1
|
Kayukova L, Vologzhanina A. A New 2-Aminospiropyrazolylammonium Cation with Possible Uses in the Topical Areas of Ionic Liquids. Molecules 2024; 29:2326. [PMID: 38792187 PMCID: PMC11124009 DOI: 10.3390/molecules29102326] [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: 03/25/2024] [Revised: 05/08/2024] [Accepted: 05/10/2024] [Indexed: 05/26/2024] Open
Abstract
Based on the fact that 2-aminospiropyrazolinium compounds and structurally related azoniaspiro compounds belong, in a broad sense, to the class of ionic liquids, we have reviewed them and studied their practical applications. To search for possible uses of a new 2-aminospiropyrazolinium compounds, it is necessary to undertake a comparison with the related class of azoniaspiro compounds based on available information. The structures of the well-studied class of azoniaspiro compounds and the related but little-studied class of 2-aminospiropyrazolinium have rigid frameworks, limited conformational freedom, and a salt nature. These properties give them the ability to organize the nearby molecular space and enable the structure-forming ability of azoniaspiro compounds in the synthesis of zeolites, as well as the ability to act as phase-transfer catalysts and have selective biological effects. Additionally, these characteristics enable their ability to act as electrolytes and serve as materials for anion exchange membranes in fuel cells and water electrolyzers. Thus, the well-studied properties of azoniaspiro compounds as phase-transfer catalysts, structure-directing agents, electrolytes, and materials for membranes in power sources would encourage the study of the similar properties of 2-aminospiropyrazolinium compounds, which we have studied in relation to in vitro antitubercular, antidiabetic, and antimicrobial activities.
Collapse
Affiliation(s)
- Lyudmila Kayukova
- Laboratory of Chemistry of Synthetic and Natural Drug Substances, JSC A.B. Bekturov Institute of Chemical Sciences, 106 Shokan Ualikhanov Str., 050010 Almaty, Kazakhstan
| | - Anna Vologzhanina
- X-ray Diffraction Laboratory, A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Str., B-334, 119334 Moscow, Russia;
| |
Collapse
|
2
|
Lee HJ, Maruoka K. Recent Asymmetric Phase-Transfer Catalysis with Chiral Binaphthyl-Modified and Related Phase-Transfer Catalysts over the Last 10 Years. CHEM REC 2023:e202200286. [PMID: 36850022 DOI: 10.1002/tcr.202200286] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 02/14/2023] [Indexed: 03/01/2023]
Abstract
In this personal account, we describe our recent advances in the three types of phase-transfer catalysis for various transformations including asymmetric induction: Firstly, asymmetric phase-transfer catalysis with Maruoka-type C2 -symmetric chiral biaryl-modified tetraalkylammonium salts and phosphonium salts; Secondly, asymmetric phase-transfer catalysis under base-free and neutral conditions; Thirdly, hydrogen-bonding catalysis using tetraalkylammonium and trialkylsulfonium salts. These three different strategies are illustrated by using various phase-transfer catalyzed transformations.
Collapse
Affiliation(s)
- Hyo-Jun Lee
- Department of Chemistry, Kunsan National University, Gunsan, 54150, Republic of Korea
| | - Keiji Maruoka
- Graduate School of Pharmaceutical Sciences, Kyoto University Sakyo, Kyoto, 606-8501, Japan.,School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, 510006, China
| |
Collapse
|
3
|
Tilby MJ, Dewez DF, Hall A, Martínez Lamenca C, Willis MC. Exploiting Configurational Lability in Aza‐Sulfur Compounds for the Organocatalytic Enantioselective Synthesis of Sulfonimidamides. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202109160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Michael J. Tilby
- Department of Chemistry University of Oxford Chemistry Research Laboratory Mansfield Road Oxford OX1 3TA UK
| | - Damien F. Dewez
- Department of Chemistry University of Oxford Chemistry Research Laboratory Mansfield Road Oxford OX1 3TA UK
| | | | | | - Michael C. Willis
- Department of Chemistry University of Oxford Chemistry Research Laboratory Mansfield Road Oxford OX1 3TA UK
| |
Collapse
|
4
|
Tilby MJ, Dewez DF, Hall A, Martínez Lamenca C, Willis MC. Exploiting Configurational Lability in Aza-Sulfur Compounds for the Organocatalytic Enantioselective Synthesis of Sulfonimidamides. Angew Chem Int Ed Engl 2021; 60:25680-25687. [PMID: 34558788 PMCID: PMC9298307 DOI: 10.1002/anie.202109160] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 09/20/2021] [Indexed: 11/19/2022]
Abstract
Methods for establishing the absolute configuration of sulfur‐stereogenic aza‐sulfur derivatives are scarce, often relying on cumbersome protocols and a limited pool of enantioenriched starting materials. We have addressed this by exploiting, for the first time, a feature of sulfonimidamides in which it is possible for tautomeric structures to also be enantiomeric. Such sulfonimidamides can readily generate prochiral ions, which we have exploited in an enantioselective alkylation process. Selectivity is achieved using a readily prepared bis‐quaternized phase‐transfer catalyst. The overall process establishes the capability of configurationally labile aza‐sulfur species to be used in asymmetric catalysis.
Collapse
Affiliation(s)
- Michael J Tilby
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, UK
| | - Damien F Dewez
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, UK
| | - Adrian Hall
- UCB Biopharma, 1420, Braine-l'Alleud, Belgium
| | | | - Michael C Willis
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA, UK
| |
Collapse
|
5
|
Sharma P, Gupta R, Bansal RK. Recent advances in organocatalytic asymmetric aza-Michael reactions of amines and amides. Beilstein J Org Chem 2021; 17:2585-2610. [PMID: 34760026 PMCID: PMC8551878 DOI: 10.3762/bjoc.17.173] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 09/27/2021] [Indexed: 11/23/2022] Open
Abstract
Nitrogen-containing scaffolds are ubiquitous in nature and constitute an important class of building blocks in organic synthesis. The asymmetric aza-Michael reaction (aza-MR) alone or in tandem with other organic reaction(s) is an important synthetic tool to form new C-N bond(s) leading to developing new libraries of diverse types of bioactive nitrogen compounds. The synthesis and application of a variety of organocatalysts for accomplishing highly useful organic syntheses without causing environmental pollution in compliance with 'Green Chemistry" has been a landmark development in the recent past. Application of many of these organocatalysts has been extended to asymmetric aza-MR during the last two decades. The present article overviews the literature published during the last 10 years concerning the asymmetric aza-MR of amines and amides catalysed by organocatalysts. Both types of the organocatalysts, i.e., those acting through non-covalent interactions and those working through covalent bond formation have been applied for the asymmetric aza-MR. Thus, the review includes the examples wherein cinchona alkaloids, squaramides, chiral amines, phase-transfer catalysts and chiral bifunctional thioureas have been used, which activate the substrates through hydrogen bond formation. Most of these reactions are accompanied by high yields and enantiomeric excesses. On the other hand, N-heterocyclic carbenes and chiral pyrrolidine derivatives acting through covalent bond formation such as the iminium ions with the substrates have also been included. Wherever possible, a comparison has been made between the efficacies of various organocatalysts in asymmetric aza-MR.
Collapse
Affiliation(s)
- Pratibha Sharma
- Department of Chemistry, The IIS (deemed to be University), Jaipur 302 020, India
| | - Raakhi Gupta
- Department of Chemistry, The IIS (deemed to be University), Jaipur 302 020, India
| | - Raj Kumar Bansal
- Department of Chemistry, The IIS (deemed to be University), Jaipur 302 020, India
| |
Collapse
|
6
|
Guerrero‐Corella A, Valle‐Amores MA, Fraile A, Alemán J. Enantioselective Organocatalyzed
aza
‐Michael Addition Reaction of 2‐Hydroxybenzophenone Imines to Nitroolefins under Batch and Flow Conditions. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100635] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
| | - Miguel A. Valle‐Amores
- Organic Chemistry Department, Módulo 1 Universidad Autónoma de Madrid 28049 Madrid Spain
| | - Alberto Fraile
- Organic Chemistry Department, Módulo 1 Universidad Autónoma de Madrid 28049 Madrid Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem) Universidad Autónoma de Madrid 28049 Madrid Spain
| | - José Alemán
- Organic Chemistry Department, Módulo 1 Universidad Autónoma de Madrid 28049 Madrid Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem) Universidad Autónoma de Madrid 28049 Madrid Spain
| |
Collapse
|
7
|
Okuno K, Nakamura T, Shirakawa S. Asymmetric Catalysis of Chiral Bifunctional Selenides and Selenonium Salts Bearing a Urea Group. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100001] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Ken Okuno
- Department of Environmental Science Graduate School of Fisheries and Environmental Sciences Nagasaki University 1-14 Bunkyo-machi Nagasaki 852-8521 Japan
| | - Takumi Nakamura
- Department of Environmental Science Graduate School of Fisheries and Environmental Sciences Nagasaki University 1-14 Bunkyo-machi Nagasaki 852-8521 Japan
| | - Seiji Shirakawa
- Department of Environmental Science Graduate School of Fisheries and Environmental Sciences Nagasaki University 1-14 Bunkyo-machi Nagasaki 852-8521 Japan
| |
Collapse
|
8
|
Lu H, Lv J, Zhou C, Kato T, Liu Y, Maruoka K. Practical Synthesis of High‐Performance Amino Tf‐Amide Organocatalysts for Asymmetric Aldol Reactions. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.201900730] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Hanbin Lu
- School of Chemical Engineering and Light IndustryGuangdong University of Technology Guangzhou 510006 China
| | - Jiamin Lv
- School of Chemical Engineering and Light IndustryGuangdong University of Technology Guangzhou 510006 China
| | - Canhua Zhou
- School of Chemical Engineering and Light IndustryGuangdong University of Technology Guangzhou 510006 China
| | - Terumasa Kato
- School of Chemical Engineering and Light IndustryGuangdong University of Technology Guangzhou 510006 China
| | - Yan Liu
- School of Chemical Engineering and Light IndustryGuangdong University of Technology Guangzhou 510006 China
| | - Keiji Maruoka
- School of Chemical Engineering and Light IndustryGuangdong University of Technology Guangzhou 510006 China
- Graduate School of Pharmaceutical SciencesKyoto University Sakyo, Kyoto 606-8501 Japan
| |
Collapse
|
9
|
Gao W, Chen M, Ding Q, Peng Y. Catalytic Asymmetric Synthesis of Isoindolinones. Chem Asian J 2019; 14:1306-1322. [DOI: 10.1002/asia.201900080] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 03/11/2019] [Indexed: 12/11/2022]
Affiliation(s)
- Wei Gao
- Key Laboratory of Functional Small Organic MoleculesMinistry of Education and College of Chemistry & Chemical EngineeringJiangxi Normal University Nanchang Jiangxi 330022 P. R. China
- Jiangxi Academy of Forestry Nanchang Jiangxi 330013 P. R. China
| | - Mu‐wang Chen
- Key Laboratory of Functional Small Organic MoleculesMinistry of Education and College of Chemistry & Chemical EngineeringJiangxi Normal University Nanchang Jiangxi 330022 P. R. China
| | - Qiuping Ding
- Key Laboratory of Functional Small Organic MoleculesMinistry of Education and College of Chemistry & Chemical EngineeringJiangxi Normal University Nanchang Jiangxi 330022 P. R. China
| | - Yiyuan Peng
- Key Laboratory of Functional Small Organic MoleculesMinistry of Education and College of Chemistry & Chemical EngineeringJiangxi Normal University Nanchang Jiangxi 330022 P. R. China
| |
Collapse
|
10
|
Golandaj A, Ahmad A, Ramjugernath D. Phosphonium Salts in Asymmetric Catalysis: A Journey in a Decade's Extensive Research Work. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700795] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Ajij Golandaj
- Thermodynamics Research Unit, School of Chemical Engineering; University of KwaZulu-Natal; Howard College Campus, Private Bag X54001 Durban 4041 Republic of South Africa
| | - Akil Ahmad
- Thermodynamics Research Unit, School of Chemical Engineering; University of KwaZulu-Natal; Howard College Campus, Private Bag X54001 Durban 4041 Republic of South Africa
| | - Deresh Ramjugernath
- Thermodynamics Research Unit, School of Chemical Engineering; University of KwaZulu-Natal; Howard College Campus, Private Bag X54001 Durban 4041 Republic of South Africa
| |
Collapse
|
11
|
Brenna E, Crotti M, Gatti FG, Monti D, Parmeggiani F, Santangelo S. Asymmetric Bioreduction of β-Acylaminonitroalkenes: Easy Access to Chiral Building Blocks with Two Vicinal Nitrogen-Containing Functional Groups. ChemCatChem 2017. [DOI: 10.1002/cctc.201700063] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Elisabetta Brenna
- Dipartimento di Chimica; Materiali ed Ingegneria Chimica “Giulio Natta”; Politecnico di Milano; Via Mancinelli 7, I- 20131 Milano Italy
- Istituto di Chimica del Riconoscimento Molecolare; C.N.R.; Via Mario Bianco 9, I- 20131 Milano Italy
| | - Michele Crotti
- Dipartimento di Chimica; Materiali ed Ingegneria Chimica “Giulio Natta”; Politecnico di Milano; Via Mancinelli 7, I- 20131 Milano Italy
| | - Francesco G. Gatti
- Dipartimento di Chimica; Materiali ed Ingegneria Chimica “Giulio Natta”; Politecnico di Milano; Via Mancinelli 7, I- 20131 Milano Italy
| | - Daniela Monti
- Istituto di Chimica del Riconoscimento Molecolare; C.N.R.; Via Mario Bianco 9, I- 20131 Milano Italy
| | - Fabio Parmeggiani
- Dipartimento di Chimica; Materiali ed Ingegneria Chimica “Giulio Natta”; Politecnico di Milano; Via Mancinelli 7, I- 20131 Milano Italy
| | - Sara Santangelo
- Dipartimento di Chimica; Materiali ed Ingegneria Chimica “Giulio Natta”; Politecnico di Milano; Via Mancinelli 7, I- 20131 Milano Italy
| |
Collapse
|
12
|
Liu S, Maruoka K, Shirakawa S. Chiral Tertiary Sulfonium Salts as Effective Catalysts for Asymmetric Base-Free Neutral Phase-Transfer Reactions. Angew Chem Int Ed Engl 2017; 56:4819-4823. [PMID: 28371093 DOI: 10.1002/anie.201612328] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Revised: 03/07/2017] [Indexed: 01/08/2023]
Abstract
Although chiral quaternary ammonium and phosphonium salts are commonly used for asymmetric organocatalysis, the catalytic ability of chiral tertiary sulfonium salts has yet to be demonstrated in asymmetric synthesis. Herein, we show that chiral bifunctional trialkylsulfonium salts catalyze highly enantioselective conjugate additions of 3-substituted oxindoles to maleimides under base-free neutral phase-transfer conditions.
Collapse
Affiliation(s)
- Shiyao Liu
- Department of Environmental Science, Graduate School of Fisheries and Environmental Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan
| | - Keiji Maruoka
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto, 606-8502, Japan
| | - Seiji Shirakawa
- Department of Environmental Science, Graduate School of Fisheries and Environmental Sciences, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan
| |
Collapse
|
13
|
Liu S, Maruoka K, Shirakawa S. Chiral Tertiary Sulfonium Salts as Effective Catalysts for Asymmetric Base-Free Neutral Phase-Transfer Reactions. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201612328] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Shiyao Liu
- Department of Environmental Science; Graduate School of Fisheries and Environmental Sciences; Nagasaki University; 1-14 Bunkyo-machi Nagasaki 852-8521 Japan
| | - Keiji Maruoka
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo Kyoto 606-8502 Japan
| | - Seiji Shirakawa
- Department of Environmental Science; Graduate School of Fisheries and Environmental Sciences; Nagasaki University; 1-14 Bunkyo-machi Nagasaki 852-8521 Japan
| |
Collapse
|
14
|
Fleischer I. Chiral Catalyst Design: Cyclopentadiene-Based Brønsted Acids. Angew Chem Int Ed Engl 2016; 55:7582-4. [PMID: 27219010 DOI: 10.1002/anie.201603672] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Indexed: 11/11/2022]
Abstract
The combination of -I and -M effects and the aromaticity of the conjugate base renders the chiral pentacarboxy-substituted cyclopentadienes (PCCPs) acidic. Their convenient synthesis together with substrates derived from the chiral pool and their performance in the tested reactions renders them prodigious candidates to become a new and highly competitive class of chiral Brønsted acid catalysts.
Collapse
Affiliation(s)
- Ivana Fleischer
- Department of Organic Chemistry, University of Regensburg, Universitätsstrasse 31, 93040, Regensburg, Germany.
| |
Collapse
|
15
|
Fleischer I. Design chiraler Katalysatoren: Cyclopentadien-basierte Brønsted-Säuren. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201603672] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ivana Fleischer
- Institut für Organische Chemie; Universität Regensburg; Universitätsstraße 31 93040 Regensburg Deutschland
| |
Collapse
|
16
|
|
17
|
Zong L, Du S, Chin KF, Wang C, Tan CH. Enantioselective Synthesis of Quaternary Carbon Stereocenters: Addition of 3-Substituted Oxindoles to Vinyl Sulfone Catalyzed by Pentanidiums. Angew Chem Int Ed Engl 2015; 54:9390-3. [DOI: 10.1002/anie.201503844] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Revised: 05/25/2015] [Indexed: 12/27/2022]
|
18
|
Zong L, Du S, Chin KF, Wang C, Tan CH. Enantioselective Synthesis of Quaternary Carbon Stereocenters: Addition of 3-Substituted Oxindoles to Vinyl Sulfone Catalyzed by Pentanidiums. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201503844] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
|
19
|
Bew SP, Stephenson GR, Rouden J, Ashford PA, Bourane M, Charvet A, Dalstein VMD, Jauseau R, Hiatt-Gipson GD, Martinez-Lozano LA. Bioinspired, Base- and Metal-Free, Mild Decarboxylative Aldol Activation of Malonic Acid Half Thioesters Under Phase-Transfer Reaction Conditions. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201400915] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
20
|
Zong L, Ban X, Kee CW, Tan CH. Catalytic Enantioselective Alkylation of Sulfenate Anions to Chiral Heterocyclic Sulfoxides Using Halogenated Pentanidium Salts. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201407512] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
|
21
|
Zong L, Ban X, Kee CW, Tan CH. Catalytic Enantioselective Alkylation of Sulfenate Anions to Chiral Heterocyclic Sulfoxides Using Halogenated Pentanidium Salts. Angew Chem Int Ed Engl 2014; 53:11849-53. [DOI: 10.1002/anie.201407512] [Citation(s) in RCA: 108] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Indexed: 01/13/2023]
|
22
|
Shirakawa S, Wang L, He R, Arimitsu S, Maruoka K. A Base-Free Neutral Phase-Transfer Reaction System. Chem Asian J 2014; 9:1586-93. [DOI: 10.1002/asia.201402194] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Indexed: 01/12/2023]
|
23
|
Shirakawa S, Maruoka K. Neue Entwicklungen bei asymmetrischen Phasentransferreaktionen. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201206835] [Citation(s) in RCA: 139] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
24
|
Shirakawa S, Maruoka K. Recent developments in asymmetric phase-transfer reactions. Angew Chem Int Ed Engl 2013; 52:4312-48. [PMID: 23450630 DOI: 10.1002/anie.201206835] [Citation(s) in RCA: 520] [Impact Index Per Article: 47.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Indexed: 11/09/2022]
Abstract
Phase-transfer catalysis has been recognized as a powerful method for establishing practical protocols for organic synthesis, because it offers several advantages, such as operational simplicity, mild reaction conditions, suitability for large-scale synthesis, and the environmentally benign nature of the reaction system. Since the pioneering studies on highly enantioselective alkylations promoted by chiral phase-transfer catalysts, this research field has served as an attractive area for the pursuit of "green" sustainable chemistry. A wide variety of asymmetric transformations catalyzed by chiral onium salts and crown ethers have been developed for the synthesis of valuable organic compounds in the past several decades, especially in recent years.
Collapse
Affiliation(s)
- Seiji Shirakawa
- Laboratory of Synthetic Organic Chemistry, Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | | |
Collapse
|
25
|
Novacek J, Waser M. Bifunctional Chiral Quaternary Ammonium Salt Catalysts: A Rapidly Emerging Class of Powerful Asymmetric Catalysts. European J Org Chem 2012. [DOI: 10.1002/ejoc.201201425] [Citation(s) in RCA: 114] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
|
26
|
Liu XW, Yan Y, Wang YQ, Wang C, Sun J. Highly Enantioselective Reduction of β-Amino Nitroolefins with a Simple N-Sulfinyl Urea as Bifunctional Catalyst. Chemistry 2012; 18:9204-7. [DOI: 10.1002/chem.201201192] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2012] [Indexed: 11/12/2022]
|
27
|
Wang J, Li P, Choy PY, Chan ASC, Kwong FY. Advances and Applications in Organocatalytic Asymmetric aza-Michael Addition. ChemCatChem 2012. [DOI: 10.1002/cctc.201200135] [Citation(s) in RCA: 138] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
28
|
Fochi M, Gramigna L, Mazzanti A, Duce S, Fantini S, Palmieri A, Petrini M, Bernardi L. Solvent-Free Non-Covalent Organocatalysis: Enantioselective Addition of Nitroalkanes to Alkylideneindolenines as a Flexible Gateway to Optically Active Tryptamine Derivatives. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201100737] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
29
|
Enders D, Nguyen TV. Chiral quaternary phosphonium salts: a new class of organocatalysts. Org Biomol Chem 2012; 10:5327-31. [DOI: 10.1039/c2ob25823d] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|