Results 21 to 30 of about 210,013 (270)
Nuclear Engineering and Technology, 2020 Cesium is a major product of uranium fission, which is the most commonly existed radionuclide in radioactive wastes. Various technologies have been applied to separate radioactive cesium from radioactive wastes, such as chemical precipitation, solvent ...
Jianlong Wang, Shuting Zhuang
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مجلة علوم ذي قار, 2019 This research includes the synthesis and characterization of Shiff's bases crown ethers prepared from condensation between cis-diaminodibenzo-18-crown-6 and benzaldehyde substituted with some groups such as; 4-H , 4-CH2(CH2)6CH 3 , 4-Cl , 4-Br and 4-NO2
Raed A. Aubed
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Chiral Crown Ethers Accessed from Catalytic Enantioselective Desymmetrization Reactions
, 2022 A diversity of unprecedented chiral aza-crown ethers were synthesized straightforwardly from readily available and inexpensive aza-crown ethers. Catalyzed by a chiral phosphoric acid, desymmetrization of an array of symmetric N-arylated aza-crown ethers ...
Yu-Qi Mao (13849556) +3 more
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Antimicrobial and Adjuvant Potencies of Di-n-alkyl Substituted Diazalariat Ethers
Antibiotics, 2023 Lariat ethers are macrocyclic polyethers—crown ethers—to which sidearms are appended. 4,13-Diaza-18-crown-6 having twin alkyl chains at the nitrogens show biological activity.
Mohit B. Patel +10 more
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Synthesis of Polymethyl Crown Ethers. A New Class of Lipophilic Crown Ethers [PDF]
Bulletin of the Chemical Society of Japan, 1982 Abstract A new class of lipophilic polymethyl crown ethers were synthesized from oligopropylene glycols via the intramolecular cyclization, and the stability constants of some complexes in methanol were determined.
Isao Ikeda +2 more
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Green Chemistry Letters and Reviews, 2017 In the presence of {[K.18-Crown-6]Br3}n, a unique tribromide reagent, trimethylsilyl (TMS) ethers, tetrahydropyranyl (THP) ethers, and alcohols were oxidized to their corresponding aldehydes and ketones in H2O2.
Mohsen Rasouli +3 more
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Indonesian Journal of Chemistry, 2017 The effect of macrocycle ring size on the corrosion inhibition efficiency of dibenzo-12-crown-4 (DB12C4), dibenzo-15-crown-5 (DB15C5), dibenzo-18-crown-6 (DB18C6), dibenzo-21-crown-7 (DB21C7) and dibenzo-24-crown-8 (DB24C8) have been elucidated by mean ...
Saprizal Hadisaputra +3 more
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Dibenzotetraaza Crown Ethers: A New Family of Crown Ethers Based on o-Phenylenediamine†
, 2016 Dibenzotetraaza (DBTA) crown ethers possess two o-phenylenediamine moieties. They are homologues of dibenzo crown ether phase-transfer catalysts and were prepared from the condensation of benzimidazoles with oligo(ethyleneglycol) dichlorides and oligo ...
Cynthia A. F. Striley (2676229) +3 more
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Molecules, 2014 N,N'-bis(bromobenzyl) and N,N'-bis(halopyridinyl) derivatives of diaza-12-crown-4, diaza-15-crown-5 and diaza-18-crown-6 ethers were synthesized in high yields.
Alexei A. Yakushev +6 more
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Crown Ethers and Analogs: Updates from the Chemistry of the Functional Groups
, 2010 This second book in the Patai Updates "mini series" relates to four chapters from the original Supplement E and to Supplement C. Coverage includes complexation of aryldiazonium ions by polyethers, complexes and selectivity of crown ethers, and structural
Laidler, Dale A. +9 more
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