Relevant bibliographies by topics / Pyrazole-4,5-diones

Academic literature on the topic 'Pyrazole-4,5-diones'

Author: Grafiati
Published: 6 September 2023

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Journal articles on the topic "Pyrazole-4,5-diones"

1

Warghude, Prakash K., Abhijeet S. Sabale, and Ramakrishna G. Bhat. "Access to highly enantioselective and diastereoselective spirooxindole dihydrofuran fused pyrazolones." Organic & Biomolecular Chemistry 18, no. 9 (2020): 1794–99. http://dx.doi.org/10.1039/d0ob00007h.

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2

Kumar, Krishna, Bhuvnesh Singh, Soumyadip Hore, and Ravi P. Singh. "Catalytic enantioselective synthesis of chiral 4-hydroxy 4′-substituted pyrazolones by the vinylogous aldol reaction of pyrazole-4,5-diones with 3-alkylidene-2-oxindoles." New Journal of Chemistry 45, no. 31 (2021): 13747–50. http://dx.doi.org/10.1039/d0nj05886f.

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3

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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4

Hamama, Wafaa S., Mohamed A. Ismail, Hana’a A. Al-Saman, and Hanafi H. Zoorob. "Convenient Selective Synthesis of Substituted Pyrido[2,3-d]pyrimidones and Annulated Derivatives." Zeitschrift für Naturforschung B 62, no. 1 (January 1, 2007): 104–10. http://dx.doi.org/10.1515/znb-2007-0115.

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The reaction of 6-aminouracil (1) with the appropriate α,β -unsaturated ketones, gave the corresponding pyrido[2,3-d]pyrimidin-2,4-diones 3, 6, 8 and 10, respectively. Treatment of 1 with salicylaldehyde, 6-carboethoxy-3,5-diphenyl-2-cyclohexenone (13) or 2,6- bis(phenylmethylidene)cyclohexanone (15) afforded the corresponding pyrimido[4,5-d]quinoline- 2,4-diones 12, 14 and 16, respectively. Furthermore, a pyrido[2,3-d]pyrimidine incorporating 3,2’- bis(quinoline) derivative 18 was synthesized. Annulation of pyrido[2,3-d]pyrimidine with pyrazole or imidazole moieties was achieved via reaction of 1 with benzylidene derivatives of pyrazolone, imidazolone or 3-carboethoxycoumarin (23) to give 21, 22 and 24, respectively.
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5

Wang, Rong‐Hui, Ya‐Ling Li, Hong‐Jiao He, You‐Cai Xiao, and Fen‐Er Chen. "Catalytic Asymmetric Addition of Diorganozinc Reagents to Pyrazole‐4,5‐Diones and Indoline‐2,3‐Diones." Chemistry – A European Journal 27, no. 13 (February 8, 2021): 4302–6. http://dx.doi.org/10.1002/chem.202005081.

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6

Enders, Dieter, Fabrizio Vetica, Pankaj Chauhan, Suruchi Mahajan, and Gerhard Raabe. "Asymmetric Organocatalytic Friedel–Crafts Hydroxyalkylation of Indoles Using Electrophilic Pyrazole-4,5-diones." Synthesis 50, no. 05 (December 7, 2017): 1039–46. http://dx.doi.org/10.1055/s-0036-1591860.

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The electrophilic reactivity of a series of novel pyrazole-4,5-dione derivatives in the organocatalytic Friedel–Crafts reaction with various substituted indoles has been tested. The disclosed procedure catalyzed by a cinchona alkaloid derivative allows the conjugation of two very important aza-heterocyclic scaffolds to generate a new class of indolylpyrazolones bearing a tetrasubstituted stereocenter in excellent yields (up to 99%) and with enantioselectivities of up to 94:6 er.
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7

Ray, Bidisha, and Santanu Mukherjee. "Direct Catalytic Enantioselective Vinylogous Aldol Reaction of Allyl Ketones to Pyrazole-4,5-diones." Journal of Organic Chemistry 83, no. 18 (July 19, 2018): 10871–80. http://dx.doi.org/10.1021/acs.joc.8b01566.

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8

Ray, Bidisha, Soumya Jyoti Singha Roy, and Santanu Mukherjee. "Noncovalent Catalysis for Enantioselective Direct Aldol Reaction of 3‐Acetylcoumarins to Pyrazole‐4,5‐diones." Asian Journal of Organic Chemistry 8, no. 7 (January 23, 2019): 1045–48. http://dx.doi.org/10.1002/ajoc.201800732.

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9

Antonov, D. I., M. V. Dmitriev, O. A. Kourova, and A. N. Maslivets. "Reaction of 4,5-Diaroyl-1H-pyrrole-2,3-diones with Thiosemicarbazide. Synthesis of 1H-Pyrazole-5-carboxamides." Russian Journal of Organic Chemistry 57, no. 12 (December 2021): 2063–66. http://dx.doi.org/10.1134/s1070428021120241.

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10

PIMENOVA, E. V., A. N. MASLIVETS, R. A. KHAMATGALEEV, and YU S. ANDREICHIKOV. "ChemInform Abstract: Five-Membered 2,3-Dioxoheterocycles. Part 42. Reaction of 1-Aryl-3- aroyl-4,5-dihydro-1H-pyrazole-4,5-diones with o-Phenylenediamine." ChemInform 28, no. 19 (August 4, 2010): no. http://dx.doi.org/10.1002/chin.199719168.

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