1
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Young MS, LaPointe AM, MacMillan SN, Coates GW. Highly Enantioselective Polymerization of β-Butyrolactone by a Bimetallic Magnesium Catalyst: An Interdependent Relationship Between Favored and Unfavored Enantiomers. J Am Chem Soc 2024; 146:18032-18040. [PMID: 38874569 DOI: 10.1021/jacs.4c04716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2024]
Abstract
Herein, we report that (S,S)-prophenolMg2(μ-OnBu)(THF)2 ((S,S)-1, prophenol = (S,S)-2,6-bis[2-(hydroxydiphenylmethyl)pyrrolidin-1-ylmethyl]-4-methylphenol) is a highly enantioselective (kR/kS = 140) precatalyst for ring-opening polymerization of rac-β-butyrolactone (β-BL) to isotactic poly(3-hydroxybutyrate) (i-PHB), a high performance, biodegradable polyester. Precatalyst (S,S)-1 polymerizes (R)-β-BL with an inversion of stereochemistry to (S)-PHB with a m% (percentage of adjacent linkages with a meso configuration) of 98% at 41% conversion and Tm of 165 °C under a variety of conditions. Complex (S,S)-1 demonstrates unique polymerization kinetics, as it does not polymerize the preferred enantiomer, (R)-β-BL, alone. Mechanistic studies revealed that (S)-β-BL is needed to convert (S,S)-1 into the active enantioselective polymerization catalyst. To the best of our knowledge, (S,S)-1 produces i-PHB with the highest degree of isotacticity observed from a polymerization of rac-β-BL. This study informs the design and understanding of future enantioselective and earth-abundant metal catalysts for ring-opening polymerization of β-lactones.
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Affiliation(s)
- Morgan S Young
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, United States
| | - Anne M LaPointe
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, United States
| | - Samantha N MacMillan
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, United States
| | - Geoffrey W Coates
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, United States
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2
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Liu Y, Lu XB. Current Challenges and Perspectives in CO 2-Based Polymers. Macromolecules 2023. [DOI: 10.1021/acs.macromol.2c02483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
Affiliation(s)
- Ye Liu
- State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials, Dalian University of Technology, Dalian 116024, China
| | - Xiao-Bing Lu
- State Key Laboratory of Fine Chemicals, Frontiers Science Center for Smart Materials, Dalian University of Technology, Dalian 116024, China
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3
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Garces LJ, Galeano JA, Garces HF, Suib SL, Hincapie B. Oxidation of Cyclopentene with Manganese Oxides Octahedral Molecular Sieves with Layer and Tunnel Structures. ChemistrySelect 2022. [DOI: 10.1002/slct.202104110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Luis J. Garces
- Catálisis Industrial Instituto de Química Facultad de Ciencias Exactas y Naturales Universidad de Antioquia UdeA Calle 70 No. 52–21 050010 Medellín Colombia
| | - John Alexander Galeano
- Catálisis Industrial Instituto de Química Facultad de Ciencias Exactas y Naturales Universidad de Antioquia UdeA Calle 70 No. 52–21 050010 Medellín Colombia
| | | | - Steven L. Suib
- Department of Chemistry U-3060 University of Connecticut Storrs, CT. 06269 USA
| | - Beatriz Hincapie
- Catálisis Industrial Instituto de Química Facultad de Ciencias Exactas y Naturales Universidad de Antioquia UdeA Calle 70 No. 52–21 050010 Medellín Colombia
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4
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Zhou P, Yi Y, Hua YZ, Jia SK, Wang MC. Dinuclear Zinc Catalyzed Enantioselective Dearomatization [3+2] Annulation of 2-Nitrobenzofurans and 2-Nitrobenzothiophenes. Chemistry 2021; 28:e202103688. [PMID: 34713514 DOI: 10.1002/chem.202103688] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Indexed: 12/18/2022]
Abstract
The application of dinuclear zinc catalysts in a dearomatization reaction has been developed. Catalytic asymmetric dearomatization [3+2] annulations of 2-nitrobenzofurans or 2-nitrobenzothiophenes with CF3 -containing N-unprotected isatin-derived azomethine ylides catalyzed by dinuclear zinc catalysts are realized with excellent diastereomer ratios (dr) of >20 : 1 and enantiomeric excess (ee) of up to 99 %. This protocol provides a practical, straightforward access to structurally diverse pyrrolidinyl spirooxindoles containing a 2,3-fused-dihydrobenzofuran (or dihydrobenzothiphene) moiety, and four contiguous stereocenters. Reactions can be performed on a gram scale. The absolute configuration of products is confirmed by X-ray single crystal structure analysis, and a possible mechanism is proposed.
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Affiliation(s)
- Peng Zhou
- College of Chemistry and Institute of Green Catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou City, Henan province 450000, P. R. China
| | - Yang Yi
- College of Chemistry and Institute of Green Catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou City, Henan province 450000, P. R. China
| | - Yuan-Zhao Hua
- College of Chemistry and Institute of Green Catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou City, Henan province 450000, P. R. China
| | - Shi-Kun Jia
- College of Chemistry and Institute of Green Catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou City, Henan province 450000, P. R. China
| | - Min-Can Wang
- College of Chemistry and Institute of Green Catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou City, Henan province 450000, P. R. China
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5
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6
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Hu WB, Song X, Wang MC. A new asymmetric activation strategy for hydrazones as acyl anion equivalents in the bimetallic catalyzed carbonyl-ene reaction. Org Biomol Chem 2021; 19:2055-2062. [PMID: 33599668 DOI: 10.1039/d1ob00017a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new asymmetric activation strategy for hydrazones as acyl anion equivalents is developed in the bimetallic catalyzed carbonyl-ene reaction of isatins and hydrazones. Under mild conditions, optically active functionalized 3-hydroxy-2-oxindoles were furnished in up to 98% yield with up to 97% enantioselectivity. In this process, formaldehyde tert-butylhydrazone which is seldom employed in asymmetric carbonyl-ene reactions accelerated by a metallic catalyst can be activated well by a Brønsted base. A possible catalytic cycle is proposed.
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Affiliation(s)
- Wen-Bo Hu
- The College of Chemistry and Molecular Engineering, Zhengzhou University, 75 Daxue Road, Zhengzhou, Henan 450052, P. R. China.
| | - Xixi Song
- The College of Chemistry and Molecular Engineering, Zhengzhou University, 75 Daxue Road, Zhengzhou, Henan 450052, P. R. China.
| | - Min-Can Wang
- The College of Chemistry and Molecular Engineering, Zhengzhou University, 75 Daxue Road, Zhengzhou, Henan 450052, P. R. China.
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7
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Geng Y, Hua Y, Jia S, Wang M. Direct Asymmetric α‐Selective Mannich Reaction of β,γ‐Unsaturated Ketones with Cyclic α‐Imino Ester: Divergent Synthesis of Cyclocanaline and Tetrahydro Pyridazinone Derivatives. Chemistry 2021; 27:5130-5135. [DOI: 10.1002/chem.202100284] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Indexed: 12/16/2022]
Affiliation(s)
- Yu‐Huan Geng
- College of Chemistry and Institute of Green Catalysis Zhengzhou University No. 100, Science Road Zhengzhou City Henan province 450000 P. R. China
| | - Yuan‐Zhao Hua
- College of Chemistry and Institute of Green Catalysis Zhengzhou University No. 100, Science Road Zhengzhou City Henan province 450000 P. R. China
| | - Shi‐Kun Jia
- College of Chemistry and Institute of Green Catalysis Zhengzhou University No. 100, Science Road Zhengzhou City Henan province 450000 P. R. China
| | - Min‐Can Wang
- College of Chemistry and Institute of Green Catalysis Zhengzhou University No. 100, Science Road Zhengzhou City Henan province 450000 P. R. China
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8
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9
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Sun Y, Lu C, Zhao B, Xue M. Enantioselective Hydroboration of Ketones Catalyzed by Rare-Earth Metal Complexes Containing Trost Ligands. J Org Chem 2020; 85:10504-10513. [PMID: 32589850 DOI: 10.1021/acs.joc.0c00877] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Four chiral dinuclear rare-earth metal complexes [REL1]2 (RE = Y(1), Eu(2), Nd(3), La (4)) stabilized by Trost proligand H3L1 (H3L1 = (S,S)-2,6-bis[2-(hydroxydiphenylmethyl)pyrrolidin-1-ylmethyl]-4-methylphenol) were first prepared, and all were characterized by X-ray diffraction. Complex 4 was employed as the catalyst for enantioselective hydroboration reaction of substituted ketones, and the corresponding secondary alcohols with excellent yields and high ee values were obtained using reductant HBpin. The same result was also achieved using the combination of lanthanium amides La[N(SiMe3)2]3 with Trost proligand H3L1 in a 1:1 molar ratio. The experimental findings and DFT calculation revealed the possible mechanism of the enantioselective hydroboration reaction and defined the origin of the enantioselectivity in the current system.
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10
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11
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Yang XC, Xu M, Wang JB, Liu MM, Mathey F, Hua YZ, Wang MC. Enantioselective synthesis of indanone spiro-isochromanone derivatives via a dinuclear zinc-catalyzed Michael/transesterification tandem reaction. Org Biomol Chem 2020; 18:3917-3926. [PMID: 32400845 DOI: 10.1039/d0ob00541j] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An enantioselective Michael/transesterification tandem reaction of α-hydroxy indanones with ortho-ester chalcones was realized using dinuclear zinc catalysts. A series of enantiomerically pure spiro[indanone-2,3'-isochromane-1-one] derivatives were obtained in good yields with excellent stereoselectivities (up to >20 : 1 dr, up to >99% ee). This protocol could be conducted on a gram scale without affecting its stereoselectivities. In addition, the absolute stereochemistry of the products was determined by X-ray crystallographic analysis of 3ac, and a positive nonlinear effect was observed. Finally, a possible catalytic cycle was proposed to explain the origin of the enantioselectivity.
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Affiliation(s)
- Xiao-Chao Yang
- College of Chemistry and Institute of Green catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou, Henan Province 450000, P. R. China.
| | - Meng Xu
- College of Chemistry and Institute of Green catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou, Henan Province 450000, P. R. China.
| | - Jin-Bao Wang
- College of Chemistry and Institute of Green catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou, Henan Province 450000, P. R. China.
| | - Meng-Meng Liu
- College of Chemistry and Institute of Green catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou, Henan Province 450000, P. R. China.
| | - François Mathey
- College of Chemistry and Institute of Green catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou, Henan Province 450000, P. R. China.
| | - Yuan-Zhao Hua
- College of Chemistry and Institute of Green catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou, Henan Province 450000, P. R. China.
| | - Min-Can Wang
- College of Chemistry and Institute of Green catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou, Henan Province 450000, P. R. China.
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12
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Yi Y, Hua YZ, Lu HJ, Liu LT, Wang MC. Brønsted Base and Lewis Acid Cooperatively Catalyzed Asymmetric exo'-Selective [3 + 2] Cycloaddition of Trifluoromethylated Azomethine Ylides and Methyleneindolinones. Org Lett 2020; 22:2527-2531. [PMID: 32202432 DOI: 10.1021/acs.orglett.0c00283] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A Brønsted base and Lewis acid cooperatively catalyzed 1,3-dipolar cycloaddition is reported through chiral dinuclear zinc catalysts. An asymmetric exo'-selective [3 + 2] cycloaddition of CF3-containing N-unprotected isatin-derived azomethine ylides is realized. In the presence of 10 mol % of catalyst, azomethine ylides react efficiently with methyleneindolinones, giving a series of trifluoromethyl-substituted 2,3-pyrrolidinyl dispirooxindoles with highly enantio- (up to 99% ee) and exo'-selectivity (>20:1 dr). Up to four contiguous stereogenic centers, including two adjacent spiro quaternary stereocenters, are constructed in one step.
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Affiliation(s)
- Yang Yi
- College of Chemistry and Institute of Green Catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou City, Henan Province 450000, P. R. China
| | - Yuan-Zhao Hua
- College of Chemistry and Institute of Green Catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou City, Henan Province 450000, P. R. China
| | - Hui-Jie Lu
- College of Chemistry and Institute of Green Catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou City, Henan Province 450000, P. R. China
| | - Lan-Tao Liu
- School of Chemistry & Chemical Engineering, Shangqiu Normal University, Shangqiu City, Henan Province 476000, P. R. China
| | - Min-Can Wang
- College of Chemistry and Institute of Green Catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou City, Henan Province 450000, P. R. China
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13
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Cozzolino M, Melchionno F, Santulli F, Mazzeo M, Lamberti M. Aldimine‐Thioether‐Phenolate Based Mono‐ and Bimetallic Zinc Complexes as Catalysts for the Reaction of CO
2
with Cyclohexene Oxide. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000119] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mariachiara Cozzolino
- Department of Chemistry and Biology “Adolfo Zambell” University of Salerno Via Giovanni Paolo II, 132 84084 Fisciano SA Italy
| | - Flavia Melchionno
- Department of Chemistry and Biology “Adolfo Zambell” University of Salerno Via Giovanni Paolo II, 132 84084 Fisciano SA Italy
| | - Federica Santulli
- Department of Chemistry and Biology “Adolfo Zambell” University of Salerno Via Giovanni Paolo II, 132 84084 Fisciano SA Italy
| | - Mina Mazzeo
- Department of Chemistry and Biology “Adolfo Zambell” University of Salerno Via Giovanni Paolo II, 132 84084 Fisciano SA Italy
| | - Marina Lamberti
- Department of Chemistry and Biology “Adolfo Zambell” University of Salerno Via Giovanni Paolo II, 132 84084 Fisciano SA Italy
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14
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Guo YJ, Guo X, Kong DZ, Lu HJ, Liu LT, Hua YZ, Wang MC. Catalytic Asymmetric Synthesis of Tetrahydrofuran Spirooxindoles via a Dinuclear Zinc Catalyst. J Org Chem 2020; 85:4195-4206. [DOI: 10.1021/acs.joc.9b03378] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Ya-Jun Guo
- College of Chemistry and Institute of Green Catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou, Henan 450000, P. R. China
| | - Xin Guo
- College of Chemistry and Institute of Green Catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou, Henan 450000, P. R. China
| | - De-Zhi Kong
- College of Chemistry and Institute of Green Catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou, Henan 450000, P. R. China
| | - Hui-Jie Lu
- College of Chemistry and Institute of Green Catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou, Henan 450000, P. R. China
| | - Lan-Tao Liu
- School of Chemistry & Chemical Engineering, Shangqiu Normal University, Shangqiu, Henan 476000, P. R. China
| | - Yuan-Zhao Hua
- College of Chemistry and Institute of Green Catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou, Henan 450000, P. R. China
| | - Min-Can Wang
- College of Chemistry and Institute of Green Catalysis, Zhengzhou University, No. 100, Science Road, Zhengzhou, Henan 450000, P. R. China
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15
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Shi Y, Pan BW, Zhou Y, Zhou J, Liu YL, Zhou F. Catalytic enantioselective synthesis using carbon dioxide as a C1 synthon. Org Biomol Chem 2020; 18:8597-8619. [DOI: 10.1039/d0ob01905d] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
This review summarizes the advances in catalytic enantioselective reactions using CO2 as a C1 synthon, introduces strategies and discusses advantages and limitations, highlights the application, and outlines the synthetic opportunities.
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Affiliation(s)
- Yang Shi
- College of Pharmacy
- Guizhou University of Traditional Chinese Medicine
- Guiyang
- 550025
- P. R. China
| | - Bo-Wen Pan
- College of Pharmacy
- Guizhou University of Traditional Chinese Medicine
- Guiyang
- 550025
- P. R. China
| | - Ying Zhou
- College of Pharmacy
- Guizhou University of Traditional Chinese Medicine
- Guiyang
- 550025
- P. R. China
| | - Jian Zhou
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- East China Normal University
- Shanghai
- 200062
| | - Yun-Lin Liu
- School of Chemistry and Chemical Engineering
- Guangzhou University
- Guangzhou
- 510006
- P. R. China
| | - Feng Zhou
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development
- East China Normal University
- Shanghai
- 200062
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16
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Liu MM, Yang XC, Hua YZ, Chang JB, Wang MC. Dinuclear Zinc-Catalyzed Asymmetric Tandem Reaction of α-Hydroxy-1-indanone: Access to Spiro[1-indanone-5,2′-γ-butyrolactones]. Org Lett 2019; 21:7089-7093. [DOI: 10.1021/acs.orglett.9b02658] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Meng-Meng Liu
- College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou, Henan 450001, People’s Republic of China
| | - Xiao-Chao Yang
- College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou, Henan 450001, People’s Republic of China
| | - Yuan-Zhao Hua
- College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou, Henan 450001, People’s Republic of China
| | - Jun-Biao Chang
- College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou, Henan 450001, People’s Republic of China
| | - Min-Can Wang
- College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou, Henan 450001, People’s Republic of China
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17
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Lalrempuia R, Underhaug J, Törnroos KW, Le Roux E. Anionic hafnium species: an active catalytic intermediate for the coupling of epoxides with CO 2? Chem Commun (Camb) 2019; 55:7227-7230. [PMID: 31165803 DOI: 10.1039/c9cc02695a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of hafnium complexes were structurally identified showing high activity (up to 500 h-1) in the selective alternated copolymerization of epoxides with CO2 under low pressure.
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Affiliation(s)
- Ralte Lalrempuia
- Department of Chemistry, University of Bergen, Allégaten 41, N-5007, Bergen, Norway.
| | - Jarl Underhaug
- Department of Chemistry, University of Bergen, Allégaten 41, N-5007, Bergen, Norway.
| | - Karl W Törnroos
- Department of Chemistry, University of Bergen, Allégaten 41, N-5007, Bergen, Norway.
| | - Erwan Le Roux
- Department of Chemistry, University of Bergen, Allégaten 41, N-5007, Bergen, Norway.
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18
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Yang XC, Liu MM, Mathey F, Yang H, Hua YZ, Wang MC. Access to Chiral 2,5-Pyrrolidinyl Dispirooxindoles via Dinuclear Zinc-Catalyzed Asymmetric Cascade Reactions. J Org Chem 2019; 84:7762-7775. [PMID: 31145619 DOI: 10.1021/acs.joc.9b00645] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Xiao-Chao Yang
- College of Chemistry and Molecular Engineering, School of Pharmaceutical Sciences, Zhengzhou University, 75 Daxue Street, Zhengzhou, Henan 450052, P. R. China
| | - Meng-Meng Liu
- College of Chemistry and Molecular Engineering, School of Pharmaceutical Sciences, Zhengzhou University, 75 Daxue Street, Zhengzhou, Henan 450052, P. R. China
| | - François Mathey
- College of Chemistry and Molecular Engineering, School of Pharmaceutical Sciences, Zhengzhou University, 75 Daxue Street, Zhengzhou, Henan 450052, P. R. China
| | - Hua Yang
- College of Chemistry and Molecular Engineering, School of Pharmaceutical Sciences, Zhengzhou University, 75 Daxue Street, Zhengzhou, Henan 450052, P. R. China
| | - Yuan-Zhao Hua
- College of Chemistry and Molecular Engineering, School of Pharmaceutical Sciences, Zhengzhou University, 75 Daxue Street, Zhengzhou, Henan 450052, P. R. China
| | - Min-Can Wang
- College of Chemistry and Molecular Engineering, School of Pharmaceutical Sciences, Zhengzhou University, 75 Daxue Street, Zhengzhou, Henan 450052, P. R. China
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19
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Trott G, Garden JA, Williams CK. Heterodinuclear zinc and magnesium catalysts for epoxide/CO 2 ring opening copolymerizations. Chem Sci 2019; 10:4618-4627. [PMID: 31123572 PMCID: PMC6492632 DOI: 10.1039/c9sc00385a] [Citation(s) in RCA: 84] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Accepted: 03/06/2019] [Indexed: 12/21/2022] Open
Abstract
The ring-opening copolymerization of carbon dioxide and epoxides is a useful means to make aliphatic polycarbonates and to add-value to CO2. Recently, the first heterodinuclear Zn(ii)/Mg(ii) catalyst showed greater activity than either homodinuclear analogue (J. Am. Chem. Soc. 2015, 137, 15078-15081). Building from this preliminary finding, here, eight new Zn(ii)/Mg(ii) heterodinuclear catalysts featuring carboxylate co-ligands are prepared and characterized. The best catalysts show very high activities for copolymerization using cyclohexene oxide (TOF = 8880 h-1, 20 bar CO2, 120 °C, 0.01 mol% catalyst loading) or cyclopentene oxide. All the catalysts are highly active in the low pressure regime and specifically at 1 bar pressure CO2. The polymerization kinetics are analysed using in situ spectroscopy and aliquot techniques: the rate law is overall second order with a first order dependence in both catalyst and epoxide concentrations and a zero order in carbon dioxide pressure. The pseudo first order rate coefficient values are compared for the catalyst series and differences are primarily attributed to effects on initiation rates. The data are consistent with a chain shuttling mechanistic hypothesis with heterodinuclear complexes showing particular rate enhancements by optimizing distinct roles in the catalytic cycles. The mechanistic hypothesis should underpin future heterodinuclear catalyst design for use both in other (co)polymerization and carbon dioxide utilization reactions.
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Affiliation(s)
- Gemma Trott
- Chemistry Research Laboratory , University of Oxford , Mansfield Road , Oxford , OX1 3TA , UK .
| | | | - Charlotte K Williams
- Chemistry Research Laboratory , University of Oxford , Mansfield Road , Oxford , OX1 3TA , UK .
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20
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Tao BK, Yang H, Hua YZ, Wang MC. Dinuclear zinc synergistic catalytic asymmetric phospha-Michael/Michael cascade reaction: synthesis of 1,2,3-trisubstituted indanes bearing phosphoryl groups. Org Biomol Chem 2019; 17:4301-4310. [PMID: 30969299 DOI: 10.1039/c9ob00544g] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A new dinuclear zinc synergistic catalytic asymmetric phospha-Michael/Michael cascade reaction of o-dienones and dialkyl phosphates is reported. This method has been proven to be general and efficient for the formation of a range of chiral 1,2,3-trisubstituted indane compounds containing phosphorus groups in good yields (up to 92%) with excellent stereoselectivities (up to >99% ee and up to >99 : 1 dr). The relative configuration of the product was identified as having a trans,trans substitution pattern via two-dimensional (2D) nuclear Overhauser effect spectroscopy 1H-1H NMR experiments. A possible mechanism was proposed.
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Affiliation(s)
- Bing-Kai Tao
- College of Chemistry and Molecular Engineering, School of Pharmaceutical Sciences, Zhengzhou University, No. 100, Science Road, Zhengzhou City, Henan province 450000, P. R. China.
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21
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Liu MM, Yang XC, Hua YZ, Chang JB, Wang MC. Synthesis of Chiral Bispirotetrahydrofuran Oxindoles by Cooperative Bimetallic-Catalyzed Asymmetric Cascade Reaction. Org Lett 2019; 21:2111-2115. [DOI: 10.1021/acs.orglett.9b00386] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Meng-Meng Liu
- College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou, Henan 450001, People’s Republic of China
| | - Xiao-Chao Yang
- College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou, Henan 450001, People’s Republic of China
| | - Yuan-Zhao Hua
- College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou, Henan 450001, People’s Republic of China
| | - Jun-Biao Chang
- College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou, Henan 450001, People’s Republic of China
| | - Min-Can Wang
- College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou, Henan 450001, People’s Republic of China
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22
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Liu S, Gao WC, Miao YH, Wang MC. Dinuclear Zinc-AzePhenol Catalyzed Asymmetric Aza-Henry Reaction of N-Boc Imines and Nitroalkanes under Ambient Conditions. J Org Chem 2019; 84:2652-2659. [PMID: 30707574 DOI: 10.1021/acs.joc.8b02943] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The asymmetric aza-Henry reaction of N-Boc imines and nitroalkanes was realized in the presence of 10 mol % dinuclear zinc-AzePhenol catalysts under ambient conditions. A variety of nitroamines were obtained in good yields (up to 97%) with excellent enantioselectivities (up to 99% ee) and high diasteroselectivity (up to 14:1 dr). Our protocol combined the operational simplicity and mild reaction conditions, thus making the process amenable for technical applications.
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Affiliation(s)
- Shanshan Liu
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering , Shaanxi University of Science and Technology , 6 Xuefu Road , Weiyang District, Xi'an , Shaanxi 710021 , P. R. China
| | - Wen-Chao Gao
- College of Chemistry and Pharmaceutical Engineering , Nanyang Normal University , 1638 Wolong Road , Nanyang , Henan 473061 , P. R. China.,The College of Chemistry and Molecular Engineering , Zhengzhou University , No. 75 Daxue Road , Zhengzhou , Henan 450052 , P. R. China
| | - Yu-Hang Miao
- The College of Chemistry and Molecular Engineering , Zhengzhou University , No. 75 Daxue Road , Zhengzhou , Henan 450052 , P. R. China
| | - Min-Can Wang
- The College of Chemistry and Molecular Engineering , Zhengzhou University , No. 75 Daxue Road , Zhengzhou , Henan 450052 , P. R. China
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23
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Miao YH, Hua YZ, Wang MC. Dinuclear zinc cooperative catalytic three-component reactions for highly enantioselective synthesis of 3,3′-dihydrofuran spirooxindoles. Org Biomol Chem 2019; 17:7172-7181. [DOI: 10.1039/c9ob01233h] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new dinuclear zinc cooperative catalytic enantioselective three-component reaction via a domino Knoevenagel/Michael/cyclization sequence has been developed.
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Affiliation(s)
- Yu-Hang Miao
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- People's Republic of China
| | - Yuan-Zhao Hua
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- People's Republic of China
| | - Min-Can Wang
- College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- People's Republic of China
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24
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Enantioselective phospha-Michael reaction of diethyl phosphonate with exocyclic α,β-unsaturated benzocyclic ketones catalyzed by a dinuclear zinc−AzePhenol catalyst. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.03.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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25
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Zhang ZF, Yang XC, Lu HJ, Wang MC. Enantioselective Direct Synthesis of syn
- and anti
-α,β-Dihydroxy γ-Keto Esters Using a Dinuclear Zinc-AzePhenol Complex. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701695] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Zhao-Fei Zhang
- College of Chemistry and Molecular Engineering; Zhengzhou University; No. 75, Daxue Street 450052 Zhengzhou City Henan Province P. R. China
| | - Xiao-Chao Yang
- College of Chemistry and Molecular Engineering; Zhengzhou University; No. 75, Daxue Street 450052 Zhengzhou City Henan Province P. R. China
| | - Hui-Jie Lu
- College of Chemistry and Molecular Engineering; Zhengzhou University; No. 75, Daxue Street 450052 Zhengzhou City Henan Province P. R. China
| | - Min-Can Wang
- College of Chemistry and Molecular Engineering; Zhengzhou University; No. 75, Daxue Street 450052 Zhengzhou City Henan Province P. R. China
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26
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Hua YZ, Chen JW, Yang H, Wang MC. Asymmetric Friedel–Crafts Alkylation of Indoles with Trifluoromethyl Pyruvate Catalyzed by a Dinuclear Zinc Catalyst. J Org Chem 2018; 83:1160-1166. [DOI: 10.1021/acs.joc.7b02599] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Yuan-Zhao Hua
- College of Chemistry and Molecular
Engineering, School of Pharmaceutical Sciences, Zhengzhou University, No. 100, Science Road, Zhengzhou, Henan 450000, P. R. China
| | - Jun-Wei Chen
- College of Chemistry and Molecular
Engineering, School of Pharmaceutical Sciences, Zhengzhou University, No. 100, Science Road, Zhengzhou, Henan 450000, P. R. China
| | - Hua Yang
- College of Chemistry and Molecular
Engineering, School of Pharmaceutical Sciences, Zhengzhou University, No. 100, Science Road, Zhengzhou, Henan 450000, P. R. China
| | - Min-Can Wang
- College of Chemistry and Molecular
Engineering, School of Pharmaceutical Sciences, Zhengzhou University, No. 100, Science Road, Zhengzhou, Henan 450000, P. R. China
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27
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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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28
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Vaitla J, Guttormsen Y, Mannisto JK, Nova A, Repo T, Bayer A, Hopmann KH. Enantioselective Incorporation of CO2: Status and Potential. ACS Catal 2017. [DOI: 10.1021/acscatal.7b02306] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Janakiram Vaitla
- Hylleraas
Centre for Quantum Molecular Sciences, UiT-The Arctic University of Norway, N-9037 Tromsø, Norway
- Department
of Chemistry, UiT-The Arctic University of Norway, N-9037 Tromsø, Norway
| | - Yngve Guttormsen
- Hylleraas
Centre for Quantum Molecular Sciences, UiT-The Arctic University of Norway, N-9037 Tromsø, Norway
- Department
of Chemistry, UiT-The Arctic University of Norway, N-9037 Tromsø, Norway
| | - Jere K. Mannisto
- Department
of Chemistry, University of Helsinki, P.O. Box 55, 00014 Helsinki, Finland
| | - Ainara Nova
- Hylleraas
Centre for Quantum Molecular Sciences, Department of Chemistry, University of Oslo, P.O.
Box 1033, Blindern, N-0315 Oslo, Norway
| | - Timo Repo
- Department
of Chemistry, University of Helsinki, P.O. Box 55, 00014 Helsinki, Finland
| | - Annette Bayer
- Department
of Chemistry, UiT-The Arctic University of Norway, N-9037 Tromsø, Norway
| | - Kathrin H. Hopmann
- Hylleraas
Centre for Quantum Molecular Sciences, UiT-The Arctic University of Norway, N-9037 Tromsø, Norway
- Department
of Chemistry, UiT-The Arctic University of Norway, N-9037 Tromsø, Norway
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29
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Huang LS, Tsai CY, Chuang HJ, Ko BT. Copolymerization of Carbon Dioxide with Epoxides Catalyzed by Structurally Well-Characterized Dinickel Bis(benzotriazole iminophenolate) Complexes: Influence of Carboxylate Ligands on the Catalytic Performance. Inorg Chem 2017; 56:6141-6151. [DOI: 10.1021/acs.inorgchem.7b00090] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Li-Shin Huang
- Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan
| | - Chen-Yen Tsai
- Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan
| | - Hui-Ju Chuang
- Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan
| | - Bao-Tsan Ko
- Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan
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30
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González-Fabra J, Castro-Gómez F, Kleij AW, Bo C. Mechanistic Insights into the Carbon Dioxide/Cyclohexene Oxide Copolymerization Reaction: Is One Metal Center Enough? CHEMSUSCHEM 2017; 10:1233-1240. [PMID: 27957819 DOI: 10.1002/cssc.201601520] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 12/12/2016] [Indexed: 06/06/2023]
Abstract
A detailed study on the mechanism for the alternating copolymerization of cyclohexene oxide (CHO) and CO2 mediated by an [Al{amino-tri(phenolate)}]/NBu4 I binary catalyst system was performed by using DFT-based methods. Four potential mechanisms (one monometallic and three bimetallic) were considered for the first propagation cycle of the CHO/CO2 copolymerization. The obtained Gibbs free energies provided a rationale for the relative high activity of a non-covalent dimeric structure formed in situ and thus for the feasibility of a bimetallic mechanism to obtain polycarbonates quantitatively. Gibbs free energies also indicated that the alternating copolymerization was favored over the cyclic carbonate formation.
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Affiliation(s)
- Joan González-Fabra
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
| | - Fernando Castro-Gómez
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
| | - Arjan W Kleij
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
- Catalan Institute of Research and Advanced Studies (ICREA), Pg. Lluís Companys 23, 08010, Barcelona, Spain
| | - Carles Bo
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcellí Domingo s/n, 43007, Tarragona, Spain
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31
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Liu S, Li GW, Yang XC, Zhang DY, Wang MC. Dinuclear zinc complex catalyzed asymmetric methylation and alkynylation of aromatic aldehydes. Org Biomol Chem 2017; 15:7147-7156. [DOI: 10.1039/c7ob01717k] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
A general AzePhenol dinuclear zinc catalytic system has been successfully developed and introduced into the asymmetric addition of dimethylzinc and alkynylzinc to aromatic aldehydes.
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Affiliation(s)
- Shanshan Liu
- College of Chemistry and Chemical Engineering
- Shaanxi University of Science and Technology
- Xi'an
- P. R. China
| | - Gao-Wei Li
- The College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Xiao-Chao Yang
- The College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - De-Yang Zhang
- The College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Min-Can Wang
- The College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
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32
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Liu S, Shao N, Li FZ, Yang XC, Wang MC. Azetidine-derived dinuclear zinc catalyzed asymmetric phospha-Michael addition of dialkyl phosphite to α,β-unsaturated carbonyl compounds. Org Biomol Chem 2017; 15:9465-9474. [DOI: 10.1039/c7ob02222k] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The asymmetric phospha-Michael addition of dialkyl phosphite to α,β-unsaturated carbonyl compounds by using an azetidine-derived dinuclear zinc catalyst was described.
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Affiliation(s)
- Shanshan Liu
- College of Chemistry and Chemical Engineering
- Shaanxi University of Science and Technology
- Xi'an
- P. R. China
| | - Na Shao
- The College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Feng-Zhen Li
- The College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Xiao-Chao Yang
- The College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Min-Can Wang
- The College of Chemistry and Molecular Engineering
- Zhengzhou University
- Zhengzhou
- P. R. China
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33
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Bian S, Pagan C, Andrianova “Artemyeva” AA, Du G. Synthesis of Polycarbonates and Poly(ether carbonate)s Directly from Carbon Dioxide and Diols Promoted by a Cs 2CO 3/CH 2Cl 2 System. ACS OMEGA 2016; 1:1049-1057. [PMID: 31457181 PMCID: PMC6640766 DOI: 10.1021/acsomega.6b00278] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 11/15/2016] [Indexed: 05/15/2023]
Abstract
Recently, polycarbonates have attracted considerable research interest because of their potential biodegradability and sustainability. Here, we present a direct route for the synthesis of polycarbonates and poly(ether carbonate)s from carbon dioxide (CO2) and diols, promoted by Cs2CO3 and CH2Cl2 under 1 atm of CO2. Quantitative conversion of diols and polymers with up to 11 kg/mol molecular weight could be obtained. While benzylic diols lead to predominantly carbonate linkage, aliphatic diols result in the incorporation of the methylene unit of CH2Cl2 that produces poly(ether carbonate)s. Both primary and secondary diols have been successfully incorporated into the polymer chain.
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Affiliation(s)
| | | | | | - Guodong Du
- E-mail: . Tel: +1-701-777-2241.
Fax: +1-701-777-2331
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34
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Ho CH, Chuang HJ, Lin PH, Ko BT. Copolymerization of carbon dioxide with cyclohexene oxide catalyzed by bimetallic dysprosium complexes containing hydrazine-functionalized Schiff-base derivatives. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/pola.28387] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Chia-Hsing Ho
- Department of Chemistry; National Chung Hsing University; Taichung 402 Taiwan
| | - Hui-Ju Chuang
- Department of Chemistry; National Chung Hsing University; Taichung 402 Taiwan
| | - Po-Heng Lin
- Department of Chemistry; National Chung Hsing University; Taichung 402 Taiwan
| | - Bao-Tsan Ko
- Department of Chemistry; National Chung Hsing University; Taichung 402 Taiwan
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35
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Wang XW, Hua YZ, Wang MC. Synthesis of 3-Indolylglycine Derivatives via Dinuclear Zinc Catalytic Asymmetric Friedel-Crafts Alkylation Reaction. J Org Chem 2016; 81:9227-9234. [PMID: 27626632 DOI: 10.1021/acs.joc.6b01805] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A direct asymmetric Friedel-Crafts (F-C) alkylation reaction between a wide range of indoles and ethyl 2-(4-methoxyphenylimino)acetate catalyzed by Trost's dinuclear complex is reported. A series of 3-indolylglycine derivatives were synthesized in enantioselectivity of up to >99% enantiomeric excess (ee) using 10 mol% catalyst loading under mild conditions. This atom economic reaction could be run on a gram scale without impacting its enantioselectivity. The absolute stereochemistry of catalytic products was determined by correlation with a known configuration compound. A possible mechanism was proposed for the asymmetric induction.
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Affiliation(s)
- Xin-Wei Wang
- College of Chemistry and Molecular Engineering, Zhengzhou University , No. 75, Daxue Street, Zhengzhou City, Henan Province 450052, P. R. China
| | - Yuan-Zhao Hua
- College of Chemistry and Molecular Engineering, Zhengzhou University , No. 75, Daxue Street, Zhengzhou City, Henan Province 450052, P. R. China
| | - Min-Can Wang
- College of Chemistry and Molecular Engineering, Zhengzhou University , No. 75, Daxue Street, Zhengzhou City, Henan Province 450052, P. R. China
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36
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Abbina S, Chidara VK, Bian S, Ugrinov A, Du G. Synthesis of ChiralC2-Symmetric Bimetallic Zinc Complexes of Amido-Oxazolinates and Their Application in Copolymerization of CO2and Cyclohexene Oxide. ChemistrySelect 2016. [DOI: 10.1002/slct.201600581] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Srinivas Abbina
- Department of Chemistry; University of North Dakota; Address 151 Cornell Street Stop 9024 Grand Forks, ND 58202 USA
| | - Vamshi K. Chidara
- Department of Chemistry; University of North Dakota; Address 151 Cornell Street Stop 9024 Grand Forks, ND 58202 USA
| | - Shi Bian
- Department of Chemistry; University of North Dakota; Address 151 Cornell Street Stop 9024 Grand Forks, ND 58202 USA
| | - Angel Ugrinov
- Department of Chemistry and Biochemistry; North Dakota State University; 1231 Albrecht Blvd, Fargo, ND 58102 USA
| | - Guodong Du
- Department of Chemistry; University of North Dakota; Address 151 Cornell Street Stop 9024 Grand Forks, ND 58202 USA
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37
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Lin PM, Chang CH, Chuang HJ, Liu CT, Ko BT, Lin CC. Bimetallic Nickel Complexes that Bear Diamine-Bis(Benzotriazole Phenolate) Derivatives as Efficient Catalysts for the Copolymerization of Carbon Dioxide with Epoxides. ChemCatChem 2016. [DOI: 10.1002/cctc.201501280] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Pei-Min Lin
- Department of Chemistry; National Chung Hsing University; Taichung 402 Taiwan
| | - Chi-Hang Chang
- Department of Chemistry; National Chung Hsing University; Taichung 402 Taiwan
| | - Hui-Ju Chuang
- Department of Chemistry; National Chung Hsing University; Taichung 402 Taiwan
| | - Cheng-Tang Liu
- Department of Chemistry; Chung Yuan Christian University; Chung-Li 320 Taiwan
| | - Bao-Tsan Ko
- Department of Chemistry; National Chung Hsing University; Taichung 402 Taiwan
| | - Chu-Chieh Lin
- Department of Chemistry; National Chung Hsing University; Taichung 402 Taiwan
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38
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Si G, Zhang L, Han B, Zhang H, Li X, Liu B. Chromium complexes containing a tetradentate [OSSO]-type bisphenolate ligand as a novel family of catalysts for the copolymerization of carbon dioxide and 4-vinylcyclohexene oxide. RSC Adv 2016. [DOI: 10.1039/c5ra27373k] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A functional polycarbonate is efficiently prepared by new [OSSO]CrX catalyzing the copolymerization of 4-vinylcyclohexene oxide with carbon dioxide.
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Affiliation(s)
- Gaoshan Si
- School of Chemical and Environmental Engineering
- Shanghai Institute of Technology
- Shanghai 201418
- China
| | - Li Zhang
- Department of Polymer Science and Engineering
- Hebei University of Technology
- Tianjin 300130
- China
| | - Bing Han
- Department of Polymer Science and Engineering
- Hebei University of Technology
- Tianjin 300130
- China
| | - Hongye Zhang
- Department of Polymer Science and Engineering
- Hebei University of Technology
- Tianjin 300130
- China
| | - Xiangqing Li
- School of Chemical and Environmental Engineering
- Shanghai Institute of Technology
- Shanghai 201418
- China
| | - Binyuan Liu
- Department of Polymer Science and Engineering
- Hebei University of Technology
- Tianjin 300130
- China
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39
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Group 4 complexes bearing bis(salphen) ligands: Synthesis, characterization, and polymerization studies. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/pola.27918] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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40
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Hua YZ, Liu MM, Huang PJ, Song X, Wang MC, Chang JB. A New Strategy for Enantioselective Construction of Multisubstituted Five-Membered Oxygen Heterocycles via a Domino Michael/Hemiketalization Reaction. Chemistry 2015; 21:11994-8. [PMID: 26177976 DOI: 10.1002/chem.201501655] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Indexed: 01/05/2023]
Abstract
A new highly enantioselective domino Michael/hemiketalization reaction of α-hydroxyacetophenone with β,γ-unsaturated α-keto esters for the synthesis of 2,2,4,5-tetrasubstituted chiral tetrahydrofurans is reported. With 2 mol % intramolecular dinuclear zinc-AzePhenol complex prepared in situ from the reaction of multidentate semi-azacrown ether ligand with ZnEt2 , the corresponding anti-multisubstituted tetrahydrofuran products were obtained in up to 90 % yields, and 98 % enantiomeric excess (ee) at 0 °C for 45 min. Moreover, the products were easily converted to 2,3,5-trisubstituted 2,3-dihydrofurans without any loss in optical activity.
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Affiliation(s)
- Yuan-Zhao Hua
- College of Chemistry and Molecular Engineering, Zhengzhou University, 75, Daxue Street, Zhengzhou City, 450052 (China)
| | - Meng-Meng Liu
- College of Chemistry and Molecular Engineering, Zhengzhou University, 75, Daxue Street, Zhengzhou City, 450052 (China)
| | - Pei-Jin Huang
- College of Chemistry and Molecular Engineering, Zhengzhou University, 75, Daxue Street, Zhengzhou City, 450052 (China)
| | - Xixi Song
- College of Chemistry and Molecular Engineering, Zhengzhou University, 75, Daxue Street, Zhengzhou City, 450052 (China)
| | - Min-Can Wang
- College of Chemistry and Molecular Engineering, Zhengzhou University, 75, Daxue Street, Zhengzhou City, 450052 (China).
| | - Jun-Biao Chang
- College of Chemistry and Molecular Engineering, Zhengzhou University, 75, Daxue Street, Zhengzhou City, 450052 (China).
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