acetic anhydride
An efficient acetylation of dextran using in situ activated acetic anhydride with iodine
... Abstract: A facile, efficient, cost-effective and solvent-free acetylation method has been developed for the acetylation of dextran. Dextran acetates were suc- cessfully synthesized using different molar ratios of ...
9
Effect of wood acetylation with vinyl acetate and acetic anhydride on the properties of wood-plastic composites
... Chemical modifications of Scots pine (Pinus sylvestris) wood flour were performed with vinyl acetate (VA) and acetic anhydride (AA) in the presence of potassium carbonate as a catalyst. Scots pine wood ...
15
J. Braz. Chem. Soc. vol.26 número4
... with acetic anhydride, the reaction was screened in the presence of four commercial and two modified MS, which were dried under vacuum for 24 h at 100 °C prior to ...
10
Reaction of glycerol with acetic acid
... used acetic anhydride and triethylamine to synthesize solketalacetin that is not suitable for industrial process due to the cost of these materials, and health and safety ...
7
Determination of pentachlorophenol in drinking water
... All solvents used were of pesticide grade quality (Carlo Erba): n-hexane, and acetone. Acetic anhydride, anhydrous sodium sulfate and potassium carbonate were of analytical reagent grade (Merck). The PCP ...
4
J. Braz. Chem. Soc. vol.16 número3A
... A suspension of 25 mg of sulfated zirconia in acetonitrile HPLC grade (0.5 mL) was treated with 0.83 mmol of aldehyde and 2.50 mmol of acetic anhydride. The suspension mixture was stirred for the ...
5
J. Braz. Chem. Soc. vol.20 número2
... of acetic anhydride/pyridine (3:2) to the residues in an ultrasonic bath at 50 ºC during 40 ...(acetic anhydride and acetic anhydride/pyridine in the ratios of 1:1 and 4:1, ...
12
Simultaneous Quantification of Amphetamines and Ephedrines in Urine by GCMS using Analytical-Grade Acetic AnhydridePyridine as Derivatizing Reagents: a Suitable Approach to Reduce Costs of Routine Analyses
... as acetic anhydride, have been used owing to their prompt removal from the reaction ...acid anhydride is still present in the samples and is injected into the chromatograph inlet, it rarely causes ...
12
Amino acids as selective acylating agents: regioselective N-1-acylation of imidazolidin-4-one derivatives of the antimalarial drug primaquine
... with acetic anhydride, instead of BocGlyOH, as above ...neat acetic anhydride (20 equiv) under reflux, as described for the synthesis of 5-chloroarylidene derivatives of imidazoline-4-ones, 25 ...
6
J. Braz. Chem. Soc. vol.24 número1
... with acetic anhydride and evaluated for their in vitro antifungal activity against six Candida strains: Candida albicans (ATCC 90028 and LM V-42), ...
6
Mechanical properties of composites based on unsaturated polyester resins obtained by chemical recycling of poly(ethylene terephthalate)
... maleic anhydride and products of glycolysis, obtained by depolymerization of poly(ethyl- ene terephthalate) with dipropylene glycol (UPe1 resin) and triethylene glycol (UPe2 resin) in the presence of tetrabutyl ...
10
Visualization of early events in acetic acid denaturation of HIV-1 protease: a molecular dynamics study.
... Further, secondary structure calculation on the two trajectories [Figure 4(a) and 4(b)] reveals that even in the denaturing 9 M AcOH conditions, much residual secondary structure mainly as the b-sheet remains in PR. ...
7
J. Braz. Chem. Soc. vol.11 número5
... The reactions of triphenylphosphoranylidenesuccinic anhydride with amines, hydrazines and dipolar nitrogen nucleophiles were investigated, and a new method of synthesis of phosphonioum s[r] ...
5
Braz. J. Chem. Eng. vol.24 número2
... and acetic acid on the productivity of ...of acetic acid, a productivity of ...of acetic fermentation is ...an acetic acid concentration below ...
7
J. Braz. Chem. Soc. vol.23 número7
... In the research described here, the insights into the solution chemistry and the optimization of stable and wettable solutions are described by the combination of the following ligands: edta, ethylenediamine (eda), ...
9
Mat. Res. vol.20 número6
... The materials obtained by extrusion were quenched in water, pelletized, dried and injection-molded into standard tensile bars (ASTM D638 type I) and lexural specimens (ASTM D790) using an Arburg Allrounder 270V operating ...
8
The use of chemical modified chitosam with succinic anhydride in the methylene blue adsorption.
... SUCCINIC ANHYDRIDE IN THE METHYLENE BLUE ...succinic anhydride was compared with the traditional adsorbent active carbon by using the dye methylene blue, employed in the textile ...
6
Effect of acetic acid on rice seeds coated with rice husk ash
... of acetic acid, G showed a quadratic trend with the increase in acetic acid, while FCG showed a linear trend, with a decrease in the percentage of normal seedlings with increasing doses of acetic ...
5
Mat. Res. vol.17 número1
... behavior of a composite of curaua iber in a matrix composed of a biodegradable, aliphatic-aromatic co-polyester and poly(lactic acid), called BP. With respect to biodegradation in simulated soil, the authors found that ...
9
One-pot enzymatic resolutionseparation of enantiomers using green solvents
... 58 by adjusting other parameters, such as the temperature. An increase in concentration of the enzyme would speed the reaction, achieving a faster reaction without changing the enzyme selectivity. An adjustment in ...
121