1
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Ali K, Panda G. Transition-Metal-Free Multicomponent Approach to the Regioselective Synthesis of Highly Substituted N-Alkylpyrazoles. Chem Asian J 2023; 18:e202201129. [PMID: 36585904 DOI: 10.1002/asia.202201129] [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: 11/08/2022] [Revised: 12/22/2022] [Accepted: 12/28/2022] [Indexed: 01/01/2023]
Abstract
An efficient transition-metal-free multicomponent approach to the regioselective synthesis of highly substituted N-alkylpyrazoles through 1,6-addition of pyrazole (in situ generated from α,β-unsaturated aldehyde and hydrazide) to para-Quinone Methides has been developed. The N-alkylpyrazole containing triarylmethanes having several heteroaryl rings (quinoline, pyridine, thiophene) at the central methine carbon atom was developed. This chemical process may be used for large-scale synthesis and provides a novel way to produce triarylmethanes with diverse functional groups.
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Affiliation(s)
- Kasim Ali
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Lucknow, 226031, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, 201002, India
| | - Gautam Panda
- Medicinal & Process Chemistry Division, CSIR-Central Drug Research Institute, Sector 10, Jankipuram Extension, Lucknow, 226031, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, 201002, India
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2
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Wu X, Sparr C. Stereoselective Synthesis of Atropisomeric Acridinium Salts by the Catalyst‐Controlled Cyclization of
ortho
‐Quinone Methide Iminiums. Angew Chem Int Ed Engl 2022; 61:e202201424. [PMID: 35167176 PMCID: PMC9306694 DOI: 10.1002/anie.202201424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Indexed: 11/07/2022]
Abstract
Quinone methides are fundamental intermediates for a wide range of reactions in which catalyst stereocontrol is often achieved by hydrogen bonding. Herein, we describe the feasibility of an intramolecular Friedel–Crafts 6π electrocyclization through ortho‐quinone methide iminiums stereocontrolled by a contact ion pair. A disulfonimide catalyst activates racemic trichloroacetimidate substrates and imparts stereocontrol in the cyclization step, providing a new avenue for selective ortho‐quinone methide iminium functionalization. A highly stereospecific oxidation readily transforms the enantioenriched acridanes into rotationally restricted acridiniums. Upon ion exchange, the method selectively affords atropisomeric acridinium tetrafluoroborate salts in high yields and an enantioenrichment of up to 93 : 7 e.r. We envision that ion‐pairing catalysis over ortho‐quinone methide iminiums enables the selective synthesis of a diversity of heterocycles and aniline derivatives with distinct stereogenic units.
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Affiliation(s)
- Xingxing Wu
- Department of ChemistryUniversity of BaselSt. Johanns-Ring 194056BaselSwitzerland
- NCCR Molecular Systems Engineering, BPR 1095Mattenstrasse 24a4058BaselSwitzerland
| | - Christof Sparr
- Department of ChemistryUniversity of BaselSt. Johanns-Ring 194056BaselSwitzerland
- NCCR Molecular Systems Engineering, BPR 1095Mattenstrasse 24a4058BaselSwitzerland
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3
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Hornung JE, Weinrich T, Göbel MW. Directed Crosslinking of RNA by Glutathione‐Triggered PNA‐Quinone‐Methide‐Conjugates. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jan-Erik Hornung
- Goethe-Universitat Frankfurt am Main Institut für Organische Chemie und Chemische Biologie GERMANY
| | - Timo Weinrich
- Goethe-Universitat Frankfurt am Main Institut für Organische Chemie und Chemische Biologie GERMANY
| | - Michael W. Göbel
- Goethe-Universität Frankfurt Institut für Organische Chemie und Chemi Max-von-Laue-Str. 7 60438 Frankfurt am Main GERMANY
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4
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Wu X, Sparr C. Stereoselective Synthesis of Atropisomeric Acridinium Salts by the Catalyst‐Controlled Cyclization of
ortho
‐Quinone Methide Iminiums. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201424] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Xingxing Wu
- Department of Chemistry University of Basel St. Johanns-Ring 19 4056 Basel Switzerland
- NCCR Molecular Systems Engineering, BPR 1095 Mattenstrasse 24a 4058 Basel Switzerland
| | - Christof Sparr
- Department of Chemistry University of Basel St. Johanns-Ring 19 4056 Basel Switzerland
- NCCR Molecular Systems Engineering, BPR 1095 Mattenstrasse 24a 4058 Basel Switzerland
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5
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Luo C, Zhou T, Wang W, Han P, Jing L. An Efficient Approach to Access 2,2‐Diarylanilines via Visible‐Light‐Promoted Decarboxylative Cross‐Coupling Reactions. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100458] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Cong Luo
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province China West Normal University No.1 Shi Da Road Nanchong 637009 P. R. China
| | - Tongyao Zhou
- Pharmaceutical Research Institute Wuhan Institute of Technology No.206, Guanggu 1st road Wuhan 430205 P. R. China
| | - Wei Wang
- Pharmaceutical Research Institute Wuhan Institute of Technology No.206, Guanggu 1st road Wuhan 430205 P. R. China
| | - Pan Han
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province China West Normal University No.1 Shi Da Road Nanchong 637009 P. R. China
| | - Linhai Jing
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province China West Normal University No.1 Shi Da Road Nanchong 637009 P. R. China
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6
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Zhong Q, Richardson JJ, He A, Zheng T, Lafleur RPM, Li J, Qiu W, Furtado D, Pan S, Xu Z, Wan L, Caruso F. Engineered Coatings via the Assembly of Amino‐Quinone Networks. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202010931] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Qi‐Zhi Zhong
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
| | - Joseph J. Richardson
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
| | - Ai He
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China
| | - Tian Zheng
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
| | - René P. M. Lafleur
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
| | - Jianhua Li
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
| | - Wen‐Ze Qiu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China
| | - Denzil Furtado
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
| | - Shuaijun Pan
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
| | - Zhi‐Kang Xu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China
| | - Ling‐Shu Wan
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China
| | - Frank Caruso
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
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7
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Cheng PM, Cai LX, Li SC, Hu SJ, Yan DN, Zhou LP, Sun QF. Guest-Reaction Driven Cage to Conjoined Twin-Cage Mitosis-Like Host Transformation. Angew Chem Int Ed Engl 2020; 59:23569-23573. [PMID: 32902925 DOI: 10.1002/anie.202011474] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Indexed: 12/12/2022]
Abstract
We report here a guest-reaction-induced mitosis-like host transformation from a known Pd4 L2 cage 1 to a conjoined Pd6 L3 twin-cage 2 featuring two separate cavities. The encapsulation of 1-hydroxymethyl-2-naphthol (G1), a known ortho-quinone methide (o-QMs) precursor, within the hydrophobic cavity of cage 1 is found crucial to realize the cage to twin-cage conversion. Confined G1 molecules within the nanocavity undergo self-coupling dimerization reaction to form 2,2'-dihydroxy-1,1'-dinaphthylmethane (G2) which then triggers the cage to twin-cage mitosis. The same conversion also proceeds, in a much faster rate, via the direct templation of G2, confirming the induced-fit transformation mechanism. The structure of the (G2)2 ⊂2 host-guest complex has been established by X-ray crystallographic study, where cis- to trans- conformational switch on one bridging ligand is revealed.
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Affiliation(s)
- Pei-Ming Cheng
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, PR China.,College of Chemistry and Material Science, Fujian Normal University, Fuzhou, 350007, PR China
| | - Li-Xuan Cai
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, PR China
| | - Shao-Chuan Li
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, PR China.,University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Shao-Jun Hu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, PR China.,University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Dan-Ni Yan
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, PR China.,University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Li-Peng Zhou
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, PR China
| | - Qing-Fu Sun
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, PR China.,University of Chinese Academy of Sciences, Beijing, 100049, PR China
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8
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Zhong Q, Richardson JJ, He A, Zheng T, Lafleur RPM, Li J, Qiu W, Furtado D, Pan S, Xu Z, Wan L, Caruso F. Engineered Coatings via the Assembly of Amino‐Quinone Networks. Angew Chem Int Ed Engl 2020; 60:2346-2354. [DOI: 10.1002/anie.202010931] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Indexed: 12/24/2022]
Affiliation(s)
- Qi‐Zhi Zhong
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
| | - Joseph J. Richardson
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
| | - Ai He
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China
| | - Tian Zheng
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
| | - René P. M. Lafleur
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
| | - Jianhua Li
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
| | - Wen‐Ze Qiu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China
| | - Denzil Furtado
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
| | - Shuaijun Pan
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
| | - Zhi‐Kang Xu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China
| | - Ling‐Shu Wan
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027 China
| | - Frank Caruso
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia
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9
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Cheng P, Cai L, Li S, Hu S, Yan D, Zhou L, Sun Q. Guest‐Reaction Driven Cage to Conjoined Twin‐Cage Mitosis‐Like Host Transformation. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202011474] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Pei‐Ming Cheng
- State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 PR China
- College of Chemistry and Material Science Fujian Normal University Fuzhou 350007 PR China
| | - Li‐Xuan Cai
- State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 PR China
| | - Shao‐Chuan Li
- State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 PR China
- University of Chinese Academy of Sciences Beijing 100049 PR China
| | - Shao‐Jun Hu
- State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 PR China
- University of Chinese Academy of Sciences Beijing 100049 PR China
| | - Dan‐Ni Yan
- State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 PR China
- University of Chinese Academy of Sciences Beijing 100049 PR China
| | - Li‐Peng Zhou
- State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 PR China
| | - Qing‐Fu Sun
- State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 PR China
- University of Chinese Academy of Sciences Beijing 100049 PR China
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10
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Liang X, Xu H, Li H, Chen L, Lu H. Recyclable Bismuth Complex Catalyzed 1,6-Conjugate Addition of Various Nucleophiles to para
-Quinone Methides: Expedient Access to Unsymmetrical Diaryl- and Triarylmethanes. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901732] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Xianghao Liang
- School of Environmental and Chemical Engineering; Jiangsu University of Science and Technology; 212003 Zhenjiang Jiangsu China
| | - Haiyan Xu
- School of Environmental and Chemical Engineering; Jiangsu University of Science and Technology; 212003 Zhenjiang Jiangsu China
| | - Hanlin Li
- School of Environmental and Chemical Engineering; Jiangsu University of Science and Technology; 212003 Zhenjiang Jiangsu China
| | - Lizhuang Chen
- School of Environmental and Chemical Engineering; Jiangsu University of Science and Technology; 212003 Zhenjiang Jiangsu China
| | - Hongfei Lu
- School of Environmental and Chemical Engineering; Jiangsu University of Science and Technology; 212003 Zhenjiang Jiangsu China
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11
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Liou YC, Karanam P, Jang YJ, Lin W. Synthesis of Functionalized Benzofurans from para-Quinone Methides via Phospha-1,6-Addition/O-Acylation/Wittig Pathway. Org Lett 2019; 21:8008-8012. [DOI: 10.1021/acs.orglett.9b03001] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yan-Cheng Liou
- Department of Chemistry, National Taiwan Normal University, 88, Sec. 4, Tingchow Road, Taipei 11677, Taiwan, R.O.C
| | - Praneeth Karanam
- Department of Chemistry, National Taiwan Normal University, 88, Sec. 4, Tingchow Road, Taipei 11677, Taiwan, R.O.C
| | - Yeong-Jiunn Jang
- Chinese Medicine Research and Development Center, China Medical University Hospital, 2, Yuh-Der Road, Taichung 40447, Taiwan, R.O.C
| | - Wenwei Lin
- Department of Chemistry, National Taiwan Normal University, 88, Sec. 4, Tingchow Road, Taipei 11677, Taiwan, R.O.C
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12
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Zhang B, Liu L, Mao S, Zhou MD, Wang H, Li L. Base-Catalyzed 1,6-Hydrophosphonylation of p
-Quinone Methides with Diphenylphosphane Oxide/Phosphites. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900606] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Bin Zhang
- School of Chemistry and Materials Science; Liaoning Shihua University; Dandong Road 1, Fushun 113001 P. R. China
| | - Lu Liu
- School of Chemistry and Materials Science; Liaoning Shihua University; Dandong Road 1, Fushun 113001 P. R. China
| | - Shukuan Mao
- School of Chemistry and Materials Science; Liaoning Shihua University; Dandong Road 1, Fushun 113001 P. R. China
| | - Ming-Dong Zhou
- School of Chemistry and Materials Science; Liaoning Shihua University; Dandong Road 1, Fushun 113001 P. R. China
| | - He Wang
- School of Chemistry and Materials Science; Liaoning Shihua University; Dandong Road 1, Fushun 113001 P. R. China
| | - Lei Li
- School of Chemistry and Materials Science; Liaoning Shihua University; Dandong Road 1, Fushun 113001 P. R. China
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13
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Satbhaiya S, Khonde NS, Rathod J, Gonnade R, Kumar P. Tf2
NH catalyzed 1,6-conjugate addition of 2-hydroxy-p
-quinone methides with β
-Functionalized Ketones: Access to 2,3,4,9-Tetrahydro-1H
-xanthenones and 4H
-Chromene Derivatives. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900370] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Shruti Satbhaiya
- CSIR-National Chemical Laboratory; Division of Organic chemistry; Dr. Homi Bhabha Road Pune -411008 India
| | - Nilesh S. Khonde
- CSIR-National Chemical Laboratory; Division of Organic chemistry; Dr. Homi Bhabha Road Pune -411008 India
- Academy of Scientific and Innovative Research (AcSIR); Ghaziabad 201002 India
| | - Jayant Rathod
- CSIR-National Chemical Laboratory; Division of Organic chemistry; Dr. Homi Bhabha Road Pune -411008 India
- Academy of Scientific and Innovative Research (AcSIR); Ghaziabad 201002 India
| | - Rajesh Gonnade
- Academy of Scientific and Innovative Research (AcSIR); Ghaziabad 201002 India
- Physical and Material Chemistry Division; CSIR-National Chemical Laboratory; Dr. Homi Bhabha Road Pune -411008 India
| | - Pradeep Kumar
- CSIR-National Chemical Laboratory; Division of Organic chemistry; Dr. Homi Bhabha Road Pune -411008 India
- Academy of Scientific and Innovative Research (AcSIR); Ghaziabad 201002 India
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14
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Yang B, Yao W, Xia XF, Wang D. Mn-Catalyzed 1,6-conjugate addition/aromatization of para-quinone methides. Org Biomol Chem 2019; 16:4547-4557. [PMID: 29873652 DOI: 10.1039/c8ob01057a] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of ferrocenyl triazole ligands have been synthesized and characterized, which proved to be effective for the Mn-catalyzed 1,6-conjugate addition/aromatization of para-quinone methides with good to high yields under mild conditions. This protocol provided an efficient and practical route to the synthetically interesting functionalized quinones, methines and their analogues.
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Affiliation(s)
- Bobin Yang
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, Jiangsu Province, China.
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15
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Jiang C, Chen Y, Huang G, Ni C, Liu X, Lu H. Scandium(III)-Catalysed Decarboxylative Addition of β-
Ketoacids to para
-Quinone Methides: Evidence for 1,6-Addition and Base-Assisted Decarboxylation Tandem Process. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201800729] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Chunhui Jiang
- School of Environmental and Chemical Engineering; Jiangsu University of Science and Technology; 2 Mengxi Road, Zhenjiang Jiangsu 212003 China
| | - Yayun Chen
- School of Environmental and Chemical Engineering; Jiangsu University of Science and Technology; 2 Mengxi Road, Zhenjiang Jiangsu 212003 China
| | - Gaokui Huang
- School of Environmental and Chemical Engineering; Jiangsu University of Science and Technology; 2 Mengxi Road, Zhenjiang Jiangsu 212003 China
| | - Cheng Ni
- School of Environmental and Chemical Engineering; Jiangsu University of Science and Technology; 2 Mengxi Road, Zhenjiang Jiangsu 212003 China
| | - Xiaoqian Liu
- School of pharmaceutical and life science; Changzhou University
| | - Hongfei Lu
- School of Environmental and Chemical Engineering; Jiangsu University of Science and Technology; 2 Mengxi Road, Zhenjiang Jiangsu 212003 China
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16
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Li W, Xu X, Zhang P, Li P. Recent Advances in the Catalytic Enantioselective Reactions of para
-Quinone Methides. Chem Asian J 2018; 13:2350-2359. [DOI: 10.1002/asia.201800415] [Citation(s) in RCA: 110] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 04/19/2018] [Indexed: 12/17/2022]
Affiliation(s)
- Wenjun Li
- Department of Medicinal Chemistry; School of Pharmacy; Qingdao University; 38 Dengzhou Road Qingdao Shandong 266021 P. R. China
| | - Xianhong Xu
- Department of Medicinal Chemistry; School of Pharmacy; Qingdao University; 38 Dengzhou Road Qingdao Shandong 266021 P. R. China
| | - Pengfei Zhang
- Department of Chemistry; Southern University of Science and Technology; 1088 Xueyuan Blvd. Nanshan District Shenzhen, Guangdong 518055 P. R. China
| | - Pengfei Li
- Department of Chemistry; Southern University of Science and Technology; 1088 Xueyuan Blvd. Nanshan District Shenzhen, Guangdong 518055 P. R. China
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17
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Gao YY, Hua YZ, Wang MC. Asymmetric 1,6-Conjugate Addition of para
-Quinone Methides for the Synthesis of Chiral β,β
-Diaryl-α
-Hydroxy Ketones. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700947] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yuan-Yuan Gao
- College of Chemistry and Molecular Engineering; Zhengzhou University; 75 Daxue Street Zhengzhou Henan Province 450052 People's Reppublic of China
| | - Yuan-Zhao Hua
- College of Chemistry and Molecular Engineering; Zhengzhou University; 75 Daxue Street Zhengzhou Henan Province 450052 People's Reppublic of China
| | - Min-Can Wang
- College of Chemistry and Molecular Engineering; Zhengzhou University; 75 Daxue Street Zhengzhou Henan Province 450052 People's Reppublic of China
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18
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Kang TC, Wu LP, Yu QW, Wu XY. Enantioselective Rauhut-Currier-Type 1,6-Conjugate Addition of Methyl Vinyl Ketone to para
-Quinone Methides. Chemistry 2017; 23:6509-6513. [DOI: 10.1002/chem.201700520] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Tian-Chen Kang
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; School of Chemistry & Molecular Engineering; East China University of Science and Technology; Shanghai 200237 P. R. China
| | - Lu-Ping Wu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; School of Chemistry & Molecular Engineering; East China University of Science and Technology; Shanghai 200237 P. R. China
| | - Qi-Wen Yu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; School of Chemistry & Molecular Engineering; East China University of Science and Technology; Shanghai 200237 P. R. China
| | - Xin-Yan Wu
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; School of Chemistry & Molecular Engineering; East China University of Science and Technology; Shanghai 200237 P. R. China
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19
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Chen M, Sun J. Catalytic Asymmetric N-Alkylation of Indoles and Carbazoles through 1,6-Conjugate Addition of Aza-para-quinone Methides. Angew Chem Int Ed Engl 2017; 56:4583-4587. [PMID: 28332764 DOI: 10.1002/anie.201701947] [Citation(s) in RCA: 94] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Revised: 03/01/2017] [Indexed: 01/24/2023]
Abstract
Catalytic asymmetric N-alkylation of indoles and carbazoles represents a family of important but underdeveloped reactions. Herein, we describe a new organocatalytic strategy in which in situ generated aza-para-quinone methides are employed as the alkylating reagent. With the proper choice of a chiral phosphoric acid and an N-protective group, the intermolecular C-N bond formation with various indole and carbazole nucleophiles proceeded efficiently under mild conditions with excellent enantioselectivity and functional-group compatibility. Control experiments and kinetic studies provided important insight into the reaction mechanism.
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Affiliation(s)
- Min Chen
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Jianwei Sun
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
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20
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Chen M, Sun J. Catalytic Asymmetric N-Alkylation of Indoles and Carbazoles through 1,6-Conjugate Addition of Aza-para
-quinone Methides. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201701947] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Min Chen
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay, Kowloon Hong Kong SAR China
| | - Jianwei Sun
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay, Kowloon Hong Kong SAR China
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21
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Ke M, Song Q. Copper-Catalyzed 1,6-Hydrodifluoroacetylation ofpara-Quinone Methides at Ambient Temperature with Bis(pinacolato)diboron as Reductant. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201600991] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Miaolin Ke
- Institute of Next Generation Matter Transformation, College of Chemical Engineering; College of Materials Science & Engineering at Huaqiao University; Fujian People's Republic of China
| | - Qiuling Song
- Institute of Next Generation Matter Transformation, College of Chemical Engineering; College of Materials Science & Engineering at Huaqiao University; Fujian People's Republic of China
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22
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Huang B, Shen Y, Mao Z, Liu Y, Cui S. Metathesis Reaction of Diazo Compounds and para-Quinone Methides for C–C Double Bond Formation: Synthesis of Tetrasubstituted Alkenes and Quinolinones. Org Lett 2016; 18:4888-4891. [DOI: 10.1021/acs.orglett.6b02365] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Bo Huang
- Institute
of Drug Discovery and College of Pharmaceutical Sciences, and ‡State Key Laboratory
of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, Zhejiang, China
| | - Yangyong Shen
- Institute
of Drug Discovery and College of Pharmaceutical Sciences, and ‡State Key Laboratory
of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, Zhejiang, China
| | - Zhenjun Mao
- Institute
of Drug Discovery and College of Pharmaceutical Sciences, and ‡State Key Laboratory
of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, Zhejiang, China
| | - Yu Liu
- Institute
of Drug Discovery and College of Pharmaceutical Sciences, and ‡State Key Laboratory
of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, Zhejiang, China
| | - Sunliang Cui
- Institute
of Drug Discovery and College of Pharmaceutical Sciences, and ‡State Key Laboratory
of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, Zhejiang, China
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23
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Zhao K, Zhi Y, Shu T, Valkonen A, Rissanen K, Enders D. Organocatalytic Domino Oxa-Michael/1,6-Addition Reactions: Asymmetric Synthesis of Chromans Bearing Oxindole Scaffolds. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201606947] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Kun Zhao
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Ying Zhi
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Tao Shu
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Arto Valkonen
- Department of Chemistry; Nanoscience Center; University of Jyvaskyla; 40014 JYU Finland
| | - Kari Rissanen
- Department of Chemistry; Nanoscience Center; University of Jyvaskyla; 40014 JYU Finland
| | - Dieter Enders
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
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24
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Zhao K, Zhi Y, Shu T, Valkonen A, Rissanen K, Enders D. Organocatalytic Domino Oxa-Michael/1,6-Addition Reactions: Asymmetric Synthesis of Chromans Bearing Oxindole Scaffolds. Angew Chem Int Ed Engl 2016; 55:12104-8. [DOI: 10.1002/anie.201606947] [Citation(s) in RCA: 197] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Kun Zhao
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Ying Zhi
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Tao Shu
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Arto Valkonen
- Department of Chemistry; Nanoscience Center; University of Jyvaskyla; 40014 JYU Finland
| | - Kari Rissanen
- Department of Chemistry; Nanoscience Center; University of Jyvaskyla; 40014 JYU Finland
| | - Dieter Enders
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
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25
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Dong N, Zhang ZP, Xue XS, Li X, Cheng JP. Phosphoric Acid Catalyzed Asymmetric 1,6-Conjugate Addition of Thioacetic Acid to para
-Quinone Methides. Angew Chem Int Ed Engl 2015; 55:1460-4. [DOI: 10.1002/anie.201509110] [Citation(s) in RCA: 178] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 10/28/2015] [Indexed: 12/11/2022]
Affiliation(s)
- Nan Dong
- State key Laboratory of Elemento-Organic Chemistry; Collaborative Innovation Center of Chemical Science and Engineering; Department of Chemistry (Tianjin); Nankai University; Tianjin 300071 China
| | - Zhi-Pei Zhang
- State key Laboratory of Elemento-Organic Chemistry; Collaborative Innovation Center of Chemical Science and Engineering; Department of Chemistry (Tianjin); Nankai University; Tianjin 300071 China
| | - Xiao-Song Xue
- State key Laboratory of Elemento-Organic Chemistry; Collaborative Innovation Center of Chemical Science and Engineering; Department of Chemistry (Tianjin); Nankai University; Tianjin 300071 China
| | - Xin Li
- State key Laboratory of Elemento-Organic Chemistry; Collaborative Innovation Center of Chemical Science and Engineering; Department of Chemistry (Tianjin); Nankai University; Tianjin 300071 China
| | - Jin-Pei Cheng
- State key Laboratory of Elemento-Organic Chemistry; Collaborative Innovation Center of Chemical Science and Engineering; Department of Chemistry (Tianjin); Nankai University; Tianjin 300071 China
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26
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Dong N, Zhang ZP, Xue XS, Li X, Cheng JP. Phosphoric Acid Catalyzed Asymmetric 1,6-Conjugate Addition of Thioacetic Acid to para
-Quinone Methides. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201509110] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Nan Dong
- State key Laboratory of Elemento-Organic Chemistry; Collaborative Innovation Center of Chemical Science and Engineering; Department of Chemistry (Tianjin); Nankai University; Tianjin 300071 China
| | - Zhi-Pei Zhang
- State key Laboratory of Elemento-Organic Chemistry; Collaborative Innovation Center of Chemical Science and Engineering; Department of Chemistry (Tianjin); Nankai University; Tianjin 300071 China
| | - Xiao-Song Xue
- State key Laboratory of Elemento-Organic Chemistry; Collaborative Innovation Center of Chemical Science and Engineering; Department of Chemistry (Tianjin); Nankai University; Tianjin 300071 China
| | - Xin Li
- State key Laboratory of Elemento-Organic Chemistry; Collaborative Innovation Center of Chemical Science and Engineering; Department of Chemistry (Tianjin); Nankai University; Tianjin 300071 China
| | - Jin-Pei Cheng
- State key Laboratory of Elemento-Organic Chemistry; Collaborative Innovation Center of Chemical Science and Engineering; Department of Chemistry (Tianjin); Nankai University; Tianjin 300071 China
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27
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Wang Z, Wong YF, Sun J. Catalytic Asymmetric 1,6-Conjugate Addition ofpara-Quinone Methides: Formation of All-Carbon Quaternary Stereocenters. Angew Chem Int Ed Engl 2015; 54:13711-4. [DOI: 10.1002/anie.201506701] [Citation(s) in RCA: 188] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Indexed: 11/11/2022]
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28
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Wang Z, Wong YF, Sun J. Catalytic Asymmetric 1,6-Conjugate Addition ofpara-Quinone Methides: Formation of All-Carbon Quaternary Stereocenters. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201506701] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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29
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Lou Y, Cao P, Jia T, Zhang Y, Wang M, Liao J. Copper-Catalyzed Enantioselective 1,6-Boration ofpara-Quinone Methides and Efficient Transformation ofgem-Diarylmethine Boronates to Triarylmethanes. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201505926] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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30
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Lou Y, Cao P, Jia T, Zhang Y, Wang M, Liao J. Copper-Catalyzed Enantioselective 1,6-Boration ofpara-Quinone Methides and Efficient Transformation ofgem-Diarylmethine Boronates to Triarylmethanes. Angew Chem Int Ed Engl 2015; 54:12134-8. [DOI: 10.1002/anie.201505926] [Citation(s) in RCA: 229] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2015] [Revised: 07/27/2015] [Indexed: 12/14/2022]
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31
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Guo W, Wu B, Zhou X, Chen P, Wang X, Zhou YG, Liu Y, Li C. Formal Asymmetric Catalytic Thiolation with a Bifunctional Catalyst at a Water-Oil Interface: Synthesis of Benzyl Thiols. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201409894] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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32
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Guo W, Wu B, Zhou X, Chen P, Wang X, Zhou YG, Liu Y, Li C. Formal asymmetric catalytic thiolation with a bifunctional catalyst at a water-oil interface: synthesis of benzyl thiols. Angew Chem Int Ed Engl 2015; 54:4522-6. [PMID: 25694264 DOI: 10.1002/anie.201409894] [Citation(s) in RCA: 111] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Revised: 01/16/2015] [Indexed: 11/06/2022]
Abstract
The enantioselective conjugated addition of tritylthiol to in situ generated ortho-quinone methides (o-QMs) is catalyzed by an acid-base bifunctional squaramide organocatalyst. The transformation proceeds with high yield (up to 99 %) and stereoselectivity (up to 97:3 e.r.) using water as solvent under mild conditions. The catalyst system provides a new strategy for the synthesis of optically active benzyl mercaptans. Control experiments suggested that o-QMs are generated by the tertiary amine moiety of the squaramide organocatalyst and that the water-oil biphase is crucial for achieving high reactivity and stereoselectivity.
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Affiliation(s)
- Wengang Guo
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023 (China)
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33
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Chu W, Zhang L, Bao X, Zhao X, Zeng C, Du J, Zhang G, Wang F, Ma X, Fan C. Asymmetric Catalytic 1,6‐Conjugate Addition/Aromatization of
para
‐Quinone Methides: Enantioselective Introduction of Functionalized Diarylmethine Stereogenic Centers. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201303928] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Wen‐Dao Chu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000 (China)
| | - Le‐Fen Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000 (China)
| | - Xu Bao
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000 (China)
| | - Xian‐He Zhao
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000 (China)
| | - Chao Zeng
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000 (China)
| | - Ji‐Yuan Du
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000 (China)
| | - Guo‐Biao Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000 (China)
| | - Fang‐Xin Wang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000 (China)
| | - Xiao‐Yan Ma
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000 (China)
| | - Chun‐An Fan
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 Tianshui Nanlu, Lanzhou 730000 (China)
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Lu, Beijing 100191 (China)
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34
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Chu WD, Zhang LF, Bao X, Zhao XH, Zeng C, Du JY, Zhang GB, Wang FX, Ma XY, Fan CA. Asymmetric Catalytic 1,6-Conjugate Addition/Aromatization ofpara-Quinone Methides: Enantioselective Introduction of Functionalized Diarylmethine Stereogenic Centers. Angew Chem Int Ed Engl 2013; 52:9229-33. [DOI: 10.1002/anie.201303928] [Citation(s) in RCA: 256] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2013] [Revised: 06/14/2013] [Indexed: 11/06/2022]
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35
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Wellington KW, Gordon GER, Ndlovu LA, Steenkamp P. Laccase-Catalyzed CS and CC Coupling for a One-Pot Synthesis of 1,4-Naphthoquinone Sulfides and 1,4-Naphthoquinone Sulfide Dimers. ChemCatChem 2013. [DOI: 10.1002/cctc.201200606] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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36
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Richter D, Hampel N, Singer T, Ofial AR, Mayr H. Synthesis and Characterization of Novel Quinone Methides: Reference Electrophiles for the Construction of Nucleophilicity Scales. European J Org Chem 2009. [DOI: 10.1002/ejoc.200900299] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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37
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Rayne S, Eggers NJ. 4-ethylphenol and 4-ethylguaiacol in wines: estimating non-microbial sourced contributions and toxicological considerations. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2007; 42:887-897. [PMID: 17978957 DOI: 10.1080/03601230701623365] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Analyses of commercially available wines suggested non-Brettanomyces sources of 4-ethylphenol and 4-ethylguaiacol. Grapes, enological additions, exposure to plastics, and oak-barrel aging were potential inputs considered. Investigations of whole grape bunch samples from two major red wine Vitis vinifera cultivars (L. cv. Cabernet Franc and Pinot Noir), a commercial mannoprotein additive, and three commercial enological tannin additions indicated they are not likely significant sources of these compounds. Studies on 15 commercial oak barrelled red wines from six Vitis vinifera cultivars (L. cv. Cabernet Franc, Cabernet Sauvignon, Dunkelfelder, Merlot, Pinot Meunier, and Pinot Noir), and a review of volatile phenol extraction from toasted oak wood, suggested that oak-aging may produce concentrations of up to 50 microg L(-1) 4-ethylphenol and 4-ethylguaiacol. Thus, following potential Brettanomyces-sourced aroma impacts in wine using 4-ethylphenol and/or 4-ethylguaiacol concentrations as proxies should only be considered reliable at analyte levels>100 microg L(-1). A review of worldwide 4-ethylphenol and 4-ethylguaiacol concentrations in wine, consumption patterns, and available toxicological data also suggested that levels of 4-ethylphenol being observed in wines worldwide do not warrant concerns about acute or long-term effects. While little is known about the toxicology of 4-ethylguaiacol, it is unlikely that elevated concentrations will pose any health-related concerns.
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Affiliation(s)
- Sierra Rayne
- Pacific Agri-Food Research Centre, Agriculture and Agri-Food Canada, British Columbia.
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38
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Schaaf GJ, Nijmeijer SM, Maas RFM, Roestenberg P, de Groene EM, Fink-Gremmels J. The role of oxidative stress in the ochratoxin A-mediated toxicity in proximal tubular cells. BIOCHIMICA ET BIOPHYSICA ACTA 2002; 1588:149-58. [PMID: 12385779 DOI: 10.1016/s0925-4439(02)00159-x] [Citation(s) in RCA: 153] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Balkan endemic nephropathy (BEN), a disease characterized by progressive renal fibrosis in human patients, has been associated with exposure to ochratoxin A (OTA). This mycotoxin is a frequent contaminant of human and animal food products, and is toxic to all animal species tested. OTA predominantly affects the kidney and is known to accumulate in the proximal tubule (PT). The induction of oxidative stress is implicated in the toxicity of this mycotoxin. In the present study, primary rat PT cells and LLC-PK(1) cells, which express characteristics of the PT, were used to investigate the OTA-mediated oxidative stress response. OTA exposure of these cells resulted in a concentration-dependent elevation of reactive oxygen species (ROS) levels, depletion of cellular glutathione (GSH) levels and an increase in the formation of 8-oxoguanine. The OTA-induced ROS response was significantly reduced following treatment with alpha-tocopherol (TOCO). However, this chain-braking anti-oxidant did not reduce the cytotoxicity of OTA and was unable to prevent the depletion of total GSH levels in OTA-exposed cells. In contrast, pre-incubation of the cell with N-acetyl-L-cysteine (NAC) completely prevented the OTA-induced increase in ROS levels as well as the formation of 8-oxoguanine and completely protected against the cytotoxicity of OTA. In addition, NAC treatment also limited the GSH depletion in OTA-exposed PT- and LLC-PK(1) cells. From these data, we conclude that oxidative stress contributes to the tubular toxicity of OTA. Subsequently, cellular GSH levels play a pivotal role in limiting the short-term toxicity of this mycotoxin in renal tubular cells.
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Affiliation(s)
- G J Schaaf
- Department of Veterinary Pharmacology, Pharmacy and Toxicology (VFFT) Faculty of Veterinary Medicine, Utrecht University, P.O. Box 80152, NL 3508 TD Utrecht, The Netherlands
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40
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Rompel A, Fischer H, Meiwes D, Büldt-Karentzopoulos K, Magrini A, Eicken C, Gerdemann C, Krebs B. Substrate specificity of catechol oxidase from Lycopus europaeus and characterization of the bioproducts of enzymic caffeic acid oxidation. FEBS Lett 1999; 445:103-10. [PMID: 10069382 DOI: 10.1016/s0014-5793(99)00106-4] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The substrate specificity of catechol oxidase from Lycopus europaeus towards phenols is examined. The enzyme catalyzes the oxidation of o-diphenols to o-quinones without hydroxylating monophenols, the additional activity of tyrosinase. Substrates containing a -COOH group are inhibitors for catechol oxidase. The products of enzymic oxidation of caffeic acid were analyzed and isolated by HPLC with diode array detection. The neolignans of the 2,3-dihydro-1,4-benzodioxin type (3, 6-8), 6,7-dihydroxy-1-(3,4-dihydroxyphenyl)-2,3-dicarboxy-1,2-dihydro naphthaline (1) 6,7-dihydroxy-1-(3,4-dihydroxyphenyl)-3-carboxynaphthaline (5) and 2,6-bis-(3',4'-dihydroxyphenyl)-1-carboxy-3-oxacyclo-(3,0)-pent an-2-on-1-ene (4) were formed. A reaction mechanism for the formation of (1, 4 and 5) is discussed.
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Affiliation(s)
- A Rompel
- Anorganisch-Chemisches der Universität Münster, Germany
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41
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Reindl M, Seidel A, Frank H, Platt KL. Detection of Reactive Quinones in the Metabolism of Polycyclic Aromatic Hydrocarbons by the Formation of their Glutathione Conjugates. Polycycl Aromat Compd 1996. [DOI: 10.1080/10406639608034682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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42
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43
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Petrikevich DK, Timoshchuk VA, Shadyro OI, Andreeva OT, Votyakov VI, Zhelobkovich VE. Synthesis and antiviral activity of some 3,5-di-tert-butylpyrocathechols. Pharm Chem J 1995. [DOI: 10.1007/bf02334494] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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44
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Peter MG, Merz A. Stereoselective benzylic deprotonation in the enzymatic rearrangement of N-acetyldopamine derived o-quinone to the p-quinone methide. ACTA ACUST UNITED AC 1995. [DOI: 10.1016/0957-4166(95)00083-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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45
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46
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Peter MG, Andersen SO, Hartmann R, Miessner M, Roepstorff P. Catecholamine-protein conjugates: isolation of 4-phenylphenoxazin-2-ones from oxidative coupling of N-acetyldopamine with aliphatic amino acids. Tetrahedron 1992. [DOI: 10.1016/s0040-4020(01)81991-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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47
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Miessner M, Crescenzi O, Napolitano A, Prota G, Andersen SO, Peter MG. Biphenyltetrols and Dibenzofuranones from Oxidative Coupling of Resorcinols with 4-Alkylpyrocatechols: New Ciues to the Mechanism of Insect Cuticle Sclerotization. Helv Chim Acta 1991. [DOI: 10.1002/hlca.19910740607] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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48
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Crescenzi O, Napolitano A, Prota G, Peter MG. Oxidative coupling of dopa with resorcinol and phloroglucinol: Isolation of adducts with an unusual tetrahydromethanobenzofuro[2,3-d]azocine skeleton. Tetrahedron 1991. [DOI: 10.1016/s0040-4020(01)86556-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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