The kinetics of reaction of 2-, 6-, or 8-chloro-9-methylpurine with sodium ethoxide in ethanol reveal that, at 20掳, the 8-chloro-compound (I) is much more reactive than the 6-isomer, and that the 2-chloro-compound is the least reactive... Barlin,G. B. - 《Journal of the Che...
ChemInform Abstract: Chemoselective Reductions with Sodium Borohydride. Aldehydes vs. Ketones. When mixtures of the aldehydes (I) with the ketones (II) are treated with sodium boranate in ethanol/methylene chloride, the aldehydes (I) are selectively ... DE Ward,CK Rhee - 《Cheminform》 被引量...
Nor is there anything wrong with using magnesium metal to form a Grignard reagent. The only place where a mistake could have been made is in the choice of the solvent. The solvent that was used was ethanol (CH3CH2OH), whereas the usual solvent for a Grignard reagent is diethyl ether. ...
Copper hexacyanoferrate battery electrodes with long cycle life and high power. Nat. Commun. 2, 550 (2011). PubMed Google Scholar Vannerberg, N. G. The ESCA-spectra of sodium and potassium cyanide and of the sodium and potassium salts of the hexacyanometallates of the first transition ...
The calcium ethylate precursor is obtained by reacting elementary calcium with ethanol, the silicon precursor is then added to the stirred solution and condensation is being induced by the addition of water. A gel forms in a time range from a few minutes to a few hours, depending on the re...
To the best of our knowledge, this is the first highly enantioselective Michael addition reaction catalyzed by a chiral transition metal complex. Enantioselectivities ranging from 83 to 89% were obtained for the reaction of cyanoester with various vinyl ketones. The enantioselectivity depends slightly ...
Adenosylcobalamin (AdoCbl), a biologically active form of vitamin B12 (coenzyme B12), is one of the most complex metal-containing natural compounds and an essential vitamin for animals. However, AdoCbl can only be de novo synthesized by prokaryotes, and
The photocatalytic reaction (excitation wavelength, greater than 300 nm) of neat alcohols (ethanol or 2-propanol) by metal-loaded titanium(IV) oxide (TiO2) was conducted under argon at room temperature. The dehydrogenation products hydrogen (H2) and acetaldehyde (or acetone in the case of 2-pr...
presence of small amount of water. No Mannich base is observed in the absence of triphenyl phosphonium containing sulfonic acid based ionic liquid as Bronsted acidic ionic liquid (Fig. 10.52). Mannich reaction with TFA and PTSA in ethanol gave lower yield compared with Bronsted acidic ionic ...
All the samples were deposited on the abovementioned polished GC electrode with loading of 0.32 mg/cm2 and to avoid detachment of the powders from the GC electrode, Nafion ionomer (5 wt -% dispersion in ethanol and water) was applied as a binder. Then, in the course of the HER, N2 (...