An argument is presented which suggests that hydrolysis of the vinyl ether group of 1-methoxycyclooctene may occur by reversible proton transfer from a catalyzing acid to the 尾-carbon atom of the substrate, instead of by the conventional reaction mechanism in which this proton transfer is rate ...
Both stages of this process give substantial hydrogen ion isotope effects, for Stage I and for Stage II, and Stage I shows general acid catalysis in formic and acetic acid buffers; both stages are therefore assigned the conventional mechanism for vinyl ether hydrolysis involving rate-determining ...
A process for the preparation of the carotenoid Zeaxanthin by isomerization and optional hydrolysis of a carotenoid precursor with an alkaline reagent in a polar organic solvent selected from the group consisting of an ether, polyhydroxyl alcohol, an ether-alcohol or a combination thereof. Also ...
ChemInform Abstract: VINYL ETHER HYDROLYSIS. 16. 2‐CYCLOHEXYLIDENE‐3,3‐DIMETHYLOXETANEsolvolysis, hydrolysisNo abstract is available for this article.doi:10.1002/chin.198352073Y. CHIANGA. J. KRESGEW. F. WHITEH. MARSCHALLJohn Wiley & Sons, LtdChemischer Informationsdienst...
(10.3 g, 0.1 mol), and stirring was continued for 12 h at room temperature. The precipitated crystalline stannic chloride complex was filtered away from the solution, washed with ether, dried in the dark. Hydrolysis of the complex to benzaldehyde-D was accomplished upon addition to hot water...
The soluble amorphous poly(ketal ketone) was then quantitatively converted to high-molecular-weight, crystalline, insoluble PEK by acid-catalyzed hydrolysis under heterogeneous conditions. Due to relatively low reaction temperature, PEK prepared by this route had minimal defect structures (‘defect-free’...
reported to be 3.5 h and 4.6 days, respectively. Bioconcentration factors (BCFs) ranging from 30 to 114 in carp suggest that bioconcentration in aquatic organisms is moderate to high. Butyl ether is not expected to undergo hydrolysis in the environment due to the lack of hydrolyzable functional ...
535 Furthermore, complete depolymerization of the polymer backbone was achieved by hydrolysis with perchloric acid and the basic repeating units of the CMC chain (2,3,6-tri-, 2,3-; 2,6-; 3,6-di-, 2-; 3-; 6-mono-O-carboxymethyl glucose and glc) were separated by means of high-...
Molecular Weight: 156.14 MDL Number: MFCD00134013 MOL File: 9011-16-9.mol MSDS File: SDS Last updated:2025-01-27 09:38:02 Request For Quotation Poly(methyl vinyl ether-alt-maleic anhydride) Properties Density1.37 solubilityseveral organic solvents and in water upon hydrolysis: soluble ...
Purification Methods Ethyl vinyl ether (EVE) mainly contains impurities such as ethanol, acetaldehyde, and acetal and triethanolamine, which are added to prevent hydrolysis and must be refined before use. The purification is done by extensive washing with water or diluting potassium hydroxide solution...