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Elena Arceo et al.
Nature chemistry, 5(9), 750-756 (2013-08-24)
Asymmetric catalytic variants of sunlight-driven photochemical processes hold extraordinary potential for the sustainable preparation of chiral molecules. However, the involvement of short-lived electronically excited states inherent to any photochemical reaction makes it challenging for a chiral catalyst to dictate the
Bruce S Ross et al.
Nucleosides, nucleotides & nucleic acids, 24(5-7), 815-818 (2005-10-27)
We describe an improved process to produce 2'-O-(2-methoxyethyl)-pyrimidines. Starting with commercially available O-2,2'-anhydro-5-methyluridine and tris-(2-methoxyethyl)borate, we modified the ring-opening reaction conditions and changed to a continuous extraction purification method to give 2'-O-(2-methaxyethyl)-5-methyluridine. The dimethoxytritylation 5'/3' ratios and yield were improved
Jun Gao et al.
Journal of hazardous materials, 130(1-2), 141-147 (2005-10-26)
The homogeneous catalytic N-oxidation of two picolines and two lutidines by hydrogen peroxide has been studied calorimetrically using a heat flow and power compensation SIMULAR reaction calorimeter. The objective of this work was to extend a previously developed kinetic model
Dongling Wu et al.
The journal of physical chemistry. A, 114(43), 11738-11745 (2010-10-07)
The reactivity of 2,6-lutidine/BR₃ and pyridine/BR₃ Lewis pairs (R = F, Me, C₆F₅) is investigated in detail by quantum chemical calculations. The observed reactivity difference of these pairs is interpreted in terms of the existence of a "frustrated complex" on
D S Van Meter et al.
Journal of chromatography. A, 1191(1-2), 67-71 (2008-03-07)
Utilizing linear solvation free energy relationship methodology, a novel pyridinium bromide surface confined ionic liquid (SCIL) stationary phase was characterized under normal phase high-performance liquid chromatographic conditions. A limited set of neutral aromatic probe solutes were utilized to rapidly assess
Laura Robaldo et al.
ChemMedChem, 9(9), 2172-2177 (2014-08-01)
The highly conserved untranslated regions of the hepatitis C virus (HCV) play a fundamental role in viral translation and replication and are therefore attractive targets for drug development. A set of modified DNAzymes carrying (2'R)-, (2'S)-2'-deoxy-2'-C-methyl- and -2'-O-methylnucleosides at various positions
Asymmetric fluorination of alpha-aryl acetic acid derivatives with the catalytic system NiCl2-Binap/R3SiOTf/2,6-lutidine.
Toshiaki Suzuki et al.
Angewandte Chemie (International ed. in English), 46(28), 5435-5439 (2007-06-15)
S R Agapova et al.
Molekuliarnaia genetika, mikrobiologiia i virusologiia, (5-6)(5-6), 10-13 (1992-05-01)
Arthrobacter crysallopoietes strain KM-4 degrading 2,6-dimethylpyridine and strain KM-4a degrading both 2,6-dimethylpyridine and pyridine, Arthrobacter sp. KM-4b degrading 2,4-dimethylpyridine were isolated from soil. Arthrobacter crystallopoietes KM-4 and Arthrobacter sp. KM-4b contain 100 Md plasmids pBS320 and pBS323. Arthrobacter crystallopietes KM-4a
Daniel Zewge et al.
Bioconjugate chemistry, 25(12), 2222-2232 (2014-11-15)
Chemical modification of siRNA is achieved in a high-throughput manner (96-well plate format) by copper catalyzed azide-alkyne cycloadditions. This transformation can be performed in one synthetic operation at up to four positions with complete specificity, good yield, and acceptable purity.
Electron-transfer mechanism in radical-scavenging reactions by a vitamin E model in a protic medium.
Ikuo Nakanishi et al.
Organic & biomolecular chemistry, 3(4), 626-629 (2005-02-11)
The scavenging reaction of 2,2-diphenyl-1-picrylhydrazyl radical (DPPH.) or galvinoxyl radical (GO.) by a vitamin E model, 2,2,5,7,8-pentamethylchroman-6-ol (1H), was significantly accelerated by the presence of Mg(ClO4)2 in de-aerated methanol (MeOH). Such an acceleration indicates that the radical-scavenging reaction of 1H
Kathryn A White et al.
Journal of colloid and interface science, 359(1), 126-135 (2011-04-22)
Using a system of modified silica particles and mixtures of water and 2,6-lutidine to form particle-stabilized emulsions, we show that subtle alterations to the hydration of the particle surface can cause major shifts in emulsion structure. We use fluorescence confocal
Meital Bloch et al.
International journal of pharmaceutics, 478(2), 504-516 (2014-12-02)
To increase colonoscopy capability to discriminate benign from malignant polyps, we suggest combining two imaging approaches based on targeted polymeric platforms. Water-soluble cationized polyacrylamide (CPAA) was tagged with the near infrared (NIR) dye IR-783-S-Ph-COOH to form Flu-CPAA. The recognition peptide
Qingnan Liu et al.
The journal of physical chemistry. A, 113(16), 4387-4396 (2009-03-24)
Collision rates and energy transfer distributions are reported for HOD with highly vibrationally excited 2-methylpyridine (2-picoline, E = 38 310 cm(-1)) and 2,6-dimethylpyridine (2,6-lutidine, E = 38 700 cm(-1)). High resolution transient IR absorption is used measured to complete product
Cyrille Costentin et al.
Journal of the American Chemical Society, 132(29), 10142-10147 (2010-07-06)
The effect of base pairing by cytosine on the electrochemical oxidation of guanine is examined by means of cyclic voltammetry on carefully purified reactants in a solvent, CHCl(3), which strongly favors the formation of an H-bonded pair. The thermodynamics and
Wensheng Yu et al.
Organic letters, 6(19), 3217-3219 (2004-09-10)
[reaction: see text] Oxidative cleavage of olefins by OsO(4)-NaIO(4) sometimes suffers from low yields due to the formation of side products. It is found that the addition of 2,6-lutidine can suppress the side reactions and dramatically improve the yield of
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