排序方式: 共有102条查询结果,搜索用时 0 毫秒
71.
Jinisha B. Anilkumar K. M. Manoj M. Ashraf C. Muhamed Pradeep V. S. Jayalekshmi S. 《Journal of Solid State Electrochemistry》2019,23(12):3343-3353
Journal of Solid State Electrochemistry - A solid-state supercapacitor is assembled using redox-mediated gel polymer as the electrolyte and separator and coconut shell–derived,... 相似文献
72.
Matsugi M Murata K Gotanda K Nambu H Anilkumar G Matsumoto K Kita Y 《The Journal of organic chemistry》2001,66(7):2434-2441
A novel sulfenylation method induced by aromatization of quinone mono-O,S-acetals is described. These sulfenylation reagents readily react with silyl enolethers or electron rich aromatic compounds to give sulfenylation products under mild conditions. In particular, O,S-acetal 2j, which possesses a pentafluorophenylthio function, is the most effective reagent from the standpoint of the adaptability for various substrates. 相似文献
73.
R. Anilkumar 《Journal of fluorine chemistry》2005,126(8):1174-1184
Dehydrofluorination of 1-aryl-1,2,2,2-tetrafluoroethanes (ArCHFCF3) and 1-aryl-1-chloro-2,2,2-trifluoroethane (ArCHClCF3) using lithiumhexamethyldisilazide (LHMDS) in tetrahydrofuran (THF) at room temperature produced 1,2,2-trifluorostyrene and 1-chloro-2,2-difluorostyrene, respectively, in very good isolated yields. Dehydrofluorination of 1,2,2,3,3,3-hexafluoro-1-phenyl-propane (PhCHFCF2CF3) and 1,2,2,3,3,4,4,4-octafluoro-1-phenyl-butane (PhCHFCF2CF2CF3) using LHMDS produced the corresponding substituted olefins (1-phenyl-1,2,3,3,3-pentafluoroprop-1-ene and 1-phenyl-1,2,3,3,4,4,4-pentafluorobut-1-ene) in good yield and high E-selectivity. Dehydrofluorination of 1-chloro-1-phenyl-2,2,3,3,3-pentafluoropropane (PhCHClCF2CF3) and 1-chloro-1-phenyl-2,2,3,3,4,4,4-heptafluorobutane (PhCHClCF2CF2CF3) produced a mixture of the corresponding E and Z olefins (PhCClCFCF3 and PhCClCFCF2CF3) in good yield. 相似文献
74.
The adsorption isotherms at 25, 45, and 65 degrees C of molybdenum solutions of concentration ranges between 10(-3) and 3x10(-2) M(Mo) (pH 4-5) on different alumina samples are investigated. The analysis is conducted using a modified Frumkin isotherm which takes a more realistic account of the lateral interaction between adsorbed species and considers that the adsorption takes place on the most basic OH groups on the surface of alumina. The results are discussed in view of the difference in solutions speciation, and the changes in the pH of the remaining supernatant solutions. The solution temperature, PZC of the used aluminas, the configuration of the basic OH groups on their surface, and the pore structure have been shown to intervene effectively. Copyright 2000 Academic Press. 相似文献
75.
Padinjare Veetil Saranya Mohan Neetha Sankaran Radhika Gopinathan Anilkumar 《Journal of heterocyclic chemistry》2021,58(3):673-684
Heterocyclic compounds are the ones that have always remained in the limelight owing to their superior contributions toward various disciplines such as biology, medicine, material science, pharmaceutical science, industry and so on. They form the building blocks of DNA and RNA macromolecules. Suitable tuning of these heterocyclic compounds can result in chemotherapeutic moieties with superlative efficiency. Seven-membered heterocyclic compounds are an important class of heterocyclic chemistry. Some of them are azepine, oxepine, thiepine, diazepine, thiazepine and so on. Transition metal-catalyzed synthesis of heterocycles has been the most explored in the recent past. Palladium is known as the best suitable catalyst for the same and that is the result of its excellent functional group tolerance and catalytic potency. Here, we intend to summarize the various investigations made on the palladium-catalyzed synthesis of seven-membered heterocycles. To the best of our knowledge, this is the first review in this topic and covers literature up to 2020. 相似文献
76.
Bianca Bitterlich Gopinathan Anilkumar Dr. Feyissa Gadissa Gelalcha Dr. Björn Spilker Dr. Anne Grotevendt Ralf Jackstell Dr. Man Kin Tse Dr. Matthias Beller Prof. Dr. 《化学:亚洲杂志》2007,2(4):521-529
The development of inexpensive and practical iron catalysts for the environmentally benign epoxidation of olefins with hydrogen peroxide as terminal oxidant is described. By systematic variation of ligands, metal sources, and reaction conditions, it was discovered that FeCl3?6H2O in combination with pyridine‐2,6‐dicarboxylic acid and different amines shows high reactivity and excellent selectivity towards the epoxidation of aromatic olefins and moderate reactivity towards that of aliphatic olefins. 相似文献
77.
Anilkumar R. Kore 《Tetrahedron letters》2009,50(7):793-257
A facile and efficient solid-phase synthesis of BrdU-14-UTP and BrdU-14-dUTP is reported. The method involves a nucleophilic addition of CPG-supported Br-dU with a 5′-carboxy modifier amidite, followed by the coupling with AA-UTP or AA-dUTP and finally the solid-support is cleaved under basic conditions. The newly prepared non-radioactive probes may have important applications in immunocytochemistry spatially in labeling and detection assays. BrdU moiety is coupled with nucleotides like dUTP and UTP and incorporated into nucleic acids using generally available polymerase like Taq polymerase or RNA polymerase. The probes thus generated can be used in standard blotting and hybridization procedures including in situ hybridization and detection with anti-BrdU conjugates. 相似文献
78.
Amar Dutt Pant S. Anilkumar Vandana Pulhani R. M. Tripathi D. N. Sharma 《Journal of Radioanalytical and Nuclear Chemistry》2014,300(1):89-92
The direct estimation of 90Sr by β counting from a mixture of other β and γ emitter is often difficult due to the efficiency variation among the β-emitters and the unknown nature of the sample. This paper deals with use of a combination of β and γ spectrometry measurements in estimating the activity of 90Sr, pure β emitter from a mixture of other β–γ emitters in water samples. This procedure offers a simple, easy to use, rapid and a reliable method for 90Sr estimation as an alternative to the tedious radiochemical separation procedure in this specific case. 相似文献
79.
The synthesis of a new series of peptidyl chloromethyl ketones such as MeOSuc-Ala-Ala-Pro-Ile-CH2Cl (AAPI) and MeOSuc-Ala-Ala-Ala-Pro-Ile-CH2Cl (AAAPI) is described. 相似文献
80.
Concise synthesis of 5-methyl-, 5-formyl,and 5-carboxy analogues of 2′-deoxycytidine-5′-triphosphate
We describe a concise and efficient synthesis of 5-methyl-, 5-formyl-, and 5-carboxy-analogues of 2′-deoxycytidine-5′-triphosphate which are well known for their various biological applications. A protection-free one-pot synthesis was used to convert 5-methyl-2′-deoxycytidine into 5-methyl-2′-deoxycytidine-5′-triphosphate in high yield. 5-Formyl-2′-deoxycytidine-5′-triphosphate was obtained upon photosensitized oxidation (UV-A irradiation, λ ∼365 nm) of an aerated aqueous solution of 5-methyl-2′-deoxycytidine-5′-triphosphate with the use of menadione as the photosensitizer. 5-Formyl-2′-deoxycytidine-5′-triphosphate was converted into 5-carboxy-2′-deoxycytidine-5′-triphosphate by using biphasic TEMPO/BAIB oxidation method in high yield. 相似文献