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Satou M, Kiyooka A, Tsuji Y, Fujihara T. Pyridines Bearing Poly(ethylene glycol) Chains: Synthesis and Use as Ligands. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000062] [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)
- Motoi Satou
- Department of Energy and Hydrocarbon ChemistryGraduate School of EngineeringKyoto University Nishikyo-Ku Kyoto 615-8510 Japan
| | - Arata Kiyooka
- Department of Energy and Hydrocarbon ChemistryGraduate School of EngineeringKyoto University Nishikyo-Ku Kyoto 615-8510 Japan
| | - Yasushi Tsuji
- Department of Energy and Hydrocarbon ChemistryGraduate School of EngineeringKyoto University Nishikyo-Ku Kyoto 615-8510 Japan
| | - Tetsuaki Fujihara
- Department of Energy and Hydrocarbon ChemistryGraduate School of EngineeringKyoto University Nishikyo-Ku Kyoto 615-8510 Japan
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2
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Zeng W, Tan X, Yu Y, Chen GQ, Zhang X. Copper-Catalyzed Asymmetric Hydrosilylation of β-Nitroethyl Aryl Ketones. Org Lett 2020; 22:858-862. [DOI: 10.1021/acs.orglett.9b04339] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Weijun Zeng
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen 518000, People’s Republic of China
| | - Xuefeng Tan
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen 518000, People’s Republic of China
| | - Yang Yu
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen 518000, People’s Republic of China
| | - Gen-Qiang Chen
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen 518000, People’s Republic of China
- Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen 518000, People’s Republic of China
| | - Xumu Zhang
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen 518000, People’s Republic of China
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3
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Castro V, Noti C, Chen W, Cristau M, Livignston A, Rodríguez H, Albericio F. Novel Globular Polymeric Supports for Membrane-Enhanced Peptide Synthesis. Macromolecules 2017. [DOI: 10.1021/acs.macromol.6b02258] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Vida Castro
- Institute for Research in Biomedicine
(IRB Barcelona), 08028 Barcelona, Spain
| | | | | | | | | | - Hortensia Rodríguez
- Institute for Research in Biomedicine
(IRB Barcelona), 08028 Barcelona, Spain
- School of Chemistry, Yachay Tech, Yachay City of Knowledge, Urcuqui, Ecuador
| | - Fernando Albericio
- Institute for Research in Biomedicine
(IRB Barcelona), 08028 Barcelona, Spain
- Department of Organic Chemistry, University of Barcelona, 08028 Barcelona, Spain
- Networking Centre
on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 08028 Barcelona, Spain
- School of Chemistry, University of KwaZulu Natal, Durban 4000, South Africa
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4
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ISLAM NASHREENS, BORUAH JEENAJYOTI. Macromolecular peroxo complexes of Vanadium(V) and Molybdenum(VI): Catalytic activities and biochemical relevance. J CHEM SCI 2015. [DOI: 10.1007/s12039-015-0833-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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5
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Wang ZJ, Wang PH, Lv JJ, Feng JJ, Xu X, Wang AJ, Au CT, Qiu R. Cu(ii)@Luviset clear as recyclable catalyst for the formation of C–C bond in homo-coupling of terminal alkynes. RSC Adv 2015. [DOI: 10.1039/c5ra17834g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A recyclable catalytic system of Cu(ii)@Luviset clear was developed for the homo-coupling of terminal alkyne with excellent product yield.
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Affiliation(s)
- Zheng-Jun Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410012
- China
| | - Peng-Hui Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410012
- China
| | - Jing-Jing Lv
- College of Geography and Environmental Science
- College of Chemistry and Life Science
- Zhejiang Normal University
- Jinhua 321004
- China
| | - Jiu-Ju Feng
- College of Geography and Environmental Science
- College of Chemistry and Life Science
- Zhejiang Normal University
- Jinhua 321004
- China
| | - Xinhua Xu
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410012
- China
| | - Ai-Jun Wang
- College of Geography and Environmental Science
- College of Chemistry and Life Science
- Zhejiang Normal University
- Jinhua 321004
- China
| | - Chak-Tong Au
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410012
- China
| | - Renhua Qiu
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410012
- China
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6
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Abd-El-Aziz A, Dalgakiran S. Metal-Containing Macromolecules. POLYMER SCIENCE: A COMPREHENSIVE REFERENCE 2012:637-688. [DOI: 10.1016/b978-0-444-53349-4.00155-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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7
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Wang J, Zhao L, Shi H, He J. Highly Enantioselective and Efficient Asymmetric Epoxidation Catalysts: Inorganic Nanosheets Modified with α-Amino Acids as Ligands. Angew Chem Int Ed Engl 2011; 50:9171-6. [DOI: 10.1002/anie.201103713] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2011] [Indexed: 11/08/2022]
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8
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Wang J, Zhao L, Shi H, He J. Highly Enantioselective and Efficient Asymmetric Epoxidation Catalysts: Inorganic Nanosheets Modified with α-Amino Acids as Ligands. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201103713] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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9
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Hsiao YS, Yellol GS, Chen LH, Sun CM. Multidisciplinary Synthetic Approach for Rapid Combinatorial Library Synthesis of Triaza-Fluorenes. ACTA ACUST UNITED AC 2010; 12:723-32. [DOI: 10.1021/cc1000902] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Ya-Shan Hsiao
- Department of Chemistry, National Chiao Tung University, Hsinchu 300-10, Taiwan
| | - Gorakh S. Yellol
- Department of Chemistry, National Chiao Tung University, Hsinchu 300-10, Taiwan
| | - Li-Hsun Chen
- Department of Chemistry, National Chiao Tung University, Hsinchu 300-10, Taiwan
| | - Chung-Ming Sun
- Department of Chemistry, National Chiao Tung University, Hsinchu 300-10, Taiwan
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11
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Gupta K, Kumar Sutar A, Lin CC. Polymer-supported Schiff base complexes in oxidation reactions. Coord Chem Rev 2009. [DOI: 10.1016/j.ccr.2009.03.019] [Citation(s) in RCA: 309] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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12
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Shaughnessy KH. Hydrophilic ligands and their application in aqueous-phase metal-catalyzed reactions. Chem Rev 2009; 109:643-710. [PMID: 19152291 DOI: 10.1021/cr800403r] [Citation(s) in RCA: 375] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Kevin H Shaughnessy
- Department of Chemistry and the Center for Green Manufacturing, The University of Alabama, Box 870336, Tuscaloosa, Alabama 35487-0336, USA.
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Cha RT, Wang SY, Cheng SL. Polymeric cinchona alkaloids for the catalytic asymmetric dihydroxylation of olefins. J Appl Polym Sci 2008. [DOI: 10.1002/app.27710] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Poupon JC, Boezio AA, Charette AB. Tetraarylphosphonium Salts as Solubility-Control Groups: Phosphonium-Supported Triphenylphosphine and Azodicarboxylate Reagents. Angew Chem Int Ed Engl 2006; 45:1415-20. [PMID: 16425329 DOI: 10.1002/anie.200503599] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jean-Christophe Poupon
- Département de Chimie, Université de Montréal, P.O. Box 6128, Station Downtown, Montréal, Québec H3C 3J7, Canada
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Poupon JC, Boezio AA, Charette AB. Tetraarylphosphonium Salts as Solubility-Control Groups: Phosphonium-Supported Triphenylphosphine and Azodicarboxylate Reagents. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200503599] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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19
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THE SYNTHESIS OF SOLUBLE POLYMER-SUPPORTED CHIRAL BINOL LIGANDS AND ASYMMETRIC ADDITION REACTIONS. ACTA POLYM SIN 2006. [DOI: 10.3724/sp.j.1105.2006.00371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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20
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Lv J, Wang X, Liu J, Zhang L, Wang Y. Catalytic asymmetric epoxidation of chalcones under poly(ethylene glycol)-supported Cinchona ammonium salt catalyzed conditions. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.tetasy.2006.01.029] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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21
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HAYASHI K, KIM S, CHIBA K. Reversible Capture of Electrogenerated Intermediates by Liquefiable Micro-particles Containing an Amphiphilic Tag. ELECTROCHEMISTRY 2006. [DOI: 10.5796/electrochemistry.74.621] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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22
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Taylor PC, Wall MD, Woodward PR. Synthesis of dendritic oligo(aryl sulfone)s as supports for synthesis. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.09.103] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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23
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Kumaraswamy G, Jena N, Sastry M, Rao GV, Ankamma K. Synthesis of 6,6′- and 6-MeO–PEG–BINOL-Ca soluble polymer bound ligands and their application in asymmetric Michael and epoxidation reactions. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.molcata.2004.12.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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24
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Mandoli A, Pini D, Fiori M, Salvadori P. Asymmetric Dihydroxylation with Recoverable Cinchona Alkaloid Derivatives: A Warning Note and an Improved, Insoluble Polymer-Bound Ligand Architecture. European J Org Chem 2005. [DOI: 10.1002/ejoc.200400752] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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25
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Ying J, Xiao-Li S, Ru J, Sheng-Yong Z. An Economical, Highly Efficient and Recyclable Catalyst System for Asymmetric Dihydroxylation of Olefins. CHINESE J CHEM 2005. [DOI: 10.1002/cjoc.200590326] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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26
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Yang XW, Liu HQ, Xu MH, Lin GQ. Enantioselective Dihydroxylation of Alkenes Catalyzed by a PEG-Bound Bi-Cinchona Alkaloid Ligand. CHINESE J CHEM 2005. [DOI: 10.1002/cjoc.200590015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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27
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Sedlák M. Recent Advances in Chemistry and Applications of Substituted Poly(ethylene glycol)s. ACTA ACUST UNITED AC 2005. [DOI: 10.1135/cccc20050269] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Poly(ethylene glycol)s are well defined and easily accessible macromolecules with suitable properties for applications in chemistry, biotechnologies and medicine. The terminal hydroxy groups of poly(ethylene glycol)s can easily be converted into reactive functional groups by a number of routine reactions of organic chemistry. The chemical reagents or catalysts anchored to poly(ethylene glycol) chains were used in a number of syntheses including the enantioselective ones. Poly(ethylene glycol)s serve as carriers in combinatorial syntheses in the liquid phase. Coupling of poly(ethylene glycol)s with other polymers was used to prepare series of block copolymers having numerous applications. From the point of view of medical applications it is significant that substituted poly(ethylene glycol)s are non-toxic and resistant to recognition by the immunity system. That is why they are often used as carriers of many low-molecular-weight as well as high-molecular-weight medical drugs (drug delivery systems). In the conjugates with drugs their biological activity increases and their toxicity decreases. A review with 41 references.
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Cheng SK, Zhang SY, Wang PA, Kuang YQ, Sun XL. Homogeneous catalytic asymmetric dihydroxylation of olefins induced by an efficient and recoverable polymer-bound ligand QN-AQN-OPEG-OMe. Appl Organomet Chem 2005. [DOI: 10.1002/aoc.936] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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29
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Zhao D, Sun J, Ding K. New Types of Soluble Polymer-Supported Bisphosphine Ligands with a Cyclobutane Backbone for Pd-Catalyzed Enantioselective Allylic Substitution Reactions. Chemistry 2004; 10:5952-63. [PMID: 15487028 DOI: 10.1002/chem.200400488] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
A highly efficient and practical optical resolution of anti head-to-head racemic coumarin dimer 7 has been achieved by molecular complexation with TADDOL, (-)-8, through a hydrogen bonding interaction to afford the corresponding two enantiomers, (-)- and (+)-7, in 70 and 75 % yields, respectively, with >99 % ee. Starting from enantiopure (-)-7, a new type of C2-symmetric bisphosphine ligand (S,S,S,S)-3 with a cyclobutane backbone has been synthesized in good yield by facile transformations. The asymmetric induction efficiency of these chiral bisphosphine ligands in Pd-catalyzed asymmetric allylic substitution reactions was evaluated. Under the experimental conditions, the allylic substitution products could be obtained in excellent yields (up to 99 %) and enantioselectivities (up to 98.9 % ee). By taking advantage of the high enantioselectivity of this catalytic reaction and the easily derivable carboxylate groups on the cyclobutane backbone of ligand (S,S,S,S)-3, a new type of analogous ligand (S,S,S,S)-4 as well as the MeO-PEG-supported soluble ligand (S,S,S,S)-5 (PEG=polyethylene glycol) have also been synthesized and utilized in asymmetric allylic substitution reactions. In particular, the MeO-PEG supported (S,S,S,S)-5 b had a synergistic effect on the enantioselectivity of the reaction compared with its nonsupported precursor (S,S,S,S)-4 c, affording the corresponding allylation products 14 a and 14 b with excellent enantioselectivities (94.6 and 97.2 % ee, respectively). Moreover, the Pd complex of (S,S,S,S)-5 b could easily be recovered and recycled several times without significant loss of enantioselectivity and activity in the allylic substitution reactions.
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Affiliation(s)
- Dongbo Zhao
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, China
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30
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Rheiner PB, Sellner H, Seebach D. Dendritic styryl TADDOLs as novel polymer cross-linkers: First application in an enantioselective Et2Zn addition mediated by a polymer-incorporated titanate. Preliminary communication. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19970800702] [Citation(s) in RCA: 78] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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31
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Deng GJ, Yi B, Huang YY, Tang WJ, He YM, Fan QH. Dendronized Poly(Ru-BINAP) Complexes: Highly Effective and Easily Recyclable Catalysts For Asymmetric Hydrogenation. Adv Synth Catal 2004. [DOI: 10.1002/adsc.200404162] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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32
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Köckritz A, Bartoszek M, Döbler C, Beller M, Mägerlein W, Militzer HC. Development of protocols for the separation of Os catalysts from organic products in the catalytic dihydroxylation of olefins. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.molcata.2004.03.040] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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A highly efficient and practical new PEG-bound bi-cinchona alkaloid ligand for the catalytic asymmetric aminohydroxylation of alkenes. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.tetasy.2004.05.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Chinchilla R, Mazón P, Nájera C. Polymer-supported Cinchona alkaloid-derived ammonium salts as recoverable phase-transfer catalysts for the asymmetric synthesis of alpha-amino acids. Molecules 2004; 9:349-64. [PMID: 18007436 PMCID: PMC6147302 DOI: 10.3390/90500349] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2004] [Accepted: 03/22/2004] [Indexed: 11/16/2022] Open
Abstract
Alkaloids such as cinchonidine, quinine and N-methylephedrine have been N-alkylated using polymeric benzyl halides or co-polymerized and then N-alkylated, thus affording a series of polymer-supported chiral ammonium salts which have been employed as phase-transfer catalysts in the asymmetric benzylation of an N-(diphenylmethylene)glycine ester. These new polymeric catalysts can be easily recovered by simple filtration after the reaction and reused. The best ee's were achieved when Merrifield resin-anchored cinchonidinium ammonium salts were employed.
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Affiliation(s)
| | | | - Carmen Nájera
- Departamento de Química Orgánica and Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain. Tel.: (+34) 965 903728, Fax: (+34) 965 903549
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Kuang YQ, Zhang SY, Wei LL. A Soluble Block Copolymer-Supportedbis-Cinchona Alkaloid Ligand for the Asymmetric Dihydroxylation of Olefins. SYNTHETIC COMMUN 2003. [DOI: 10.1081/scc-120024740] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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36
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Liu XY, Ding XB, Zheng ZH, Peng YX, Long XP, Wang XC, Chan ASC, Yip CW. Synthesis of novel magnetic polymer microspheres with amphiphilic structure. J Appl Polym Sci 2003. [DOI: 10.1002/app.12860] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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37
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Anyanwu UK, Venkataraman D. Effect of spacers on the activity of soluble polymer supported catalysts for the asymmetric addition of diethylzinc to aldehydes. Tetrahedron Lett 2003. [DOI: 10.1016/s0040-4039(03)01588-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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38
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Edwards CW, Haddleton DM, Morsley D, Shipton MR, Wills M. Synthesis and preliminary studies on a novel class of soluble amino alcohol reagents based on methacrylate copolymers. Tetrahedron 2003. [DOI: 10.1016/s0040-4020(03)00975-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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39
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Yang BY, Chen XM, Deng GJ, Zhang YL, Fan QH. Chiral dendritic bis(oxazoline) copper(II) complexes as Lewis acid catalysts for enantioselective aldol reactions in aqueous media. Tetrahedron Lett 2003. [DOI: 10.1016/s0040-4039(03)00680-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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40
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Liu XY, Ding XB, Zheng ZH, Peng YX, Chan AS, Yip C, Long XP. Synthesis of amphiphilic magnetic microspheres by dispersion copolymerization of styrene and poly(ethylene oxide) macromonomer. POLYM INT 2003. [DOI: 10.1002/pi.1031] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Affiliation(s)
- Choong Eui Song
- Life Sciences Division, Korea Institute of Science and Technology, PO Box 131, Cheongryang, Seoul, 130-650, Korea
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Dickerson TJ, Reed NN, Janda KD. Soluble polymers as scaffolds for recoverable catalysts and reagents. Chem Rev 2002; 102:3325-44. [PMID: 12371887 DOI: 10.1021/cr010335e] [Citation(s) in RCA: 414] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tobin J Dickerson
- Department of Chemistry and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA
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Fan QH, Li YM, Chan ASC. Recoverable catalysts for asymmetric organic synthesis. Chem Rev 2002; 102:3385-466. [PMID: 12371889 DOI: 10.1021/cr010341a] [Citation(s) in RCA: 696] [Impact Index Per Article: 31.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Qing-Hua Fan
- Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing, People's Republic of China
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Chiba K, Kono Y, Kim S, Nishimoto K, Kitano Y, Tada M. A liquid-phase peptide synthesis in cyclohexane-based biphasic thermomorphic systems. Chem Commun (Camb) 2002:1766-7. [PMID: 12196989 DOI: 10.1039/b205156g] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Combinations of typical organic solvents composed of cyclohexane and qualified aprotic polar organic solvents were found to realize an effective, biphasic thermomorphic system in arbitrary ratios of upper and lower phases that enable a practical application of a liquid-phase peptide synthesis.
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Affiliation(s)
- Kazuhiro Chiba
- Laboratory of Bio-Organic Chemistry, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan.
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Choudary BM, Chowdari NS, Jyothi K, Kantam ML. Catalytic asymmetric dihydroxylation of olefins with reusable OsO(4)(2-) on ion-exchangers: the scope and reactivity using various cooxidants. J Am Chem Soc 2002; 124:5341-9. [PMID: 11996575 DOI: 10.1021/ja017889j] [Citation(s) in RCA: 132] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Exchanger-OsO(4) catalysts are prepared by an ion-exchange technique using layered double hydroxides and quaternary ammonium salts covalently bound to resin and silica as ion-exchangers. The ion-exchangers with different characteristics and opposite ion selectivities are specially chosen to produce the best heterogeneous catalyst that can operate using the various cooxidants in the asymmetric dihydroxylation reaction. LDH-OsO(4) catalysts composed of different compositions are evaluated for the asymmetric dihydroxylation of trans-stilbene. Resin-OsO(4) and SiO(2)-OsO(4) designed to overcome the problems associated with LDH-OsO(4) indeed show consistent activity and enantioselectivity in asymmetric dihydroxylation of olefins using K(3)Fe(CN)(6) and molecular oxygen as cooxidants. Compared to the Kobayashi heterogeneous systems, resin-OsO(4) is a very efficient catalyst for the dihydroxylation of a wide variety of aromatic, aliphatic, acyclic, cyclic, mono-, di-, and trisubstituted olefins to afford chiral vicinal diols with high yields and enantioselectivities irrespective of the cooxidant used. Resin-OsO(4) is recovered quantitatively by a simple filtration and reused for a number of cycles with consistent activity. The high binding ability of the heterogeneous osmium catalyst enables the use of an equimolar ratio of ligand to osmium to give excellent enantioselectives in asymmetric dihydroxylation in contrast to the homogeneous osmium system in which excess molar quantities of the expensive chiral ligand to osmium are invariably used. The complexation of the chiral ligand (DHQD)(2)PHAL, having very large dimension, a prerequisite to obtain higher ee, is possible only with the OsO(4)(2-) located on the surface of the supports.
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Affiliation(s)
- Boyapati M Choudary
- Contribution from the Indian Institute of Chemical Technology, Hyderabad 500 007, India
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Kuang YQ, Zhang SY, Jiang R, Wei LL. A free ligand for the asymmetric dihydroxylation of olefins utilizing one-phase catalysis and two-phase separation. Tetrahedron Lett 2002. [DOI: 10.1016/s0040-4039(02)00624-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Yang GC, Chen ZX, Zhang ZJ. Combinatorial synthesis of novel thiourea derivatives on a modified poly(ethylene glycol). REACT FUNCT POLYM 2002. [DOI: 10.1016/s1381-5148(01)00102-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Fan QH, Liu GH, Deng GJ, Chen XM, Chan AS. New soluble bifunctional polymeric chiral ligands for enantioselectively catalytic reactions. Tetrahedron Lett 2001. [DOI: 10.1016/s0040-4039(01)02004-4] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Jayaprakash D, Sasai H. Synthesis and catalytic applications of soluble polymer-supported BINOL. ACTA ACUST UNITED AC 2001. [DOI: 10.1016/s0957-4166(01)00443-8] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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A simple and effective soluble polymer-bound ligand for the asymmetric dihydroxylation of olefins: DHQD-PHAL-OPEG-OMe. Tetrahedron Lett 2001. [DOI: 10.1016/s0040-4039(01)01105-4] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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