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Journal articles on the topic 'Composite pyrazole'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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1

Huang, Yu-Ren, Chung-Te Chang Chien, and Cheng-Lung Chen. "A Molecular Dynamics Simulation Based Investigation of the Proton Conductivity of Anhydrous Pyrazole Doped Poly(Vinylphosphonic Acid) Composite System." Polymers 12, no. 12 (2020): 2906. http://dx.doi.org/10.3390/polym12122906.

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With the recognition of the multiple advantages of proton transport membranes that can operate under anhydrous conditions and offer promising opportunities as fuel cells working at high temperatures, a number of such membranes have been developed, but the proton transport mechanism of these materials has not been fully understood. In this work, a theoretical investigation based on molecular dynamics simulations is carried out on a system that is very similar to a real anhydrous proton transport membrane. The location and type of hydrogen bonds have been precisely identified by intermolecular p

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2

Yuan, Huijun, Yao Li, Hanhui Zhao, Zhihong Yang, Xin Li, and Wenjun Li. "Asymmetric synthesis of atropisomeric pyrazole via an enantioselective reaction of azonaphthalene with pyrazolone." Chemical Communications 55, no. 84 (2019): 12715–18. http://dx.doi.org/10.1039/c9cc06360a.

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The first catalytic asymmetric reaction of azonaphthalene with pyrazolone has been established. A wide range of axially chiral pyrazole derivatives have been achieved in good yields (68–99%) with excellent enantioselectivities (83–98% ee) by utilizing chiral phosphoric acid as a catalyst.

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3

Li, Ling, Zhen-Ting Liu, and Xiang-Ping Hu. "Copper-catalyzed propargylic [3+3] cycloaddition with 1H-pyrazol-5(4H)-ones: enantioselective access to optically active dihydropyrano[2,3-c]pyrazoles." Chemical Communications 54, no. 85 (2018): 12033–36. http://dx.doi.org/10.1039/c8cc05706k.

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A copper-catalyzed propargylic [3+3] cycloaddition with 1H-pyrazol-5(4H)-ones as C,O-bisnucleophiles through the desilylation-activated strategy has been developed. With the support of a chiral tridentate P,N,N-ligand, the reaction gave rise to a variety of optically active dihydropyrano[2,3-c]pyrazoles cyclohexadienone derivatives with up to 96% ee.

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4

Lintang, Hendrik O., Nur Azmina Roslan, Noratika Ramlan, Mustaffa Shamsuddin, and Leny Yuliati. "Photocatalyst Composites of Luminescent Trinuclear Copper(I) Pyrazolate Complexes/Titanium Oxide for Degradation of 2,4-Dichlorophenoxyacetic Acid." Materials Science Forum 846 (March 2016): 697–701. http://dx.doi.org/10.4028/www.scientific.net/msf.846.697.

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Here phosphorescent trinuclear copper (I) pyrazolate complexes ([Cu3Pz3]), synthesized from 3,5-dimethyl and 4-(3,5-dimethoxybenzyl)-3,5-dimethyl pyrazole ligands for complexes [Cu3Pz3]1 and [Cu3Pz3]2, were successfully impregnated into TiO2 with concentration of 0.1 mol%. These luminescent photocatalyst composites ([Cu3Pz3]1or 2/TiO2) gave 60% and 49% of dichlorophenoxyacetic acid (2,4-D) degradation after 1 h for [Cu3Pz3]1/TiO2 and [Cu3Pz3]2/TiO2, while TiO2 only showed 48%. The higher activity observed on [Cu3Pz3]1/TiO2 than the TiO2 would come from the efficient reduction of electron-hole

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5

Sabran, Nurul Husna, Leny Yuliati, Siew Ling Lee, and Hendrik Oktendy Lintang. "Systematic Study of Calcination Temperature on Photocatalytic Activity of Luminescent Copper(I) Pyrazolate Complex/Titanium Oxide Composites." Journal of the Indonesian Chemical Society 2, no. 1 (2019): 54. http://dx.doi.org/10.34311/jics.2019.02.1.54.

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Columnar assembly of luminescent 3,5-dimethyl pyrazolate complexes/titanium oxide composites with different metal ions has shown significant improvement in its photocatalytic activity for the removal and degradation of 2, 4-dichlorophenoxyacetic acid (2,4-D). Since photocatalytic activity of semiconductor titanium oxide (TiO2) with an anatase phase can be improved by calcination temperature, we report the effect of heat treatments on the preparation of copper(I) 3,5-dimethyl pyrazolate complex/titanium oxide composite ([Cu3Pz3]/TiO2) for the removal and degradation of 2,4-D. Photocatalyst comp

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6

Taidakov, I. V., A. N. Lobanov, S. A. Ambrozevich, and A. G. Vitukhnovskii. "Study of photophysical properties of composite materials based on polystyrene, polymethyl methacrylate, and Eu(III) complex with 1-(1,5-dimethyl-1h-pyrazole-4-yl)-4,4,4-trifluorobutane-1,3-dion and 1,10-phenanthroline." Bulletin of the Lebedev Physics Institute 39, no. 11 (2012): 320–24. http://dx.doi.org/10.3103/s1068335612110036.

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7

Kumari, Shweta, Amiya Shekhar, and Devendra D. Pathak. "Correction: Graphene oxide–TiO2 composite: an efficient heterogeneous catalyst for the green synthesis of pyrazoles and pyridines." New Journal of Chemistry 43, no. 42 (2019): 16767–68. http://dx.doi.org/10.1039/c9nj90145k.

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Correction for ‘Graphene oxide–TiO<sub>2</sub> composite: an efficient heterogeneous catalyst for the green synthesis of pyrazoles and pyridines’ by Shweta Kumari et al., New J. Chem., 2016, 40, 5053–5060.

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8

Kumari, Shweta, Amiya Shekhar, and Devendra D. Pathak. "Graphene oxide–TiO2 composite: an efficient heterogeneous catalyst for the green synthesis of pyrazoles and pyridines." New Journal of Chemistry 40, no. 6 (2016): 5053–60. http://dx.doi.org/10.1039/c5nj03380b.

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9

Sagar, S. S., and R. P. Chavan. "SiO2:MgMnO3: An Efficient Heterogeneous Catalyst for One Pot Synthesis of 1H-Pyrazolo[1,2-b]phthalazine-5,10-dione Derivatives." Asian Journal of Chemistry 32, no. 10 (2020): 2489–94. http://dx.doi.org/10.14233/ajchem.2020.22707.

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The present study deals with hydrothermal synthesis of SiO2 composite MgMnO3 catalyst. The obtained polycrystalline product was analyzed by using physical investigative techniques including XRD, SEM, EDAX, TEM, SAED and BET surface area. The product corresponded to average particle size of 100 nm by TEM images. The BET surface area was found 234.38 cm2/g for SiO2 composite MgMnO3 catalyst which indicates a good catalytic property. The synthesized catalyst was applied for the synthesis of 1H-pyrazolo[1,2-b]-phthalazine-5,10-dione in presence of ethanol as a solvent at 80 ºC. The current procedu

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10

Fu, Xinliang, Yankui Meng, Xiaofang Li, Marcin Stępień, and Piotr J. Chmielewski. "Extension of antiaromatic norcorrole by cycloaddition." Chemical Communications 54, no. 20 (2018): 2510–13. http://dx.doi.org/10.1039/c8cc00447a.

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11

Mazhar, Sana, Zahoor Ahmad, and Tashfeen Akhtar. "Optical and thermal studies of modified terephthaldehyde–acetone polymer." Polymers and Polymer Composites 28, no. 8-9 (2019): 572–78. http://dx.doi.org/10.1177/0967391119892365.

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Terephthaldehyde–acetone polymer was synthesized in an attempt to study its different structural and spectroscopic aspects along with thermal stability. The effect of modification was studied by introducing 4,5-dihydro-1 H-pyrazole ring in the polymer chain and silver nano particles (Ag NPs). The structural features of the polymer are supported by scanning electron microscope (SEM), Fourier transform infrared, and X-ray diffraction (XRD) studies. The modification of the polymer is indicated by the appearance of new absorption bands in infrared spectra, due to the formation of dihydropyrazole r

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12

Hamann, Jessica Nadine, and Felix Tuczek. "New catalytic model systems of tyrosinase: fine tuning of the reactivity with pyrazole-based N-donor ligands." Chem. Commun. 50, no. 18 (2014): 2298–300. http://dx.doi.org/10.1039/c3cc47888b.

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13

Liang, Qiuming, Kasumi Hayashi, Yimin Zeng, Jose L. Jimenez-Santiago, and Datong Song. "Constructing fused N-heterocycles from unprotected mesoionic N-heterocyclic olefins and organic azides via diazo transfer." Chemical Communications 57, no. 50 (2021): 6137–40. http://dx.doi.org/10.1039/d1cc02245h.

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14

Di Nicola, Corrado, Fabio Marchetti, Riccardo Pettinari, et al. "Tethering (Arene)Ru(II) Acylpyrazolones Decorated with Long Aliphatic Chains to Polystyrene Surfaces Provides Potent Antibacterial Plastics." Materials 13, no. 3 (2020): 526. http://dx.doi.org/10.3390/ma13030526.

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The acylpyrazolone proligands HQR (HQR in general, in detail: HQCy = 1-phenyl-3-methyl-4-carbonylcyclohexyl-5-pyrazolone, 4-C(O)-phenyl, HQPh = 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone, HQC17 = 1-phenyl-3-methyl-4-stearoyl-5-pyrazolone, HQC17,Ph = 1-phenyl-3-stearyl-4-benzoyl-5-pyrazolone) were synthesized and reacted with (arene)Ru(II) acceptors affording complexes [(arene)Ru(QR)Cl] (arene = cymene (cym) or hexamethylbenzene (hmb)). The complexes were characterized by elemental analyses, thermogravimetric analysis-Differntial Thermal Analysis (TGA-DTA), IR spectroscopy, ESI-MS and 1H, and 13C

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15

Taylor, Mercedes K., Martin Juhl, Gul Barg Hadaf, et al. "Palladium-catalyzed oxidative homocoupling of pyrazole boronic esters to access versatile bipyrazoles and the flexible metal–organic framework Co(4,4′-bipyrazolate)." Chemical Communications 56, no. 8 (2020): 1195–98. http://dx.doi.org/10.1039/c9cc08614e.

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16

Lu, Jian, Ling-Shan Luo, Feng Sha, Qiong Li, and Xin-Yan Wu. "Copper-catalyzed enantioselective alkynylation of pyrazole-4,5-diones with terminal alkynes." Chemical Communications 55, no. 77 (2019): 11603–6. http://dx.doi.org/10.1039/c9cc05252f.

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A copper-catalyzed enantioselective alkynylation between pyrazole-4,5-diones and terminal alkynes is developed, and both enantiomers of chiral propargylic alcohols can be achieved by using the ligand illustrated and its diastereomer.

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17

Mohammad, Khaja, Vikranth Thaltiri, Nagarjuna Kommu, and Anuj A. Vargeese. "Octanitropyrazolopyrazole: a gem-trinitromethyl based green high-density energetic oxidizer." Chemical Communications 56, no. 85 (2020): 12945–48. http://dx.doi.org/10.1039/d0cc05704e.

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Synthesis of a green gem-trinitromethyl-substituted high density energetic-oxidizer 3,6-dinitro-1,4-bis(trinitromethyl)-1,4-dihydropyrazolo[4,3-c]pyrazole with a potential to replace the presently utilized oxidizer ammonium perchlorate is reported.

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18

Niziol, J., A. Danel, G. Boiteux, et al. "Optical properties of new pyrazolo[3,4-b]quinoline and its composites." Synthetic Metals 127, no. 1-3 (2002): 175–80. http://dx.doi.org/10.1016/s0379-6779(01)00617-8.

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19

Pratiwi, D., D. Saprudin, and E. Rohaeti. "Synthesis of activated carbon-nanomagnetite-pyrazolone(1-phenyl-3-methyl-5-pyrazolone) composite as adsorbent for Cd2+." IOP Conference Series: Earth and Environmental Science 58 (March 2017): 012003. http://dx.doi.org/10.1088/1755-1315/58/1/012003.

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20

Faghihi, Khalil, Mohammad Naderi-Ghomi, and Mohsen Hajibeygi. "Synthesis and properties of new polyamide-organoclay nanocomposites containing pyrazine moiety in the main chain." Science and Engineering of Composite Materials 19, no. 3 (2012): 215–20. http://dx.doi.org/10.1515/secm-2011-0105.

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AbstractA series of polyamide (PA)/montmorillonite nanocomposites containing pyrazine moiety in the main chain were synthesized by a convenient solution intercalation technique. PA 3 as a source of polymer matrix was synthesized by the direct polycondensation reaction of pyrazine-2,3-dicarboxylic acid 1 with 4,4′-diaminodiphenyl sulfone 2 in the presence of triphenyl phosphite, CaCl2, pyridine, and N-methyl-2-pyrrolidone. The resulting nanocomposite films were characterized by Fourier transform infrared spectra, X-ray diffraction, scanning electron microscopy, and thermogravimetric analysis (T

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21

Al-Shuja’a, Omar M., Abeer O. Obeid та Ali G. El-Shekeil. "Spectral, Thermal and DC Electrical Conductivity of Charge Transfer Complex Formed Between 5,7-Dimethyl-1-oxo-2-phenyl-1H-pyrazolo [1,2-α]pyrazol-4-ium-3-olate and Iodine". Journal of Macromolecular Science, Part A 48, № 5 (2011): 355–64. http://dx.doi.org/10.1080/10601325.2011.562465.

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22

Zhang, Xian, Ming-Sheng Wang, Cai Sun, Chen Yang, Pei-Xin Li, and Guo-Cong Guo. "Stabilizing and color tuning pyrazine radicals by coordination for photochromism." Chemical Communications 52, no. 51 (2016): 7947–49. http://dx.doi.org/10.1039/c6cc03354g.

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23

Pünner, Florian, Yoshihiro Sohtome, and Mikiko Sodeoka. "Solvent-dependent copper-catalyzed synthesis of pyrazoles under aerobic conditions." Chemical Communications 52, no. 98 (2016): 14093–96. http://dx.doi.org/10.1039/c6cc06935e.

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24

Yang, Zi, Zhenyu Song, Lianghua Jie, Lianhui Wang, and Xiuling Cui. "Iridium(iii)-catalysed annulation of pyrazolidinones with propiolates: a facile route to pyrazolo[1,2-a] indazoles." Chemical Communications 55, no. 43 (2019): 6094–97. http://dx.doi.org/10.1039/c9cc02232e.

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25

Shi, Tao, Zhaoxiao Wu, Tingting Jia, et al. "Sequential [3+2] annulation reaction of prop-2-ynylsulfonium salts and hydrazonyl chlorides: synthesis of pyrazoles containing functional motifs." Chemical Communications 57, no. 68 (2021): 8460–63. http://dx.doi.org/10.1039/d1cc02735b.

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26

Ji, Ding-Wei, Fan Yang, Bing-Zhi Chen, et al. "Rhodium-catalyzed regio- and enantioselective allylic alkylation of pyrazol-5-ones with alkynes." Chemical Communications 56, no. 60 (2020): 8468–71. http://dx.doi.org/10.1039/d0cc04002a.

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27

Nieto, Sonia, Julio Pérez, Víctor Riera, Daniel Miguel, and Celedonio Alvarez. "Cationic fac-tris(pyrazole) complexes as anion receptors." Chem. Commun., no. 4 (2005): 546–48. http://dx.doi.org/10.1039/b414407d.

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28

Liu, Lu, Lei Li, Shukuan Mao, et al. "Synthesis of pyrazolo[1,5-c]quinazoline derivatives through the copper-catalyzed domino reaction of o-alkenyl aromatic isocyanides with diazo compounds." Chemical Communications 56, no. 55 (2020): 7665–68. http://dx.doi.org/10.1039/d0cc00594k.

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Various o-alkenyl aromatic isocyanides were prepared from readily available reactants for their double annulation with diazo compounds for a one-pot synthesis of pyrazolo[1,5-c]quinazolines under mild reaction conditions.

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29

Yuan, Hui, Jixi Guo, Dianzeng Jia, et al. "Photochromism of a pyrazolone derivative in crystalline state and in HPMC composite film." Photochemical & Photobiological Sciences 10, no. 10 (2011): 1562. http://dx.doi.org/10.1039/c1pp05110e.

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30

Mi, Pengbing, Jiajia Lang, and Shaojian Lin. "Retraction: Molybdenum-silver co-catalyzed cycloaddition of alkynes with N-isocyanoiminotriphenylphosphorane (NIITP): an efficient strategy for the synthesis of monosubstituted pyrazoles." Chemical Communications 55, no. 89 (2019): 13471. http://dx.doi.org/10.1039/c9cc90478f.

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Retraction of ‘Molybdenum-silver co-catalyzed cycloaddition of alkynes with N-isocyanoiminotriphenylphosphorane (NIITP): an efficient strategy for the synthesis of monosubstituted pyrazoles’ by Pengbing Mi et al., Chem. Commun., 2019, 55, 7986–7989.

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31

Katsiaouni, Stamatia, Sebastian Dechert, Christian Brückner, and Franc Meyer. "A versatile building block for pyrazole–pyrrole hybrid macrocycles." Chem. Commun., no. 9 (2007): 951–53. http://dx.doi.org/10.1039/b614049a.

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32

Camurlu, Pinar, Cemil Gültekin, and Vedat Gürbulak. "Optoelectronic Properties and Electrochromic Device Application of Novel Pyrazole Based Conducting Polymers." Journal of Macromolecular Science, Part A 50, no. 6 (2013): 588–95. http://dx.doi.org/10.1080/10601325.2013.784546.

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33

Phonsri, Wasinee, Barnaby A. I. Lewis, Guy N. L. Jameson, and Keith S. Murray. "Double spin crossovers: a new double salt strategy to improve magnetic and memory properties." Chemical Communications 55, no. 93 (2019): 14031–34. http://dx.doi.org/10.1039/c9cc07416c.

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The first example of a “double spin crossover” material, [Fe<sup>II</sup>(3,5-Me<sub>2</sub> tris(pyrazolyl)methane)(tris(pyrazolyl)methane)][Fe<sup>III</sup> azodiphenolate]ClO<sub>4</sub>·2MeCN was synthesised by reacting a spin crossover Fe<sup>II</sup> complex cation with a spin crossover Fe<sup>III</sup> complex anion.

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34

Zhu, Guanxin, Jiaxin Zhao, Tianbo Duan, Long Wang, and Dawei Wang. "Unsymmetrical Pyrazoly‐Pyridinyl‐Triazole Promoted High Active Copper Composites on Mesoporous Materials and Catalytic Applications." Asian Journal of Organic Chemistry 10, no. 8 (2021): 2213–19. http://dx.doi.org/10.1002/ajoc.202100310.

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35

Lempert, D. B., A. I. Kazakov, S. I. Soglasnova, I. L. Dalinger, and A. B. Sheremetev. "Energetic abilities of nitro derivatives of isomeric (pyrazol-3-yl)tetrazoles as components of solid composite propellants." Russian Chemical Bulletin 67, no. 9 (2018): 1580–88. http://dx.doi.org/10.1007/s11172-018-2261-x.

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36

Abdelhamid, Ahmed E., Ahmed A. El-Sayed, and Ahmed M. Khalil. "Polysulfone nanofiltration membranes enriched with functionalized graphene oxide for dye removal from wastewater." Journal of Polymer Engineering 40, no. 10 (2020): 833–41. http://dx.doi.org/10.1515/polyeng-2020-0141.

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AbstractComposite-nanofiltration membranes based on polysulfone (PSU) and functionalized graphene oxide (f-GO) were prepared for dye removal from aqueous media. Graphene oxide (GO) was introduced to enhance the performance of these membranes. GO was functionalized using an aminated heterocyclic compound, namely 6-amino-4-(4-nitrophenyl)-3-methyl-4-phenyl-4,7-dihydro-1H-pyrazolo-[3,4-b]pyridine-5carbonitrile. The f-GO was incorporated into the PSU membrane matrix in different weight ratios (0.25, 0.5, 1, 2 and 4 wt %). Characterizing the produced membranes with scanning electron microscope, Fou

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37

Noor, Tayyaba, Sadaf Pervaiz, Naseem Iqbal, et al. "Nanocomposites of NiO/CuO Based MOF with rGO: An Efficient and Robust Electrocatalyst for Methanol Oxidation Reaction in DMFC." Nanomaterials 10, no. 8 (2020): 1601. http://dx.doi.org/10.3390/nano10081601.

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In this work a novel bimetallic nickel oxide/copper oxide metal–organic framework (NiO/CuO MOF) has been developed by using two linkers: Benzene Dicarboxylic acid (BDC) and Pyrazine. The composites of NiO/CuO MOF with different amounts of reduced graphene oxide (rGO) were synthesized through a hydrothermal method and subsequently characterized by multiple significant techniques like XRD, SEM, EDX, FTIR and Raman IR for an investigation of their structural and morphological properties. The prepared series of material was later employed for electrochemical oxidation of methanol, tested by cyclic

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38

Yuan, Yong, Liang-Sen Li, Lin Zhang, et al. "Electrochemical synthesis of versatile ammonium oxides under metal catalyst-, exogenous-oxidant-, and exogenous-electrolyte-free conditions." Chemical Communications 57, no. 22 (2021): 2768–71. http://dx.doi.org/10.1039/d1cc00486g.

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39

Yang, Huimin, Xu Zhang, Guiyang Zhang, and Honghan Fei. "An alkaline-resistant Ag(i)-anchored pyrazolate-based metal–organic framework for chemical fixation of CO2." Chemical Communications 54, no. 35 (2018): 4469–72. http://dx.doi.org/10.1039/c8cc01461b.

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40

Lloyd, Gareth O., and Jonathan W. Steed. "Supramolecular assembly in a Janus-type urea system." Chem. Commun. 50, no. 12 (2014): 1426–28. http://dx.doi.org/10.1039/c3cc48603f.

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41

Snyder, Christopher J., Lucille A. Wells, David E. Chavez, Gregory H. Imler, and Damon A. Parrish. "Polycyclic N-oxides: high performing, low sensitivity energetic materials." Chemical Communications 55, no. 17 (2019): 2461–64. http://dx.doi.org/10.1039/c8cc09653h.

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42

Schäfer, Dominic, Fabian Fink, Denise Kleinschmidt, et al. "Enhanced catalytic activity of copper complexes in microgels for aerobic oxidation of benzyl alcohols." Chemical Communications 56, no. 42 (2020): 5601–4. http://dx.doi.org/10.1039/d0cc02433c.

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43

Voigt, Laura, René Wugt Larsen, Mariusz Kubus, and Kasper S. Pedersen. "Zero-valent metals in metal–organic frameworks: fac-M(CO)3(pyrazine)3/2." Chemical Communications 57, no. 32 (2021): 3861–64. http://dx.doi.org/10.1039/d1cc00864a.

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44

Yokoi, Hiroki, Naruhiko Wachi, Satoru Hiroto, and Hiroshi Shinokubo. "Oxidation of 2-amino-substituted BODIPYs providing pyrazine-fused BODIPY trimers." Chem. Commun. 50, no. 21 (2014): 2715–17. http://dx.doi.org/10.1039/c3cc48738e.

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45

Xiong, Biao, Shu-Di Zhang, Lu Chen, Bin Li, Huan-Feng Jiang, and Min Zhang. "An annulative transfer hydrogenation strategy enables straightforward access to tetrahydro fused-pyrazine derivatives." Chemical Communications 52, no. 70 (2016): 10636–39. http://dx.doi.org/10.1039/c6cc05329g.

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A ruthenium-catalyzed annulative transfer hydrogenation strategy, enabling straightforward access to tetrahydro fused-pyrazine derivatives from N-heteroaryl diamines and vicinal diols, is demonstrated.

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46

Su, M., María Tomás-Gamasa, S. Serdjukow, P. Mayer, and T. Carell. "Synthesis and properties of a Cu(ii) complexing pyrazole ligandoside in DNA." Chem. Commun. 50, no. 4 (2014): 409–11. http://dx.doi.org/10.1039/c3cc47561a.

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47

Abeykoon, Brian, Thomas Devic, Jean-Marc Grenèche, Alexandra Fateeva, and Alexander B. Sorokin. "Confinement of Fe–Al-PMOF catalytic sites favours the formation of pyrazoline from ethyl diazoacetate with an unusual sharp increase of selectivity upon recycling." Chemical Communications 54, no. 73 (2018): 10308–11. http://dx.doi.org/10.1039/c8cc06082g.

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48

Zhan, Shun-Ze, Jing-Hong Li, Guo-Hui Zhang, et al. "A luminescent edge-interlocked prismatic heteroleptic metallocage assembled through a ligand replacement reaction." Chemical Communications 55, no. 80 (2019): 11992–95. http://dx.doi.org/10.1039/c9cc05236d.

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A luminescent edge-interlocked heteroleptic metallocages based on Cu<sub>3</sub>(pyrazolate)<sub>3</sub> was prepared through a ligand replacement reaction from a homoleptic metallocage and a new ligand.

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49

Opoku-Temeng, Clement, Neetu Dayal, Delmis E. Hernandez, N. Naganna, and Herman O. Sintim. "Tetrahydro-3H-pyrazolo[4,3-a]phenanthridine-based CDK inhibitor." Chemical Communications 54, no. 36 (2018): 4521–24. http://dx.doi.org/10.1039/c8cc01154k.

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Wei, Shiqiang, Xiaoze Bao, Wenyao Wang, et al. "Enantioselective construction of dispirotriheterocycles featuring a 4-aminopyrazolone motif through a cascade Michael/cyclization process." Chemical Communications 56, no. 73 (2020): 10690–93. http://dx.doi.org/10.1039/d0cc04215c.

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Abstract:

A highly asymmetric approach to multicyclic dispiro [pyrazolone-pyrrolidinethione-oxindole] core structures bearing three contiguous stereogenic centers through a cascade Michael addition/cyclization reaction of 4-isothiocyanato pyrazolones with 3-ylideneoxindoles was developed.

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