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Zhang Q, Li Y, Wang J, Yang C, Liu C, Li X, Cheng J. B(C
6
F
5
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3
/Chiral Phosphoric Acid Catalyzed Ketimine–Ene Reaction of 2‐Aryl‐3
H
‐indol‐3‐ones and α‐Methylstyrenes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201915226] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Qing‐Xia Zhang
- State Key Laboratory of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 P. R. China
| | - Yao Li
- State Key Laboratory of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 P. R. China
| | - Jie Wang
- State Key Laboratory of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 P. R. China
| | - Chen Yang
- State Key Laboratory of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 P. R. China
| | - Cheng‐Jun Liu
- State Key Laboratory of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 P. R. China
| | - Xin Li
- State Key Laboratory of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 P. R. China
| | - Jin‐Pei Cheng
- State Key Laboratory of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 P. R. China
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Zhang QX, Li Y, Wang J, Yang C, Liu CJ, Li X, Cheng JP. B(C 6 F 5 ) 3 /Chiral Phosphoric Acid Catalyzed Ketimine-Ene Reaction of 2-Aryl-3H-indol-3-ones and α-Methylstyrenes. Angew Chem Int Ed Engl 2020; 59:4550-4556. [PMID: 31943586 DOI: 10.1002/anie.201915226] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 12/30/2019] [Indexed: 11/05/2022]
Abstract
The enantioselective ketimine-ene reaction is one of the most challenging stereocontrolled reaction types in organic synthesis. In this work, catalytic enantioselective ketimine-ene reactions of 2-aryl-3H-indol-3-ones with α-methylstyrenes were achieved by utilizing a B(C6 F5 )3 /chiral phosphoric acid (CPA) catalyst. These ketimine-ene reactions proceed well with low catalyst loading (B(C6 F5 )3 /CPA=2 mol %/2 mol %) under mild conditions, providing rapid and facile access to a series of functionalized 2-allyl-indolin-3-ones with very good reactivity (up to 99 % yield) and excellent enantioselectivity (up to 99 % ee). Theoretical calculations reveal that enhancement of the acidity of the chiral phosphoric acid by B(C6 F5 )3 significantly reduces the activation free energy barrier. Furthermore, collective favorable hydrogen-bonding interactions, especially the enhanced N-H⋅⋅⋅O hydrogen-bonding interaction, differentiates the free energy of the transition states of CPA and B(C6 F5 )3 /CPA, thereby inducing the improvement of stereoselectivity.
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Affiliation(s)
- Qing-Xia Zhang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China
| | - Yao Li
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China
| | - Jie Wang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China
| | - Chen Yang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China
| | - Cheng-Jun Liu
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China
| | - Xin Li
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China
| | - Jin-Pei Cheng
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China
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Misaki T, Tatsumi T, Okamoto T, Hayashi Y, Jin N, Sugimura T. Stereoconvergent 1,4-Addition Reaction of 5H-Oxazol-4-ones with E,Z Isomeric Mixture of Alkylidene β-Ketoesters Catalyzed by Chiral Guanidines. Chemistry 2018; 24:9778-9782. [PMID: 29741785 DOI: 10.1002/chem.201802271] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2018] [Indexed: 12/13/2022]
Abstract
A 1,4-addition reaction of 5H-oxazol-4-ones to alkylidene β-ketoesters, which was catalyzed by using chiral guanidines via a dynamic kinetic resolution process that involved geometric isomerization of the alkylidene β-ketoesters, was developed. This method allowed using E,Z isomeric mixture of various acyclic alkylidene β-ketoesters to obtain the products stereoselectively. The relation between the geometry and the stereoselectivity of products was investigated, and the derivatization of the products to the corresponding α-acyl-γ-lactone was performed.
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Affiliation(s)
- Tomonori Misaki
- Graduate School of Material Science, University of Hyogo, 3-2-1 Kohto, Kamigori, Hyogo, 678-1297, Japan
| | - Toshifumi Tatsumi
- Graduate School of Material Science, University of Hyogo, 3-2-1 Kohto, Kamigori, Hyogo, 678-1297, Japan
| | - Tatsumasa Okamoto
- Graduate School of Material Science, University of Hyogo, 3-2-1 Kohto, Kamigori, Hyogo, 678-1297, Japan
| | - Yusuke Hayashi
- Graduate School of Material Science, University of Hyogo, 3-2-1 Kohto, Kamigori, Hyogo, 678-1297, Japan
| | - Nari Jin
- Graduate School of Material Science, University of Hyogo, 3-2-1 Kohto, Kamigori, Hyogo, 678-1297, Japan
| | - Takashi Sugimura
- Graduate School of Material Science, University of Hyogo, 3-2-1 Kohto, Kamigori, Hyogo, 678-1297, Japan
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Mitra R, Niemeyer J. Dual Brønsted-acid Organocatalysis: Cooperative Asymmetric Catalysis with Combined Phosphoric and Carboxylic Acids. ChemCatChem 2018. [DOI: 10.1002/cctc.201701698] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Raja Mitra
- Institute of Organic Chemistry; Department of Chemistry; University of Duisburg-Essen; Universitätsstrasse 7 45141 Essen Germany
| | - Jochen Niemeyer
- Institute of Organic Chemistry; Department of Chemistry; University of Duisburg-Essen; Universitätsstrasse 7 45141 Essen Germany
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Chiral Calcium-BINOL Phosphate Catalyzed Diastereo- and Enantioselective Synthesis ofsyn-1,2-Disubstituted 1,2-Diamines: Scope and Mechanistic Studies. Chemistry 2014; 21:1704-12. [DOI: 10.1002/chem.201405286] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Indexed: 11/07/2022]
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6
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Hsiao CC, Liao HH, Rueping M. Enantio- and Diastereoselective Access to Distant Stereocenters Embedded within Tetrahydroxanthenes: Utilizingortho-Quinone Methides as Reactive Intermediates in Asymmetric Brønsted Acid Catalysis. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201406587] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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7
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Hsiao CC, Liao HH, Rueping M. Enantio- and Diastereoselective Access to Distant Stereocenters Embedded within Tetrahydroxanthenes: Utilizingortho-Quinone Methides as Reactive Intermediates in Asymmetric Brønsted Acid Catalysis. Angew Chem Int Ed Engl 2014; 53:13258-63. [DOI: 10.1002/anie.201406587] [Citation(s) in RCA: 195] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Indexed: 11/10/2022]
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Prévost S, Dupré N, Leutzsch M, Wang Q, Wakchaure V, List B. Catalytic asymmetric Torgov cyclization: a concise total synthesis of (+)-estrone. Angew Chem Int Ed Engl 2014; 53:8770-3. [PMID: 25080299 DOI: 10.1002/anie.201404909] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Indexed: 11/10/2022]
Abstract
An asymmetric Torgov cyclization, catalyzed by a novel, highly Brønsted acidic dinitro-substituted disulfonimide, is described. The reaction delivers the Torgov diene and various analogues with excellent yields and enantioselectivity. This method was applied in a very short synthesis of (+)-estrone.
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Affiliation(s)
- Sébastien Prévost
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr (Germany)
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Prévost S, Dupré N, Leutzsch M, Wang Q, Wakchaure V, List B. Die katalytische asymmetrische Torgov-Cyclisierung: eine kurze Totalsynthese von (+)-Estron. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201404909] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Lee A, Scheidt KA. A cooperative N-heterocyclic carbene/chiral phosphate catalysis system for allenolate annulations. Angew Chem Int Ed Engl 2014; 53:7594-8. [PMID: 24895280 PMCID: PMC4142640 DOI: 10.1002/anie.201403446] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Revised: 04/08/2014] [Indexed: 11/09/2022]
Abstract
The highly enantioselective NHC-catalyzed [3+2] annulation reaction with α,β-alkynals and α-ketoesters has been developed. A new mode of cooperative catalysis involving the combination of a chiral Brønsted acid and a C1-symmetric biaryl saturated-imidazolium precatalyst was required to generate the desired γ-crotonolactones in high yields and levels of enantioselectivity.
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Affiliation(s)
- Anna Lee
- Department of Chemistry Center for Molecular Innovation and Drug Discovery Northwestern University 2145 Sheridan Road, Evanston, IL 60208 (USA)
| | - Karl A. Scheidt
- Department of Chemistry Center for Molecular Innovation and Drug Discovery Northwestern University 2145 Sheridan Road, Evanston, IL 60208 (USA)
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Lee A, Scheidt KA. A Cooperative N-Heterocyclic Carbene/Chiral Phosphate Catalysis System for Allenolate Annulations. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403446] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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12
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Truong PM, Zavalij PY, Doyle MP. Highly Enantioselective Carbonyl–Ene Reactions of 2,3‐Diketoesters: Efficient and Atom‐Economical Process to Functionalized Chiral α‐Hydroxy‐β‐Ketoesters. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201402233] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Phong M. Truong
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742 (USA)
| | - Peter Y. Zavalij
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742 (USA)
| | - Michael P. Doyle
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742 (USA)
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Truong PM, Zavalij PY, Doyle MP. Highly Enantioselective Carbonyl–Ene Reactions of 2,3‐Diketoesters: Efficient and Atom‐Economical Process to Functionalized Chiral α‐Hydroxy‐β‐Ketoesters. Angew Chem Int Ed Engl 2014; 53:6468-72. [DOI: 10.1002/anie.201402233] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2014] [Revised: 03/12/2014] [Indexed: 11/12/2022]
Affiliation(s)
- Phong M. Truong
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742 (USA)
| | - Peter Y. Zavalij
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742 (USA)
| | - Michael P. Doyle
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742 (USA)
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Zhang Y, Zhu Y, Zheng L, Zhuo LG, Yang F, Dang Q, Yu ZX, Bai X. On-Demand Selection of the Reaction Path from Imino Diels-Alder to Ene-Type Cyclization: Synthesis of Epiminopyrimido[4,5-b]azepines. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301318] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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15
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Hsiao CC, Liao HH, Sugiono E, Atodiresei I, Rueping M. Shedding Light on Organocatalysis-Light-Assisted Asymmetric Ion-Pair Catalysis for the Enantioselective Hydrogenation of Pyrylium Ions. Chemistry 2013; 19:9775-9. [DOI: 10.1002/chem.201300766] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 02/26/2013] [Indexed: 11/08/2022]
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16
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Rueping M, Maji MS, Küçük HB, Atodiresei I. Asymmetrische Brønsted-Säure-katalysierte Cycloadditionen - effiziente enantioselektive Synthese von Pyrazolidinen, Pyrazolinen und 1,3-Diaminen ausN-Acylhydrazonen und Alkenen. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201205813] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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17
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Rueping M, Maji MS, Küçük HB, Atodiresei I. Asymmetric Brønsted Acid Catalyzed Cycloadditions-Efficient Enantioselective Synthesis of Pyrazolidines, Pyrazolines, and 1,3-Diamines fromN-Acyl Hyrazones and Alkenes. Angew Chem Int Ed Engl 2012; 51:12864-8. [DOI: 10.1002/anie.201205813] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Indexed: 11/11/2022]
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18
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Seebach D, Beck AK, Bichsel HU, Pichota A, Sparr C, Wünsch R, Schweizer WB. Preparation and Characterization of New C2- and C1-Symmetric Nitrogen, Oxygen, Phosphorous, and Sulfur Derivatives and Analogs of TADDOL. Part III. Helv Chim Acta 2012. [DOI: 10.1002/hlca.201200148] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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19
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Raja S, Ieawsuwan W, Korotkov V, Rueping M. Asymmetric Brønsted Acid-Catalyzed Nazarov Cyclization of Acyclic α-Alkoxy Dienones. Chem Asian J 2012; 7:2361-6. [DOI: 10.1002/asia.201200391] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2012] [Indexed: 11/07/2022]
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20
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Liu ZM, Zhao H, Li MQ, Lan YB, Yao QB, Tao JC, Wang XW. Chiral Phosphoric Acid-Catalyzed Asymmetric Oxidation of Aryl Alkyl Sulfides and Aldehyde-Derived 1,3-Dithianes: Using Aqueous Hydrogen Peroxide as the Terminal Oxidant. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201100810] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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21
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Rueping M, Bootwicha T, Kambutong S, Sugiono E. Asymmetric Calcium Catalysis: Highly Enantioselective Carbonyl-Ene and Friedel-Crafts Reactions for the Synthesis of Quaternary α-Hydroxy Esters Bearing a Trifluoromethyl Group. Chem Asian J 2012; 7:1195-8. [DOI: 10.1002/asia.201200063] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Indexed: 11/06/2022]
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22
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Rueping M, Volla CMR, Bolte M, Raabe G. General and Efficient Organocatalytic Synthesis of Indoloquinolizidines, Pyridoquinazolines and Quinazolinones through a One-Pot Domino Michael Addition-Cyclization- Pictet-Spengler or 1,2-Amine Addition Reaction. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201100258] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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23
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Shen LT, Shao PL, Ye S. N-Heterocyclic Carbene-Catalyzed Cyclization of Unsaturated Acyl Chlorides and Ketones. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201100178] [Citation(s) in RCA: 162] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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24
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Rueping M, Nachtsheim BJ, Ieawsuwan W, Atodiresei I. Modulation der Acidität - hoch acide Brønsted-Säuren in der asymmetrischen Katalyse. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201100169] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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25
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Rueping M, Nachtsheim BJ, Ieawsuwan W, Atodiresei I. Modulating the Acidity: Highly Acidic Brønsted Acids in Asymmetric Catalysis. Angew Chem Int Ed Engl 2011; 50:6706-20. [DOI: 10.1002/anie.201100169] [Citation(s) in RCA: 226] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2011] [Indexed: 11/09/2022]
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26
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Yang M, Zhao YM, Zhang SY, Tu YQ, Zhang FM. Chiral Brønsted Acid-Promoted Enantioselective Desymmetrization in an Intramolecular Schmidt Reaction of Symmetric Azido 1,3-Hexanediones: Asymmetric Synthesis of Azaquaternary Pyrroloazepine Skeletons. Chem Asian J 2011; 6:1344-7. [DOI: 10.1002/asia.201100171] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2011] [Indexed: 11/06/2022]
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Schenker S, Zamfir A, Freund M, Tsogoeva SB. Developments in Chiral Binaphthyl‐Derived Brønsted/Lewis Acids and Hydrogen‐Bond‐Donor Organocatalysis. European J Org Chem 2011. [DOI: 10.1002/ejoc.201001538] [Citation(s) in RCA: 160] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sebastian Schenker
- Department of Chemistry and Pharmacy Chair of Organic Chemistry I University of Erlangen‐Nuremberg Henkestrasse 42, 91054 Erlangen, Germany, Fax: +49‐9131‐85‐26865
| | - Alexandru Zamfir
- Department of Chemistry and Pharmacy Chair of Organic Chemistry I University of Erlangen‐Nuremberg Henkestrasse 42, 91054 Erlangen, Germany, Fax: +49‐9131‐85‐26865
| | - Matthias Freund
- Department of Chemistry and Pharmacy Chair of Organic Chemistry I University of Erlangen‐Nuremberg Henkestrasse 42, 91054 Erlangen, Germany, Fax: +49‐9131‐85‐26865
| | - Svetlana B. Tsogoeva
- Department of Chemistry and Pharmacy Chair of Organic Chemistry I University of Erlangen‐Nuremberg Henkestrasse 42, 91054 Erlangen, Germany, Fax: +49‐9131‐85‐26865
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Rueping M, Raja S, Núñez A. Asymmetric Brønsted Acid-Catalyzed Friedel-Crafts Reactions of Indoles with Cyclic Imines - Efficient Generation of Nitrogen-Substituted Quaternary Carbon Centers. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201000952] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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29
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Zheng K, Yin C, Liu X, Lin L, Feng X. Catalytic Asymmetric Addition of Alkyl Enol Ethers to 1,2-Dicarbonyl Compounds: Highly Enantioselective Synthesis of Substituted 3-Alkyl-3-Hydroxyoxindoles. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201007145] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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30
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Zheng K, Yin C, Liu X, Lin L, Feng X. Catalytic Asymmetric Addition of Alkyl Enol Ethers to 1,2-Dicarbonyl Compounds: Highly Enantioselective Synthesis of Substituted 3-Alkyl-3-Hydroxyoxindoles. Angew Chem Int Ed Engl 2011; 50:2573-7. [DOI: 10.1002/anie.201007145] [Citation(s) in RCA: 114] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2010] [Indexed: 11/08/2022]
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31
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Luo J, Wang H, Han X, Xu LW, Kwiatkowski J, Huang KW, Lu Y. The Direct Asymmetric Vinylogous Aldol Reaction of Furanones with α-Ketoesters: Access to Chiral γ-Butenolides and Glycerol Derivatives. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201006316] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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32
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Luo J, Wang H, Han X, Xu LW, Kwiatkowski J, Huang KW, Lu Y. The Direct Asymmetric Vinylogous Aldol Reaction of Furanones with α-Ketoesters: Access to Chiral γ-Butenolides and Glycerol Derivatives. Angew Chem Int Ed Engl 2011; 50:1861-4. [DOI: 10.1002/anie.201006316] [Citation(s) in RCA: 111] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2010] [Revised: 12/03/2010] [Indexed: 11/09/2022]
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33
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Zhang Z, Zheng W, Antilla JC. Highly Enantioselective Catalytic Benzoyloxylation of 3-Aryloxindoles Using Chiral VAPOL Calcium Phosphate. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201006595] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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34
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Hirata T, Yamanaka M. DFT Study of Chiral-Phosphoric-Acid-Catalyzed Enantioselective Friedel-Crafts Reaction of Indole with Nitroalkene: Bifunctionality and Substituent Effect of Phosphoric Acid. Chem Asian J 2010; 6:510-6. [DOI: 10.1002/asia.201000596] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2010] [Indexed: 11/05/2022]
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35
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Zhang Z, Zheng W, Antilla JC. Highly enantioselective catalytic benzoyloxylation of 3-aryloxindoles using chiral VAPOL calcium phosphate. Angew Chem Int Ed Engl 2010; 50:1135-8. [PMID: 21268212 DOI: 10.1002/anie.201006595] [Citation(s) in RCA: 133] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2010] [Indexed: 11/07/2022]
Affiliation(s)
- Zuhui Zhang
- Department of Chemistry, University of South Florida, 4202 E. Fowler Avenue, CHE 205A, Tampa, FL 33620, USA
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36
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Wang T, Zhang GW, Teng Y, Nie J, Zheng Y, Ma JA. Chiral Brønsted Acid-Catalyzed Enantioselective Friedel-Crafts Reaction of 4,7-Dihydroindoles with Trifluoromethyl Ketones. Adv Synth Catal 2010. [DOI: 10.1002/adsc.201000510] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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37
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Rueping M, Merino E, Koenigs RM. First Highly Enantioselective Synthesis of Benzodiazepinones by Catalytic Hydrogenation. Adv Synth Catal 2010. [DOI: 10.1002/adsc.201000547] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Rueping M, Nachtsheim BJ, Koenigs RM, Ieawsuwan W. Synthesis and Structural Aspects ofN-Triflylphosphoramides and Their Calcium Salts-Highly Acidic and Effective Brønsted Acids. Chemistry 2010; 16:13116-26. [DOI: 10.1002/chem.201001438] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Zhao JF, Tan BH, Zhu MK, Tjan TB, Loh TP. Enantioselective Carbonyl‐Ene Reactions of Trifluoropyruvate in Ionic Liquid
via
a Recyclable Indium(III)‐Pybox Complex. Adv Synth Catal 2010. [DOI: 10.1002/adsc.201000170] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jun Feng Zhao
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Fax: (+65)‐6791‐1961
| | - Boon Hong Tan
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Fax: (+65)‐6791‐1961
| | - Ming Kui Zhu
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Fax: (+65)‐6791‐1961
| | - Teguh Budiono W. Tjan
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Fax: (+65)‐6791‐1961
| | - Teck Peng Loh
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Fax: (+65)‐6791‐1961
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Zheng K, Yang Y, Zhao J, Yin C, Lin L, Liu X, Feng X. The Magnesium(II)-Catalyzed Asymmetric Ketone-Ene Reaction under Solvent-Free Conditions: Stereocontrolled Access to Enantioenriched Trifluoromethyl-Substituted Compounds. Chemistry 2010; 16:9969-72. [DOI: 10.1002/chem.201001412] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ogawa S, Iida N, Tokunaga E, Shiro M, Shibata N. Cinchona Alkaloid/TiIV-Catalyzed Enantioselective Enamine-Trifluoropyruvate Condensation-Cyclization Reaction and Its Application to Drug-like Heterocycles. Chemistry 2010; 16:7090-5. [DOI: 10.1002/chem.201000911] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Hatano M, Moriyama K, Maki T, Ishihara K. Which Is the Actual Catalyst: Chiral Phosphoric Acid or Chiral Calcium Phosphate? Angew Chem Int Ed Engl 2010; 49:3823-6. [DOI: 10.1002/anie.201000824] [Citation(s) in RCA: 213] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Hatano M, Moriyama K, Maki T, Ishihara K. Which Is the Actual Catalyst: Chiral Phosphoric Acid or Chiral Calcium Phosphate? Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201000824] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Rueping M, Lin MY. Catalytic Asymmetric Mannich-Ketalization Reaction: Highly Enantioselective Synthesis of Aminobenzopyrans. Chemistry 2010; 16:4169-72. [DOI: 10.1002/chem.201000203] [Citation(s) in RCA: 105] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Rueping M, Sugiono E, Steck A, Theissmann T. Synthesis and Application of Polymer-Supported Chiral Brønsted Acid Organocatalysts. Adv Synth Catal 2010. [DOI: 10.1002/adsc.200900746] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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46
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Rueping M, Tato F, Schoepke F. The First General, Efficient and Highly Enantioselective Reduction of Quinoxalines and Quinoxalinones. Chemistry 2010; 16:2688-91. [DOI: 10.1002/chem.200902907] [Citation(s) in RCA: 165] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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47
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Barnett DS, Moquist PN, Schaus SE. The mechanism and an improved asymmetric allylboration of ketones catalyzed by chiral biphenols. Angew Chem Int Ed Engl 2010; 48:8679-82. [PMID: 19816902 DOI: 10.1002/anie.200904715] [Citation(s) in RCA: 141] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- David S Barnett
- Department of Chemistry, Center for Chemical Methodology and Library Development at Boston University, Life Science and Engineering Building, Boston University, 24 Cummington Street, Boston, Massachusetts, 02215, USA
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Barnett D, Moquist P, Schaus S. The Mechanism and an Improved Asymmetric Allylboration of Ketones Catalyzed by Chiral Biphenols. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200904715] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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49
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Jiang J, Qing J, Gong LZ. Asymmetric Synthesis of 3-Amino-δ-lactams and Benzo[a]quinolizidines by Catalytic Cyclization Reactions Involving Azlactones. Chemistry 2009; 15:7031-4. [DOI: 10.1002/chem.200900814] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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50
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Rueping M, Antonchick A, Sugiono E, Grenader K. Asymmetrische Brønsted-Säure-Katalyse: katalytische enantioselektive Synthese von hochaktiven Dihydrochinazolinon-Wirkstoffen. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200804770] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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