1
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Hu X, Zhu Z, Li Z, Adili A, Odagi M, Abboud KA, Seidel D. Catalytic Enantioselective [4+2] Cycloadditions of Salicylaldehyde Acetals with Enol Ethers. Angew Chem Int Ed Engl 2024; 63:e202315759. [PMID: 38055210 DOI: 10.1002/anie.202315759] [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: 10/18/2023] [Revised: 11/28/2023] [Accepted: 11/30/2023] [Indexed: 12/07/2023]
Abstract
A readily accessible conjugate-base-stabilized carboxylic acid (CBSCA) catalyst facilitates highly enantioselective [4+2] cycloaddition reactions of salicylaldehyde-derived acetals and cyclic enol ethers, resulting in the formation of polycyclic chromanes with oxygenation in the 2- and 4-positions. Stereochemically more complex products can be obtained from racemic enol ethers. Spirocyclic products are also accessible.
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Affiliation(s)
- Xiaojun Hu
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
| | - Zhengbo Zhu
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
| | - Zhongzheng Li
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
| | - Alafate Adili
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
| | - Minami Odagi
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
- 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
| | - Khalil A Abboud
- Center for X-ray Crystallography, Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
| | - Daniel Seidel
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611, USA
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2
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Jiang HJ, Zuo H, Zhu M, Sharanov I, Irran E, Klare HFT, Tshepelevitsh S, Lõkov M, Leito I, Oestreich M. Chiral Carborane Acids Decorated with Binol-Based Phosphonates: Synthesis, Characterization, and Application. J Org Chem 2024; 89:756-760. [PMID: 38109189 DOI: 10.1021/acs.joc.3c02162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2023]
Abstract
The syntheses of hexabrominated closo-carborates decorated with different chiral Binol-derived phosphonates and their conjugate acids are described. X-ray diffraction analysis reveals a polymeric structure for the sodium salt with the anionic units connected by [B-Br-Na-O═P]+ linkages. For the acid, coordination of the proton to the phosphonate's P═O oxygen atom is assumed. The pKa value was estimated by combining experiments and computations. Application of these Brønsted acids as chiral catalysts in an imino-ene and a Mukaiyama-Mannich reaction was moderately successful.
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Affiliation(s)
- Hua-Jie Jiang
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623 Berlin, Germany
| | - Honghua Zuo
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623 Berlin, Germany
| | - Min Zhu
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623 Berlin, Germany
| | - Illia Sharanov
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623 Berlin, Germany
| | - Elisabeth Irran
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623 Berlin, Germany
| | - Hendrik F T Klare
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623 Berlin, Germany
| | - Sofja Tshepelevitsh
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia
| | - Märt Lõkov
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia
| | - Ivo Leito
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia
| | - Martin Oestreich
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623 Berlin, Germany
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3
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Diaba F, Trenchs G. Catalyst-free photo-induced aerobic radical synthesis of lactams from N-alkenyl trichloroacetamides in 2-methyltetrahydrofuran as the radical initiator under violet light. Org Biomol Chem 2024; 22:388-394. [PMID: 38086711 DOI: 10.1039/d3ob01804k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
The first violet light-mediated synthesis of γ- and δ-lactams from N-alkenyl trichloroacetamides is reported in tetrahydrofuran or 2-methyltetrahydrofuran alone. These catalyst and additive-free reactions are achieved with non-anhydrous solvents and under an air atmosphere where the solvent serves as the radical initiator.
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Affiliation(s)
- Faïza Diaba
- Laboratori de Química Orgànica, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII 27-31, 08028-Barcelona, Spain.
| | - Gisela Trenchs
- Laboratori de Química Orgànica, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII 27-31, 08028-Barcelona, Spain.
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4
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Singh VK, Zhu C, De CK, Leutzsch M, Baldinelli L, Mitra R, Bistoni G, List B. Taming secondary benzylic cations in catalytic asymmetric S N1 reactions. Science 2023; 382:325-329. [PMID: 37856595 DOI: 10.1126/science.adj7007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 09/05/2023] [Indexed: 10/21/2023]
Abstract
Benzylic stereogenic centers are ubiquitous in natural products and pharmaceuticals. A potentially general, though challenging, approach toward their selective creation would be asymmetric unimolecular nucleophilic substitution (SN1) reactions that proceed through highly reactive benzylic cations. We now report a broadly applicable solution to this problem by identifying chiral counteranions that pair with secondary benzylic cations to engage in catalytic asymmetric C-C, C-O, and C-N bond-forming reactions with excellent enantioselectivity. The critical cationic intermediate can be accessed from different precursors via Lewis- or Brønsted acid catalysis. Key to our strategy is the use of only weakly basic, confined counteranions that are posited to prolong the lifetime of the carbocation, thereby avoiding nonproductive deprotonation pathways to the corresponding styrene.
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Affiliation(s)
- Vikas Kumar Singh
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Chendan Zhu
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Chandra Kanta De
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Markus Leutzsch
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
| | - Lorenzo Baldinelli
- Department of Chemistry, Biology and Biotechnology, University of Perugia, 06122 Perugia, Italy
| | - Raja Mitra
- School of Chemical and Materials Sciences, Indian Institute of Technology Goa, Farmagudi, Ponda, Goa-403401, India
| | - Giovanni Bistoni
- Department of Chemistry, Biology and Biotechnology, University of Perugia, 06122 Perugia, Italy
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany
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5
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Zong Y, Zou X, Song J, Chen GQ, Zhang X. Chemoselective and Divergent Synthesis of Chlorohydrins and Oxaheterocycles via Ir-Catalyzed Asymmetric Hydrogenation. Org Lett 2023; 25:6875-6880. [PMID: 37697226 DOI: 10.1021/acs.orglett.3c02565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/13/2023]
Abstract
Chlorohydrins and oxaheterocycles are synthetically valuable building blocks for diverse natural products and therapeutic substances. A highly efficient Ir/f-phamidol-catalyzed asymmetric hydrogenation of ω-chloroketones was successfully developed, and various chlorohydrins and oxaheterocycles were obtained divergently with excellent yields and enantioselectivities (up to >99% yield and >99% ee). Synthetic utilities of this divergent transformation were demonstrated by gram-scale synthesis of key intermediates of several enantiomerically enriched drugs via this catalytic methodology.
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Affiliation(s)
- Yan Zong
- Shenzhen Key Laboratory of Small Molecule Drug Discovery and Synthesis, Department of Chemistry, and Medi-Pingshan, Southern University of Science and Technology, Shenzhen 518000, People's Republic of China
| | - Xiaomei Zou
- Shenzhen Key Laboratory of Small Molecule Drug Discovery and Synthesis, Department of Chemistry, and Medi-Pingshan, Southern University of Science and Technology, Shenzhen 518000, People's Republic of China
| | - Jingyuan Song
- Shenzhen Key Laboratory of Small Molecule Drug Discovery and Synthesis, Department of Chemistry, and Medi-Pingshan, Southern University of Science and Technology, Shenzhen 518000, People's Republic of China
| | - Gen-Qiang Chen
- Shenzhen Key Laboratory of Small Molecule Drug Discovery and Synthesis, Department of Chemistry, and Medi-Pingshan, Southern University of Science and Technology, Shenzhen 518000, People's Republic of China
- Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen 518000, People's Republic of China
| | - Xumu Zhang
- Shenzhen Key Laboratory of Small Molecule Drug Discovery and Synthesis, Department of Chemistry, and Medi-Pingshan, Southern University of Science and Technology, Shenzhen 518000, People's Republic of China
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6
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Zhou H, Properzi R, Leutzsch M, Belanzoni P, Bistoni G, Tsuji N, Han JT, Zhu C, List B. Organocatalytic DYKAT of Si-Stereogenic Silanes. J Am Chem Soc 2023; 145:4994-5000. [PMID: 36826435 PMCID: PMC9999423 DOI: 10.1021/jacs.3c00858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Chiral organosilanes do not exist in nature and are therefore absent from the "chiral pool". As a consequence, synthetic approaches toward enantiopure silanes, stereogenic at silicon, are rather limited. While catalytic asymmetric desymmetrization reactions of symmetric organosilicon compounds have been developed, the utilization of racemic silanes in a dynamic kinetic asymmetric transformation (DYKAT) or dynamic kinetic resolution (DKR) would significantly expand the breadth of accessible Si-stereogenic compounds. We now report a DYKAT of racemic allyl silanes enabled by strong and confined imidodiphosphorimidate (IDPi) catalysts, providing access to Si-stereogenic silyl ethers. The products of this reaction are easily converted into useful enantiopure monohydrosilanes. We propose a spectroscopically and experimentally supported mechanism involving the epimerization of a catalyst-bound intermediate.
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Affiliation(s)
- Hui Zhou
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Roberta Properzi
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Markus Leutzsch
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Paola Belanzoni
- University of Perugia, Department of Chemistry, Biology and Biotechnology, 06122 Perugia, Italy
| | - Giovanni Bistoni
- University of Perugia, Department of Chemistry, Biology and Biotechnology, 06122 Perugia, Italy
| | - Nobuya Tsuji
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo 001-0021, Japan
| | - Jung Tae Han
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Chendan Zhu
- 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.,Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo 001-0021, Japan
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7
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Sorensen CC, Kozuszek CT, Borden MA, Leibfarth FA. Asymmetric Ion-Pairing in Stereoselective Vinyl Polymerization. ACS Catal 2023. [DOI: 10.1021/acscatal.3c00040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Affiliation(s)
- Cole C. Sorensen
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599, United States
| | - Caleb T. Kozuszek
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599, United States
| | - Meredith A. Borden
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599, United States
| | - Frank A. Leibfarth
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599, United States
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8
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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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9
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Das S, Zhu C, Demirbas D, Bill E, De CK, List B. Asymmetric counteranion-directed photoredox catalysis. Science 2023; 379:494-499. [PMID: 36656920 DOI: 10.1126/science.ade8190] [Citation(s) in RCA: 19] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Photoredox catalysis enables distinctive and broadly applicable chemical reactions, but controlling their selectivity has proven to be difficult. The pursuit of enantioselectivity is a particularly daunting challenge, arguably because of the high energy of the activated radical (ion) intermediates, and previous approaches have invariably required pairing of the photoredox catalytic cycle with an additional activation mode for asymmetric induction. A potential solution for photoredox reactions proceeding via radical ions would be catalytic pairing with enantiopure counterions. However, although attempts toward this approach have been described, high selectivity has not yet been accomplished. Here we report a potentially general solution to radical cation-based asymmetric photoredox catalysis. We describe organic salts, featuring confined imidodiphosphorimidate counteranions that catalyze highly enantioselective [2+2]-cross cycloadditions of styrenes.
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Affiliation(s)
- Sayantani Das
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim an der Ruhr, Germany
| | - Chendan Zhu
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim an der Ruhr, Germany
| | - Derya Demirbas
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim an der Ruhr, Germany
| | - Eckhard Bill
- Max-Planck-Institut für Chemische Energiekonversion, D-45470 Mülheim an der Ruhr, Germany
| | - Chandra Kanta De
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim an der Ruhr, Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim an der Ruhr, Germany
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10
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Kang X, Stephens ER, Spector-Watts BM, Li Z, Liu Y, Liu L, Cui Y. Challenges and opportunities for chiral covalent organic frameworks. Chem Sci 2022; 13:9811-9832. [PMID: 36199638 PMCID: PMC9431510 DOI: 10.1039/d2sc02436e] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Accepted: 07/04/2022] [Indexed: 11/21/2022] Open
Abstract
As highly versatile crystalline porous materials, covalent organic frameworks (COFs) have emerged as an ideal platform for developing novel functional materials, attributed to their precise tunability of structure and functionality. Introducing chiral functional units into frameworks produces chiral COFs (CCOFs) with chiral superiorities through chirality conservation and conversion processes. This review summarises recent research progress in CCOFs, including synthetic methods, chiroptical characterisations, and their applications in asymmetric catalysis, chiral separation, and enantioselective recognition and sensing. Challenges and limitations are discussed to uncover future opportunities in CCOF research.
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Affiliation(s)
- Xing Kang
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University Shanghai 200240 China
| | - Emily R Stephens
- MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Chemical and Physical Sciences, Victoria University of Wellington Wellington 6012 New Zealand
| | - Benjamin M Spector-Watts
- MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Chemical and Physical Sciences, Victoria University of Wellington Wellington 6012 New Zealand
| | - Ziping Li
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University Shanghai 200240 China
| | - Yan Liu
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University Shanghai 200240 China
| | - Lujia Liu
- MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Chemical and Physical Sciences, Victoria University of Wellington Wellington 6012 New Zealand
- College of Biological, Chemical Sciences and Engineering, Jiaxing University Jiaxing Zhejiang 314001 China
| | - Yong Cui
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University Shanghai 200240 China
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11
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Liang XS, Li RD, Sun W, Liu Z, Wang XC. Coupling of 2 H-Chromenes with Silyl Ketene Acetals Enabled by Borane Catalysis. ACS Catal 2022. [DOI: 10.1021/acscatal.2c02774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xin-Shen Liang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Haihe Laboratory of Sustainable Chemical Transformations, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Rui-Dong Li
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Haihe Laboratory of Sustainable Chemical Transformations, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Wei Sun
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Haihe Laboratory of Sustainable Chemical Transformations, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Zhong Liu
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Haihe Laboratory of Sustainable Chemical Transformations, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Xiao-Chen Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Haihe Laboratory of Sustainable Chemical Transformations, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
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12
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Lee S, Chung W. Enantioselective halogenation via asymmetric
phase‐transfer
catalysis. B KOREAN CHEM SOC 2022. [DOI: 10.1002/bkcs.12546] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Sunggi Lee
- Department of Physics and Chemistry DGIST Daegu Republic of Korea
| | - Won‐jin Chung
- Department of Chemistry GIST Gwangju Republic of Korea
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13
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Zhou H, Han JT, Nöthling N, Lindner MM, Jenniches J, Kühn C, Tsuji N, Zhang L, List B. Organocatalytic Asymmetric Synthesis of Si-Stereogenic Silyl Ethers. J Am Chem Soc 2022; 144:10156-10161. [PMID: 35649270 PMCID: PMC9490845 DOI: 10.1021/jacs.2c04261] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
![]()
Functionalized enantiopure
organosilanes are important building
blocks with applications in various fields of chemistry; nevertheless,
asymmetric synthetic methods for their preparation are rare. Here
we report the first organocatalytic enantioselective synthesis of
tertiary silyl ethers possessing “central chirality”
on silicon. The reaction proceeds via a desymmetrizing carbon–carbon
bond forming silicon–hydrogen exchange reaction of symmetrical
bis(methallyl)silanes with phenols using newly developed imidodiphosphorimidate
(IDPi) catalysts. A variety of enantiopure silyl ethers was obtained
in high yields with good chemo- and enantioselectivities and could
be readily derivatized to several useful chiral silicon compounds,
leveraging the olefin functionality and the leaving group nature of
the phenoxy substituent.
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Affiliation(s)
- Hui Zhou
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Jung Tae Han
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Nils Nöthling
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Monika M Lindner
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Judith Jenniches
- Innovation Center, Merck KGaA, Frankfurter Straße 250, 64293 Darmstadt, Germany
| | - Clemens Kühn
- Innovation Center, Merck KGaA, Frankfurter Straße 250, 64293 Darmstadt, Germany
| | - Nobuya Tsuji
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo 001-0021, Japan
| | - Li Zhang
- 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.,Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo 001-0021, Japan
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14
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Ouyang J, Maji R, Leutzsch M, Mitschke B, List B. Design of an Organocatalytic Asymmetric (4 + 3) Cycloaddition of 2-Indolylalcohols with Dienolsilanes. J Am Chem Soc 2022; 144:8460-8466. [PMID: 35523203 PMCID: PMC9121375 DOI: 10.1021/jacs.2c02216] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
![]()
Here we present the
design of a highly enantioselective, catalytic
(4 + 3) cycloaddition of gem-dialkyl 2-indolyl alcohols
and dienolsilanes, enabled by strong and confined IDPi Lewis acids.
The method furnishes novel bicyclo[3.2.2]cyclohepta[b]indoles with up to three stereogenic centers, one of which is quaternary.
A broad substrate scope is accompanied by versatile downstream chemical
modifications. Density functional theory-supported mechanistic studies
shed light on the importance of the in situ generated silylium species
in an overall concerted yet asynchronous cycloaddition.
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Affiliation(s)
- Jie Ouyang
- Max-Planck-Institut für Kohlenforschung, D45470 Mülheim an der Ruhr, Germany
| | - Rajat Maji
- Max-Planck-Institut für Kohlenforschung, D45470 Mülheim an der Ruhr, Germany
| | - Markus Leutzsch
- Max-Planck-Institut für Kohlenforschung, D45470 Mülheim an der Ruhr, Germany
| | - Benjamin Mitschke
- Max-Planck-Institut für Kohlenforschung, D45470 Mülheim an der Ruhr, Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung, D45470 Mülheim an der Ruhr, Germany.,Institute for Chemical Reaction Design and Discovery (WPI-ICRedd), Hokkaido University, Sapporo 001-0021, Japan
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15
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Peng B, Ma J, Guo J, Gong Y, Wang R, Zhang Y, Zeng J, Chen WW, Ding K, Zhao B. A Powerful Chiral Super Brønsted C-H Acid for Asymmetric Catalysis. J Am Chem Soc 2022; 144:2853-2860. [PMID: 35143204 DOI: 10.1021/jacs.1c12723] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A new type of chiral super Brønsted C-H acids, BINOL-derived phosphoryl bis((trifluoromethyl)sulfonyl) methanes (BPTMs), were developed. As compared to widely utilized BINOL-derived chiral phosphoric acids (BPAs) and N-triflyl phosphoramides (NTPAs), BPTMs displayed much higher Brønsted acidity, resulting in dramatically improved activity and excellent enantioselectivity as demonstrated in catalytic asymmetric Mukaiyama-Mannich reaction, allylic amination, three-component coupling of allyltrimethylsilane with 9-fluorenylmethyl carbamate and aldehydes, and protonation of silyl enol ether. These new strong Brønsted C-H acids have provided a platform for expanding the chemistry of asymmetric Brønsted acid catalysis.
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Affiliation(s)
- Bingfei Peng
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai 200234, China
| | - Jiguo Ma
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai 200234, China.,State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Jianhua Guo
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai 200234, China
| | - Yating Gong
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai 200234, China
| | - Ronghao Wang
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai 200234, China
| | - Yi Zhang
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai 200234, China.,State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Jinlong Zeng
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai 200234, China
| | - Wen-Wen Chen
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai 200234, China
| | - Kuiling Ding
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Baoguo Zhao
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Shanghai Frontiers Science Center of Biomimetic Catalysis, Shanghai Normal University, Shanghai 200234, China
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16
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Grossmann O, Maji R, Aukland MH, Lee S, List B. Katalytische asymmetrische Additionen von Enolsilanen an in situ erzeugte zyklische, aliphatische
N
‐Acyliminiumionen. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202115036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Oleg Grossmann
- Homogene Katalyse Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| | - Rajat Maji
- Homogene Katalyse Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| | - Miles H. Aukland
- Homogene Katalyse Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| | - Sunggi Lee
- Department of Emerging Materials Science Daegu Gyeongbuk Institute of Science and Technology (DGIST) 333, Techno Jungang-daero, Hyeonpung-myeon, Dalseong-gun Daegu (Republik Korea
| | - Benjamin List
- Homogene Katalyse Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr (Germany)
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD) Hokkaido University Sapporo 001-0021 Japan
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17
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Liu B, Chen P. Synthesis and Properties of Novel Circularly Polarized Luminescence Materials Based on Binaphthol Skeleton. ACTA CHIMICA SINICA 2022. [DOI: 10.6023/a22030122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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18
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Zhang X, Yang Z, Jiang Y, Liao S. Organocatalytic, Stereoselective, Cationic Reversible Addition-Fragmentation Chain-Transfer Polymerization of Vinyl Ethers. J Am Chem Soc 2021; 144:679-684. [PMID: 34967605 DOI: 10.1021/jacs.1c11501] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Tacticity is a crucial factor affecting the properties of synthetic polymer materials. Here, we introduce a type of chiral organic Brønsted acid catalyst, 1,1'-bi-2-naphthol-derived N,N'-bis(triflyl)phosphoramidimidates (PADIs), for the cationic polymerization of vinyl ethers, which enables the development of the first organocatalytic, highly stereoselective, cationic reversible addition-fragmentation chain-transfer (RAFT) polymerization of vinyl ethers with a trithiocarbonate chain-transfer agent. This metal-free RAFT process could afford isotactic poly(vinyl ethers) with high stereoselectivity, controllable molecular mass, and narrow dispersity at low catalyst loadings (as low as 200 ppm). Moreover, the trithiocarbonate chain-end allows for chain extension to synthesize diblock copolymers comprising an isotactic poly(vinyl ether) block, by a mechanistic switching from stereoselective cationic RAFT polymerization to visible-light-regulated cationic and radical RAFT polymerization.
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Affiliation(s)
- Xun Zhang
- Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University), State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350108, China
| | - Zan Yang
- Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University), State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350108, China
| | - Yu Jiang
- Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University), State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350108, China
| | - Saihu Liao
- Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University), State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350108, China.,Beijing National Laboratory for Molecular Sciences, Beijing 100190, China
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19
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List B, Grossmann O, Maji R, Aukland MH, Lee S. Catalytic Asymmetric Additions of Enol Silanes to in situ Generated Cyclic, Aliphatic N-Acyliminium Ions. Angew Chem Int Ed Engl 2021; 61:e202115036. [PMID: 34897932 PMCID: PMC9303265 DOI: 10.1002/anie.202115036] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Indexed: 12/02/2022]
Abstract
Strong and confined imidodiphosphorimidate (IDPi) catalysts enable highly enantioselective substitutions of cyclic, aliphatic hemiaminal ethers with enol silanes. 2‐Substituted pyrrolidines, piperidines, and azepanes are obtained with high enantioselectivities, and the method displays a broad tolerance of various enol silane nucleophiles. Several natural products can be accessed using this methodology. Mechanistic studies support the intermediacy of non‐stabilized, cyclic N‐(exo‐acyl)iminium ions, paired with the confined chiral counteranion. Computational studies suggest transition states that explain the observed enantioselectivity.
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Affiliation(s)
- Benjamin List
- Max-Planck-Institut für Kohlenforschung, Homogenous Catalysis, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, GERMANY
| | - Oleg Grossmann
- Max-Planck-Institute für Kohlenforschung: Max-Planck-Institut fur Kohlenforschung, Homogenous Catalysis, GERMANY
| | - Rajat Maji
- Max-Planck-Institut für Kohlenforschung: Max-Planck-Institut fur Kohlenforschung, Homogeneous Catalysis, GERMANY
| | - Miles H Aukland
- Max-Planck-Institut für Kohlenforschung: Max-Planck-Institut fur Kohlenforschung, Homogeneou Catalysis, GERMANY
| | - Sunggi Lee
- DGIST: Daegu Gyeongbuk Institute of Science and Technology, Department of Emerging Materials Science, KOREA, REPUBLIC OF
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20
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Yang Z, Zhang X, Jiang Y, Ma Q, Liao S. Organocatalytic stereoselective cationic polymerization of vinyl ethers by employing a confined brønsted acid as the catalyst. Sci China Chem 2021. [DOI: 10.1007/s11426-021-1143-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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21
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Wang S, Zhelavskyi O, Lee J, Argüelles AJ, Khomutnyk YY, Mensah E, Guo H, Hourani R, Zimmerman PM, Nagorny P. Studies of Catalyst-Controlled Regioselective Acetalization and Its Application to Single-Pot Synthesis of Differentially Protected Saccharides. J Am Chem Soc 2021; 143:18592-18604. [PMID: 34705439 PMCID: PMC8585716 DOI: 10.1021/jacs.1c08448] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
This article describes studies on the regioselective acetal protection of monosaccharide-based diols using chiral phosphoric acids (CPAs) and their immobilized polymeric variants, (R)-Ad-TRIP-PS and (S)-SPINOL-PS, as the catalysts. These catalyst-controlled regioselective acetalizations were found to proceed with high regioselectivities (up to >25:1 rr) on various d-glucose-, d-galactose-, d-mannose-, and l-fucose-derived 1,2-diols and could be carried out in a regiodivergent fashion depending on the choice of chiral catalyst. The polymeric catalysts were conveniently recycled and reused multiple times for gram-scale functionalizations with catalytic loadings as low as 0.1 mol %, and their performance was often found to be superior to the performance of their monomeric variants. These regioselective CPA-catalyzed acetalizations were successfully combined with common hydroxyl group functionalizations as single-pot telescoped procedures to produce 32 regioisomerically pure differentially protected mono- and disaccharide derivatives. To further demonstrate the utility of the polymeric catalysts, the same batch of (R)-Ad-TRIP-PS catalyst was recycled and reused to accomplish single-pot gram-scale syntheses of 6 differentially protected d-glucose derivatives. The subsequent exploration of the reaction mechanism using NMR studies of deuterated and nondeuterated substrates revealed that low-temperature acetalizations happen via a syn-addition mechanism and that the reaction regioselectivity exhibits strong dependence on the temperature. The computational studies indicate a complex temperature-dependent interplay of two reaction mechanisms, one involving an anomeric phosphate intermediate and another via concerted asynchronous formation of an acetal, that results in syn-addition products. The computational models also explain the steric factors responsible for the observed C2 selectivities and are consistent with experimentally observed selectivity trends.
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Affiliation(s)
- Sibin Wang
- Chemistry Department, University of Michigan, 930 N. University Avenue, Ann Arbor, MI 48109
| | - Oleksii Zhelavskyi
- Chemistry Department, University of Michigan, 930 N. University Avenue, Ann Arbor, MI 48109
| | - Jeonghyo Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
| | - Alonso J. Argüelles
- Synthetic Molecule Design and Development, Lilly Research Laboratories, Eli Lilly and Company, 307 E. Merrill St. Indianapolis, IN 46225
| | | | - Enoch Mensah
- Chemistry Department, Indiana University Southeast, 4201 Grant Line Rd. New Albany, IN 47150
| | - Hao Guo
- Deparment of Chemical and Biomolecular Engineering, Lehigh University, Bethlehem, PA 18015
| | - Rami Hourani
- Chemistry Department, Stanford University, 333 Campus Drive, Stanford, CA 94305-5080
| | - Paul M. Zimmerman
- Chemistry Department, University of Michigan, 930 N. University Avenue, Ann Arbor, MI 48109
| | - Pavel Nagorny
- Chemistry Department, University of Michigan, 930 N. University Avenue, Ann Arbor, MI 48109
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22
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Chan YC, Sak MH, Frank SA, Miller SJ. Tunable and Cooperative Catalysis for Enantioselective Pictet-Spengler Reaction with Varied Nitrogen-Containing Heterocyclic Carboxaldehydes. Angew Chem Int Ed Engl 2021; 60:24573-24581. [PMID: 34487418 PMCID: PMC8556314 DOI: 10.1002/anie.202109694] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 08/24/2021] [Indexed: 01/16/2023]
Abstract
Herein we report an organocatalytic enantioselective functionalization of heterocyclic carboxaldehydes via the Pictet-Spengler reaction. Through careful pairing of novel squaramide and Brønsted acid catalysts, our method tolerates a breadth of heterocycles, enabling preparation of a series of heterocycle conjugated β-(tetrahydro)carbolines in good yield and enantioselectivity. Careful selection of carboxylic acid co-catalyst is essential for toleration of a variety of regioisomeric heterocycles. Utility is demonstrated via the three-step stereoselective preparation of pyridine-containing analogues of potent selective estrogen receptor downregulator and U.S. FDA approved drug Tadalafil.
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Affiliation(s)
- Yuk-Cheung Chan
- Department of Chemistry, Yale University, New Haven, CT, 06520, USA
| | - Marcus H Sak
- Department of Chemistry, Yale University, New Haven, CT, 06520, USA
| | - Scott A Frank
- Synthetic Molecule Design and Development, Eli Lilly and Company, Indianapolis, IN, 46285, USA
| | - Scott J Miller
- Department of Chemistry, Yale University, New Haven, CT, 06520, USA
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23
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Chan Y, Sak MH, Frank SA, Miller SJ. Tunable and Cooperative Catalysis for Enantioselective Pictet‐Spengler Reaction with Varied Nitrogen‐Containing Heterocyclic Carboxaldehydes. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202109694] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Yuk‐Cheung Chan
- Department of Chemistry Yale University New Haven CT 06520 USA
| | - Marcus H. Sak
- Department of Chemistry Yale University New Haven CT 06520 USA
| | - Scott A. Frank
- Synthetic Molecule Design and Development Eli Lilly and Company Indianapolis IN 46285 USA
| | - Scott J. Miller
- Department of Chemistry Yale University New Haven CT 06520 USA
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24
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Knutson PC, Teator AJ, Varner TP, Kozuszek CT, Jacky PE, Leibfarth FA. Brønsted Acid Catalyzed Stereoselective Polymerization of Vinyl Ethers. J Am Chem Soc 2021; 143:16388-16393. [PMID: 34597508 DOI: 10.1021/jacs.1c08282] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Isotactic poly(vinyl ether)s (PVEs) have recently been identified as a new class of semicrystalline thermoplastics with a valuable combination of mechanical and interfacial properties. Currently, methods to synthesize isotactic PVEs are limited to strong Lewis acids that require a high catalyst loading and limit the accessible scope of monomer substrates for polymerization. Here, we demonstrate the first Brønsted acid catalyzed stereoselective polymerization of vinyl ethers. A single-component imidodiphosphorimidate catalyst exhibits a sufficiently low pKa to initiate vinyl ether polymerization and acts as a chiral conjugate base to direct the stereochemistry of monomer addition to the oxocarbenium ion reactive chain end. This Brønsted acid catalyzed stereoselective polymerization enabled an expanded substrate scope compared to previous methods, the use of chain transfer agents to lower catalyst loading, and the capability to recycle the catalyst for multiple polymerizations.
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Affiliation(s)
- Phil C Knutson
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Aaron J Teator
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Travis P Varner
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Caleb T Kozuszek
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Paige E Jacky
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Frank A Leibfarth
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
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25
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Lei CW, Mu BS, Zhou F, Yu JS, Zhou Y, Zhou J. Organocatalytic enantioselective reactions involving prochiral carbocationic intermediates. Chem Commun (Camb) 2021; 57:9178-9191. [PMID: 34519317 DOI: 10.1039/d1cc03506a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Since the discovery of carbocations in 1901, the past 120 years have witnessed many marvelous advances in the chemistry of carbocations. The state-of-the-art research in this field is to overcome the intrinsic instability and high reactivity of the prochiral carbocationic intermediates to develop catalytic asymmetric reactions. Such transformations enable the facile synthesis of structurally diverse value-added products from readily available starting materials such as alkenes, alcohols, and carbonyl derivatives, and enjoy high and even perfect atom-economy in most cases. Notably, such allows catalytic stereoconvergent synthesis from racemic substrates and can realize regioselectivity in olefin functionalization reactions complementary to radical processes. With the rapid developments in modern asymmetric organocatalysis, a variety of highly enantioselective protocols evolving prochiral carbocationic intermediates have been achieved by employing three strategies, namely chiral ion-pairing, chiral nucleophile, or chiral carbenium ion strategy. This feature article aims to summarize the exciting advances in this emerging area and briefly showcase the possible mechanisms. The advantages and limitations of each strategy are presented as well as their synthetic applications in the synthesis of natural products or bioactive compounds.
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Affiliation(s)
- Chuan-Wen Lei
- College of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, 550025, P. R. China.
| | - Bo-Shuai Mu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai, 200062, P. R. China.
| | - Feng Zhou
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai, 200062, P. R. China.
| | - Jin-Sheng Yu
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai, 200062, P. R. China. .,Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Hainan Normal University, Haikou 571158, P. R. China
| | - Ying Zhou
- College of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, 550025, P. R. China.
| | - Jian Zhou
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, Shanghai, 200062, P. R. China. .,Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Hainan Normal University, Haikou 571158, P. R. China
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26
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Abstract
Abstract
During the last 20 years, organocatalysis has significantly advanced as a field. Thanks to contributions from hundreds of groups and companies around the world, the area has risen from a few mechanistically ill-defined niche reactions, to one of the most vibrant and innovative fields in chemistry, providing several well-defined generic activation modes for selective catalysis. Organocatalysis is also on the rise in industrial settings, especially for the production of enantiomers, which are of use in fine chemistry, pharma, crop-protection, and fragrance chemistry. Here we will look at some of the specific elements of organocatalysis that we think are particularly attractive and contribute to this successful development.
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Affiliation(s)
- Miles H. Aukland
- Max-Planck-Institut für Kohlenforschung , Mulheim an der Ruhr , Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung , Mulheim an der Ruhr , Germany
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27
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Zhu C, Mandrelli F, Zhou H, Maji R, List B. Catalytic Asymmetric Synthesis of Unprotected β 2-Amino Acids. J Am Chem Soc 2021; 143:3312-3317. [PMID: 33645969 PMCID: PMC7953379 DOI: 10.1021/jacs.1c00249] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
![]()
We report here a
scalable, catalytic one-pot approach to enantiopure
and unmodified β2-amino acids. A newly developed
confined imidodiphosphorimidate (IDPi) catalyzes a broadly applicable
reaction of diverse bis-silyl ketene acetals with a silylated aminomethyl
ether, followed by hydrolytic workup, to give free β2-amino acids in high yields, purity, and enantioselectivity. Importantly,
both aromatic and aliphatic β2-amino acids can be
obtained using this method. Mechanistic studies are consistent with
the aminomethylation to proceed via silylium-based asymmetric counteranion-directed
catalysis (Si-ACDC) and a transition state to explain the enantioselectivity
is suggested on the basis of density functional theory calculation.
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Affiliation(s)
- Chendan Zhu
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Francesca Mandrelli
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Hui Zhou
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Rajat Maji
- 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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28
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Ye P, Liu X, Wang G, Liu L. Nickel(II)-catalyzed asymmetric alkylation of acyclic oxocarbenium ions with carboxylic acid derivatives. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2020.08.034] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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29
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Chatani N, Fujii S, Kido Y, Nakayama Y, Kajikawa Y, Tokuhisa H, Fukumoto Y, Murai S. Co 2(CO) 8-Catalyzed Reactions of Acetals or Lactones with Hydrosilanes and Carbon Monoxide. A New Access to the Preparation of 1,2-Diol Derivatives through Siloxymethylation. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20200240] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Naoto Chatani
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Satoru Fujii
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Yoichi Kido
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Yasuhide Nakayama
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Yasuteru Kajikawa
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Hideo Tokuhisa
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Yoshiya Fukumoto
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Shinji Murai
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
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30
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Crich D. En Route to the Transformation of Glycoscience: A Chemist's Perspective on Internal and External Crossroads in Glycochemistry. J Am Chem Soc 2021; 143:17-34. [PMID: 33350830 PMCID: PMC7856254 DOI: 10.1021/jacs.0c11106] [Citation(s) in RCA: 64] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Carbohydrate chemistry is an essential component of the glycosciences and is fundamental to their progress. This Perspective takes the position that carbohydrate chemistry, or glycochemistry, has reached three crossroads on the path to the transformation of the glycosciences, and illustrates them with examples from the author's and other laboratories. The first of these potential inflexion points concerns the mechanism of the glycosylation reaction and the role of protecting groups. It is argued that the experimental evidence supports bimolecular SN2-like mechanisms for typical glycosylation reactions over unimolecular ones involving stereoselective attack on naked glycosyl oxocarbenium ions. Similarly, it is argued that the experimental evidence does not support long-range stereodirecting participation of remote esters through bridged bicyclic dioxacarbenium ions in organic solution in the presence of typical counterions. Rational design and improvement of glycosylation reactions must take into account the roles of the counterion and of concentration. A second crossroads is that between mainstream organic chemistry and glycan synthesis. The case is made that the only real difference between glycan and organic synthesis is the formation of C-O rather than C-C bonds, with diastereocontrol, strategy, tactics, and elegance being of critical importance in both areas: mainstream organic chemists should feel comfortable taking this fork in the road, just as carbohydrate chemists should traveling in the opposite direction. A third crossroads is that between carbohydrate chemistry and medicinal chemistry, where there are equally many opportunities for traffic in either direction. The glycosciences have advanced enormously in the past decade or so, but creativity, input, and ingenuity of scientists from all fields is needed to address the many sophisticated challenges that remain, not the least of which is the development of a broader and more general array of stereospecific glycosylation reactions.
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Affiliation(s)
- David Crich
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, 250 West Green Street, Athens, Georgia 30602, United States
- Department of Chemistry, University of Georgia, 140 Cedar Street, Athens, Georgia 30602, United States
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
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31
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Teator AJ, Varner TP, Knutson PC, Sorensen CC, Leibfarth FA. 100th Anniversary of Macromolecular Science Viewpoint: The Past, Present, and Future of Stereocontrolled Vinyl Polymerization. ACS Macro Lett 2020; 9:1638-1654. [PMID: 35617075 DOI: 10.1021/acsmacrolett.0c00664] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The thermomechanical properties exhibited by synthetic macromolecules can be directly linked to their tacticity, or the relative stereochemistry of repeat units. The development of stereoselective coordination-insertion polymerization, for example, led to the discovery of isotactic polypropylene, now one of the most widely produced commodity plastics in the world. Widespread interest in controlling polymer tacticity has led to a variety of stereoselective polymerization methodologies; however, this area of polymer science has lagged behind when compared to the ability to control molecular weight, dispersity, and composition. Despite decades of advancements, many stereoregular vinyl polymers remain unknown, particularly those comprised of polar functionality or derived from renewable resources. This Viewpoint provides an overview of recent developments in stereocontrolled polymerization, with an emphasis on propagation mechanism, and highlights successes, limitations, and future challenges for continued innovation.
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Affiliation(s)
- Aaron J. Teator
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Travis P. Varner
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Phil C. Knutson
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Cole C. Sorensen
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Frank A. Leibfarth
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
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32
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Benda MC, France S. Chiral disulfonimides: a versatile template for asymmetric catalysis. Org Biomol Chem 2020; 18:7485-7513. [PMID: 32940322 DOI: 10.1039/d0ob01742f] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Since the emergence of pseudo-C2-symmetric chiral phosphoric acids (CPA), much work has been done to utilize these systems in stereoselective, organocatalytic processes. Despite the success in this field, reasonably basic substrates such as imines are often required to achieve appreciable activation. In order to access a wider variety of potential reaction partners, many related organocatalysts with enhanced Brønsted acidity have since been developed. Chiral disulfonimides (DSIs) have materialized as one such powerful class of organocatalysts and have been shown to expand the list of potential substrates to include aldehydes and ketones via Brønsted, Lewis, or bifunctional acid activation. This versatility renders DSIs amenable to an impressive scope of reaction types, typically with remarkable stereoselectivity induced by asymmetric counteranion-directed catalysis (ACDC). This review serves to provide a complete analysis of the successful applications, mechanistic insights, and unmet challenges exhibited to date in DSI-catalyzed and -assisted processes.
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Affiliation(s)
- Meghan C Benda
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.
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33
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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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34
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Kang Z, Shou J, Xing D, Hu W. Rh(II)/Ag(I)-Cocatalyzed Three-Component Reaction via S N1/S N1'-Type Trapping of Oxonium Ylide with the Nicholas Intermediate. J Org Chem 2020; 85:9850-9862. [PMID: 32618194 DOI: 10.1021/acs.joc.0c01162] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A Rh(II)/Ag(I)-cocatalyzed three-component reaction of propargylic alcohol-Co2(CO)6 complexes with diazo compounds and benzyl alcohols is described, which represents the first trapping process of oxonium ylides with carbocations via the SN1/SN1'-type pathway. This transformation provides an efficient approach for construction of dicobalt hexacarbonyl-complexed 3,3-disubstituted oxindoles. Further derivatization of the product, initiated by the deprivation of the dicobalt species, gives the 3,3-disubstituted oxindoles with the ene alkynyl group and the privileged spirooxindole-vinyldihydropyran structure.
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Affiliation(s)
- Zhenghui Kang
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Jiayi Shou
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Dong Xing
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Wenhao Hu
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China.,Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
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35
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Pan YL, Zheng HL, Wang J, Yang C, Li X, Cheng JP. Enantioselective Allylation of Oxocarbenium Ions Catalyzed by Bi(OAc)3/Chiral Phosphoric Acid. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02585] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Yu-Liang Pan
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Han-Liang Zheng
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Jie Wang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Chen Yang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Xin Li
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Jin-Pei Cheng
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
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36
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Hayashi H, Tachi H, Suyama K. Synthesis and Photo-degradation of Polyphthalaldehydes with Oxime Ether Terminals. J PHOTOPOLYM SCI TEC 2020. [DOI: 10.2494/photopolymer.33.269] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hirokazu Hayashi
- Research Division of Applied Material Chemistry, Izumi Center, Osaka Research Institute of Industrial Science and Technology (ORIST)
| | - Hideki Tachi
- Research Division of Polymer Functional Materials, Izumi Center, Osaka Research Institute of Industrial Science and Technology (ORIST)
| | - Kanji Suyama
- Faculty of Liberal Arts and Sciences, Osaka Prefecture University
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37
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Yang T, Sun Y, Wang H, Lin Z, Wen J, Zhang X. Iridium‐Catalyzed Enantioselective Hydrogenation of Oxocarbenium Ions: A Case of Ionic Hydrogenation. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201916677] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Tilong Yang
- Shenzhen Grubbs Institute and Department of chemistrySouthern University of Science and Technology 1088 Xueyuan Road Shenzhen 518055 China
- Department of ChemistryThe Hong Kong University of Science and Technology Clear Water Bay Kowloon, Hong Kong China
| | - Yongjie Sun
- Shenzhen Grubbs Institute and Department of chemistrySouthern University of Science and Technology 1088 Xueyuan Road Shenzhen 518055 China
| | - Heng Wang
- Shenzhen Grubbs Institute and Department of chemistrySouthern University of Science and Technology 1088 Xueyuan Road Shenzhen 518055 China
| | - Zhenyang Lin
- Department of ChemistryThe Hong Kong University of Science and Technology Clear Water Bay Kowloon, Hong Kong China
| | - Jialin Wen
- Shenzhen Grubbs Institute and Department of chemistrySouthern University of Science and Technology 1088 Xueyuan Road Shenzhen 518055 China
- Academy for Advanced Interdisciplinary StudiesSouthern University of Science and Technology Shenzhen 518055 China
| | - Xumu Zhang
- Shenzhen Grubbs Institute and Department of chemistrySouthern University of Science and Technology 1088 Xueyuan Road Shenzhen 518055 China
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38
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Yang T, Sun Y, Wang H, Lin Z, Wen J, Zhang X. Iridium‐Catalyzed Enantioselective Hydrogenation of Oxocarbenium Ions: A Case of Ionic Hydrogenation. Angew Chem Int Ed Engl 2020; 59:6108-6114. [DOI: 10.1002/anie.201916677] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Indexed: 01/10/2023]
Affiliation(s)
- Tilong Yang
- Shenzhen Grubbs Institute and Department of chemistrySouthern University of Science and Technology 1088 Xueyuan Road Shenzhen 518055 China
- Department of ChemistryThe Hong Kong University of Science and Technology Clear Water Bay Kowloon, Hong Kong China
| | - Yongjie Sun
- Shenzhen Grubbs Institute and Department of chemistrySouthern University of Science and Technology 1088 Xueyuan Road Shenzhen 518055 China
| | - Heng Wang
- Shenzhen Grubbs Institute and Department of chemistrySouthern University of Science and Technology 1088 Xueyuan Road Shenzhen 518055 China
| | - Zhenyang Lin
- Department of ChemistryThe Hong Kong University of Science and Technology Clear Water Bay Kowloon, Hong Kong China
| | - Jialin Wen
- Shenzhen Grubbs Institute and Department of chemistrySouthern University of Science and Technology 1088 Xueyuan Road Shenzhen 518055 China
- Academy for Advanced Interdisciplinary StudiesSouthern University of Science and Technology Shenzhen 518055 China
| | - Xumu Zhang
- Shenzhen Grubbs Institute and Department of chemistrySouthern University of Science and Technology 1088 Xueyuan Road Shenzhen 518055 China
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Diastereoselective Synthesis of 2,3,4-Trisubstituted Tetrahydrofurans via Thermally Reactive 1,5-Diene- tert-butyl Carbonates. Org Lett 2020; 22:842-847. [PMID: 31951142 DOI: 10.1021/acs.orglett.9b04306] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report that 3,3-dicyano-1,5-dienes bearing tert-butyl carbonates can be thermally converted to 2,3,4-trisubstituted tetrahydrofurans. The transformation relies on two thermally reactive functional groups, a 1,5-diene and a tert-butyl carbonate, that react cooperatively to yield the furan scaffolds by thermal Cope rearrangement, Boc deprotection, and oxy-Michael addition. Described herein is background related to the discovery, optimization, and scope of the key transformation and representative functional group interconversion chemistry for the tetrahydrofuran scaffolds.
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40
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Yepes D, Neese F, List B, Bistoni G. Unveiling the Delicate Balance of Steric and Dispersion Interactions in Organocatalysis Using High-Level Computational Methods. J Am Chem Soc 2020; 142:3613-3625. [PMID: 31984734 PMCID: PMC7307905 DOI: 10.1021/jacs.9b13725] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
![]()
High-level quantum electronic structure
calculations are used to
provide a deep insight into the mechanism and stereocontrolling factors
of two recently developed catalytic asymmetric Diels–Alder
(DA) reactions of cinnamate esters with cyclopentadiene. The reactions
employ two structurally and electronically very different in situ
silylated enantiopure Lewis acid organocatalysts: i.e., binaphthyl-allyl-tetrasulfone
(BALT) and imidodiphosphorimidate (IDPi). Each of these catalysts
activates only specific substrates in an enantioselective fashion.
Emphasis is placed on identifying and quantifying the key noncovalent
interactions responsible for the selectivity of these transformations,
with the final aim of aiding in the development of designing principles
for catalysts with a broader scope. Our results shed light into the
mechanism through which the catalyst architecture determines the selectivity
of these transformations via a delicate balance of dispersion and
steric interactions.
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Affiliation(s)
- Diana Yepes
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1 , D-45470 Mülheim an der Ruhr , Germany
| | - Frank Neese
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1 , D-45470 Mülheim an der Ruhr , Germany
| | - Benjamin List
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1 , D-45470 Mülheim an der Ruhr , Germany
| | - Giovanni Bistoni
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1 , D-45470 Mülheim an der Ruhr , Germany
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41
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Imidodiphosphorimidate (IDPi) as an efficient organocatalyst for controlled/living ring-opening polymerization of lactones. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2019.109449] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Liu X, Sun S, Wang G, Bai Z, Pang J, Liu L. Catalytic enantioselective alkylation of 2-alkoxy-tetrahydrofurans. Org Chem Front 2020. [DOI: 10.1039/d0qo00104j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A nickel(ii)-catalyzed asymmetric alkylation of non-resonance-stabilized oxocarbenium ions with carboxylic acid derivatives on a large scale has been disclosed.
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Affiliation(s)
- Xuan Liu
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan 250100
- P.R. China
| | - Shaofa Sun
- School of Nuclear Technology and Chemistry & Biology
- Hubei University of Science and Technology
- Xianning 437000
- P.R. China
| | - Gang Wang
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan 250100
- P.R. China
| | - Zhushuang Bai
- Shandong Medicinal Biotechnology Centre
- Key Laboratory for Rare & Uncommon Diseases of Shandong Province
- Key Lab for Biotech-Drugs of National Health Commission
- Institute of Materia Medica
- Shandong First Medical University & Shandong Academy of Medical Sciences
| | - Jingxiang Pang
- Shandong Medicinal Biotechnology Centre
- Key Laboratory for Rare & Uncommon Diseases of Shandong Province
- Key Lab for Biotech-Drugs of National Health Commission
- Institute of Materia Medica
- Shandong First Medical University & Shandong Academy of Medical Sciences
| | - Lei Liu
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan 250100
- P.R. China
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43
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Kang Z, Zhang D, Xu X, Hu W. Privilege-Structure-Oriented Three-Component Asymmetric Aminomethylation: Assembly of Chiral 3-Aminomethyl Indolones. Org Lett 2019; 21:9878-9883. [PMID: 31793792 DOI: 10.1021/acs.orglett.9b03787] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The asymmetric aminomethylation reaction of 3-diazooxindoles with electronic-rich arenes and N,O-acetals cooperatively catalyzed by achiral dirhodium complex and chiral phosphoric acid is reported. The reaction provides a novel method for the facile synthesis of chiral 3-aminomethyl oxindoles with an all-carbon quaternary center in good yields (82-98%) with high to excellent enantioselectivities (up to 97% ee). The transformation proceeds through a convergent addition of a reactive zwitterionic intermediate with a chiral methylene iminium generated in situ via asymmetric counteranion-directed catalysis (ACDC). This work represents the first asymmetric aminomethylation method of mixed 3,3'-bisindoles with structural diversity.
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Affiliation(s)
- Zhenghui Kang
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences , Sun Yat-sen University , Guangzhou 510006 , China
| | - Dan Zhang
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences , Sun Yat-sen University , Guangzhou 510006 , China
| | - Xinfang Xu
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences , Sun Yat-sen University , Guangzhou 510006 , China
| | - Wenhao Hu
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences , Sun Yat-sen University , Guangzhou 510006 , China
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44
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Zhu Z, Odagi M, Zhao C, Abboud KA, Kirm HU, Saame J, Lõkov M, Leito I, Seidel D. Highly Acidic Conjugate‐Base‐Stabilized Carboxylic Acids Catalyze Enantioselective oxa‐Pictet–Spengler Reactions with Ketals. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201912677] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Zhengbo Zhu
- Center for Heterocyclic Compounds Department of Chemistry University of Florida Gainesville FL 32611 USA
| | - Minami Odagi
- Center for Heterocyclic Compounds Department of Chemistry University of Florida Gainesville FL 32611 USA
- 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
| | - Chenfei Zhao
- Department of Chemistry and Chemical Biology, Rutgers The State University of New Jersey Piscataway NJ 08854 USA
| | - Khalil A. Abboud
- Center for X-ray Crystallography Department of Chemistry University of Florida Gainesville FL 32611 USA
| | | | - Jaan Saame
- Institute of Chemistry University of Tartu Tartu Estonia
| | - Märt Lõkov
- Institute of Chemistry University of Tartu Tartu Estonia
| | - Ivo Leito
- Institute of Chemistry University of Tartu Tartu Estonia
| | - Daniel Seidel
- Center for Heterocyclic Compounds Department of Chemistry University of Florida Gainesville FL 32611 USA
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Zhu Z, Odagi M, Zhao C, Abboud KA, Kirm HU, Saame J, Lõkov M, Leito I, Seidel D. Highly Acidic Conjugate‐Base‐Stabilized Carboxylic Acids Catalyze Enantioselective oxa‐Pictet–Spengler Reactions with Ketals. Angew Chem Int Ed Engl 2019; 59:2028-2032. [DOI: 10.1002/anie.201912677] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 11/07/2019] [Indexed: 12/12/2022]
Affiliation(s)
- Zhengbo Zhu
- Center for Heterocyclic Compounds Department of Chemistry University of Florida Gainesville FL 32611 USA
| | - Minami Odagi
- Center for Heterocyclic Compounds Department of Chemistry University of Florida Gainesville FL 32611 USA
- 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
| | - Chenfei Zhao
- Department of Chemistry and Chemical Biology, Rutgers The State University of New Jersey Piscataway NJ 08854 USA
| | - Khalil A. Abboud
- Center for X-ray Crystallography Department of Chemistry University of Florida Gainesville FL 32611 USA
| | | | - Jaan Saame
- Institute of Chemistry University of Tartu Tartu Estonia
| | - Märt Lõkov
- Institute of Chemistry University of Tartu Tartu Estonia
| | - Ivo Leito
- Institute of Chemistry University of Tartu Tartu Estonia
| | - Daniel Seidel
- Center for Heterocyclic Compounds Department of Chemistry University of Florida Gainesville FL 32611 USA
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46
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Chavan LN, Mainkar PS, Chandrasekhar S. Organocatalytic Asymmetric Synthesis of Tetrahydrofuran and 1,2-Dihydrobenzofuran Scaffolds. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901067] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Lahu N. Chavan
- Department of Organic Synthesis and Process Chemistry; CSIR-Indian Institute of Chemical Technology; 500007 Hyderabad India
- Academy of Scientific and Innovative Research (AcSIR); 201 002 Uttar Pradesh Ghaziabad India
| | - Prathama S. Mainkar
- Department of Organic Synthesis and Process Chemistry; CSIR-Indian Institute of Chemical Technology; 500007 Hyderabad India
- Academy of Scientific and Innovative Research (AcSIR); 201 002 Uttar Pradesh Ghaziabad India
| | - S. Chandrasekhar
- Department of Organic Synthesis and Process Chemistry; CSIR-Indian Institute of Chemical Technology; 500007 Hyderabad India
- Academy of Scientific and Innovative Research (AcSIR); 201 002 Uttar Pradesh Ghaziabad India
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47
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Affiliation(s)
- Lucas Schreyer
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Deutschland
| | - Roberta Properzi
- 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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48
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Abstract
High acidity and structural confinement are pivotal elements in asymmetric acid catalysis. The recently introduced imidodiphosphorimidate (IDPi) Brønsted acids have met with remarkable success in combining those features, acting as powerful Brønsted acid catalysts and "silylium" Lewis acid precatalysts in numerous thus far inaccessible transformations. Substrates as challenging to activate as simple olefins were readily transformed, ketones were employed as acceptors in aldolizations allowing sub-ppm level catalysis, whereas enolates of the smallest donor aldehyde, acetaldehyde, did not polymerize but selectively added a single time to a variety of acceptor aldehydes.
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Affiliation(s)
- Lucas Schreyer
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Roberta Properzi
- 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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49
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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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Thölke S, Zhu H, Jansen D, Octa‐Smolin F, Thiele M, Kaupmees K, Leito I, Grimme S, Niemeyer J. Cooperative Organocatalysis: A Systematic Investigation of Covalently Linked Organophosphoric Acids for the Stereoselective Transfer Hydrogenation of Quinolines. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900548] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Simon Thölke
- Institute of Organic Chemistry and Center for Nanointegration Duisburg‐Essen (CENIDE) University of Duisburg‐Essen Universitätsstraße 7 45117 Essen Germany
| | - Hui Zhu
- Mulliken Center for Theoretical Chemistry Rheinische Friedrich‐Wilhelms‐Universität Bonn Beringstraße 4 53115 Bonn Germany
| | - Dennis Jansen
- Institute of Organic Chemistry and Center for Nanointegration Duisburg‐Essen (CENIDE) University of Duisburg‐Essen Universitätsstraße 7 45117 Essen Germany
| | - Frescilia Octa‐Smolin
- Institute of Organic Chemistry and Center for Nanointegration Duisburg‐Essen (CENIDE) University of Duisburg‐Essen Universitätsstraße 7 45117 Essen Germany
| | - Maike Thiele
- Institute of Organic Chemistry and Center for Nanointegration Duisburg‐Essen (CENIDE) University of Duisburg‐Essen Universitätsstraße 7 45117 Essen Germany
| | - Karl Kaupmees
- Institute of Chemistry University of Tartu 14a Ravila str 50411 Tartu Estonia
| | - Ivo Leito
- Institute of Chemistry University of Tartu 14a Ravila str 50411 Tartu Estonia
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry Rheinische Friedrich‐Wilhelms‐Universität Bonn Beringstraße 4 53115 Bonn Germany
| | - Jochen Niemeyer
- Institute of Organic Chemistry and Center for Nanointegration Duisburg‐Essen (CENIDE) University of Duisburg‐Essen Universitätsstraße 7 45117 Essen Germany
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