desired products with good to excellent yields in a short reaction time. To understand the mechanism of this reaction, deuteration studies and control experiments have been performed.
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Affiliation(s)
- Yan Zhou
- Chemical Biology Research Center at School of Pharmaceutical Sciences, Wenzhou Medical University, 1210 University Town, Wenzhou, Zhejiang 325035, China
| | - Hong Liang
- State Key Laboratory of Phytochemistry and Plant Resources in West China and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan 650201, China
| | - Yaoguang Sheng
- Chemical Biology Research Center at School of Pharmaceutical Sciences, Wenzhou Medical University, 1210 University Town, Wenzhou, Zhejiang 325035, China
| | - Shaoli Wang
- Chemical Biology Research Center at School of Pharmaceutical Sciences, Wenzhou Medical University, 1210 University Town, Wenzhou, Zhejiang 325035, China
| | - Yi Gao
- Chemical Biology Research Center at School of Pharmaceutical Sciences, Wenzhou Medical University, 1210 University Town, Wenzhou, Zhejiang 325035, China
| | - Lingling Zhan
- The First Affiliated Hospital, Wenzhou Medical University, 1210 University Town, Wenzhou, Zhejiang 325035, China
| | - Zhilong Zheng
- Chemical Biology Research Center at School of Pharmaceutical Sciences, Wenzhou Medical University, 1210 University Town, Wenzhou, Zhejiang 325035, China
| | - Mengjie Yang
- Chemical Biology Research Center at School of Pharmaceutical Sciences, Wenzhou Medical University, 1210 University Town, Wenzhou, Zhejiang 325035, China
| | - Guang Liang
- Chemical Biology Research Center at School of Pharmaceutical Sciences, Wenzhou Medical University, 1210 University Town, Wenzhou, Zhejiang 325035, China
| | - Jianmin Zhou
- Chemical Biology Research Center at School of Pharmaceutical Sciences, Wenzhou Medical University, 1210 University Town, Wenzhou, Zhejiang 325035, China
| | - Jun Deng
- State Key Laboratory of Phytochemistry and Plant Resources in West China and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan 650201, China
| | - Zengqiang Song
- Chemical Biology Research Center at School of Pharmaceutical Sciences, Wenzhou Medical University, 1210 University Town, Wenzhou, Zhejiang 325035, China
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22
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Kerste E, Beller MP, Koert U. Second Generation Total Synthesis of (–)‐Preussochromone D. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000465] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Eric Kerste
- Fachbereich Chemie Philipps‐Universität Marburg Hans‐Meerwein Strasse 4 35032 Marburg Germany
| | - Marc Paul Beller
- Fachbereich Chemie Philipps‐Universität Marburg Hans‐Meerwein Strasse 4 35032 Marburg Germany
| | - Ulrich Koert
- Fachbereich Chemie Philipps‐Universität Marburg Hans‐Meerwein Strasse 4 35032 Marburg Germany
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23
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Momo PB, Leveille AN, Farrar EHE, Grayson MN, Mattson AE, Burtoloso ACB. Enantioselective S−H Insertion Reactions of α‐Carbonyl Sulfoxonium Ylides. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202005563] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Patrícia B. Momo
- Institute of Chemistry of São Carlos University of São Paulo CEP 13560-970 São Carlos SP Brazil
| | - Alexandria N. Leveille
- Department Chemistry and Biochemistry Worcester Polytechnic Institute 100 Institute Road Worcester MA 01609 USA
| | | | - Matthew N. Grayson
- Department of Chemistry University of Bath Claverton Down Bath BA2 7AY UK
| | - Anita E. Mattson
- Department Chemistry and Biochemistry Worcester Polytechnic Institute 100 Institute Road Worcester MA 01609 USA
| | - Antonio C. B. Burtoloso
- Institute of Chemistry of São Carlos University of São Paulo CEP 13560-970 São Carlos SP Brazil
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24
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Baek D, Ryu H, Ryu JY, Lee J, Stoltz BM, Hong S. Catalytic enantioselective synthesis of tetrasubstituted chromanones via palladium-catalyzed asymmetric conjugate arylation using chiral pyridine-dihydroisoquinoline ligands. Chem Sci 2020; 11:4602-4607. [PMID: 33133484 PMCID: PMC7574023 DOI: 10.1039/d0sc00412j] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 04/07/2020] [Indexed: 11/21/2022] Open
Abstract
Highly enantioselective conjugate addition reactions of arylboronic acids to 2-substituted chromones catalyzed by palladium complexes with new chiral Pyridine-Dihydroisoquinoline (PyDHIQ) ligands have been developed. These reactions provide highly enantioselective access to chromanones containing tetrasubstituted stereocenters. Various arylboronic acids and 2-substituted chromones can be used in the catalytic reaction to afford the chiral tetrasubstituted chromanones in good yields and excellent enantioselectivities (25 examples, up to 98% yields, up to 99% ee).
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Affiliation(s)
- Doohyun Baek
- Department of Chemistry , Gwangju Institute of Science and Technology , 123 Cheomdan-gwagiro, Buk-gu , Gwangju 61005 , Republic of Korea .
| | - Huijeong Ryu
- Department of Chemistry , Gwangju Institute of Science and Technology , 123 Cheomdan-gwagiro, Buk-gu , Gwangju 61005 , Republic of Korea .
| | - Ji Yeon Ryu
- Department of Chemistry , Chonnam National University , 77 Yongbong-ro, Buk-gu , Gwangju 61186 , Republic of Korea
| | - Junseong Lee
- Department of Chemistry , Chonnam National University , 77 Yongbong-ro, Buk-gu , Gwangju 61186 , Republic of Korea
| | - Brian M Stoltz
- The Warren and Katharine Schlinger Laboratory of Chemistry and Chemical Engineering , Division of Chemistry and Chemical Engineering , California Institute of Technology , Pasadena , CA 91125 , USA .
| | - Sukwon Hong
- Department of Chemistry , Gwangju Institute of Science and Technology , 123 Cheomdan-gwagiro, Buk-gu , Gwangju 61005 , Republic of Korea .
- School of Materials Science and Engineering , Gwangju Institute of Science and Technology , 123 Cheomdan-gwagiro, Buk-gu , Gwangju 61005 , Republic of Korea
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25
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Huang HL, Du JY, Li QL, Gao F, Ma CL. Visible-Light-Promoted Cascade Radical Cyclization: Synthesis of Chroman-4-ones and Dihydroquinolin-4-ones. J Org Chem 2020; 85:3963-3972. [PMID: 32037828 DOI: 10.1021/acs.joc.9b03253] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A novel visible-light photoredox catalysis protocol for the effective and efficient synthesis of 3-substituted chroman-4-ones and 2,3-dihydroquinolin-4(1H)-ones via tandem radical addition/cyclization of alkenyl aldehydes has been described. This reaction features a broad substrate scope, mild reaction conditions, and good functional group tolerance character.
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Affiliation(s)
- Hong-Li Huang
- College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
| | - Ji-Yuan Du
- College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
| | - Qian-Li Li
- College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
| | - Fei Gao
- Institude of Translation Medicine, Shanghai University, Shanghai, 2004444, China
| | - Chun-Lin Ma
- College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, Shandong 252059, China
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26
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Guan Y, Attard JW, Mattson AE. Copper Bis(oxazoline)-Catalyzed Enantioselective Alkynylation of Benzopyrylium Ions. Chemistry 2020; 26:1742-1747. [PMID: 31867810 DOI: 10.1002/chem.201904822] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Indexed: 12/25/2022]
Abstract
The stereocontrolled construction of biologically relevant chromanones and tetrahydroxanthones has been achieved through the addition of alkynes to benzopyrylium trilfates under the influence of copper bis(oxazoline) catalysis. Excellent levels of enantiocontrol (63-98 % ee) are achieved in the addition of a variety of alkynes to an array of chromenones with a hydrogen in the 2-position. Promising levels of enantiocontrol (54-67 % ee) are achieved in the alkynylation of chromenones with esters in the 2-position, generating tertiary ether stereocenters resembling those frequently found in naturally occurring metabolites.
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Affiliation(s)
- Yong Guan
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA, 01605, USA
| | - Jonathan W Attard
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA, 01605, USA
| | - Anita E Mattson
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA, 01605, USA
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27
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Ali R, Guan Y, Leveille AN, Vaughn E, Parelkar S, Thompson PR, Mattson AE. Synthesis and Anticancer Activity of Structure Simplified Naturally-Inspired Dimeric Chromenone Derivatives. European J Org Chem 2019; 2019:6917-6929. [PMID: 33828411 DOI: 10.1002/ejoc.201901026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Select dimeric chromenones exhibit low micromolar cyctotoxicity toward lymphoma and leukemia cell lines, L5178Y and HL60, respectively. The bioactive dimeric chromenones were identified from a focused library of structurally-simplified derivatives of naturally-occurring dimeric chromenones and tetrahydroxanthones that was prepared as part of this study. The simple dimeric chromenone scaffolds contain no stereogenic centers, are easily synthesized, and may be utilized as lead compounds in cancer research and drug discovery.
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Affiliation(s)
- Rameez Ali
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, 60 Prescott St., Worcester, MA 01602
| | - Yong Guan
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, 60 Prescott St., Worcester, MA 01602
| | - Alexandria N Leveille
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, 60 Prescott St., Worcester, MA 01602
| | - Elizabeth Vaughn
- Department of Chemistry, Appalachian State University, 287 Rivers St., Boone, NC 28608
| | - Sangram Parelkar
- Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, 364 Plantation St., Worcester, MA, 01605
| | - Paul R Thompson
- Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, 364 Plantation St., Worcester, MA, 01605
| | - Anita E Mattson
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, 60 Prescott St., Worcester, MA 01602
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28
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DeRatt LG, Pappoppula M, Aponick A. A Facile Enantioselective Alkynylation of Chromones. Angew Chem Int Ed Engl 2019; 58:8416-8420. [PMID: 31016846 DOI: 10.1002/anie.201902405] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Revised: 04/02/2019] [Indexed: 11/06/2022]
Abstract
The first catalytic enantioselective alkynylation of chromones is reported. In this process, chromones are silylated to form silyloxybenzopyrylium ions that lead to silyl enol ethers after Cu-catalyzed alkyne addition using StackPhos as a ligand. The outcome of the reaction is impacted by distal ligand substituents with differing electronic character and it was found that successful reactions could be achieved with different ligand congeners by using different solvents. This sequence enables access to different products by protonation or further functionalization, thus increasing complexity in a divergent manner. The transformation is high yielding over a broad scope to provide a variety of useful chromanones in high enantioselectivity.
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Affiliation(s)
- Lindsey G DeRatt
- Florida Center for Heterocyclic Compounds & Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, FL, 32607, USA
| | - Mukesh Pappoppula
- Florida Center for Heterocyclic Compounds & Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, FL, 32607, USA
| | - Aaron Aponick
- Florida Center for Heterocyclic Compounds & Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, FL, 32607, USA
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29
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Zuo X, Liu XL, Wang JX, Yao YM, Zhou YY, Wei QD, Gong Y, Zhou Y. Organocatalytic Reaction of Chromone-Oxindole Synthon: Access to Chromanone-Based Spirocyclohexaneoxindoles with Five Adjacent Stereocenters. J Org Chem 2019; 84:6679-6688. [DOI: 10.1021/acs.joc.9b00326] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Xiong Zuo
- College of Pharmaceutical Sciences, Guizhou University of Chinese Medicine, Guiyang 550025, China
- Guizhou Engineering Center for Innovative Traditional Chinese Medicine and Ethnic Medicine, Guizhou University, Guiyang 550025, China
| | - Xiong-Li Liu
- College of Pharmaceutical Sciences, Guizhou University of Chinese Medicine, Guiyang 550025, China
- Guizhou Engineering Center for Innovative Traditional Chinese Medicine and Ethnic Medicine, Guizhou University, Guiyang 550025, China
| | - Jun-Xin Wang
- Guizhou Engineering Center for Innovative Traditional Chinese Medicine and Ethnic Medicine, Guizhou University, Guiyang 550025, China
| | - Yi-Ming Yao
- Guizhou Engineering Center for Innovative Traditional Chinese Medicine and Ethnic Medicine, Guizhou University, Guiyang 550025, China
| | - Yan-You Zhou
- Guizhou Engineering Center for Innovative Traditional Chinese Medicine and Ethnic Medicine, Guizhou University, Guiyang 550025, China
| | - Qi-Di Wei
- Guizhou Engineering Center for Innovative Traditional Chinese Medicine and Ethnic Medicine, Guizhou University, Guiyang 550025, China
| | - Yi Gong
- Guizhou Engineering Center for Innovative Traditional Chinese Medicine and Ethnic Medicine, Guizhou University, Guiyang 550025, China
| | - Ying Zhou
- College of Pharmaceutical Sciences, Guizhou University of Chinese Medicine, Guiyang 550025, China
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30
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DeRatt LG, Pappoppula M, Aponick A. A Facile Enantioselective Alkynylation of Chromones. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201902405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Lindsey G. DeRatt
- Florida Center for Heterocyclic Compounds & Department of ChemistryUniversity of Florida P.O. Box 117200 Gainesville FL 32607 USA
| | - Mukesh Pappoppula
- Florida Center for Heterocyclic Compounds & Department of ChemistryUniversity of Florida P.O. Box 117200 Gainesville FL 32607 USA
| | - Aaron Aponick
- Florida Center for Heterocyclic Compounds & Department of ChemistryUniversity of Florida P.O. Box 117200 Gainesville FL 32607 USA
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31
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Boer SA, Foyle EM, Thomas CM, White NG. Anion coordination chemistry using O-H groups. Chem Soc Rev 2019; 48:2596-2614. [PMID: 30860210 DOI: 10.1039/c8cs00828k] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
This review covers significant advances in the use of O-H groups in anion coordination chemistry. The review focuses on the use of these groups in synthetic anion receptors, as well as more recent developments in transport, self-assembly and catalysis.
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Affiliation(s)
- Stephanie A Boer
- Research School of Chemistry, The Australian National University, Canberra, Australia.
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32
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Liu XL, Zhou G, Gong Y, Yao Z, Zuo X, Zhang WH, Zhou Y. Stereocontrolled Synthesis of Bispirooxindole-Based Hexahydroxanthones with Five Contiguous Stereocenters. Org Lett 2019; 21:2528-2531. [DOI: 10.1021/acs.orglett.9b00139] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Xiong-Li Liu
- College of Pharmaceutical Sciences, Guizhou University of Chinese Medicine, Guiyang, Guizhou 550025, P.R. China
- Guizhou Engineering Center for Innovative Traditional Chinese Medicine and Ethnic Medicine, Guizhou University, Guiyang, Guizhou 550025, P.R. China
| | - Gen Zhou
- Guizhou Engineering Center for Innovative Traditional Chinese Medicine and Ethnic Medicine, Guizhou University, Guiyang, Guizhou 550025, P.R. China
| | - Yi Gong
- Guizhou Engineering Center for Innovative Traditional Chinese Medicine and Ethnic Medicine, Guizhou University, Guiyang, Guizhou 550025, P.R. China
| | - Zhen Yao
- Guizhou Engineering Center for Innovative Traditional Chinese Medicine and Ethnic Medicine, Guizhou University, Guiyang, Guizhou 550025, P.R. China
| | - Xiong Zuo
- Guizhou Engineering Center for Innovative Traditional Chinese Medicine and Ethnic Medicine, Guizhou University, Guiyang, Guizhou 550025, P.R. China
| | - Wen-Hui Zhang
- Guizhou Engineering Center for Innovative Traditional Chinese Medicine and Ethnic Medicine, Guizhou University, Guiyang, Guizhou 550025, P.R. China
| | - Ying Zhou
- College of Pharmaceutical Sciences, Guizhou University of Chinese Medicine, Guiyang, Guizhou 550025, P.R. China
- Guizhou Engineering Center for Innovative Traditional Chinese Medicine and Ethnic Medicine, Guizhou University, Guiyang, Guizhou 550025, P.R. China
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33
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Fischer T, Bamberger J, Gómez-Martínez M, Piekarski DG, García Mancheño O. Helical Multi-Coordination Anion-Binding Catalysts for the Highly Enantioselective Dearomatization of Pyrylium Derivatives. Angew Chem Int Ed Engl 2019; 58:3217-3221. [PMID: 30427107 PMCID: PMC6470695 DOI: 10.1002/anie.201812031] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Revised: 11/09/2018] [Indexed: 01/26/2023]
Abstract
A general and highly enantioselective synthesis of oxygen heterocycles from readily available in situ generated pyrylium derivatives has been realized by embracing a multi-coordination approach with helical anion-binding tetrakistriazole catalysts. The high activity of the tetrakistriazole (TetraTri) catalysts, with distinct confined anion-binding pockets, allows for remarkably low catalyst loadings (down to 0.05 mol %), while providing a simple access to chiral chromanones and dihydropyrones in high enantioselectivities (up to 98:2 e.r.). Moreover, experimental and theoretical studies provide new insights into the hydrogen-donor ability and key binding interactions of the TetraTri catalysts and its host:guest complexes, suggesting the formation of a 1:3 species.
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Affiliation(s)
- Theresa Fischer
- Organic Chemistry Institute, University of Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Julia Bamberger
- Organic Chemistry Institute, University of Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Melania Gómez-Martínez
- Organic Chemistry Institute, University of Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Dariusz G Piekarski
- Organic Chemistry Institute, University of Münster, Corrensstraße 40, 48149, Münster, Germany
| | - Olga García Mancheño
- Organic Chemistry Institute, University of Münster, Corrensstraße 40, 48149, Münster, Germany
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34
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Fox F, Neudörfl JM, Goldfuss B. Silanediol versus chlorosilanol: hydrolyses and hydrogen-bonding catalyses with fenchole-based silanes. Beilstein J Org Chem 2019; 15:167-186. [PMID: 30745992 PMCID: PMC6350884 DOI: 10.3762/bjoc.15.17] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Accepted: 12/22/2018] [Indexed: 01/01/2023] Open
Abstract
Biphenyl-2,2’-bisfenchyloxydichlorosilane (7, BIFOXSiCl2) is synthesized and employed as precursor for the new silanols biphenyl-2,2’-bisfenchyloxychlorosilanol (8, BIFOXSiCl(OH)) and biphenyl-2,2’-bisfenchyloxysilanediol (9, BIFOXSi(OH)2). BIFOXSiCl2 (7) shows a remarkable stability against hydrolysis, yielding silanediol 9 under enforced conditions. A kinetic study for the hydrolysis of dichlorosilane 7 shows a 263 times slower reaction compared to reference bis-(2,4,6-tri-tert-butylphenoxy)dichlorosilane (14), known for its low hydrolytic reactivity. Computational analyses explain the slow hydrolyses of BIFOXSiCl2 (7) to BIFOXSiCl(OH) (8, Ea = 32.6 kcal mol−1) and BIFOXSiCl(OH) (8) to BIFOXSi(OH)2 (9, Ea = 31.4 kcal mol−1) with high activation barriers, enforced by endo fenchone units. Crystal structure analyses of silanediol 9 with acetone show shorter hydrogen bonds between the Si–OH groups and the oxygen of the bound acetone (OH···O 1.88(3)–2.05(2) Å) than with chlorosilanol 8 (OH···2.16(0) Å). Due to its two hydroxy units, the silanediol 9 shows higher catalytic activity as hydrogen bond donor than chlorosilanol 8, e.g., C–C coupling N-acyl Mannich reaction of silyl ketene acetals 11 with N-acylisoquinolinium ions (up to 85% yield and 12% ee), reaction of 1-chloroisochroman (18) and silyl ketene acetals 11 (up to 85% yield and 5% ee), reaction of chromen-4-one (20) and silyl ketene acetals 11 (up to 98% yield and 4% ee).
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Affiliation(s)
- Falco Fox
- Department für Chemie, Institut für Organische Chemie, Greinstrasse 4, 50939 Köln, Germany
| | - Jörg M Neudörfl
- Department für Chemie, Institut für Organische Chemie, Greinstrasse 6, 50939 Köln, Germany
| | - Bernd Goldfuss
- Department für Chemie, Institut für Organische Chemie, Greinstrasse 4, 50939 Köln, Germany
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35
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Sheng J, Liu J, Chen L, Zhang L, Zheng L, Wei X. Silver-catalyzed cascade radical cyclization of 2-(allyloxy)arylaldehydes with cyclopropanols: access to chroman-4-one derivatives. Org Chem Front 2019. [DOI: 10.1039/c9qo00292h] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A convenient silver-catalyzed cascade radical cyclization of 2-(allyloxy)arylaldehydes with cyclopropanols was developed to synthesize carbonyl-containing alkyl-substituted chroman-4-one derivatives.
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Affiliation(s)
- Jie Sheng
- School of Chemistry and Chemical Engineering
- Guangzhou University
- Guangzhou
- P. R. China
| | - Jidan Liu
- School of Chemistry and Chemical Engineering
- Guangzhou University
- Guangzhou
- P. R. China
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
| | - Liuqing Chen
- School of Chemistry and Chemical Engineering
- Guangzhou University
- Guangzhou
- P. R. China
| | - Lingling Zhang
- School of Chemistry and Chemical Engineering
- Guangzhou University
- Guangzhou
- P. R. China
| | - Liyao Zheng
- School of Chemistry and Chemical Engineering
- Guangzhou University
- Guangzhou
- P. R. China
| | - Xingchuan Wei
- School of Chemistry and Chemical Engineering
- Guangzhou University
- Guangzhou
- P. R. China
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36
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Yue J, Chen S, Zuo X, Liu XL, Xu SW, Zhou Y. Diversity-oriented one-pot multicomponent synthesis of chromanone-based 3,3′-pyrrolidinyl-spirooxindoles via a 1,3-dipolar cycloaddition reaction. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2018.11.075] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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37
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Helikale Multi‐Koordinations‐Anionenbindungskatalysatoren ermöglichen hoch enantioselektive Dearomatisierung von Pyryliumderivaten. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201812031] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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38
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Chiral Diol-Based Organocatalysts in Enantioselective Reactions. Molecules 2018; 23:molecules23092317. [PMID: 30208621 PMCID: PMC6225256 DOI: 10.3390/molecules23092317] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 09/03/2018] [Accepted: 09/06/2018] [Indexed: 12/22/2022] Open
Abstract
Organocatalysis has emerged as a powerful synthetic tool in organic chemistry in the last few decades. Among various classes of organocatalysis, chiral diol-based scaffolds, such as BINOLs, VANOLs, and tartaric acid derivatives, have been widely used to induce enantioselectivity due to the ability of the hydroxyls to coordinate with the Lewis acidic sites of reagents or substrates and create a chiral environment for the transformation. In this review, we will discuss the applications of these diol-based catalysts in different types of reactions, including the scopes of reactions and the modes of catalyst activation. In general, the axially chiral aryl diol BINOL and VANOL derivatives serve as the most competent catalyst for most examples, but examples of exclusive success using other scaffolds, herein, suggests that they should not be overlooked. Lastly, the examples, to date, are mainly from tartrate and biaryl diol catalysts, suggesting that innovation may be available from new diol scaffolds.
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Lee S, Bae HY, List B. Can a Ketone Be More Reactive than an Aldehyde? Catalytic Asymmetric Synthesis of Substituted Tetrahydrofurans. Angew Chem Int Ed Engl 2018; 57:12162-12166. [PMID: 30126072 DOI: 10.1002/anie.201806312] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Indexed: 11/06/2022]
Abstract
O-heterocycles bearing tetrasubstituted stereogenic centers are prepared via catalytic chemo- and enantioselective nucleophilic additions to ketoaldehydes, in which the ketone reacts preferentially over the aldehyde. Five- and six-membered rings with both aromatic and aliphatic substituents, as well as an alkynyl substituent, are obtained. Moreover, 2,2,5-trisubstituted and 2,2,5,5-tetrasubstituted tetrahydrofurans are synthesized with excellent stereoselectivities. Additionally, the synthetic utility of the described method is demonstrated with a three-step synthesis of the side chain of anhydroharringtonine.
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Affiliation(s)
- Sunggi Lee
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Han Yong Bae
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
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40
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Lee S, Bae HY, List B. Kann ein Keton reaktiver als ein Aldehyd sein? Katalytische asymmetrische Synthese von substituierten Tetrahydrofuranen. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806312] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sunggi Lee
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| | - Han Yong Bae
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung; Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
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41
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Chen Z, Han C, Fan C, Liu G, Pu S. Copper-Catalyzed Diversity-Oriented Synthesis (DOS) of 4-Amino-2 H-chromen-2-imines: Application of Kemp Elimination toward O-Heterocycles. ACS OMEGA 2018; 3:8160-8168. [PMID: 31458953 PMCID: PMC6644361 DOI: 10.1021/acsomega.8b01179] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 07/05/2018] [Indexed: 06/10/2023]
Abstract
We report herein a copper-catalyzed sequential multicomponent reaction of benzo[d]isoxazoles with terminal alkynes and sulfonyl azides, which produced divergent 4-amino-2H-chromen-2-imines with excellent chemical selectivity. The reaction tolerated a broad range of functional groups, and released only N2 as the sole byproduct. The sulfonyl imino group could be removed to give biologically active free 4-amino-2H-chromenone in good yield.
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Affiliation(s)
- Zhiyuan Chen
- Jiangxi
Key Laboratory of Organic Chemistry, Jiangxi
Science and Technology Normal University, 605 Fenglin Road, Nanchang, Jiangxi 330013, P. R. China
- Key
Laboratory of Functional Small Organic Molecules, Ministry of Education,
and College of Chemistry & Chemical Engineering, Jiangxi Normal University, 99 Ziyang Road, Nanchang, Jiangxi 330022, P. R. China
| | - Cuifen Han
- Key
Laboratory of Functional Small Organic Molecules, Ministry of Education,
and College of Chemistry & Chemical Engineering, Jiangxi Normal University, 99 Ziyang Road, Nanchang, Jiangxi 330022, P. R. China
| | - Congbin Fan
- Jiangxi
Key Laboratory of Organic Chemistry, Jiangxi
Science and Technology Normal University, 605 Fenglin Road, Nanchang, Jiangxi 330013, P. R. China
| | - Gang Liu
- Jiangxi
Key Laboratory of Organic Chemistry, Jiangxi
Science and Technology Normal University, 605 Fenglin Road, Nanchang, Jiangxi 330013, P. R. China
| | - Shouzhi Pu
- Jiangxi
Key Laboratory of Organic Chemistry, Jiangxi
Science and Technology Normal University, 605 Fenglin Road, Nanchang, Jiangxi 330013, P. R. China
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42
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Guan Y, Attard JW, Visco MD, Fisher TJ, Mattson AE. Enantioselective Catalyst Systems from Copper(II) Triflate and BINOL-Silanediol. Chemistry 2018; 24:7123-7127. [PMID: 29575279 DOI: 10.1002/chem.201801304] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Indexed: 12/24/2022]
Abstract
Silanediol and copper catalysis are merged, for the first time, to create an enhanced Lewis acid catalyst system for enantioselective heterocycle functionalization. The promise of this silanediol and copper catalyst combination is demonstrated in the enantioselective addition of indoles to alkylidene malonates to give rise to the desirable adducts in excellent yield and high enantiomeric excess. From these studies, 1,1'-bi-2-naphthol (BINOL)-based silanediols emerge as one-of-a-kind cocatalysts. Their potential role in the reaction pathway is also discussed.
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Affiliation(s)
- Yong Guan
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA, 01609, USA
| | - Jonathan W Attard
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA, 01609, USA
| | | | - Thomas J Fisher
- The Goodyear Tire and Rubber Company, 200 Innovation Way, Akron, OH, USA
| | - Anita E Mattson
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA, 01609, USA
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43
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Hirata G, Maeda H. Pyrrole-Based Anion-Responsive π-Electronic Molecules as Hydrogen-Bonding Catalysts. Org Lett 2018; 20:2853-2856. [DOI: 10.1021/acs.orglett.8b00855] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Goki Hirata
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu 525−8577, Japan
| | - Hiromitsu Maeda
- Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu 525−8577, Japan
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44
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Gheewala CD, Hirschi JS, Lee WH, Paley DW, Vetticatt MJ, Lambert TH. Asymmetric Induction via a Helically Chiral Anion: Enantioselective Pentacarboxycyclopentadiene Brønsted Acid-Catalyzed Inverse-Electron-Demand Diels-Alder Cycloaddition of Oxocarbenium Ions. J Am Chem Soc 2018; 140:3523-3527. [PMID: 29485273 PMCID: PMC5859540 DOI: 10.1021/jacs.8b00260] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
An enantioselective catalytic inverse-electron-demand Diels-Alder reaction of salicylaldehyde acetal-derived oxocarbenium ions and vinyl ethers to generate 2,4-dioxychromanes is described. Chiral pentacarboxycyclopentadiene (PCCP) acids are found to be effective for a variety of substrates. Computational and X-ray crystallographic analyses support the unique hypothesis that an anion with point-chirality-induced helical chirality dictates the absolute sense of stereochemistry in this reaction.
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Affiliation(s)
- Chirag D Gheewala
- Department of Chemistry , Columbia University , New York , New York 10027 , United States
| | - Jennifer S Hirschi
- Department of Chemistry , Binghamton University , Binghamton , New York 13902 , United States
| | - Wai-Hang Lee
- Department of Chemistry , Columbia University , New York , New York 10027 , United States
| | - Daniel W Paley
- Department of Chemistry , Columbia University , New York , New York 10027 , United States
| | - Mathew J Vetticatt
- Department of Chemistry , Binghamton University , Binghamton , New York 13902 , United States
| | - Tristan H Lambert
- Department of Chemistry , Columbia University , New York , New York 10027 , United States
- Department of Chemistry and Chemical Biology , Cornell University , Ithaca , New York 14853 , United States
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45
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Wolf FF, Neudörfl JM, Goldfuss B. Hydrogen-bonding cyclodiphosphazanes: superior effects of 3,5-(CF3)2-substitution in anion-recognition and counter-ion catalysis. NEW J CHEM 2018. [DOI: 10.1039/c7nj04660j] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Syntheses, X-ray characterization and employment of new cyclodiphosph(v)azane hydrogen-bonding catalysts in experimental and computational anion recognition and the N-acyl-Mannich reaction.
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Affiliation(s)
- Florian F. Wolf
- Institut für Organische Chemie
- Universität zu Köln
- 50939 Köln
- Germany
| | - Jörg-M. Neudörfl
- Institut für Organische Chemie
- Universität zu Köln
- 50939 Köln
- Germany
| | - Bernd Goldfuss
- Institut für Organische Chemie
- Universität zu Köln
- 50939 Köln
- Germany
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46
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Zhao Q, Xiang H, Xiao JA, Xia PJ, Wang JJ, Chen X, Yang H. Selectfluor-Triggered Tandem Cyclization of o-Hydroxyarylenaminones To Access Difluorinated 2-Amino-Substituted Chromanones. J Org Chem 2017; 82:9837-9843. [DOI: 10.1021/acs.joc.7b01339] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Qinglan Zhao
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China
| | - Haoyue Xiang
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China
| | - Jun-An Xiao
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China
| | - Peng-Ju Xia
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China
| | - Jun-Jie Wang
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China
| | - Xiaoqing Chen
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China
| | - Hua Yang
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China
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47
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Hu G, Gupta AK, Huang L, Zhao W, Yin X, Osminski WEG, Huang RH, Wulff WD, Izzo JA, Vetticatt MJ. Pyro-Borates, Spiro-Borates, and Boroxinates of BINOL—Assembly, Structures, and Reactivity. J Am Chem Soc 2017; 139:10267-10285. [DOI: 10.1021/jacs.7b02317] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Gang Hu
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Anil K. Gupta
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Li Huang
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Wenjun Zhao
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Xiaopeng Yin
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Wynter E. G. Osminski
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Rui H. Huang
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - William D. Wulff
- Department
of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
| | - Joseph A. Izzo
- Department
of Chemistry, Binghamton University, Binghamton, New York 13902, United States
| | - Mathew J. Vetticatt
- Department
of Chemistry, Binghamton University, Binghamton, New York 13902, United States
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48
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Visco MD, Attard J, Guan Y, Mattson AE. Anion-binding catalyst designs for enantioselective synthesis. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.05.045] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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49
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Neyyappadath RM, Cordes DB, Slawin AMZ, Smith AD. 6-exo-trig Michael addition-lactonizations for catalytic enantioselective chromenone synthesis. Chem Commun (Camb) 2017; 53:2555-2558. [PMID: 28133660 PMCID: PMC5358503 DOI: 10.1039/c6cc10178j] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Accepted: 01/18/2017] [Indexed: 11/30/2022]
Abstract
The catalytic enantioselective 6-exo-trig Michael addition-lactonization of enone-acid substrates to form cis-chromenones with high diastereo- and enantiocontrol was developed using the commercially available isothiourea tetramisole. An acidic workup proved necessary to minimize product epimerization and maximize product er, providing cis-chromenones in excellent yield, and with excellent diastereo- and enantioselectivity.
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Affiliation(s)
- Rifahath M Neyyappadath
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST, UK.
| | - David B Cordes
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST, UK.
| | - Alexandra M Z Slawin
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST, UK.
| | - Andrew D Smith
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST, UK.
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50
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Lee S, Kaib PSJ, List B. Asymmetric Catalysis via Cyclic, Aliphatic Oxocarbenium Ions. J Am Chem Soc 2017; 139:2156-2159. [PMID: 28169541 DOI: 10.1021/jacs.6b11993] [Citation(s) in RCA: 94] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A direct enantioselective synthesis of substituted oxygen heterocycles from lactol acetates and enolsilanes has been realized using a highly reactive and confined imidodiphosphorimidate (IDPi) catalyst. Various chiral oxygen heterocycles, including tetrahydrofurans, tetrahydropyrans, oxepanes, chromans, and dihydrobenzofurans, were obtained in excellent enantioselectivities by reacting the corresponding lactol acetates with diverse enol silanes. Mechanistic studies suggest the reaction to proceed via a nonstabilized, aliphatic, cyclic oxocarbenium ion intermediate paired with the confined chiral counteranion.
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Affiliation(s)
- Sunggi Lee
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Philip S J Kaib
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
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