1
|
Hans AC, Becker PM, Haußmann J, Suhr S, Wanner DM, Lederer V, Willig F, Frey W, Sarkar B, Kästner J, Peters R. A Practical and Robust Zwitterionic Cooperative Lewis Acid/Acetate/Benzimidazolium Catalyst for Direct 1,4-Additions. Angew Chem Int Ed Engl 2023; 62:e202217519. [PMID: 36651714 DOI: 10.1002/anie.202217519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 01/17/2023] [Accepted: 01/18/2023] [Indexed: 01/19/2023]
Abstract
A catalyst type is disclosed allowing for exceptional efficiency in direct 1,4-additions. The catalyst is a zwitterionic entity, in which acetate binds to CuII , which is formally negatively charged and serving as counterion for benzimidazolium. All 3 functionalities are involved in the catalytic activation. For maleimides productivity was increased by a factor >300 compared to literature (TONs up to 6700). High stereoselectivity and productivity was attained for a broad range of other Michael acceptors as well. The polyfunctional catalyst is accessible in only 4 steps from N-Ph-benzimidazole with an overall yield of 96 % and robust during catalysis. This allowed to reuse the same catalyst multiple times with nearly constant efficiency. Mechanistic studies, in particular by DFT, give a detailed picture how the catalyst operates. The benzimidazolium unit stabilizes the coordinated enolate nucleophile and prevents that acetate/acetic acid dissociate from the catalyst.
Collapse
Affiliation(s)
- Andreas C Hans
- Universität Stuttgart, Institut für Organische Chemie, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Patrick M Becker
- Universität Stuttgart, Institut für Theoretische Chemie, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Johanna Haußmann
- Universität Stuttgart, Institut für Organische Chemie, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Simon Suhr
- Universität Stuttgart, Institut für Anorganische Chemie, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Daniel M Wanner
- Universität Stuttgart, Institut für Organische Chemie, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Vera Lederer
- Universität Stuttgart, Institut für Organische Chemie, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Felix Willig
- Universität Stuttgart, Institut für Organische Chemie, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Wolfgang Frey
- Universität Stuttgart, Institut für Organische Chemie, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Biprajit Sarkar
- Universität Stuttgart, Institut für Anorganische Chemie, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Johannes Kästner
- Universität Stuttgart, Institut für Theoretische Chemie, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - René Peters
- Universität Stuttgart, Institut für Organische Chemie, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| |
Collapse
|
2
|
Ohmatsu K, Morita Y, Kiyokawa M, Hoshino K, Ooi T. Catalytic Asymmetric Strecker Reaction of Ketoimines with Potassium Cyanide. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100608] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Kohsuke Ohmatsu
- Institute of Transformative Bio-Molecules (WPI-ITbM) Department of Molecular and Macromolecular Chemistry Graduate School of Engineering Nagoya University Nagoya 464-8601 Japan
| | - Yusuke Morita
- Institute of Transformative Bio-Molecules (WPI-ITbM) Department of Molecular and Macromolecular Chemistry Graduate School of Engineering Nagoya University Nagoya 464-8601 Japan
| | - Mari Kiyokawa
- Institute of Transformative Bio-Molecules (WPI-ITbM) Department of Molecular and Macromolecular Chemistry Graduate School of Engineering Nagoya University Nagoya 464-8601 Japan
| | - Kimihiro Hoshino
- Institute of Transformative Bio-Molecules (WPI-ITbM) Department of Molecular and Macromolecular Chemistry Graduate School of Engineering Nagoya University Nagoya 464-8601 Japan
| | - Takashi Ooi
- Institute of Transformative Bio-Molecules (WPI-ITbM) Department of Molecular and Macromolecular Chemistry Graduate School of Engineering Nagoya University Nagoya 464-8601 Japan
| |
Collapse
|
3
|
Junge T, Titze M, Frey W, Peters R. Asymmetric Hydrocyanation of
N
‐Phosphinoyl Aldimines with Acetone Cyanohydrin by Cooperative Lewis Acid/Onium Salt/Brønsted Base Catalysis. ChemCatChem 2021. [DOI: 10.1002/cctc.202001921] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Thorsten Junge
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Marvin Titze
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Wolfgang Frey
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Germany
| | - René Peters
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Germany
| |
Collapse
|
4
|
Titze M, Heitkämper J, Junge T, Kästner J, Peters R. Highly Active Cooperative Lewis Acid-Ammonium Salt Catalyst for the Enantioselective Hydroboration of Ketones. Angew Chem Int Ed Engl 2021; 60:5544-5553. [PMID: 33210781 PMCID: PMC7986937 DOI: 10.1002/anie.202012796] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 11/16/2020] [Indexed: 11/25/2022]
Abstract
Enantiopure secondary alcohols are fundamental high-value synthetic building blocks. One of the most attractive ways to get access to this compound class is the catalytic hydroboration. We describe a new concept for this reaction type that allowed for exceptional catalytic turnover numbers (up to 15 400), which were increased by around 1.5-3 orders of magnitude compared to the most active catalysts previously reported. In our concept an aprotic ammonium halide moiety cooperates with an oxophilic Lewis acid within the same catalyst molecule. Control experiments reveal that both catalytic centers are essential for the observed activity. Kinetic, spectroscopic and computational studies show that the hydride transfer is rate limiting and proceeds via a concerted mechanism, in which hydride at Boron is continuously displaced by iodide, reminiscent to an SN 2 reaction. The catalyst, which is accessible in high yields in few steps, was found to be stable during catalysis, readily recyclable and could be reused 10 times still efficiently working.
Collapse
Affiliation(s)
- Marvin Titze
- Universität StuttgartInstitut für Organische ChemiePfaffenwaldring 5570569StuttgartGermany
| | - Juliane Heitkämper
- Universität StuttgartInstitut für Theoretische ChemiePfaffenwaldring 5570569StuttgartGermany
| | - Thorsten Junge
- Universität StuttgartInstitut für Organische ChemiePfaffenwaldring 5570569StuttgartGermany
| | - Johannes Kästner
- Universität StuttgartInstitut für Theoretische ChemiePfaffenwaldring 5570569StuttgartGermany
| | - René Peters
- Universität StuttgartInstitut für Organische ChemiePfaffenwaldring 5570569StuttgartGermany
| |
Collapse
|
5
|
Titze M, Heitkämper J, Junge T, Kästner J, Peters R. Highly Active Cooperative Lewis Acid—Ammonium Salt Catalyst for the Enantioselective Hydroboration of Ketones. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202012796] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Marvin Titze
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Juliane Heitkämper
- Universität Stuttgart Institut für Theoretische Chemie Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Thorsten Junge
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Johannes Kästner
- Universität Stuttgart Institut für Theoretische Chemie Pfaffenwaldring 55 70569 Stuttgart Germany
| | - René Peters
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Germany
| |
Collapse
|
6
|
Miskov‐Pajic V, Willig F, Wanner DM, Frey W, Peters R. Enantiodivergent [4+2] Cycloaddition of Dienolates by Polyfunctional Lewis Acid/Zwitterion Catalysis. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202009093] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Vukoslava Miskov‐Pajic
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Felix Willig
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Daniel M. Wanner
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Wolfgang Frey
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Germany
| | - René Peters
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Germany
| |
Collapse
|
7
|
Miskov‐Pajic V, Willig F, Wanner DM, Frey W, Peters R. Enantiodivergent [4+2] Cycloaddition of Dienolates by Polyfunctional Lewis Acid/Zwitterion Catalysis. Angew Chem Int Ed Engl 2020; 59:19873-19877. [PMID: 32697020 PMCID: PMC7693193 DOI: 10.1002/anie.202009093] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Indexed: 12/23/2022]
Abstract
Diels-Alder reactions have become established as one of the most effective ways to prepare stereochemically complex six-membered rings. Different catalysis concepts have been reported, including dienophile activation by Lewis acids or H-bond donors and diene activation by bases. Herein we report a new concept, in which an acidic prodiene is acidified by a Lewis acid to facilitate deprotonation by an imidazolium-aryloxide entity within a polyfunctional catalyst. A metal dienolate is thus formed, while an imidazolium-ArOH moiety probably forms hydrogen bonds with the dienophile. The catalyst type, readily prepared in few steps in high overall yield, was applied to 3-hydroxy-2-pyrone and 3-hydroxy-2-pyridone as well as cyclopentenone prodienes. Maleimide, maleic anhydride, and nitroolefin dienophiles were employed. Kinetic, spectroscopic, and control experiments support a cooperative mode of action. High enantioselectivity was observed even with unprecedented TONs of up to 3680.
Collapse
Affiliation(s)
- Vukoslava Miskov‐Pajic
- Universität StuttgartInstitut für Organische ChemiePfaffenwaldring 5570569StuttgartGermany
| | - Felix Willig
- Universität StuttgartInstitut für Organische ChemiePfaffenwaldring 5570569StuttgartGermany
| | - Daniel M. Wanner
- Universität StuttgartInstitut für Organische ChemiePfaffenwaldring 5570569StuttgartGermany
| | - Wolfgang Frey
- Universität StuttgartInstitut für Organische ChemiePfaffenwaldring 5570569StuttgartGermany
| | - René Peters
- Universität StuttgartInstitut für Organische ChemiePfaffenwaldring 5570569StuttgartGermany
| |
Collapse
|
8
|
Nishiyori R, Okuno K, Shirakawa S. Triethylamine Hydroiodide as a Bifunctional Catalyst for the Solvent-Free Synthesis of 2-Oxazolidinones. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000771] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Ryuichi Nishiyori
- Department of Environmental Science; Graduate School of Fisheries and Environmental Sciences; Nagasaki University; 1-14 Bunkyo-machi 852-8521 Nagasaki Japan
| | - Ken Okuno
- Department of Environmental Science; Graduate School of Fisheries and Environmental Sciences; Nagasaki University; 1-14 Bunkyo-machi 852-8521 Nagasaki Japan
| | - Seiji Shirakawa
- Department of Environmental Science; Graduate School of Fisheries and Environmental Sciences; Nagasaki University; 1-14 Bunkyo-machi 852-8521 Nagasaki Japan
| |
Collapse
|
9
|
Zeng X, Sun J, Liu C, Ji C, Peng Y. Catalytic Asymmetric Cyanation Reactions of Aldehydes and Ketones in Total Synthesis. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900015] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Xing‐Ping Zeng
- Key Laboratory of Small Functional Organic MoleculeMinistry of EducationJiangxi Normal University Nanchang Jiangxi 330022 People's Republic of China
| | - Jun‐Chao Sun
- Key Laboratory of Small Functional Organic MoleculeMinistry of EducationJiangxi Normal University Nanchang Jiangxi 330022 People's Republic of China
| | - Chao Liu
- Key Laboratory of Small Functional Organic MoleculeMinistry of EducationJiangxi Normal University Nanchang Jiangxi 330022 People's Republic of China
| | - Cong‐Bin Ji
- Jiangxi Provincial Research of Targeting Pharmaceutical Engineering TechnologyShangrao Normal University Shangrao Jiangxi 334001 People's Republic of China
| | - Yi‐Yuan Peng
- Key Laboratory of Small Functional Organic MoleculeMinistry of EducationJiangxi Normal University Nanchang Jiangxi 330022 People's Republic of China
| |
Collapse
|
10
|
Brodbeck D, Álvarez-Barcia S, Meisner J, Broghammer F, Klepp J, Garnier D, Frey W, Kästner J, Peters R. Asymmetric Carboxycyanation of Aldehydes by Cooperative AlF/Onium Salt Catalysts: from Cyanoformate to KCN as Cyanide Source. Chemistry 2019; 25:1515-1524. [PMID: 30359465 DOI: 10.1002/chem.201804388] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 10/10/2018] [Indexed: 01/01/2023]
Abstract
Asymmetric 1,2-additions of cyanide yield enantioenriched cyanohydrins as versatile chiral building blocks. Next to HCN, volatile organic cyanide sources are usually used. Among them, cyanoformates are more attractive on technical scale than TMSCN for cost reasons, but catalytic productivity is usually lower. Here, the development of a new strategy for cyanations is described, in which this activity disadvantage is overcome. A Lewis acidic Al center cooperates with an aprotic onium moiety within a remarkably robust bifunctional Al-F-salen complex. This allowed for unprecedented turnover numbers of up to 104 . DFT studies suggest an unexpected unique trimolecular pathway in which the ammonium bound cyanide attacks the aldehyde, which itself is activated by the carbonyl group of the cyanoformate binding to the Al center. In addition, a novel practical carboxycyanation method was developed that makes use of KCN as the sole cyanide source. The use of a pyrocarbonate as carboxylating reagent provided the best results.
Collapse
Affiliation(s)
- Daniel Brodbeck
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569, Stuttgart, Germany
| | - Sonia Álvarez-Barcia
- Institut für Theoretische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569, Stuttgart, Germany
| | - Jan Meisner
- Institut für Theoretische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569, Stuttgart, Germany
| | - Florian Broghammer
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569, Stuttgart, Germany
| | - Julian Klepp
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569, Stuttgart, Germany
| | - Delphine Garnier
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569, Stuttgart, Germany
| | - Wolfgang Frey
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569, Stuttgart, Germany
| | - Johannes Kästner
- Institut für Theoretische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569, Stuttgart, Germany
| | - René Peters
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569, Stuttgart, Germany
| |
Collapse
|
11
|
Latendorf K, Mechler M, Schamne I, Mack D, Frey W, Peters R. Titanium Salen Complexes with Appended Silver NHC Groups as Nucleophilic Carbene Reservoir for Cooperative Asymmetric Lewis Acid/NHC Catalysis. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700436] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Katja Latendorf
- Institut für Organische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Melanie Mechler
- Institut für Organische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Irina Schamne
- Institut für Organische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Daniel Mack
- Institut für Organische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Wolfgang Frey
- Institut für Organische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - René Peters
- Institut für Organische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
| |
Collapse
|