Results 11 to 20 of about 82,854 (283)

Bi-acylation of cellulose: determining the relative reactivities of the acetyl and fatty-acyl moieties [PDF]

, 2011
The global reaction between acetic anhydride and a fatty acid yields, at equilibrium, an asymmetric acetic-aliphatic anhydride in a medium containing finally: acetic-fatty anhydride, acetic anhydride, fatty acid, acetic acid and fatty anhydride.
Borredon, Marie-Elisabeth, Peydecastaing, Jérôme, Vaca-Garcia, Carlos   +2 more
core   +2 more sources

Preparation of Poly(oxybutyleneoxymaleoyl) Catalyzed by a Proton Exchanged Montmorillonite Clay

Molecules, 2004
The polycondensation of tetrahydrofuran with maleic anhydride catalyzed byMaghnite-H+ (Mag-H) was investigated. Maghnite is a montmorillonite sheet silicateclay that is exchanged with protons to produce Maghnite-H [1]. It was found that thepolymerization
Mohammed Belbachir, Mohammed Issam Ferrahi   +1 more
doaj   +1 more source

Quartz crystal microbalance-coated cellulose acetate nanofibers overlaid with chitosan for detection of acetic anhydride vapor

Results in Physics, 2019
Acetic anhydride is one of the most often used reagents in the production of heroin, and the detection of this compound in the air is a methodological challenge.
Doni B. Nugroho, Aditya Rianjanu, Kuwat Triyana, Ahmad Kusumaatmaja, Roto Roto   +4 more
doaj   +1 more source

Acetylation of Raw Cotton for Oil Spill Cleanup Application: an FTIR and 13-C MAS NMR Spectroscopic Investigation [PDF]

, 2004
Fourier transform infrared (FTIR) and 13C MAS NMR spectroscopy have been used to investigate the acetylation of raw cotton samples with acetic anhydride without solvents in the presence of different amounts of 4-dimethylaminopyridine (DMAP) catalyst ...
Adebajo, Moses, Frost, Raymond
core   +2 more sources

Synthesis and Characterization of Cellulose Acetate from TCF Oil Palm Empty Fruit Bunch Pulp

BioResources, 2014
Cellulose acetate (CA) was successfully synthesized by the acetylation of TCF cellulose pulp from oil palm empty fruit bunches (OPEFB) at room temperature, using acetic anhydride as the acetylating agent and acetic acid as the solvent in the presence of ...
Fauzi Muhammad Djuned, Mohammad Asad, Mohamad Nasir Mohamad Ibrahim, Wan Rosli Wan Daud   +3 more
doaj   +1 more source

Efficient Synthesis of α-Branched Purine-Based Acyclic Nucleosides: Scopes and Limitations of the Method

Molecules, 2020
An efficient route to acylated acyclic nucleosides containing a branched hemiaminal ether moiety is reported via three-component alkylation of N-heterocycle (purine nucleobase) with acetal (cyclic or acyclic, variously branched) and anhydride ...
Jan Frydrych, Lenka Poštová Slavětínská, Martin Dračínský, Zlatko Janeba   +3 more
doaj   +1 more source

Acetic anhydride–trifluoroacetic acid acetolysis for the estimation of glycerol in phosphatidyl choline by gas–liquid chromatography

Journal of Lipid Research, 1965
Low glycerol recoveries are obtained when acetic anhydride–acetic acid acetolysis is used to dephosphorylate lecithin prior to glycerol (and fatty acid) analysis by saponification–acetylation and gas–liquid chromatography.Quantitative glycerol recoveries
K.S. Holla, David G. Cornwell
doaj   +1 more source

The synthesis of polyfluoroalkyl substituted pyrroles as building blocks for obtaining fluorinated pyrrolidine-containing alkaloids

Журнал органічної та фармацевтичної хімії, 2020
Aim. To study the synthetic potential of cyclization of N-(β-polyfluoroacyl)vinyl derivatives of proline and N-substituted glycines into polyfluoroalkyl pyrroles, which are useful intermediates to fluorinated pyrrolidine alkaloids.
Anton A. Klipkov, Alexander E. Sorochinsky, Karen V. Tarasenko, Igor I. Gerus   +3 more
doaj   +1 more source

Comparison of six derivatizing agents for the determination of nine synthetic cathinones using gas chromatography-mass spectrometry [PDF]

, 2017
Six acylation reagents have been compared for their derivatisation potential towards nine synthetic cathinones by gas chromatography-mass spectrometry (GC-MS).
Alsenedi, Khalid A., Morrison, Calum
core   +1 more source

Synthesis Of L-Menthyl Acetic by Esterification L-Menthol and Acetic Anhydride with Variation Of Time

Al-Kimia, 2020
l-menthyl acetic is an ester with specific aroma that synthesized by reaction of l-menthol and acetic anhydride and useful in fragrance industry. This paper reports influenced variation of time reaction toward ester product and characteristics l- menthyl
Novia Suryani, A Ghanaim Fasya, Rurini Retnowati, Akyunul Jannah   +3 more
doaj   +1 more source