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Showing 1 to 20 of 36 for “"Acetic anhydride"”.
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The reaction of sodium on acetic anhydride
… for carrying out the reaction between sodium and acetic anhydride have been presented. Separation of reaction products and quantitative determination have been made easier by means of the improvements. 2. The only products isolated from either room-temperature or high-temperature runs have been …
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The reaction of sodium on acetic anhydride
… conditions for the reaction of sodium on acetic anhydride were used. 2. From the products of this reaction sodium acetate, diacetyl, and resin were found. 3. Negative results for the formation of vinyl acetate and ethylidene diacetate were obtained. 4. The small amount of hydrogen produced …
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A kinetic study of the reaction between acetic anhydride and isobutyl alcohol using a chemical oscillometer
… is to investigate the base catalyzed reaction of acetic anhydride and isobutyl alcohol reacting to form acetic acid and isobutyl acetate. In this investigation, a high frequency oscillometer is used to observe the progress of the reaction as it proceeds to the formation of products.</p><p>The …
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A kinetic study of the base catalyzed esterification of acetic anhydride with ethyl alcohol using a high frequency oscillometer
… rate of the base catalyzed esterification of acetic anhydride.
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A study of the catalytic effect of aluminum chloride in the condensation of acetic anhydride with benzine and phenol
Thesis (B.S.)--Michigan State College of Agriculture and Applied Science, 1924
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A kinetic study of the base catalyzed esterification of propionic anhydride with isopropyl and n-propyl alcohols using a high frequency oscillometer
… the base catalyzed reaction of propionic anhydride with n-propyl and isopropyl alcohols using a high frequency (120 megacycles) oscillometer to follow the course of the reaction as it proceeds.</p> <p>The high frequency oscillometer has been used for many types of analytical …
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Chemical modification of the surface of wool
… namely two commercially available polysuiphides, acetic anhydride, diethylpyrocarbonate, isocyanates and their water soluble bisuiphite adducts, acid and acid/formaldehyde solutions are applied to the surface of wool. The effects of these compounds on therate and extent of photoyellowing of wool …
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Development of asymmetric catalysts based on planar-chiral [pi]-complxes of nigrogen heterocycles with iron
… as a catalyst for acylation of alcohols with acetic anhydride, acylation of alcohols with diketene, cyanosilylation of aldehydes with triethylsilylcyanide, and addition of alcohols to ketenes. The DMAP analog was resolved by chiral HPLC, but resulted in a disappointing selectivity when used as …
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Synthesis and properties of some 4H-1, 3, 4 benzothiadiazines /|nby Darko J. Vukov. -- 260 St. Catharines, Ont. : [s. n.],
… to be satisfactory. Thiohydrazides react with acetic anhydride, in some cases, to give products identical with acetylthiohydrazides obtained from the hydrazidic halides with thioacetate ion at room temperature. In most of the cases thiohydrazides are found to give anomalous products on reaction …
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Synthesis of delta-1(9)-octalinols and their analogues
… ketone dienes 2 by reaction with mixtures of acetic anhydride-acetic acid-boron trifluoride proved unsuccessful. Two model compounds derived from hecogenin and incorporating the octalinol residue 1 were also prepared in the hope that the analogous ketone 2 might be obtained. This reaction, …
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A Synthesis and Characterization of D-Lyxo-Hexos-5-Ulose From D-Mannose.
… C-5 hydroxyl group with either methylsulfoxide/acetic anhydride or ruthenium tetraoxide/sodium periodate to methyl 2,3-0-isopropylidene-6-0-triphenylmethyl-α-D-lyxo-hexos-5-ulose. Mild acidic hydrolysis conditions cleaved the triphenyl- methyl group from 17 giving crystalline methyl …
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Lewis acid catalysis in organic synthesis
… liquids (TRIL). Acetylation reactions using acetic anhydride as the reagent proceed in excellent yields, in the presence of catalytic amounts (0.01 - 0.5 mol %) of Gd(OTf)₃, at ambient temperature. Acetylations of variety of aliphatic alcohols as well as phenols and amines were proceeded …
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Antimycobacterial, docking and molecular dynamic studies of pentacyclic triterpenes from Buddleja saligna leaves
… acid were subjected to derivatization with acetic anhydride in the presence of pyridine to obtain oleanolic acid-3-acetate and ursolic acid-3-acetate, respectively. The structures of these compounds were fully characterized by detailed nuclear magnetic resonance (NMR) investigations, which …
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Intermediate compounds in the synthesis of lignin
… aluminum chloride in both acetyl chloride and acetic anhydride. Other reactions have shown that a nitro group deactivates the benzene ring. This may be an explanation of the failure to get a Fries rearrangement or Friedel-Crafts addition.</p><p>This synthesis was not accomplished by this …
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Acing nucleic acids and chemistry : exogenous RNA/DNA acetylation and modeling universal data formats.
… the ability of three different pharmacons, acetic anhydride, acetylsalicylic acid, and sulfo-NHS acetate, to acetylate RNA and DNA. I then aim to determine the rate of the amide proton-solvent exchange rate of acetylated nucleic acids. Amide hydrogen/deuterium exchange has been studied on …
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Impurity profiling and synthesis of precursors to the hallucinogenic amphetamine DOB
… standards. Adaptation of the well‐known ‘phenylacetic acid route’ to synthesis of both 2,5‐P2P and 4‐Br‐2,5‐P2P, was found to provide low yields of the expected ketone products. Four impurities were isolated during the preparation of both ketones. The yield of one of these impurities (possessing …
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Extrusion performance and physicochemical characterization of texturized native and chemically modified whey proteins in carbohydrate-containing systems
… Esterification with n-propanol, acetylation with acetic anhydride and pH modification (5.4 and 8.5) were selected a alternative techniques to modify whey protein isolate (WPI). Modified and native WPI-corn starch blends were extruded at various process conditions of temperature (110-1700C); screw …
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Properties modification of nanopatterned surfaces functionalized with photo activated ligands
… the amine groups trough acetylation with acetic anhydride. With resolution from a few microns to a few hundred nanometers, I selectively passivated some areas of the ISAM film while others I left unaltered. I tested the effect of the acetic anhydride passivation by performing Horse Radish …
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Preparation of Substituted Enol Derivatives from Terminal Alkynes and Progress Toward the Total Synthesis of Nigricanoside A
… metallo-enolate may be trapped with benzoic anhydride, acetic anhydride, and TESOTf to generate E-trisubstituted enol esters and silanes. Traditional approaches to these types of olefins involve enolization of aldehydes; these methods are often inefficient and generally afford mixtures of …
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Development and application of calibration free techniques for reaction profiling
… pyridine catalysed esterification reaction of acetic anhydride and the vinyl acetate monomer process. These chemical systems are typically deficient in a priori information leading to the generation of a chemical or dynamic process model. The application of CFTs are favourable because they do …
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