Hydroacylation and C-N Coupling Reactions. Mechanistic Studies and Application in the Nucleoside Synthesis

In brief, from a reference synthesis at 230  C using TiCl 3 , 5,30 the temperature was decreased down to 180  C and/or TiO 2 anatase of two different sizes (25 and 200–300 nm) was

+ ,C=N, and –NH 2 groups were detected on the surface of the carbon (not specified), and a higher activity was obtained after platinum deposition up to 30 second treatment (S.Kim

In the previous sections we have shown how astronomical alignments and solar hierophanies – with a common interest in the solstices − were substantiated in the

At that moment, electrophoresis was stopped and the gel was stained using colloidal Coomassie (Fermentas). The piece of stained gel in which the sample was concentrated was excised

The crude mixture was concentrated under reduced pressure and the crude solid was purified by column chromatography on silica gel eluted with CHCl 3 /MeOH (10:1), affording 2.4 g

To a solution of this diastereomeric mixture (31.19 mmol) in acetone at 273 K was added the O-Ethylxanthic acid potassium salt (46.78 mmol) and the reaction was stirred at

The reaction mixture was diluted with AcOEt (50 mL) and washed with water (3 × 50 mL), dried (Na 2 SO 4 ) and concentrated in vacuo and the crude mixture was purificated by

The organic layer was separated, dried with MgSO 4 , the solvent evaporated to dryness and the residue purified by column chromatography (SiO 2 : DCM). The solvent