The rearrangement of 1-naphthyl acetate in nitrobenzene solution, catalysed by aluminium chloride, to give 2- and 4-acetylnaphthol, appears to be intramolecular in nature. A mechanism to account for the experimental results is proposed. While the main product is the p -hydroxy-ketone, moderate ...
The mechanism for the photo-Fries rearrangement of phenyl acetate and biphenylyl acetates were reinvestigat- ed in phenol (or phenol derivatives) containing media. The results showed that the phenol (or phenol deriva- tives) which is the most common by-product of Fries reaction reacts with ...
Mechanistic studies in the photochemical Fries rearrangement of enol esters Photolysis of several enol esters produces the corresponding 1,3-Fries products, i.e. the keto forms of the 尾-diketones, as the sole primary photoproducts... V Dan,Y Mazur,E Fischer - 《Journal of the Chemical Socie...
the prices are relatively high.Polysiloxanes act in the condensed phase by promoting crosslinking and char formation.When burining,they transfer to PC surface and form a silicon-abundant layer.Isomerization and fries rearrangement of silicon-containing PC at high temperature promote cross linking and ...
This Fries rearrangement proceeded faster in chloroaromatic solvents (e.g., o-dichlorobenzene, p-chlorotoluene...doi:10.1002/chin.197206121L. DO AMARALM. P. BASTOSJohn Wiley & Sons, LtdChemischer Informationsdienst
This rearrangement is catalyzed by the hydrogen chloride and possibly by light ( cleavage of the bis-nitroso compound by A < 300 nm). Because of the low solubility of its hydrochloride the oxime escapes further reactions and falls out in oily drops or in solid colour less crystals. Under ...
The removal of acetaminophen (AAP) in aqueous solution by the UV/chlorine process was evaluated. The effect of chlorine dose, the initial AAP concentration
The Dio3 structure, in fact, indicates flexibility in the involved regions, which would allow such a rearrangement (Schweizer et al. 2014a). Both Cys residues thus might be able to react with the selenenyliodide first. From a structural point of view, a Cys168–Cys239 disulfide appears ...
A Study for probing the mechanism of acylation reactions and Fries rearrangement in polyphosphoric Acid(PPA)Chalcedonyheritage resourceslithic quarryingMiddle Stone AgemitigationNamaqualandSouth Africatechnological organisationMetals from K2 and Mapungubwe, middle Limpopo Valley : a technological...
Treatment of 4 with AlCl3 under Fries rearrangement conditions, only one acetyl group was rearranged to the para-position to afford calix[4]arene 5 with AABC substitution pattern at the upper rim of calix. The structure of chiral calix[4]arenes were confirmed based on NMR and mass spectra....