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RISNANO PREYSSLER: AN EFFICIENT AND REUSABLE SOLID CATALYST FOR ESTERIFICATION OF AROMATIC ALCOHOLS
The esterification of salicylic acid with benzylic alcohols...
Synthesis of new series of α-cyclodextrin esters as dopamine carrier molecule
A new series of amphiphilic α-cyclodextrins were synthesized by grafting N-acylated amino acids [valine, leucine, phenylalanine, methionine, and tryptophan (3a–e)] to the primary hydroxyl groups via ester bond formation. ...
Comparison between the activity of nano-catalysts of Al-promoted and pure sulfated ziconia and optimization of condition in esterification of oleic acid
was investigated in esterification of oleic acid to FAME. Due to higher percents of the tetragonal phases of zirconia and the little particle size of Al2O3/S-ZrO2 than S-ZrO2, the catalyst showed higher catalytic activity. Then, the optimized conditions in FAME...
Microwave assisted the synthesis of ZnO and CuO promoted alumina for esterification reaction
of alumina with zinc and copper oxides and assessment of their activity in esterification of oleic acid to its methyl ester (biodiesel). The microwave solution combustion method is one of method for catalyst preparation which is very fast. The samples (pure...
A METHOD FOR THE ACETYLATION OF ALCOHOLS CATALYZED BY HETEROPOLYOXOMETALLATES
Esterifications of acetic acid with some linear, secondary, tertiary, and benzylic alcohols mediated by catalytic amounts of Keggin, Wells-Dawson, and Preyssler type heteropolyacids were carried out under reflux at mild reaction conditions with good...
Catalytic Application of Some Heteropolyacid Compounds in Esterification Reaction
, and then were characterized by UV-Vis and IR spectroscopy. Consequently, catalytic
application synthesized heteropolyacids were noticed in esterification of phthalic anhydride at
presence of 1-butanol. The reaction time and the amount of catalyst...
Catalytic Performance of Nano-SiO2-Supported Preyssler Heteropolyacid in Esterification of Salicylic Acid with Aliphatic and Benzylic Alcohols
An efficient and environmentally benign procedure for the catalytic esterification of salicylic acid with aliphatic alcohols, CnH2n+1OH (n = 1–5) and benzylic alcohols, RC6H4CH2OH (R = H, NO2, OCH3, Br, Cl, Me) was developed using nano-SiO2...
Preparation of Nano-Size Al-Promoted Sulfated Zirconia and the Impact of Calcination Temperature on Its Catalytic Activity
was examined by esterification reaction of oleic acid. XRD analysis revealed that a decline in the percentage of tetragonal phases of zirconia was observed by increasing the calcination temperature from 500 to 900 °C. In addition, a reduction of sulfate groups...
Fluorometric assay of lipase by some new synthetized fluorescein aralkyl esters
A series of fluorescein aralkyl esters were synthesized through esterification of fluorescein with carboxylic acids or acyl chlorides and applied to the fluorometric assay of lipase. The rate of spontaneous hydrolysis and enzymatic hydrolysis...
Preparation of alumina supported super active sulfated zirconia and assessment of its activity in esterification reaction
of aluminum sulfate octadecahydrate (AlSH) in the range of 15 to 30 and was characterized by XRD, FT-IR, BET surface area, TEM analysis and NaOH titration. Furthermore, the catalyst activity was determined by esterification reaction of oleic acid. The results...