1
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Xu Y, Liu D, Gao F, Li S, Zhang X, Wang L, Yang D. Harnessing Dpp-Imine as a Powerful Achiral Cocatalyst to Dramatically Increase the Efficiency and Stereoselectivity in a Magnesium-Mediated Oxa-Michael Reaction. JACS AU 2024; 4:164-176. [PMID: 38274262 PMCID: PMC10806778 DOI: 10.1021/jacsau.3c00584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 12/06/2023] [Accepted: 12/11/2023] [Indexed: 01/27/2024]
Abstract
Dpp-imines are classic model substrates for synthetic method studies. Here, we disclose their powerful use as achiral coligands in metal-catalyzed reactions. It is highly interesting to find that the Dpp-imine can not only act as powerful ligand to create excellent chiral pockets with magnesium complexes but also, more importantly, this coligand can dramatically enhance the catalytic ability of the metal catalyst. The underlying reaction mechanism was extensively explored by conducting a series of experiments, including 31P NMR studies of the coordination complex between the Dpp-imine coligand and magnesium complexes, ESI capture results, multiple control experiments, studies and comparison of different coligands, 1H NMR studies on the relationship between the substrate and Dpp-imine coligand, as well as the relationship between the substrate and the full complexes. Furthermore, DFT calculation provided valuable insights in the role of the imine additive and demonstrated that adding the Dpp-imine coligand in the magnesium catalyst can switch the deprotonation/nucleophilic addition steps from a stepwise mechanism to a concerted process during the oxa-cyclization reaction. The crucial factors responsible for the excellent enantioselectivity and enhanced reaction efficiency brought by Dpp-imine have been extracted from the calculation model. These mechanistic experiments and DFT calculation data clearly disclose and prove the powerful and interesting functions of the Dpp-imine coligand, which also direct a novel application of this type of active imine as useful ligands in metal-catalyzed asymmetric reactions.
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Affiliation(s)
- Yingfan Xu
- Key
Laboratory of Preclinical Study for New Drugs of Gansu Province, School
of Basic Medical Sciences & Research Unit of Peptide Science,
2019RU066, Lanzhou University, Lanzhou 730000, Gansu, P. R. China
| | - Dan Liu
- Institute
of Systems and Physical Biology, Shenzhen
Bay Laboratory, Shenzhen 518055, P. R. China
| | - Feiyun Gao
- Key
Laboratory of Preclinical Study for New Drugs of Gansu Province, School
of Basic Medical Sciences & Research Unit of Peptide Science,
2019RU066, Lanzhou University, Lanzhou 730000, Gansu, P. R. China
| | - Shixin Li
- Key
Laboratory of Preclinical Study for New Drugs of Gansu Province, School
of Basic Medical Sciences & Research Unit of Peptide Science,
2019RU066, Lanzhou University, Lanzhou 730000, Gansu, P. R. China
| | - Xiaoyong Zhang
- Institute
of Systems and Physical Biology, Shenzhen
Bay Laboratory, Shenzhen 518055, P. R. China
| | - Linqing Wang
- Key
Laboratory of Preclinical Study for New Drugs of Gansu Province, School
of Basic Medical Sciences & Research Unit of Peptide Science,
2019RU066, Lanzhou University, Lanzhou 730000, Gansu, P. R. China
| | - Dongxu Yang
- Key
Laboratory of Preclinical Study for New Drugs of Gansu Province, School
of Basic Medical Sciences & Research Unit of Peptide Science,
2019RU066, Lanzhou University, Lanzhou 730000, Gansu, P. R. China
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2
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Prasoon A, Yu X, Hambsch M, Bodesheim D, Liu K, Zacarias A, Nguyen NN, Seki T, Dianat A, Croy A, Cuniberti G, Fontaine P, Nagata Y, Mannsfeld SCB, Dong R, Bonn M, Feng X. Site-selective chemical reactions by on-water surface sequential assembly. Nat Commun 2023; 14:8313. [PMID: 38097633 PMCID: PMC10721922 DOI: 10.1038/s41467-023-44129-7] [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: 08/25/2023] [Accepted: 12/01/2023] [Indexed: 12/17/2023] Open
Abstract
Controlling site-selectivity and reactivity in chemical reactions continues to be a key challenge in modern synthetic chemistry. Here, we demonstrate the discovery of site-selective chemical reactions on the water surface via a sequential assembly approach. A negatively charged surfactant monolayer on the water surface guides the electrostatically driven, epitaxial, and aligned assembly of reagent amino-substituted porphyrin molecules, resulting in a well-defined J-aggregated structure. This constrained geometry of the porphyrin molecules prompts the subsequent directional alignment of the perylenetetracarboxylic dianhydride reagent, enabling the selective formation of a one-sided imide bond between porphyrin and reagent. Surface-specific in-situ spectroscopies reveal the underlying mechanism of the dynamic interface that promotes multilayer growth of the site-selective imide product. The site-selective reaction on the water surface is further demonstrated by three reversible and irreversible chemical reactions, such as imide-, imine-, and 1, 3-diazole (imidazole)- bonds involving porphyrin molecules. This unique sequential assembly approach enables site-selective chemical reactions that can bring on-water surface synthesis to the forefront of modern organic chemistry.
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Affiliation(s)
- Anupam Prasoon
- Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062, Dresden, Germany
- Max Planck Institute for Microstructure Physics, Halle (Saale), D-06120, Germany
| | - Xiaoqing Yu
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Mike Hambsch
- Center for Advancing Electronics Dresden (cfaed) and Faculty of Electrical and Computer Engineering, Technische Universität Dresden, 01062, Dresden, Germany
| | - David Bodesheim
- Institute for Materials Science and Max Bergmann Center of Biomaterials, Technische Universität Dresden, 01062, Dresden, Germany
| | - Kejun Liu
- Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062, Dresden, Germany
| | - Angelica Zacarias
- Max Planck Institute for Microstructure Physics, Halle (Saale), D-06120, Germany
| | - Nguyen Ngan Nguyen
- Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062, Dresden, Germany
| | - Takakazu Seki
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Aerzoo Dianat
- Institute for Materials Science and Max Bergmann Center of Biomaterials, Technische Universität Dresden, 01062, Dresden, Germany
| | - Alexander Croy
- Institute of Physical Chemistry, Friedrich Schiller University Jena, 07737, Jena, Germany
| | - Gianaurelio Cuniberti
- Institute for Materials Science and Max Bergmann Center of Biomaterials, Technische Universität Dresden, 01062, Dresden, Germany
- Dresden Center for Computational Materials Science (DCMS), Technische Universität Dresden, 01062, Dresden, Germany
| | - Philippe Fontaine
- Synchrotron SOLEIL, L'Orme des Merisiers, Départementale 128, 91190, Saint-Aubin, France
| | - Yuki Nagata
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Stefan C B Mannsfeld
- Center for Advancing Electronics Dresden (cfaed) and Faculty of Electrical and Computer Engineering, Technische Universität Dresden, 01062, Dresden, Germany.
| | - Renhao Dong
- Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062, Dresden, Germany.
- Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China.
| | - Mischa Bonn
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany.
| | - Xinliang Feng
- Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062, Dresden, Germany.
- Max Planck Institute for Microstructure Physics, Halle (Saale), D-06120, Germany.
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3
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Bai L, Wang L, Zhu H, Pang S, Li S, Lv J, Zhang H, Yang D. Development of ProPhenol/Ti(IV) Catalyst for Asymmetric Hydroxylative Dearomatization of Naphthols. Org Lett 2023; 25:867-871. [PMID: 36723617 DOI: 10.1021/acs.orglett.3c00077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
By development of ProPhenol/Ti(IV) catalysts, a catalytic enantioselective hydroxylative dearomatization of naphthols is achieved by using TBHP as a simple oxidative reagent. The side coordinative chain equipped on the C1-position of β-naphthols plays an important role for initiating this asymmetric hydroxylative reaction, which might be a result of the proper cocoordination effects to the titanium center in the catalyst. A reasonable catalytic cycle is proposed, the catalytic system is applied to a reasonable range of this type of phenolic compound, and related concise transformations are carried out.
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Affiliation(s)
- Lutao Bai
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Institute of Drug Design & Synthesis, School of Basic Medical Sciences, Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, Lanzhou 730000, China
| | - Linqing Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Institute of Drug Design & Synthesis, School of Basic Medical Sciences, Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, Lanzhou 730000, China
| | - Haiyong Zhu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Institute of Drug Design & Synthesis, School of Basic Medical Sciences, Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, Lanzhou 730000, China
| | - Shiming Pang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Institute of Drug Design & Synthesis, School of Basic Medical Sciences, Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, Lanzhou 730000, China
| | - Shixin Li
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Institute of Drug Design & Synthesis, School of Basic Medical Sciences, Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, Lanzhou 730000, China
| | - Jiaming Lv
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Institute of Drug Design & Synthesis, School of Basic Medical Sciences, Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, Lanzhou 730000, China
| | - Hailong Zhang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Institute of Drug Design & Synthesis, School of Basic Medical Sciences, Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, Lanzhou 730000, China
| | - Dongxu Yang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, Institute of Drug Design & Synthesis, School of Basic Medical Sciences, Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, Lanzhou 730000, China
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4
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Liang Y, Laporte AG, Bodlenner A, Compain P. Stereoselective Synthesis of Glycosyl Cyanides by TMSOTf‐Mediated Ring Opening of 1,6‐Anhydro Sugars. European J Org Chem 2023. [DOI: 10.1002/ejoc.202201311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Yan Liang
- Laboratoire d'Innovation Moléculaire et Applications (LIMA) Univ. de Strasbourg
- Univ. de Haute-Alsace
- CNRS (UMR 7042) Equipe de Synthèse Organique et Molécules Bioactives (SYBIO) ECPM 25 Rue Becquerel 67000 Strasbourg France
| | - Adrien G. Laporte
- Laboratoire d'Innovation Moléculaire et Applications (LIMA) Univ. de Strasbourg
- Univ. de Haute-Alsace
- CNRS (UMR 7042) Equipe de Synthèse Organique et Molécules Bioactives (SYBIO) ECPM 25 Rue Becquerel 67000 Strasbourg France
| | - Anne Bodlenner
- Laboratoire d'Innovation Moléculaire et Applications (LIMA) Univ. de Strasbourg
- Univ. de Haute-Alsace
- CNRS (UMR 7042) Equipe de Synthèse Organique et Molécules Bioactives (SYBIO) ECPM 25 Rue Becquerel 67000 Strasbourg France
| | - Philippe Compain
- Laboratoire d'Innovation Moléculaire et Applications (LIMA) Univ. de Strasbourg
- Univ. de Haute-Alsace
- CNRS (UMR 7042) Equipe de Synthèse Organique et Molécules Bioactives (SYBIO) ECPM 25 Rue Becquerel 67000 Strasbourg France
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5
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Asano K, Matsubara S. Organocatalytic Access to Tetrasubstituted Chiral Carbons Integrating Functional Groups. CHEM REC 2022:e202200200. [PMID: 36163471 DOI: 10.1002/tcr.202200200] [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: 08/08/2022] [Revised: 09/08/2022] [Indexed: 12/15/2022]
Abstract
Three-dimensional organic structures containing sp3 carbons bearing four non-hydrogen substituents can provide drug-like molecules. Although such complex structures are challenging targets in synthetic organic chemistry, efficient synthetic approaches will open a new chemical space for pharmaceutical candidates. This review provides an account of our recent achievements in developing organocatalytic approaches to attractive molecular platforms based on optically active sp3 carbons integrating four different functional groups. These methodologies include asymmetric cycloetherification and cyanation of multifunctional ketones, both of which take advantage of the mild characteristics of organocatalytic activation. Enzyme-like but non-enzymatic organocatalytic systems can be used to precisely manufacture molecules containing complex chiral structures without substrate specificity problems. In addition, these catalytic systems control not only stereoselectivity but also site-selectivity and do not induce side reactions even from substrates with rich functionality.
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Affiliation(s)
- Keisuke Asano
- Institute for Catalysis, Hokkaido University Sapporo, Hokkaido, 001-0021, Japan
| | - Seijiro Matsubara
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University Kyotodaigaku-Katsura, Nishikyo, Kyoto, 615-8510, Japan
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6
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7
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Nanda SK, Mallik R. Transition Metal-Catalyzed Hydroalkoxylation of Alkynes: An Overview. Chemistry 2021; 27:15571-15604. [PMID: 34343374 DOI: 10.1002/chem.202102194] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Indexed: 01/12/2023]
Abstract
Oxygen-bearing motifs, mainly the congener heterocycles are ubiquitous due to their presence in various natural products and bioactive scaffolds. Although in literature, several strategies have been developed for their synthesis, hydroalkoxylation of alkynes has come forward as a method of choice and has been used extensively. In particular, hydroalkoxylation of alkynes has gained enormous attention from the synthetic community due to the rapid access to a very useful and reactive synthetic intermediate like 'enol ether'. Furthermore, to manifold the utility of these methods, reports have been developed elaborating the generation of 'enol ether' using hydroalkoxylation and their usage in various reactions in cascade or tandem manner. This review focuses on recent development on the hydroalkoxylation of alkynes for the synthesis of oxygen-containing entities.
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Affiliation(s)
- Santosh K Nanda
- Department of Chemistry, School of Applied Science, Centurion University of Technology and Management Paralakhemundi, Odisha, 761211, India
| | - Rosy Mallik
- Department of Chemistry, School of Applied Science, Centurion University of Technology and Management Paralakhemundi, Odisha, 761211, India
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8
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Ohmatsu K, Morita Y, Kiyokawa M, Hoshino K, Ooi T. Catalytic Asymmetric Strecker Reaction of Ketoimines with Potassium Cyanide. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100608] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Kohsuke Ohmatsu
- Institute of Transformative Bio-Molecules (WPI-ITbM) Department of Molecular and Macromolecular Chemistry Graduate School of Engineering Nagoya University Nagoya 464-8601 Japan
| | - Yusuke Morita
- Institute of Transformative Bio-Molecules (WPI-ITbM) Department of Molecular and Macromolecular Chemistry Graduate School of Engineering Nagoya University Nagoya 464-8601 Japan
| | - Mari Kiyokawa
- Institute of Transformative Bio-Molecules (WPI-ITbM) Department of Molecular and Macromolecular Chemistry Graduate School of Engineering Nagoya University Nagoya 464-8601 Japan
| | - Kimihiro Hoshino
- Institute of Transformative Bio-Molecules (WPI-ITbM) Department of Molecular and Macromolecular Chemistry Graduate School of Engineering Nagoya University Nagoya 464-8601 Japan
| | - Takashi Ooi
- Institute of Transformative Bio-Molecules (WPI-ITbM) Department of Molecular and Macromolecular Chemistry Graduate School of Engineering Nagoya University Nagoya 464-8601 Japan
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9
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Affiliation(s)
- Santosh K. Nanda
- Department of chemistry School of Applied Science Centurion University of Technology and Management Paralakhemundi Odisha 761211 India
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10
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Murata R, Asano K, Matsubara S. Catalytic asymmetric cycloetherification via intramolecular oxy-Michael addition of enols. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132381] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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11
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Junge T, Titze M, Frey W, Peters R. Asymmetric Hydrocyanation of
N
‐Phosphinoyl Aldimines with Acetone Cyanohydrin by Cooperative Lewis Acid/Onium Salt/Brønsted Base Catalysis. ChemCatChem 2021. [DOI: 10.1002/cctc.202001921] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Thorsten Junge
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Marvin Titze
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Wolfgang Frey
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Germany
| | - René Peters
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Germany
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12
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Asano K. Multipoint Recognition of Molecular Conformations with Organocatalysts for Asymmetric Synthetic Reactions. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20200343] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Keisuke Asano
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
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13
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Lv XJ, Ming YC, Wu HC, Liu YK. Brønsted acid-catalyzed dynamic kinetic resolution of in situ formed acyclic N,O-hemiaminals: cascade synthesis of chiral cyclic N,O-aminals. Org Chem Front 2021. [DOI: 10.1039/d1qo01135a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A H2O controlled dynamic kinetic resolution was involved in a Brønsted acid-catalyzed acyclic N,O-hemiaminal formation/oxa-Michael reaction cascade, leading to highly enantioenriched cis-2,6-disubstituted tetrahydropyrans bearing an exo amide group.
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Affiliation(s)
- Xue-Jiao Lv
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Yong-Chao Ming
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Hui-Chun Wu
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Yan-Kai Liu
- Molecular Synthesis Center & Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266003, China
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14
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Peng T, Zhu H, Xu Y, Li D, Wang Y, Wang L, Liu X, Yang D, Wang R. Synergistic zinc catalyst mediated oxa-Michael kinetic resolution reaction. Org Chem Front 2021. [DOI: 10.1039/d1qo00402f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An oxa-Michael kinetic resolution reaction is developed to efficiently construct complexed polycyclic motifs by developing novel bifunctional zinc catalysts.
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Affiliation(s)
- Tianyu Peng
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province
- Institute of Drug Design & Synthesis
- Department of Pharmacology
- School of Basic Medical Sciences
- Lanzhou University
| | - Haiyong Zhu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province
- Institute of Drug Design & Synthesis
- Department of Pharmacology
- School of Basic Medical Sciences
- Lanzhou University
| | - Yingfan Xu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province
- Institute of Drug Design & Synthesis
- Department of Pharmacology
- School of Basic Medical Sciences
- Lanzhou University
| | - Dan Li
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province
- Institute of Drug Design & Synthesis
- Department of Pharmacology
- School of Basic Medical Sciences
- Lanzhou University
| | - Yuan Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province
- Institute of Drug Design & Synthesis
- Department of Pharmacology
- School of Basic Medical Sciences
- Lanzhou University
| | - Linqing Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province
- Institute of Drug Design & Synthesis
- Department of Pharmacology
- School of Basic Medical Sciences
- Lanzhou University
| | - Xin Liu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province
- Institute of Drug Design & Synthesis
- Department of Pharmacology
- School of Basic Medical Sciences
- Lanzhou University
| | - Dongxu Yang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province
- Institute of Drug Design & Synthesis
- Department of Pharmacology
- School of Basic Medical Sciences
- Lanzhou University
| | - Rui Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province
- Institute of Drug Design & Synthesis
- Department of Pharmacology
- School of Basic Medical Sciences
- Lanzhou University
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15
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Hu CX, Chen L, Hu D, Song X, Chen ZC, Du W, Chen YC. Construction of Enantioenriched 9H-Fluorene Frameworks via a Cascade Reaction Involving Remote Vinylogous Dynamic Kinetic Resolution. Org Lett 2020; 22:8973-8977. [PMID: 33175549 DOI: 10.1021/acs.orglett.0c03372] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Cui-Xia Hu
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Lin Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Di Hu
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Xue Song
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Zhi-Chao Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Wei Du
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
| | - Ying-Chun Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Ministry of Education and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China
- College of Pharmacy, Third Military Medical University, Shapingba, Chongqing 400038, China
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16
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Murata R, Matsumoto A, Asano K, Matsubara S. Desymmetrization of gem-diols via water-assisted organocatalytic enantio- and diastereoselective cycloetherification. Chem Commun (Camb) 2020; 56:12335-12338. [PMID: 32896841 DOI: 10.1039/d0cc05509c] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The first desymmetrization of gem-diols forming chiral hemiketal carbons was accomplished via organocatalytic enantio- and diastereoselective cycloetherification, which afforded optically active tetrahydropyrans containing a chiral hemiketal carbon and tetrasubstituted stereocenters bearing synthetically versatile fluorinated groups. The desymmetrization of silanediols was also demonstrated as an asymmetric route to chiral silicon centers.
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Affiliation(s)
- Ryuichi Murata
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan.
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17
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Wada Y, Murata R, Fujii Y, Asano K, Matsubara S. Enantio- and Diastereoselective Construction of Contiguous Tetrasubstituted Chiral Carbons in Organocatalytic Oxadecalin Synthesis. Org Lett 2020; 22:4710-4715. [DOI: 10.1021/acs.orglett.0c01501] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Yuuki Wada
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
| | - Ryuichi Murata
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
| | - Yuki Fujii
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
| | - Keisuke Asano
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
| | - Seijiro Matsubara
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
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18
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Bertuzzi G, Silvestrini F, Moimare P, Pecorari D, Mazzanti A, Bernardi L, Fochi M. Chemodivergent Preparation of Various Heterocycles
via
Phase‐Transfer Catalysis: Enantioselective Synthesis of Functionalized Piperidines. Adv Synth Catal 2020. [DOI: 10.1002/adsc.201901500] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Giulio Bertuzzi
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU BolognaAlma Mater Studiorum University of Bologna V. Risorgimento 4 40136 Bologna Italy
| | - Filippo Silvestrini
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU BolognaAlma Mater Studiorum University of Bologna V. Risorgimento 4 40136 Bologna Italy
| | - Pierluigi Moimare
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU BolognaAlma Mater Studiorum University of Bologna V. Risorgimento 4 40136 Bologna Italy
| | - Daniel Pecorari
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU BolognaAlma Mater Studiorum University of Bologna V. Risorgimento 4 40136 Bologna Italy
| | - Andrea Mazzanti
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU BolognaAlma Mater Studiorum University of Bologna V. Risorgimento 4 40136 Bologna Italy
| | - Luca Bernardi
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU BolognaAlma Mater Studiorum University of Bologna V. Risorgimento 4 40136 Bologna Italy
| | - Mariafrancesca Fochi
- Department of Industrial Chemistry “Toso Montanari” & INSTM RU BolognaAlma Mater Studiorum University of Bologna V. Risorgimento 4 40136 Bologna Italy
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19
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Velardo A, Capaccio V, Caruso T, Di Mola A, Massa A, Tedesco C, Caporaso L, Falivene L, Palombi L. Desymmetrization of 2-Cyano- N
-tosylbenzylidenimine with Thiols and Organocatalytic Heterocyclization by Dynamic Resolution: Mechanism Investigation. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901499] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Amalia Velardo
- Dipartimento di Chimica e Biologia; Università degli Studi di Salerno; Via Giovanni Paolo II, 132 84084 Fiscyano (SA) Italy
| | - Vito Capaccio
- Dipartimento di Chimica e Biologia; Università degli Studi di Salerno; Via Giovanni Paolo II, 132 84084 Fiscyano (SA) Italy
| | - Tonino Caruso
- Dipartimento di Chimica e Biologia; Università degli Studi di Salerno; Via Giovanni Paolo II, 132 84084 Fiscyano (SA) Italy
| | - Antonia Di Mola
- Dipartimento di Chimica e Biologia; Università degli Studi di Salerno; Via Giovanni Paolo II, 132 84084 Fiscyano (SA) Italy
| | - Antonio Massa
- Dipartimento di Chimica e Biologia; Università degli Studi di Salerno; Via Giovanni Paolo II, 132 84084 Fiscyano (SA) Italy
| | - Consiglia Tedesco
- Dipartimento di Chimica e Biologia; Università degli Studi di Salerno; Via Giovanni Paolo II, 132 84084 Fiscyano (SA) Italy
| | - Lucia Caporaso
- Dipartimento di Chimica e Biologia; Università degli Studi di Salerno; Via Giovanni Paolo II, 132 84084 Fiscyano (SA) Italy
| | - Laura Falivene
- Chemical and Life Sciences and Engineering; Kaust Catalysis Center; King Abdullah University of Science and Technology; 23955-6900 Thuwal Saudi Arabia
| | - Laura Palombi
- Dipartimento di Chimica e Biologia; Università degli Studi di Salerno; Via Giovanni Paolo II, 132 84084 Fiscyano (SA) Italy
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20
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Kawanishi R, Hattori S, Iwasa S, Shibatomi K. Amine-Catalyzed Decarboxylative Aldol Reaction of β-Ketocarboxylic Acids with Trifluoropyruvates. Molecules 2019; 24:E2773. [PMID: 31366138 PMCID: PMC6695914 DOI: 10.3390/molecules24152773] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Revised: 07/19/2019] [Accepted: 07/25/2019] [Indexed: 11/16/2022] Open
Abstract
Decarboxylative aldol reaction of aliphatic carboxylic acids is a useful method for C-C bond formation because carboxylic acids are an easily available class of compounds. In this study, we found that the decarboxylative aldol reaction of tertiary β-ketocarboxylic acids and trifluoropyruvates proceeded smoothly to yield the corresponding aldol products in high yields and with high diastereoselectivity in the presence of a tertiary amine catalyst. In this reaction, we efficiently constructed a quaternary carbon center and an adjacent trifluoromethylated carbon center. This protocol was also extended to an enantioselective reaction with a chiral amine catalyst, and the desired product was obtained with up to 73% enantioselectivity.
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Affiliation(s)
- Ryouta Kawanishi
- Department of Applied Chemistry and Life Science, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi 441-8580, Japan
| | - Shinya Hattori
- Department of Applied Chemistry and Life Science, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi 441-8580, Japan
| | - Seiji Iwasa
- Department of Applied Chemistry and Life Science, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi 441-8580, Japan
| | - Kazutaka Shibatomi
- Department of Applied Chemistry and Life Science, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi 441-8580, Japan.
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21
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Matsumoto A, Asano K, Matsubara S. Asymmetric
syn
‐1,3‐Dioxane Construction via Kinetic Resolution of Secondary Alcohols Using Chiral Phosphoric Acid Catalysts. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900239] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Akira Matsumoto
- Department of Material Chemistry Graduate School of EngineeringKyoto University Kyotodaigaku-katsura, Nishikyo Kyoto 615-8510 Japan
| | - Keisuke Asano
- Department of Material Chemistry Graduate School of EngineeringKyoto University Kyotodaigaku-katsura, Nishikyo Kyoto 615-8510 Japan
| | - Seijiro Matsubara
- Department of Material Chemistry Graduate School of EngineeringKyoto University Kyotodaigaku-katsura, Nishikyo Kyoto 615-8510 Japan
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22
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Kurimoto Y, Nasu T, Fujii Y, Asano K, Matsubara S. Asymmetric Cycloetherification of in Situ Generated Cyanohydrins through the Concomitant Construction of Three Chiral Carbon Centers. Org Lett 2019; 21:2156-2160. [PMID: 30869909 DOI: 10.1021/acs.orglett.9b00462] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The organocatalytic enantio- and diastereoselective cycloetherification of in situ generated cyanohydrins through the concomitant construction of three chiral carbon centers is reported. This protocol facilitates the concise synthesis of optically active tetrahydropyran derivatives, which are ubiquitous scaffolds found in various bioactive compounds, through the simultaneous construction of multiple bonds and stereogenic centers, including tetrasubstituted chiral carbons. The resulting products also contain multiple synthetically important functional groups, which expand their possible usefulness as chiral building blocks.
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Affiliation(s)
- Yosuke Kurimoto
- Department of Material Chemistry, Graduate School of Engineering , Kyoto University , Kyotodaigaku-Katsura, Nishikyo , Kyoto 615-8510 , Japan
| | - Teruhisa Nasu
- Department of Material Chemistry, Graduate School of Engineering , Kyoto University , Kyotodaigaku-Katsura, Nishikyo , Kyoto 615-8510 , Japan
| | - Yuki Fujii
- Department of Material Chemistry, Graduate School of Engineering , Kyoto University , Kyotodaigaku-Katsura, Nishikyo , Kyoto 615-8510 , Japan
| | - Keisuke Asano
- Department of Material Chemistry, Graduate School of Engineering , Kyoto University , Kyotodaigaku-Katsura, Nishikyo , Kyoto 615-8510 , Japan
| | - Seijiro Matsubara
- Department of Material Chemistry, Graduate School of Engineering , Kyoto University , Kyotodaigaku-Katsura, Nishikyo , Kyoto 615-8510 , Japan
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23
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Matsumoto A, Asano K, Matsubara S. Organocatalytic Enantio- and Diastereoselective Construction of syn-1,3-Diol Motifs via Dynamic Kinetic Resolution of In Situ Generated Chiral Cyanohydrins. Org Lett 2019; 21:2688-2692. [DOI: 10.1021/acs.orglett.9b00677] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Akira Matsumoto
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
| | - Keisuke Asano
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
| | - Seijiro Matsubara
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8510, Japan
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24
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Zhang D, Lian M, Liu J, Tang S, Liu G, Ma C, Meng Q, Peng H, Zhu D. Preparation of O-Protected Cyanohydrins by Aerobic Oxidation of α-Substituted Malononitriles in the Presence of Diarylphosphine Oxides. Org Lett 2019; 21:2597-2601. [DOI: 10.1021/acs.orglett.9b00569] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Dapeng Zhang
- Department of Pharmaceutics, Harbin Medical University (Daqing), Daqing 163319, China
| | - Mingming Lian
- Department of Pharmaceutics, Harbin Medical University (Daqing), Daqing 163319, China
| | - Jia Liu
- Department of Pharmaceutics, Harbin Medical University (Daqing), Daqing 163319, China
| | - Shukun Tang
- Department of Pharmaceutics, Harbin Medical University (Daqing), Daqing 163319, China
| | - Guangzhi Liu
- Irradiation Technology Application Factory of Changshu, Changshu 215557, China
| | - Cunfei Ma
- State Key Laboratory of Fine Chemicals, School of Pharmaceutical Science and Technology Department, Dalian University of Technology, Dalian 116024, China
| | - Qingwei Meng
- State Key Laboratory of Fine Chemicals, School of Pharmaceutical Science and Technology Department, Dalian University of Technology, Dalian 116024, China
| | - Haisheng Peng
- Department of Pharmaceutics, Harbin Medical University (Daqing), Daqing 163319, China
| | - Daling Zhu
- Department of Pharmaceutics, Harbin Medical University (Daqing), Daqing 163319, China
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25
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Xu J, Hu L. Asymmetric one-pot synthesis of five- and six-membered lactones via dynamic covalent kinetic resolution: Exploring the regio- and stereoselectivities of lipase. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.02.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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26
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Matsumoto A, Asano K, Matsubara S. Kinetic Resolution of Acylsilane Cyanohydrins via Organocatalytic Cycloetherification. Chem Asian J 2019; 14:116-120. [PMID: 30408346 DOI: 10.1002/asia.201801600] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 11/07/2018] [Indexed: 12/15/2022]
Abstract
An asymmetric cyanation of acylsilanes involving the in-situ formation of chiral acylsilane cyanohydrins followed by their kinetic resolution via organocatalytic cycloetherification is described. The highly enantio- and diastereoselective cycloetherification was crucial for achieving a high efficiency in the kinetic resolution. Consequently, acylsilane cyanohydrins containing a tetrasubstituted chiral carbon atom bearing silyl, cyano, and hydroxy groups were obtained in an enantioenriched form. This protocol therefore offers an efficient catalytic approach to optically active acylsilane cyanohydrins, which exhibit potential as chiral building blocks for the synthesis of pharmaceutically relevant chiral organosilanes.
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Affiliation(s)
- Akira Matsumoto
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-katsura, Nishikyo, Kyoto, 615-8510, Japan
| | - Keisuke Asano
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-katsura, Nishikyo, Kyoto, 615-8510, Japan
| | - Seijiro Matsubara
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyotodaigaku-katsura, Nishikyo, Kyoto, 615-8510, Japan
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27
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Wang L, Yang D, Li D, Liu X, Wang P, Wang K, Zhu H, Bai L, Wang R. The Important Role of the Byproduct Triphenylphosphine Oxide in the Magnesium(II)-Catalyzed Enantioselective Reaction of Hemiacetals and Phosphorus Ylides. Angew Chem Int Ed Engl 2018; 57:9088-9092. [DOI: 10.1002/anie.201804177] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Indexed: 01/02/2023]
Affiliation(s)
- Linqing Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province; School of Basic Medical Sciences; Lanzhou University; Lanzhou 730000 P. R. China
| | - Dongxu Yang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province; School of Basic Medical Sciences; Lanzhou University; Lanzhou 730000 P. R. China
| | - Dan Li
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province; School of Basic Medical Sciences; Lanzhou University; Lanzhou 730000 P. R. China
| | - Xihong Liu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province; School of Basic Medical Sciences; Lanzhou University; Lanzhou 730000 P. R. China
| | - Pengxin Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province; School of Basic Medical Sciences; Lanzhou University; Lanzhou 730000 P. R. China
| | - Kezhou Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province; School of Basic Medical Sciences; Lanzhou University; Lanzhou 730000 P. R. China
| | - Haiyong Zhu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province; School of Basic Medical Sciences; Lanzhou University; Lanzhou 730000 P. R. China
| | - Lutao Bai
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province; School of Basic Medical Sciences; Lanzhou University; Lanzhou 730000 P. R. China
| | - Rui Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province; School of Basic Medical Sciences; Lanzhou University; Lanzhou 730000 P. R. China
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28
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Wang L, Yang D, Li D, Liu X, Wang P, Wang K, Zhu H, Bai L, Wang R. The Important Role of the Byproduct Triphenylphosphine Oxide in the Magnesium(II)-Catalyzed Enantioselective Reaction of Hemiacetals and Phosphorus Ylides. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201804177] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Linqing Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province; School of Basic Medical Sciences; Lanzhou University; Lanzhou 730000 P. R. China
| | - Dongxu Yang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province; School of Basic Medical Sciences; Lanzhou University; Lanzhou 730000 P. R. China
| | - Dan Li
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province; School of Basic Medical Sciences; Lanzhou University; Lanzhou 730000 P. R. China
| | - Xihong Liu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province; School of Basic Medical Sciences; Lanzhou University; Lanzhou 730000 P. R. China
| | - Pengxin Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province; School of Basic Medical Sciences; Lanzhou University; Lanzhou 730000 P. R. China
| | - Kezhou Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province; School of Basic Medical Sciences; Lanzhou University; Lanzhou 730000 P. R. China
| | - Haiyong Zhu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province; School of Basic Medical Sciences; Lanzhou University; Lanzhou 730000 P. R. China
| | - Lutao Bai
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province; School of Basic Medical Sciences; Lanzhou University; Lanzhou 730000 P. R. China
| | - Rui Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province; School of Basic Medical Sciences; Lanzhou University; Lanzhou 730000 P. R. China
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