1
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Zhang Y, Han H, Wei Z, Dikarev EV. Trickier than It Looks: Isomerization between Five- and Six-Coordinated Zinc in Heterometallic Li 2Zn 2 Molecule. Inorg Chem 2024; 63:12426-12432. [PMID: 38905706 PMCID: PMC11234357 DOI: 10.1021/acs.inorgchem.4c00634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/23/2024]
Abstract
This report describes the synthesis and characterization of two heterobimetallic Li-Zn coordination isomers [Li2Zn2(tbaoac)6] (tbaoac = tert-butyl acetoacetato) that have been isolated separately by the same stoichiometric reaction run in different organic solvents. The 6-coordinated zinc isomer (6-Zn) was synthesized in acetone with high yield, while the 5-coordinated one (5-Zn) was readily obtained from ethanol. The 5-Zn isomer has a low solubility in organic solvents such as alkanes and haloalkanes, while its 6-Zn counterpart exhibits a good solubility in almost all common solvents. Two isomeric molecules feature similar centrosymmetric tetranuclear cyclic assemblies, which are different in their arrangement of tbaoac ligands. While all ligands act as μ2-type in the structure of 5-Zn, the two tbaoac groups chelating Li appear as μ3-type in 6-Zn, thus providing an additional coordination for Zn ions. However, the real structural transformation between these isomers was shown to be more complex than simply making or breaking a couple of Zn-O bonds. X-ray single-crystal structure analysis, powder X-ray diffraction, multinuclear NMR, DART mass spectrometry, ICP-OES analysis, and TGA have been employed for the characterization of the isomers. The combination of powder X-ray diffraction and 1H NMR investigation revealed that 6-Zn isomer can be quantitatively transformed to 5-Zn in ethanol, while the reverse conversion instantly takes place in acetone.
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Affiliation(s)
- Yuxuan Zhang
- Department of Chemistry, University at Albany, Albany, New York 12222, United States
| | - Haixiang Han
- School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
| | - Zheng Wei
- Department of Chemistry, University at Albany, Albany, New York 12222, United States
| | - Evgeny V Dikarev
- Department of Chemistry, University at Albany, Albany, New York 12222, United States
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2
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Ajormal F, Bikas R, Noshiranzadeh N, Emami M, Kozakiewicz-Piekarz A. Synthesis of chiral Cu(II) complexes from pro-chiral Schiff base ligand and investigation of their catalytic activity in the asymmetric synthesis of 1,2,3-triazoles. Sci Rep 2024; 14:10603. [PMID: 38719987 PMCID: PMC11079015 DOI: 10.1038/s41598-024-60930-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Accepted: 04/29/2024] [Indexed: 05/12/2024] Open
Abstract
A pro-chiral Schiff base ligand (HL) was synthesized by the reaction of 2-amino-2-ethyl-1,3-propanediol and pyridine-2-carbaldehyde in methanol. The reaction of HL with CuCl2·2H2O and CuBr2 in methanol gave neutral mononuclear Cu(II) complexes with general formula of [Cu(HL)Cl2] (1) and [Cu(HL)Br2] (2), respectively. By slow evaporation of the methanolic solutions of 1 and 2, their enantiomers were isolated in crystalline format. The formation of pure chiral crystals in the racemic mixture was amply authenticated by single crystal X-ray analysis, which indicated that S-[Cu(HL)Cl2], R-[Cu(HL)Cl2], and S-[Cu(HL)Br2] are crystallized in chiral P212121 space group of orthorhombic system. Preferential crystallization was used to isolate the R and S enantiomers as single crystals and the isolated compounds were also studied by CD analysis. Structural studies indicated that the origin of the chirality in these compounds is related to the coordination mode of the employed pro-chiral ligand (HL) because one of its carbon atoms has been converted to a chiral center in the synthesized complexes. Subsequently, these complexes were used in click synthesis of a β-hydroxy-1,2,3-triazole and the results of catalytic studies indicated that 1 and 2 can act as enantioselective catalysts for the asymmetric synthesis of β-hydroxy-1,2,3-triazole product under mild condition. This study illustrates the significant capacity of the use of pro-chiral ligands in preparing chiral catalysts based on complexes which can also be considered as an effective approach to cheap chiral catalysts from achiral reagents.
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Affiliation(s)
- Fatemeh Ajormal
- Department of Chemistry, Faculty of Science, University of Zanjan, Zanjan, 45371-38791, Iran
| | - Rahman Bikas
- Department of Chemistry, Faculty of Science, Imam Khomeini International University, Qazvin, 34148-96818, Iran.
| | - Nader Noshiranzadeh
- Department of Chemistry, Faculty of Science, University of Zanjan, Zanjan, 45371-38791, Iran.
| | - Marzieh Emami
- Department of Chemistry, Faculty of Science, University of Zanjan, Zanjan, 45371-38791, Iran
| | - Anna Kozakiewicz-Piekarz
- Department of Biomedical and Polymer Chemistry, Faculty of Chemistry, Nicolaus Copernicus University in Torun, 87-100, Torun, Poland
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3
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4
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Tavares NCT, Cacho VRG, Costa DCS, Nunes SCC, Pais AACC, Murtinho D, Silva Serra ME. Deciphering the mechanism behind efficient enantioselective ethylation with thiazolidine‐based amino alcohols. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | - Dora C. S. Costa
- CQC and Department of Chemistry University of Coimbra Coimbra Portugal
| | | | | | - Dina Murtinho
- CQC and Department of Chemistry University of Coimbra Coimbra Portugal
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5
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Zhang B, Ma X, Yan B, Ni C, Yu H, Yang Z, Roesky HW. An efficient catalytic method for hydrophosphination of heterocumulenes with diethylzinc as precatalyst without a solvent. Dalton Trans 2021; 50:15488-15492. [PMID: 34723295 DOI: 10.1039/d1dt02706a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Commercially available compound ZnEt2 acts as an efficient precatalyst for the solvent-free hydrophosphinations of heterocumulenes using Ph2PH as reagent. As far as we knew, this has been not reported in group 12 metal catalyzing reactions. A suggested mechanism of this reaction is explored, and the intermediate [{Ph2PC(NiPr)2}ZnEt]2 is obtained and characterized by a single-crystal X-ray structural analysis.
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Affiliation(s)
- Bingyi Zhang
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, P. R. China.
| | - Xiaoli Ma
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, P. R. China.
| | - Ben Yan
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, P. R. China.
| | - Congjian Ni
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, P. R. China.
| | - Hailong Yu
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, P. R. China.
| | - Zhi Yang
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, P. R. China.
| | - Herbert W Roesky
- Institute of Inorganic Chemistry, Georg-August-Universität Göttingen, Göttingen Tammannstrasse 4, D-37077, Germany.
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6
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Towards deeper understanding of multifaceted chemistry of magnesium alkylperoxides. Commun Chem 2021; 4:123. [PMID: 36697811 PMCID: PMC9814855 DOI: 10.1038/s42004-021-00560-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 08/02/2021] [Indexed: 01/28/2023] Open
Abstract
Despite considerable progress in the multifaceted chemistry of non-redox-metal alkylperoxides, the knowledge about magnesium alkylperoxides is in its infancy and only started to gain momentum. Harnessing the well-defined dimeric magnesium tert-butylperoxide [(f5BDI)Mg(μ-η2:η1-OOtBu)]2 incorporating a fluorinated β-diketiminate ligand, herein, we demonstrate its transformation at ambient temperature to a spiro-type, tetranuclear magnesium alkylperoxide [(f5BDI)2Mg4(μ-OOtBu)6]. The latter compound was characterized by single-crystal X-ray diffraction and its molecular structure can formally be considered as a homoleptic magnesium tert-butylperoxide [Mg(µ-OOtBu)2]2 terminated by two monomeric magnesium tert-butylperoxides. The formation of the tetranuclear magnesium alkylperoxide not only contradicts the notion of the high instability of magnesium alkylperoxides, but also highlights that there is much to be clarified with respect to the solution behaviour of these species. Finally, we probed the reactivity of the dimeric alkylperoxide in model oxygen transfer reactions like the commonly invoked metathesis reaction with the parent alkylmagnesium and the catalytic epoxidation of trans-chalcone with tert-butylhydroperoxide as an oxidant. The results showed that the investigated system is among the most active known catalysts for the epoxidation of enones.
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8
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Abstract
This review collects for the first time enantioselective one-pot processes promoted
by green chiral zinc catalysts. It illustrates how much these cheap, non-toxic and environmentally
benign catalysts allow unprecedented asymmetric domino and tandem reactions of many
types to be achieved, allowing direct access to a wide variety of very complex chiral molecules.
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Affiliation(s)
- Hélène Pellissier
- Aix-Marseille University, CNRS, Centrale Marseille, iSm2, Marseille, France
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9
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Affiliation(s)
- Manfred Braun
- Institute of Organic and Macromolecular Chemistry Heinrich-Heine-University Düsseldorf Universitätsstr. 1 40225 Düsseldorf Germany
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10
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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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11
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Stefaniak M, Buda S, Mlynarski J. Asymmetric hetero‐Diels‐Alder Reaction of
trans
‐1‐Methoxy‐3‐trimethylsilyloxy‐buta‐1,3‐diene Catalyzed by Zinc Complexes. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000822] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Matylda Stefaniak
- Faculty of Chemistry Jagiellonian University Gronostajowa 2 30‐387 Krakow Poland
| | - Szymon Buda
- Faculty of Chemistry Jagiellonian University Gronostajowa 2 30‐387 Krakow Poland
| | - Jacek Mlynarski
- Institute of Organic Chemistry Polish Academy of Sciences Kasprzaka 44/52 01‐224 Warsaw Poland
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12
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Uvarov VM, de Vekki DA. Recent progress in the development of catalytic systems for homogenous asymmetric hydrosilylation of ketones. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121415] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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13
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α-amination reaction of different ketones mediated by carbohydrate Cu2+ complexes. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.111058] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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Aoki S, Kikuchi C, Kitagawa Y, Hasegawa Y, Sonoike S, Saga Y, Hatanaka M. Evaluation of Zn
2+
Coordination Structures in Chiral Zn
2+
Complexes Based on Shape Measurement Factors: Relationships between Activity and the Coordination Structure. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900934] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Shin Aoki
- Faculty of Pharmaceutical Sciences Tokyo University of Science 2641 Yamazaki 278‐8510 Noda Chiba Japan
- Research Institute for Science and Technology Tokyo University of Science 2641 Yamazaki 278‐8510 Noda Chiba Japan
| | - Chiharu Kikuchi
- Faculty of Pharmaceutical Sciences Tokyo University of Science 2641 Yamazaki 278‐8510 Noda Chiba Japan
| | - Yuichi Kitagawa
- Faculty of Engineering and Graduate School of Engineering Hokkaido University Kita‐13 Jo. Nishi‐8 Chome 060‐8628 Sapporo Hokkaido Japan
| | - Yasuchika Hasegawa
- Faculty of Engineering and Graduate School of Engineering Hokkaido University Kita‐13 Jo. Nishi‐8 Chome 060‐8628 Sapporo Hokkaido Japan
| | - Shotaro Sonoike
- Faculty of Pharmaceutical Sciences Tokyo University of Science 2641 Yamazaki 278‐8510 Noda Chiba Japan
- Chugai Pharmaceutical Co., Ltd. 2‐1–1‐Nihonbashi Muromachi, Cyuo‐ku 103‐8324 Tokyo Japan
| | - Yutaka Saga
- Faculty of Pharmaceutical Sciences Tokyo University of Science 2641 Yamazaki 278‐8510 Noda Chiba Japan
| | - Miho Hatanaka
- Institute for Research Initiatives Division for Research Strategy Graduate School of Science and Technology, and Nara Institute of Science and Technology 8916‐5 Takayama‐cho, Ikoma‐shi 630‐0192 Nara Japan
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15
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Yasuda M, Saga Y, Tokunaga T, Itoh S, Aoki S. Stereoselective aldol reactions of dihydroxyacetone derivatives catalyzed by chiral Zn2+ complexes. Tetrahedron 2019. [DOI: 10.1016/j.tet.2018.12.060] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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16
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Tavares NC, Neves CT, Milne BF, Murtinho D, Pais AA, Serra MES. Chiral thiazolidines in the enantioselective ethylation of aldehydes: An experimental and computational study. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.09.027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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17
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Nikoorazm M, Ghorbani F, Ghorbani-Choghamarani A, Erfani Z. Mild and highly efficient method for the oxidation of sulfides and oxidative coupling of thiols catalyzed by Fe3O4@MCM-41@VO-SPATB as efficient and magnetically recoverable nanocatalyst. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2018. [DOI: 10.1007/s13738-018-1536-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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18
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Kinens A, Balkaitis S, Suna E. Preparative-Scale Synthesis of Vedejs Chiral DMAP Catalysts. J Org Chem 2018; 83:12449-12459. [PMID: 30256638 DOI: 10.1021/acs.joc.8b01687] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A scalable synthesis of chiral Vedejs-type DMAP catalysts is reported. The key step of the synthesis is amination of the enantiomerically pure 4-chloropyridine derivative using well-defined ZnCl2(amine)2 complexes. A series of Zn(II)-amine complexes have been synthesized to explore the scope of the ZnCl2-mediated amination of 4-halopyridines. Mechanistic studies support a Zn(II)-facilitated nucleophilic aromatic substitution as a plausible mechanism for the chlorine-to-amine exchange.
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Affiliation(s)
- Artis Kinens
- Latvian Institute of Organic Synthesis , Aizkraukles 21 , LV-1006 Riga , Latvia.,Department of Chemistry , University of Latvia , Jelgavas 1 , LV-1004 Riga , Latvia
| | - Simonas Balkaitis
- Latvian Institute of Organic Synthesis , Aizkraukles 21 , LV-1006 Riga , Latvia.,Department of Chemistry , University of Latvia , Jelgavas 1 , LV-1004 Riga , Latvia
| | - Edgars Suna
- Latvian Institute of Organic Synthesis , Aizkraukles 21 , LV-1006 Riga , Latvia.,Department of Chemistry , University of Latvia , Jelgavas 1 , LV-1004 Riga , Latvia
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19
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Owolabi IA, Subba Reddy U, Chennapuram M, Seki C, Okuyama Y, Kwon E, Uwai K, Tokiwa M, Takeshita M, Nakano H. A new type of amino amide organocatalyzed enantioselective crossed aldol reaction of ketones with aromatic aldehydes. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.07.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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20
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Hornillos V, Carmona JA, Ros A, Iglesias-Sigüenza J, López-Serrano J, Fernández R, Lassaletta JM. Dynamic Kinetic Resolution of Heterobiaryl Ketones by Zinc-Catalyzed Asymmetric Hydrosilylation. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201713200] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Valentín Hornillos
- Instituto Investigaciones Químicas (CSIC-US); Centro de Innovación en Química Avanzada (ORFEO-CINQA); C/ Américo Vespucio 49 41092 Sevilla Spain
| | - José A. Carmona
- Instituto Investigaciones Químicas (CSIC-US); Centro de Innovación en Química Avanzada (ORFEO-CINQA); C/ Américo Vespucio 49 41092 Sevilla Spain
| | - Abel Ros
- Instituto Investigaciones Químicas (CSIC-US); Centro de Innovación en Química Avanzada (ORFEO-CINQA); C/ Américo Vespucio 49 41092 Sevilla Spain
- Departamento de Química Orgánica (Universidad de Sevilla); Centro de Innovación en Química Avanzada (ORFEO-CINQA); C/ Prof. García González 1 41012 Sevilla Spain
| | - Javier Iglesias-Sigüenza
- Departamento de Química Orgánica (Universidad de Sevilla); Centro de Innovación en Química Avanzada (ORFEO-CINQA); C/ Prof. García González 1 41012 Sevilla Spain
| | - Joaquín López-Serrano
- Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA).; Universidad de Sevilla and Instituto de Investigaciones Científicas (CSIC-US); Avda. Américo Vespucio 49 41092 Sevilla Spain
| | - Rosario Fernández
- Departamento de Química Orgánica (Universidad de Sevilla); Centro de Innovación en Química Avanzada (ORFEO-CINQA); C/ Prof. García González 1 41012 Sevilla Spain
| | - José M. Lassaletta
- Instituto Investigaciones Químicas (CSIC-US); Centro de Innovación en Química Avanzada (ORFEO-CINQA); C/ Américo Vespucio 49 41092 Sevilla Spain
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21
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Hornillos V, Carmona JA, Ros A, Iglesias-Sigüenza J, López-Serrano J, Fernández R, Lassaletta JM. Dynamic Kinetic Resolution of Heterobiaryl Ketones by Zinc-Catalyzed Asymmetric Hydrosilylation. Angew Chem Int Ed Engl 2018; 57:3777-3781. [DOI: 10.1002/anie.201713200] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 02/08/2018] [Indexed: 11/09/2022]
Affiliation(s)
- Valentín Hornillos
- Instituto Investigaciones Químicas (CSIC-US); Centro de Innovación en Química Avanzada (ORFEO-CINQA); C/ Américo Vespucio 49 41092 Sevilla Spain
| | - José A. Carmona
- Instituto Investigaciones Químicas (CSIC-US); Centro de Innovación en Química Avanzada (ORFEO-CINQA); C/ Américo Vespucio 49 41092 Sevilla Spain
| | - Abel Ros
- Instituto Investigaciones Químicas (CSIC-US); Centro de Innovación en Química Avanzada (ORFEO-CINQA); C/ Américo Vespucio 49 41092 Sevilla Spain
- Departamento de Química Orgánica (Universidad de Sevilla); Centro de Innovación en Química Avanzada (ORFEO-CINQA); C/ Prof. García González 1 41012 Sevilla Spain
| | - Javier Iglesias-Sigüenza
- Departamento de Química Orgánica (Universidad de Sevilla); Centro de Innovación en Química Avanzada (ORFEO-CINQA); C/ Prof. García González 1 41012 Sevilla Spain
| | - Joaquín López-Serrano
- Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA).; Universidad de Sevilla and Instituto de Investigaciones Científicas (CSIC-US); Avda. Américo Vespucio 49 41092 Sevilla Spain
| | - Rosario Fernández
- Departamento de Química Orgánica (Universidad de Sevilla); Centro de Innovación en Química Avanzada (ORFEO-CINQA); C/ Prof. García González 1 41012 Sevilla Spain
| | - José M. Lassaletta
- Instituto Investigaciones Químicas (CSIC-US); Centro de Innovación en Química Avanzada (ORFEO-CINQA); C/ Américo Vespucio 49 41092 Sevilla Spain
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22
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Milbeo P, Moulat L, Didierjean C, Aubert E, Martinez J, Calmès M. C
1
-Symmetric 1,2-Diaminobicyclo[2.2.2]octane Ligands in Copper-Catalyzed Asymmetric Henry Reaction: Catalyst Development and DFT Studies. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701452] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Pierre Milbeo
- IBMM; UMR 5247 CNRS-Université Montpellier-ENSCM; Place Eugène Bataillon 34095 Montpellier France
| | - Laure Moulat
- IBMM; UMR 5247 CNRS-Université Montpellier-ENSCM; Place Eugène Bataillon 34095 Montpellier France
| | - Claude Didierjean
- CNRS, CRM2; Université de Lorraine; Boulevard des Aiguillettes 54506 Nancy France
| | - Emmanuel Aubert
- CNRS, CRM2; Université de Lorraine; Boulevard des Aiguillettes 54506 Nancy France
| | - Jean Martinez
- IBMM; UMR 5247 CNRS-Université Montpellier-ENSCM; Place Eugène Bataillon 34095 Montpellier France
| | - Monique Calmès
- IBMM; UMR 5247 CNRS-Université Montpellier-ENSCM; Place Eugène Bataillon 34095 Montpellier France
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23
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Raţ CI, Soran A, Varga RA, Silvestru C. C–H Bond Activation Mediated by Inorganic and Organometallic Compounds of Main Group Metals. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2018. [DOI: 10.1016/bs.adomc.2018.07.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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24
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Pothanagandhi N, Vijayakrishna K. RAFT derived chiral and achiral poly(ionic liquids) resins: Synthesis and application in organocatalysis. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.08.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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25
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Saranya S, Harry NA, Ujwaldev SM, Anilkumar G. Recent Advances and Perspectives on the Zinc-Catalyzed Nitroaldol (Henry) Reaction. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700290] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Salim Saranya
- School of Chemical Sciences; Mahatma Gandhi University; Priyadarsini Hills Kottayam Kerala 686560 India
| | - Nissy Ann Harry
- School of Chemical Sciences; Mahatma Gandhi University; Priyadarsini Hills Kottayam Kerala 686560 India
| | | | - Gopinathan Anilkumar
- School of Chemical Sciences; Mahatma Gandhi University; Priyadarsini Hills Kottayam Kerala 686560 India
- Advanced Molecular Materials Research Centre (AMMRC); Mahatma Gandhi University; Priyadarsini Hills Kottayam Kerala 686560 India
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26
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Romain C, Garden JA, Trott G, Buchard A, White AJP, Williams CK. Di-Zinc-Aryl Complexes: CO 2 Insertions and Applications in Polymerisation Catalysis. Chemistry 2017; 23:7367-7376. [PMID: 28370511 PMCID: PMC5488170 DOI: 10.1002/chem.201701013] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Indexed: 11/05/2022]
Abstract
Two new di-zinc-aryl complexes, [LZn2 Ph2 ] and [LZn2 (C6 F5 )2 ], coordinated by a diphenol tetraamine macrocyclic ligand have been prepared and fully characterised, including by single-crystal X-ray diffraction experiments. The complexes' reactivities with monomers including carbon dioxide, cyclohexene oxide, phthalic anhydride, isopropanol and phenol were investigated using both experimental studies and density functional theory calculations. In particular, [LZn2 Ph2 ] readily inserts carbon dioxide to form a carboxylate, at 1 bar pressure, whereas [LZn2 (C6 F5 )2 ] does not react. Under these conditions [LZn2 Ph2 ] shows moderate activity in the ring-opening copolymerisation of cyclohexene oxide/carbon dioxide (TOF=20 h-1 ), cyclohexene oxide/phthalic anhydride (TOF=33 h-1 ) and the ring-opening polymerisations of rac-lactide (TOF=99 h-1 ) and ϵ-caprolactone (TOF=5280 h-1 ).
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Affiliation(s)
- Charles Romain
- Department of ChemistryImperial College LondonLondonSW7 2AZUK
| | | | - Gemma Trott
- Department of ChemistryChemistry Research LaboratoryUniversity of Oxford12 Mansfield RoadOxfordOX2 3TAUK
| | | | | | - Charlotte K. Williams
- Department of ChemistryChemistry Research LaboratoryUniversity of Oxford12 Mansfield RoadOxfordOX2 3TAUK
- Department of ChemistryImperial College LondonLondonSW7 2AZUK
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27
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Synthesis of 2,3-dihydroquinazolin-4(1H)-ones, disulfides and sulfoxides catalyzed by a zinc complex immobilized onto functionalized mesoporous MCM-41 as a mild and efficient catalyst. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2017. [DOI: 10.1007/s13738-017-1072-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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28
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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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29
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Szewczyk M, Bezłada A, Mlynarski J. Zinc-Catalyzed Enantioselective Hydrosilylation of Ketones and Imines under Solvent-Free Conditions. ChemCatChem 2016. [DOI: 10.1002/cctc.201601140] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Marcin Szewczyk
- Faculty of Chemistry; Jagiellonian University; Ingardena 3 30-060 Krakow Poland
| | - Agata Bezłada
- Faculty of Chemistry; Jagiellonian University; Ingardena 3 30-060 Krakow Poland
| | - Jacek Mlynarski
- Faculty of Chemistry; Jagiellonian University; Ingardena 3 30-060 Krakow Poland
- Institute of Organic Chemistry; Polish Academy of Sciences; Kasprzaka 44/52 01-224 Warsaw Poland
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30
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Yamashita Y, Minami K, Saito Y, Kobayashi S. Development of a Simple Adjustable Zinc Acid/Base Hybrid Catalyst for C-C and C-O Bond-Forming and C-C Bond-Cleavage Reactions. Chem Asian J 2016; 11:2372-6. [PMID: 27400735 DOI: 10.1002/asia.201600682] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2016] [Indexed: 11/11/2022]
Abstract
A newly designed zinc Lewis acid/base hybrid catalyst was developed. By adjusting the Lewis acidity of the zinc center, aldol-type additions of 2-picolylamine Schiff base to aldehydes proceeded smoothly to afford syn-aldol adduct equivalents, trans-N,O-acetal adducts, in high yields with high selectivities. NMR experiments, including microchanneled cell for synthesis monitoring (MICCS) NMR analysis, revealed that anti-aldol adducts were formed at the initial stage of the reactions under kinetic control, but the final products were the trans-(syn)-N,O-acetal adducts that were produced through a retro-aldol process under thermodynamic control. In the whole reaction process, the zinc catalyst played three important roles: i) promotion of the aldol process (C-C bond formation), ii) cyclization process to the N,O-acetal product (C-O bond formation), and iii) retro-aldol process from the anti-aldol adduct to the syn-aldol adduct (C-C bond cleavage and C-C bond formation).
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Affiliation(s)
- Yasuhiro Yamashita
- Department of Chemistry, School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Kodai Minami
- Department of Chemistry, School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Yuki Saito
- Department of Chemistry, School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Shū Kobayashi
- Department of Chemistry, School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
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31
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Huo X, He R, Zhang X, Zhang W. An Ir/Zn Dual Catalysis for Enantio- and Diastereodivergent α-Allylation of α-Hydroxyketones. J Am Chem Soc 2016; 138:11093-6. [PMID: 27548761 DOI: 10.1021/jacs.6b06156] [Citation(s) in RCA: 232] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
An Ir/Zn dual catalysis has been developed for the enantio- and diastereodivergent α-allylation of unprotected α-hydroxyketones under mild conditions, in the absence of any additional base. The cooperative action of a chiral iridium complex derived from phosphoramidites and a chiral Zn-ProPhenol complex is most likely responsible for its high reactivity, excellent enantioselectivity (up to >99% ee), and good diastereoselectivity (up to >20:1 dr). All four product stereoisomers could be prepared from the same set of starting materials and under identical conditions by simple selection of appropriate catalyst combinations.
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Affiliation(s)
- Xiaohong Huo
- School of Pharmacy and ‡School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University , Shanghai 200240, P. R. China
| | - Rui He
- School of Pharmacy and ‡School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University , Shanghai 200240, P. R. China
| | - Xiao Zhang
- School of Pharmacy and ‡School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University , Shanghai 200240, P. R. China
| | - Wanbin Zhang
- School of Pharmacy and ‡School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University , Shanghai 200240, P. R. China
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32
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Naganawa Y, Nishiyama H. Renovation of Optically Active Phenanthrolines as Powerful Chiral Ligands for Versatile Asymmetric Metal Catalysis. CHEM REC 2016; 16:2573-2584. [PMID: 27500684 DOI: 10.1002/tcr.201600078] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Indexed: 01/26/2023]
Abstract
In the field of asymmetric synthesis, the development of new chiral ligands has been regarded as an attractive challenge for decades. Novel chiral ligands can often have a great impact on synthetic protocols. In this context, we are currently interested in the application of 1,10-phenanthroline (phen) as an entirely new class of chiral ligand. To handle this issue, we designed a chiral phen ligand that provides the N,N,O-tridentate coordination of the phen moiety and an additional phenolic hydroxyl group. As phen possesses greater coordination ability with various ions, our chiral phen ligand would be valuable as one of the "privileged" chiral ligands applied to a broad range of metal catalysts and new reactions. This account summarizes the results of the application of the chiral phen ligand to various kinds of metal catalysis.
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Affiliation(s)
- Yuki Naganawa
- Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Chikusa, Nagoya, 464-8603, Japan
| | - Hisao Nishiyama
- Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Chikusa, Nagoya, 464-8603, Japan
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33
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Bleith T, Deng QH, Wadepohl H, Gade LH. Radical Changes in Lewis Acid Catalysis: Matching Metal and Substrate. Angew Chem Int Ed Engl 2016; 55:7852-6. [DOI: 10.1002/anie.201603072] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Indexed: 11/05/2022]
Affiliation(s)
- Tim Bleith
- Anorganisch-Chemisches Institut; Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Qing-Hai Deng
- Anorganisch-Chemisches Institut; Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials; Shanghai Normal University; Shanghai 200234 P.R. China
| | - Hubert Wadepohl
- Anorganisch-Chemisches Institut; Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Lutz H. Gade
- Anorganisch-Chemisches Institut; Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
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34
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Bleith T, Deng QH, Wadepohl H, Gade LH. Radical Changes in Lewis Acid Catalysis: Matching Metal and Substrate. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201603072] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Tim Bleith
- Anorganisch-Chemisches Institut; Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Qing-Hai Deng
- Anorganisch-Chemisches Institut; Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials; Shanghai Normal University; Shanghai 200234 P.R. China
| | - Hubert Wadepohl
- Anorganisch-Chemisches Institut; Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Lutz H. Gade
- Anorganisch-Chemisches Institut; Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
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35
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Adamkiewicz A, Mlynarski J. Diastereoselective Hydrosilylation of N
-(tert
-Butylsulfinyl)imines Catalyzed by Zinc Acetate. European J Org Chem 2016. [DOI: 10.1002/ejoc.201501318] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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36
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Raheem Keeri A, Justyniak I, Jurczak J, Lewiński J. Quest for Efficient Catalysts based on Zinctert-Butyl Peroxides for Asymmetric Epoxidation of Enones:C2-vs C1-Symmetric Auxiliaries. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201500764] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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37
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Lafleur-Lambert R, Boukouvalas J. Asymmetric total synthesis of (+)-O-methylasparvenone, a rare nitrogen-free serotonin 2C receptor antagonist. Org Biomol Chem 2016; 14:8758-8763. [DOI: 10.1039/c6ob01678b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first enantioselective synthesis of the fungal metabolite (+)-O-methylasparvenone is reported.
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Affiliation(s)
| | - John Boukouvalas
- Department of Chemistry
- Pavillon Alexandre-Vachon
- Université Laval
- Quebec City
- Canada
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38
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Gajewy J, Szymkowiak J, Kwit M. Fine tuning of molecular and supramolecular properties of simple trianglimines – the role of the functional group. RSC Adv 2016. [DOI: 10.1039/c6ra06095a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Readily available chiral, triangular poly-azamacrocycles can act as receptors, low molecular weight supergelators and ligands in asymmetric synthesis.
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Affiliation(s)
- J. Gajewy
- Department of Chemistry
- Adam Mickiewicz University
- 61 614 Poznan
- Poland
- Wielkopolska Center for Advanced Technologies (WCAT)
| | - J. Szymkowiak
- Department of Chemistry
- Adam Mickiewicz University
- 61 614 Poznan
- Poland
- Wielkopolska Center for Advanced Technologies (WCAT)
| | - M. Kwit
- Department of Chemistry
- Adam Mickiewicz University
- 61 614 Poznan
- Poland
- Wielkopolska Center for Advanced Technologies (WCAT)
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39
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Escorihuela J, Burguete MI, Ujaque G, Lledós A, Luis SV. Mechanistic implications of the enantioselective addition of alkylzinc reagents to aldehydes catalyzed by nickel complexes with α-amino amide ligands. Org Biomol Chem 2016; 14:11125-11136. [DOI: 10.1039/c6ob01878e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The enantioselective alkylation of aldehydes catalysed by nickel(ii)-complexes derived from α-amino amides was studied by means of density functional theory (DFT) and ONIOM (B3LYP:UFF) calculations.
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Affiliation(s)
- Jorge Escorihuela
- Departamento de Química Inorgánica y Orgánica
- Universitat Jaume I
- 12071 Castellón de la Plana
- Spain
| | - M. Isabel Burguete
- Departamento de Química Inorgánica y Orgánica
- Universitat Jaume I
- 12071 Castellón de la Plana
- Spain
| | - Gregori Ujaque
- Unitat de Química Física
- Departament de Química
- Edifici Cn. Universitat Autònoma de Barcelona
- Barcelona
- Spain
| | - Agustí Lledós
- Unitat de Química Física
- Departament de Química
- Edifici Cn. Universitat Autònoma de Barcelona
- Barcelona
- Spain
| | - Santiago V. Luis
- Departamento de Química Inorgánica y Orgánica
- Universitat Jaume I
- 12071 Castellón de la Plana
- Spain
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40
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Bezłada A, Szewczyk M, Mlynarski J. Enantioselective Hydrosilylation of Imines Catalyzed by Chiral Zinc Acetate Complexes. J Org Chem 2015; 81:336-42. [PMID: 26667387 DOI: 10.1021/acs.joc.5b02613] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A series of zinc acetate complexes with optically pure diphenylethanediamine (DPEDA)-derived ligands have been employed as enantioselective catalyst for the hydrosilylation of various imines. High control of stereoselectivity (up to 97% ee) and excellent yields (up to 96%) were gained for a broad range of N-phosphinoylimines by using (R,R)-N,N'-dibenzyl-1,2-diphenylethane-1,2-diamine. This is the first successful application of an air-stable and environmentally friendly chiral Zn(OAc)2 complex instead of the previously used harmful diethylzinc in the asymmetric reduction of the C═N double bond.
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Affiliation(s)
- Agata Bezłada
- Faculty of Chemistry, Jagiellonian University , Ingardena 3, 30-060 Krakow, Poland
| | - Marcin Szewczyk
- Faculty of Chemistry, Jagiellonian University , Ingardena 3, 30-060 Krakow, Poland
| | - Jacek Mlynarski
- Faculty of Chemistry, Jagiellonian University , Ingardena 3, 30-060 Krakow, Poland
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41
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Naganawa Y, Komatsu H, Nishiyama H. Zinc-catalyzed Enantioselective Electrophilic Amination of β-Ketocarbonyl Compounds with Axially Chiral Phenanthroline Ligands. CHEM LETT 2015. [DOI: 10.1246/cl.150802] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Yuki Naganawa
- Department of Applied Chemistry, Graduate School of Engineering, Nagoya University
| | - Hiroyuki Komatsu
- Department of Applied Chemistry, Graduate School of Engineering, Nagoya University
| | - Hisao Nishiyama
- Department of Applied Chemistry, Graduate School of Engineering, Nagoya University
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42
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Szewczyk M, Stanek F, Bezłada A, Mlynarski J. Zinc Acetate-Catalyzed Enantioselective Hydrosilylation of Ketones. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500583] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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43
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Zhang B, Han F, Wang L, Li D, Yang D, Yang X, Yang J, Li X, Zhao D, Wang R. Catalytic Asymmetric Michael Reaction of 5H-Oxazol-4-Ones with α,β-Unsaturated Acyl Imidazoles. Chemistry 2015; 21:17234-8. [DOI: 10.1002/chem.201503105] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Revised: 10/02/2015] [Indexed: 12/24/2022]
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44
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Christmann M, Hu J, Kitamura M, Stoltz B. Tetrahedron reports on organic chemistry. Tetrahedron 2015. [DOI: 10.1016/s0040-4020(15)00744-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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45
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Thankachan AP, Asha S, Sindhu KS, Anilkumar G. An overview of Zn-catalyzed enantioselective aldol type C–C bond formation. RSC Adv 2015. [DOI: 10.1039/c5ra10102f] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Enantioselective zinc-catalyzed aldol reactions provide an efficient route for the construction of a wide range of carbon–carbon bond-formation, which are described here.
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Affiliation(s)
| | - S. Asha
- School of Chemical Sciences
- Mahatma Gandhi University
- Kottayam
- India 686560
| | - K. S. Sindhu
- School of Chemical Sciences
- Mahatma Gandhi University
- Kottayam
- India 686560
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46
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The Future of Catalysis by Chiral Lewis Acids. TOP ORGANOMETAL CHEM 2015. [DOI: 10.1007/3418_2015_141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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