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Journal articles on the topic 'Synthesis of new ligands'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

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1

Abdullah, M. A. "Synthesis and Characterization of New Class of Mixed Polysulfide Ligands of Chromium (III) Complexes." Journal of Zankoy Sulaimani - Part A 5, no. 1 (2001): 1–10. http://dx.doi.org/10.17656/jzs.10084.

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2

Cordeiro, Suellem, Leticia Pereira, Marina de O. Simoes, and Maria de Fatima Marques. "Synthesis and Evaluation of New Bis(imino) Pyridine Based Catalysts for Ethylene Polymerization." Chemistry & Chemical Technology 10, no. 4 (2016): 413–21. http://dx.doi.org/10.23939/chcht10.04.413.

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Three-component catalytic systems based on 2,6-bis(imino) pyridine iron(II) chloride were synthesized from different ligands, which provided new alternative catalysts for polymerization of ethylene. The synthesized catalysts were characterized by Fourier transform infrared spectroscopy (FTIR), and the lack of absorption bands was observed in the region related to the carbonyl, as well as the presence of bands in the region of imino groups corresponding to C=N bonds. Coordination with Fe was also carried out. The structure of the ligands and the new catalysts were confirmed by the elemental ana

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3

Easson, Morag A. M., and David Parker. "Synthesis of new aza-thiophosphinate ligands." Tetrahedron Letters 38, no. 34 (1997): 6091–94. http://dx.doi.org/10.1016/s0040-4039(97)01375-0.

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4

Bampos, Nick, Leslie D. Field, Barbara A. Messerle, and Ronald J. Smernik. "Synthesis of new tetradentate oligophosphine ligands." Inorganic Chemistry 32, no. 19 (1993): 4084–88. http://dx.doi.org/10.1021/ic00071a019.

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5

Mo, Z., W. Yang, J. Gao, et al. "Synthesis of New Macrobicyclic Hexaamide Ligands." Synthetic Communications 28, no. 18 (1998): 3503–8. http://dx.doi.org/10.1080/00397919808004458.

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6

Tsotinis, Andrew, Maria Panoussopoulou, Sachi Sivananthan, and David Sugden. "Synthesis of new tricyclic melatoninergic ligands." Il Farmaco 56, no. 9 (2001): 725–29. http://dx.doi.org/10.1016/s0014-827x(01)01125-9.

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7

Mitu, Liviu, Natarajan Raman, Angela Kriza, Nicolae Stănică, and Mariana Dianu. "Template synthesis, characterization and antimicrobial activity of some new complexes with isonicotinoyl hydrazone ligands." Journal of the Serbian Chemical Society 74, no. 10 (2009): 1075–84. http://dx.doi.org/10.2298/jsc0910075m.

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Complexes of Cu(II), Ni(II), Co(II) with the 9-anthraldehyde isonicotinoyl hydrazone ligand (HL1) and the 3,5-di-tert-butyl-4-hydroxybenzaldehyde isonicotinoyl hydrazone ligand (H2L2) were synthesized by the template method. The complexes were characterized by analytical analysis, IR, UV-Vis and ESR spectroscopy, magnetic measurements, conductometry and thermal analysis and the two ligands by 1H-NMR spectroscopy. From the elemental analysis, 1:2 (metal:ligand) stoichiometry for the complexes of Cu(II), Ni(II) with the ligands HL1 and H2L2 and 1:1 (metal:ligand) stoichiometry for the complex of

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8

Ghesner, Ioan, Warren E. Piers, Masood Parvez, and Robert McDonald. "Synthesis and coordination chemistry of 2,2′-diboratabiphenyls." Canadian Journal of Chemistry 84, no. 2 (2006): 81–92. http://dx.doi.org/10.1139/v05-220.

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Dianionic 2,2′-diboratabiphenyl derivatives were prepared as a new class of binucleating ligands. Preliminary investigations into their coordination chemistry involved Rh complexes. Their solution and solid state structures were studied and confirm the preference for η6η6 coordination of the novel ligands, rendering them isoelectronic analogues of the ubiquitous bicyclopentadienyl system. Comparative studies suggest stronger donor properties for the fulvalene ligand as compared with the 2,2′-diboratabiphenyl system.Key words: dinucleating ligands, bimetallic complexes, rhodium complexes, boro

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9

Caputo, Christine A., Florentino d. S. Carneiro, Michael C. Jennings, and Nathan D. Jones. "Modular syntheses of oxazolinylamine ligands and characterization of group 10 metal complexes." Canadian Journal of Chemistry 85, no. 2 (2007): 85–95. http://dx.doi.org/10.1139/v06-188.

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The syntheses of aminoalkyloxazoline and pyrrolidinyloxazoline ligands, each of which bear a pair of chiral centres, by both known and new routes are reported. Variable temperature NMR studies show that the known stepwise syntheses of the pyrrolidinyl compounds are not complicated by epimerization; however, coordination of one of the aminoalkyl derivatives to Pt(II) under conditions of prolonged heating to 80 °C does give mixtures of diastereomeric N,N ′-chelated complexes that result from inversion of the chiral centre associated with the aminoalkyl fragment. A new synthesis of pyrrolidinylox

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10

Flores-Reyes, Julio C., José L. Sosa-Juárez, Mayra Sánchez-Serratos, et al. "Green Synthesis of Symmetric Dimaleamic Acids from Dianilines and Maleic Anhydride: Behind New Bidentate Ligands for MOFs." Chemistry Proceedings 3, no. 1 (2020): 92. http://dx.doi.org/10.3390/ecsoc-24-08379.

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We herein report the synthesis and characterization of six α,β-unsaturated dicarboxylic acid ligands with different phenyl spacers, and two ligands with a biphenyl and anthraquinone spacers. All these dimaleamic acids were synthesized in 16 to 99% yields via a base-catalyzed maleimide ring opening in water (ligand 2), or by a di-N-acylation from the corresponding diamines and maleic anhydride in acetic acid (ligands 4, 6, 8, 10, 12, 14 and 16). These reactions were performed using green solvents, while requiring minimal work up procedures, making them suitable alternatives to access these type

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11

Holakovský, Roman, Martin Hovorka, and Ivan Stibor. "Preparation of New Binaphthol-Based Tridentate Ligands for Enantioselective Synthesis." Collection of Czechoslovak Chemical Communications 65, no. 5 (2000): 805–15. http://dx.doi.org/10.1135/cccc20000805.

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A versatile method for resolution of 2,2'-dihydroxy-[1,1'-binaphthalene]-3-carboxylic acid has been developed. Four enantiomerically pure tridentate ligands, namely 3-(hydroxy- methyl)[1,1'-binaphthalene]-2,2'-diol (3), 3-[(2-hydroxyethoxy)[1,1'-binaphthalene]-2,2'-diol (4), 3-(2-hydroxy-5-methylbenzyl)[1,1'-binaphthalene]-2,2'-diol (5), and 3-(2-hydroxy-4,6-di-tert-butyl-benzyl)[1,1'-binaphthalene]-2,2'-diol (6), were synthesised in excellent yields and used as chiral modifiers of LiAlH4. A modest enantioselectivity was found for the reduction of acetophenone with LiAlH4 modified with ligand

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12

Tian, Zong-Qiang, James P. Donahue, and R. H. Holm. "Synthesis of New Types of Dithiolene Ligands." Inorganic Chemistry 34, no. 22 (1995): 5567–72. http://dx.doi.org/10.1021/ic00126a029.

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13

Abrunhosa, Isabelle, Mihaela Gulea, Jocelyne Levillain, and Serge Masson. "Synthesis of new chiral thiazoline-containing ligands." Tetrahedron: Asymmetry 12, no. 20 (2001): 2851–59. http://dx.doi.org/10.1016/s0957-4166(01)00481-5.

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14

Mo, Zunli, Wu Yang, Jinzhang Gao, Hong Chen, and Jingwan Kang. "Synthesis of Three New Macrocyclic Tetraamide Ligands." Synthetic Communications 29, no. 12 (1999): 2147–53. http://dx.doi.org/10.1080/00397919908086210.

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15

Ortego, J. Dale, L. Heffron, Y. Barroeta, and R. Delaune. "Synthesis and Complexes of New Multidentate Ligands." Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry 17, no. 10 (1987): 977–85. http://dx.doi.org/10.1080/00945718708059491.

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16

Flores-López, Lucia Z., Miguel Parra-Hake, Ratnasamy Somanathan, Fernando Ortega, and Gerardo Aguirre. "Synthesis of Some New Chiral Sulfonamide Ligands." Synthetic Communications 30, no. 1 (2000): 147–55. http://dx.doi.org/10.1080/00397910008087302.

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17

Chiririwa, Harry, and Ochieng Aoyi. "Synthesis and Characterization of New Tetradentate Ligands." Iranian Journal of Science and Technology, Transactions A: Science 41, no. 4 (2017): 1003–9. http://dx.doi.org/10.1007/s40995-017-0316-8.

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18

George, Sheby Mary, Hyo-Suk Kim, Myoung Soo Lah, Bo Keun Park, Chang Gyoun Kim, and Taek-Mo Chung. "Synthesis of new heteroleptic strontium complexes." Dalton Trans. 43, no. 38 (2014): 14461–69. http://dx.doi.org/10.1039/c4dt00689e.

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19

Pietrusiewicz, K., Katarzyna Szwaczko, Barbara Mirosław, Izabela Dybała, Radomir Jasiński, and Oleg Demchuk. "New Rigid Polycyclic Bis(phosphane) for Asymmetric Catalysis." Molecules 24, no. 3 (2019): 571. http://dx.doi.org/10.3390/molecules24030571.

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A simple, highly efficient synthesis of a series of novel chiral non-racemic rigid tetracyclic phosphorus ligands, applicable in important chemical asymmetric transformations, was performed. In a tandem cross-coupling/C-H bond activation reaction, a well-recognised and readily available ligand (R,R)-NORPHOS was used as the starting material. The palladium complexes of new ligands were obtained and characterised on the example of a crystalline dichloropalladium complex of [(1R,2R,9S,10S,11R,12R)-4-phenyltetracyclo[8.2.1.02,9.03,8]trideca-3,5,7-triene-11,12-diyl]bis(diphenylphosphane). A notably

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20

Nicolas, Emmanuel, Thibault Cheisson, G. Bas de Jong, Cornelis G. J. Tazelaar, and J. Chris Slootweg. "A new synthetic route to the electron-deficient ligand tris(3,4,5-tribromopyrazol-1-yl)phosphine oxide." Acta Crystallographica Section C Structural Chemistry 72, no. 11 (2016): 846–49. http://dx.doi.org/10.1107/s2053229616015035.

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The anionic tris(pyrazolyl)borates, or scorpionates, have proven to be extremely useful ligands. Neutral tris(pyrazolyl)methane ligands, however, are difficult to prepare and require numerous purification steps for a number of substitution patterns. We have previously outlined two different routes for accessing neutral tris(pyrazolyl) ligands. We describe here an adaptation of the previously published procedures for the synthesis of the electron-poor ligand tris(3,4,5-tribromopyrazol-1-yl)phosphine oxide, C9Br9N6OP. Similar electron-deficient ligands have been proven to unlock unique chemistry

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21

Lan, Wenlong, Zhen Zhou, Fu-Chao Jia, et al. "A new three-dimensional cobalt(II) coordination polymer based on V-shaped 3,4′-oxydibenzoate: synthesis, crystal structure and magnetic properties." Acta Crystallographica Section C Structural Chemistry 75, no. 7 (2019): 990–95. http://dx.doi.org/10.1107/s2053229619008337.

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A new coordination polymer (CP), namely poly[(μ-4,4′-bipyridine)(μ3-3,4′-oxydibenzoato)cobalt(II)], [Co(C14H8O5)(C10H8N2)] n or [Co(3,4′-obb)(4,4′-bipy)] n (1), was prepared by the self-assembly of Co(NO3)2·6H2O with the rarely used 3,4′-oxydibenzoic acid (3,4′-obbH2) ligand and 4,4′-bipyridine (4,4′-bipy) under solvothermal conditions, and has been structurally characterized by elemental analysis, IR spectroscopy, single-crystal X-ray crystallography and powder X-ray diffraction (PXRD). Single-crystal X-ray diffraction reveals that each CoII ion is six-coordinated by four O atoms from three 3

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22

Bell, Zöe R., Jon A. McCleverty, and Michael D. Ward. "New Multidentate Pyrazolyl - Pyridine Ligands—Synthesis and Structures." Australian Journal of Chemistry 56, no. 7 (2003): 665. http://dx.doi.org/10.1071/ch02251.

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Five new multidentate ligands have been prepared containing N,N-bidentate pyrazolyl–pyridine units linked to a central aromatic spacer unit. The ligands 3,3′-bis(3-{pyridin-2-yl}-pyrazol-1-yl-methyl)-p-terphenyl (1), 4,4′-bis(3-{pyridin-2-yl}-pyrazol-1-yl)biphenyl (2), and 1,8-bis(3-{pyridin-2-yl}-pyrazol-1-yl-methyl)naphthalene (3) have two bidentate arms and are therefore potentially tetradentate; 2,6-bis(3-{pyridin-2-yl}-pyrazol-1-yl-methyl)pyridine (4) has two bidentate arms with an additional nitrogen-donor in the aromatic spacer unit (a pyridyl group) and is therefore potentially pentade

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23

Alrazzak, Nour Abd, Suad T. Saad, and Nagham Mahmood Aljamali. "Synthesis, Characterization and Thermal Analysis for New Amoxil Ligands." Asian Journal of Chemistry 31, no. 5 (2019): 1022–26. http://dx.doi.org/10.14233/ajchem.2019.21822.

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In the present study, new heterocyclic organic ligands were synthesized using amoxil drug as a starting material through multi steps. The ligands were prepared through condensation reaction to form thiazole and imidazole derivatives containing azo or anil groups in their structures via azotization reaction and imination reaction. The new ligands of amoxil have been characterized by means of spectral (IR and 1H NMR) and thermal analyses.

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24

Murtagh, Kevin, Brian A. Sweetman, and Patrick J. Guiry. "New chiral tridentate ligands for asymmetric catalysis." Pure and Applied Chemistry 78, no. 2 (2006): 311–20. http://dx.doi.org/10.1351/pac200678020311.

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The synthesis of new tridentate, isoquinoline-derived ligands, involving successive Suzuki cross-coupling reactions, is described. We were able to resolve 1-[3-(2-hydroxy-phenyl)-isoquinolin-1-yl]-naphthalen-2-ol via molecular complexation with N-benzylcinchonidinium chloride, whereas 1,3-bis(2-hydroxy-naphthalen-1-yl)-isoquinoline was resolved by chromatographic separation of its epimeric camphorsulfonates. Their barrier to rotation about the central biaryl axis was evaluated via racemization studies. Application of enantiopure 1,3-bis(2-hydroxynaphthalen-1-yl)-isoquinoline in the addition of

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25

Szwaczko, Katarzyna, Barbara Miroslaw, Oleg M. Demchuk, Grzegorz Wójciuk, Liliana Mazur, and Kazimierz Michał Pietrusiewicz. "Metathetic approach to new NORPHOS-related bisphosphanes: facile synthesis and application in asymmetric hydrogenation." Pure and Applied Chemistry 93, no. 4 (2021): 409–26. http://dx.doi.org/10.1515/pac-2020-1205.

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Abstract A highly efficient synthesis of new chiral bisphosphanes derived from the renowned NORPHOS ligand is presented. The synthesis involves ring-opening metathesis of NORPHOS dioxide with an external olefin, followed by saturation of the new double bonds and adjustment of the oxidation level of phosphorus centers oxidation level. The synthesized bisphosphanes retain the configuration and enantiomeric purity of the starting NORPHOS. Their utility as ligands in asymmetric catalysis is exemplified using an open-NORPHOS ligand in some benchmark Rh-catalyzed hydrogenations of enamides where exc

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26

Zhang, Chuanlei, Han Hao, Zhenzhen Shi, and Hegen Zheng. "Four new metal–organic frameworks based on a rigid linear ligand: synthesis, optical properties and structural investigation." CrystEngComm 16, no. 25 (2014): 5662–71. http://dx.doi.org/10.1039/c4ce00224e.

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27

Gudasheva, Tatiana A., Olga A. Deeva, Andrey S. Pantileev, et al. "The New Dipeptide TSPO Ligands: Design, Synthesis and Structure–Anxiolytic Activity Relationship." Molecules 25, no. 21 (2020): 5132. http://dx.doi.org/10.3390/molecules25215132.

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The translocator protein (TSPO, 18 kDa) plays an important role in the synthesis of neurosteroids by promoting the transport of cholesterol from the outer to the inner mitochondrial membrane, which is the rate-limiting step in neurosteroidogenesis. Stimulation of TSPO by appropriate ligands increases the level of neurosteroids. The present study describes the design, synthesis and investigation of anxiolytic-like effects of a series of N-acyl-tryptophanyl-containing dipeptides. These novel dipeptide TSPO ligands were designed with the original drug-based peptide design strategy using alpidem a

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28

Viaud-Massuard, Marie-Claude, Daniel Mazéas, and Gérald Guillaumet. "Synthesis of New Melatoninergic Ligands Including Azaindole Moiety." HETEROCYCLES 50, no. 2 (1999): 1065. http://dx.doi.org/10.3987/com-98-s(h)111.

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29

Sasai, Hiroaki, Toshio Shinohara, Kazuhiko Wakita, Midori A. Arai, and Takayoshi Arai. "Synthesis and Character of New Bis- (isoxazoline) Ligands." HETEROCYCLES 59, no. 2 (2003): 587. http://dx.doi.org/10.3987/com-02-s57.

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30

Knollmüller, Max, Mathias Ferencic, Peter Gärtner, Kurt Mereiter, and Christian R. Noe. "New camphor derived chiral ligands for asymmetric synthesis." Tetrahedron: Asymmetry 9, no. 22 (1998): 4009–20. http://dx.doi.org/10.1016/s0957-4166(98)00410-8.

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31

Touafek, Ouassila, Ahmed Kabouche, and Zahia Kabouche. "New selective synthesis of 1,2-disubstituted ferrocenyl ligands." Journal of Chemical Research 2000, no. 11 (2000): 499. http://dx.doi.org/10.3184/030823400103165969.

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32

Ho, David E., Juan M. Betancort, David H. Woodmansee, Martin L. Larter, and Patrick J. Walsh. "Synthesis of new chiral tetradentate sulfonamide based ligands." Tetrahedron Letters 38, no. 22 (1997): 3867–70. http://dx.doi.org/10.1016/s0040-4039(97)00796-x.

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33

Kovganko, V. N., and N. N. Kovganko. "Synthesis of new metallomesogens with enaminoketone chelating ligands." Russian Journal of Organic Chemistry 42, no. 6 (2006): 907–11. http://dx.doi.org/10.1134/s1070428006060169.

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34

Devecİ, Pervİn, Emİne Özcan, Bİlge Taner, and Ömer Arslan. "Synthesis and complexation of two new phenylaminoglyoxime ligands." Journal of Coordination Chemistry 61, no. 6 (2008): 857–64. http://dx.doi.org/10.1080/00958970701439396.

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35

BAMPOS, N., L. D. FIELD, B. A. MESSERLE, and R. J. SMERNIK. "ChemInform Abstract: Synthesis of New Tetradentate Oligophosphine Ligands." ChemInform 24, no. 52 (2010): no. http://dx.doi.org/10.1002/chin.199352227.

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36

EASSON, M. A. M., and D. PARKER. "ChemInform Abstract: Synthesis of New Aza-thiophosphinate Ligands." ChemInform 28, no. 47 (2010): no. http://dx.doi.org/10.1002/chin.199747200.

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37

MO, Z., W. YANG, J. GAO, et al. "ChemInform Abstract: Synthesis of New Macrobicyclic Hexaamide Ligands." ChemInform 29, no. 50 (2010): no. http://dx.doi.org/10.1002/chin.199850187.

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38

Tsotinis, Andrew, Maria Panoussopoulou, Sachi Sivananthan, and David Sugden. "ChemInform Abstract: Synthesis of New Tricyclic Melatoninergic Ligands." ChemInform 33, no. 6 (2010): no. http://dx.doi.org/10.1002/chin.200206161.

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39

Richards, Christopher J., and Andrew W. Mulvaney. "Synthesis of phosphinoferrocenyloxazolines. New ligands for asymmetric catalysis." Tetrahedron: Asymmetry 7, no. 5 (1996): 1419–30. http://dx.doi.org/10.1016/0957-4166(96)00159-0.

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40

BATALINI, C., and W. F. DE GIOVANI. "SYNTHESIS AND CHARACTERIZATION OF A NEW RUTHENIUM (II) DIARSINIC AQUACOMPLEX." Periódico Tchê Química 16, no. 32 (2019): 130–38. http://dx.doi.org/10.52571/ptq.v16.n32.2019.148_periodico32_pgs_130_138.pdf.

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Ruthenium complexes are used as catalysts, energy converters, some have biological activity, among other applications. The ruthenium chemistry reserves remarkable stability when complexed with organic ligands, mainly bipyridine and tripyridine. Ruthenium polypyridine aquacomplexes have acted as excellent electrocatalysts in the conversion of organic substances, since they offer interesting patterns of binding with ruthenium. The preparation of ruthenium aquacomplexes combining tripyridine and bidentate arsine ligands is not officially described. Good advantages have been found when using ligan

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41

Polo-Cerón, Dorian. "Cu(II) and Ni(II) Complexes with New Tridentate NNS Thiosemicarbazones: Synthesis, Characterisation, DNA Interaction, and Antibacterial Activity." Bioinorganic Chemistry and Applications 2019 (July 1, 2019): 1–14. http://dx.doi.org/10.1155/2019/3520837.

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This paper reports the synthesis and detailed characterisation of copper(II) and nickel(II) complexes with tridentate thiosemicarbazone ligands H2L1 and H2L2 derived from 2-acetylpyrazine. The ligands and their metal complexes were characterised by different physicochemical techniques, including elemental and thermogravimetric analysis; UV-Vis, IR, 1H-NMR, and 13C-NMR spectroscopy; molar conductance measurements; and mass spectrometry. The crystal structure of the H2L1 ligand was determined by single crystal X-ray diffraction studies. The spectral data showed that the thiosemicarbazone behaves

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42

Grguric-Sipka, Sanja, Arbi Alshtewi, Dejan Jeremic, et al. "Synthesis, structural characterization and cytotoxic activity of two new organoruthenium(II) complexes." Journal of the Serbian Chemical Society 73, no. 6 (2008): 619–30. http://dx.doi.org/10.2298/jsc0806619g.

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Two new p-cymene ruthenium(II) complexes containing as additional ligands N-methylpiperazine ([(?6-p-cymene)RuCl2(CH3NH(CH2)4NH)]PF6, complex 1) or vitamin K3-thiosemicarbazone ([(?6-p-cymene)RuCl2(K3tsc)], complex 2) were synthesized starting from [(?6-p-cymene)2RuCl2]2 and the corresponding ligand. The complexes were characterized by elemental analysis, IR, electronic absorption and NMR spectroscopy. The X-ray crystal structure determination of complex 1 revealed ?piano-stool? geometry. The differences in the cytotoxic activity of the two complexes are discussed in terms of the ligand presen

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43

Gopal, Meera, and Sreesha Sasi. "Synthesis and Structural Characterization of Lanthanum(III) Complexes of 4-Nitrosoantipyrine." Asian Journal of Chemistry 33, no. 3 (2021): 617–21. http://dx.doi.org/10.14233/ajchem.2021.23047.

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A new series of La(III) complexes of the ligand with the general formula [La(L)2(a)3] and [La2(L)4(aa)3], (a = nitrate (1), thiocyanate (2), acetate (3) and propionate (4) ions, aa = sulphate (5), thiosulphate (6), oxalate (7) and malonate (8) ions with the ligand 4-nitrosoantipyrine (L) were synthesized and characterized using various physico-chemical studies. The primary ligand L acts as a bidentate ligand utilizing the carbonyl group and the nitroso group for bonding. The nitrate, thiocyanate, acetate and propionate ions are monovalent unidentate ligands, whereas sulphate, thiosulphate, oxa

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44

Kassim, Karimah, Muhamad Azwan Hamali, and Bohari Yamin. "A New Alternative Synthesis of Salicylaldazine via Microwave Irradiation Method." Journal of Chemistry 2019 (May 13, 2019): 1–6. http://dx.doi.org/10.1155/2019/9546373.

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Two diazine Schiff base ligands, HLa and HLb, derived from thiocarbohydrazide and salicylaldehyde derivatives were synthesized using the microwave-assisted synthesis approach. The confirmation of both ligands was elucidated through physiochemical and spectroscopy techniques as well as single X-ray crystallography diffraction. The analyses showed that the ligands synthesized were formed as azine instead of thiocarbohydrazone based on the missing thione, C=S moiety, throughout FTIR and NMR spectrascopic data. This finding was further concluded by X-ray crystal analysis. The biological properties

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45

Bandini, Marco, Pier Giorgio Cozzi, and Achille Umani-Ronchi. "Asymmetric synthesis with "privileged" ligands." Pure and Applied Chemistry 73, no. 2 (2001): 325–29. http://dx.doi.org/10.1351/pac200173020325.

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Different types of chiral "privileged" ligands 1 and 2 in promoting enantioselective addition of allylating agents to aliphatic and aromatic aldehydes are described. Here, a new concept in the asymmetric allylation reaction is presented. Redox [Cr (Salen) ] mediated addition of allyl halides to carbonyl compounds is described, and mechanistic investigations are discussed. These results open access to the fascinating area of the catalytic redox processes mediated by metallo-Salen complexes.

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46

Yu, Su, Constantinos Rabalakos, William D. Mitchell, and William D. Wulff. "New Synthesis of Vaulted Biaryl Ligands via the Snieckus Phenol Synthesis." Organic Letters 7, no. 3 (2005): 367–69. http://dx.doi.org/10.1021/ol047852e.

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47

Taj, Muhammad Babar, Muneera D. F. Alkahtani, Uzma Ali, et al. "New Heteroleptic 3D Metal Complexes: Synthesis, Antimicrobial and Solubilization Parameters." Molecules 25, no. 18 (2020): 4252. http://dx.doi.org/10.3390/molecules25184252.

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The microbial resistance to current antibiotics is increasing day by day, which in turn accelerating the development of new effective drugs. Several studies have proved the high antimicrobial potential of the interaction of several organic ligands with a variety of metal ions. In the present study, a conventional method has been adopted in the synthesis of twelve new heteroleptic complexes of cobalt (II), nickel (II), copper (II) and zinc (II) using three aldimines, namely, (HL1 ((E)-2-((4-chloro-2-hydroxybenzylidene)amino)-3,4-dimethyl-5-phenylcyclopent-2-en-1-one), HL2 ((Z)-3-((4-chlorobenzy

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Padevět, Jaroslav, Marcus G. Schrems, Robin Scheil, and Andreas Pfaltz. "NeoPHOX – a structurally tunable ligand system for asymmetric catalysis." Beilstein Journal of Organic Chemistry 12 (June 13, 2016): 1185–95. http://dx.doi.org/10.3762/bjoc.12.114.

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A synthesis of new NeoPHOX ligands derived from serine or threonine has been developed. The central intermediate is a NeoPHOX derivative bearing a methoxycarbonyl group at the stereogenic center next to the oxazoline N atom. The addition of methylmagnesium chloride leads to a tertiary alcohol, which can be acylated or silylated to produce NeoPHOX ligands with different sterical demand. The new NeoPHOX ligands were tested in the iridium-catalyzed asymmetric hydrogenation and palladium-catalyzed allylic substitution. In both reactions high enantioselectivities were achieved, that were comparable

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Arduini, Arturo, Marcella Bozzoli, Chiara Massera, Andrea Pochini, Andrea Secchi, and Franco Ugozzoli. "Synthesis of New Calix[4]arene-Based Ionophores." Collection of Czechoslovak Chemical Communications 69, no. 6 (2004): 1309–24. http://dx.doi.org/10.1135/cccc20041309.

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A synthesis of new calix[4]arene-based ionophores is reported. These ligands are characterized by the presence of two types of coordination sites on their lower rim: one crowning unit of different length, linking two proximal calix[4]arene phenolic oxygens, and two esters or amide groups acting as additional hard binding sites. The choice of the proper reaction conditions, such as the base counterion and the solvent polarity, during the functionalization of the macrocycle lower rim, allows to modulate the stereochemistry of the final ligands. In this way the ligands in cone and 1,2-alternate c

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Fan, Qikui, Hao Yang, Juan Ge, et al. "Customizable Ligand Exchange for Tailored Surface Property of Noble Metal Nanocrystals." Research 2020 (January 21, 2020): 1–12. http://dx.doi.org/10.34133/2020/2131806.

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It is highly desirable, while still challenging, to obtain noble metal nanocrystals with custom capping ligands, because their colloidal synthesis relies on specific capping ligands for the shape control while conventional ligand exchange processes suffer from “the strong replaces the weak” limitation, which greatly hinders their applications. Herein, we report a general and effective ligand exchange approach that can replace the native capping ligands of noble metal nanocrystals with virtually any type of ligands, producing flexibly tailored surface properties. The key is to use diethylamine

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