1-Methyl-3-(2-oxyethyl)-1H-Imidazol-3-ium-Borate Sulfonic Acid ([MOEI]-BSA) was easily prepared and used as a new and highly efficient solid acid catalyst for the synthesis of benzimidazole derivatives with high isolated yields. Various substituted benzimidazoles were synthesized by a combination of o-phenylenediamines and aldehydes in the presence of [MOEI]-BSA with excellent yields in water a...

The methods of thermal analysis – thermogravimetry, differential were used to study the catalytic system phosphor-molybdenum heteropoly acid–aluminum oxide. It is shown that modification aluminum oxide has a direct effect on state acid. On surface ƞ-Al2O3, phosphomolybdic acid destroyed by interaction with strong Lewis’s sites carrier, while γ-Al2O3 it retains individuality, probably due multi...

in the present of methylimidazolium hydrogen sulfate, the synthesis of arylidene heterobicyclic pyrimidinones is studied by condensation of aromatic aldehyde, cyclopentanone, and urea or thiourea. using solvent-free conditions, non-toxic and inexpensive materials, simple and clean work-up, short reaction times and good yields of the products are the advantages of this method.

The synthesis of 2,2-dimethyloxepane frameworks based on the 7-endo-trig cyclization ene-diol using a catalytic amount metal catalysts (Au, Ag) or Bronsted acid (TfOH) has been developed. Also, spiro-type dioxabicyclic products were also derived from diene-diols. For condition catalysts, selectively reacted between 1,1,3-trisubstituted alkenes and alcohols to form frameworks. On other hand, TfO...

2,5 hexadione is produced from cellulose using ZrW in the presence of hydrogen while lactic acid is the main product in helium atmosphere. FTIR and kinetics studies strengthened the proposed mechanism which involves as important elementary steps hydroxyls abstractions and hydride transfers promoted by the Lewis acid sites of ZrW. Moreover the important increase of cellulose conversion in the pr...

Methyl benzoate (MB) compounds are prepared by reacting various benzoic acids with methanol using an acidic catalyst. In this study, the solid of zirconium metal solids fixed substances were studied. We determined that catalysts Ti had best activity. The catalytic synthesis a series MB titanium was direct condensation acid and metallic Lewis without other auxiliary Bronsted is reported for firs...

The conversion of used lubricating oil towards fuel by catalytic is a suitable way to recycle waste oil. Catalyst has key role in conversion. Therefore this research was study the cracking oil, and thus its properties as an alternative for over aluminum fosfate. experiments were carried out batch microreactor at temperature 350-400 oC, atmospheric initial air pressure, 5% w/w catalyst concentra...

Silica Vanadic Acid, SVA, (oxo-vanadium has been supported on silica) as a dual Lewis and Bronsted acid ability was prepared and efficiently catalyzed one-pot multi-component condensation of enolizable ketones or alkyl acetoacetates with aromatic aldehydes, acetonitrile and acetyl chloride. The described reaction was produced β-acetamido ketone or ester derivatives in high to excellent yields i...

A N-methyl-2-pyrrolidonium hydrogensulfate [NMP][HSO4] bronsted acidic ionic liquid-promoted cyclocondensation-cyclization pathway has been established using one pot reaction of anilines, aldehydes and mercaptoacetic acid to give 4-thiazolidinone derivatives in good promising yields microwave irradiation. Applications for this protocol are easy workup, high yields, short times, variability func...