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Polyhydroxybenzenes are relatively electron-rich. One manifestation is the easy C-acetylation of pyrogallol. [6] Uses. It was once used in hair dyeing, dyeing of ...
Deoxygenation is a chemical reaction involving the removal of oxygen atoms from a molecule. The term also refers to the removal of molecular oxygen (O 2 ) from gases and solvents, a step in air-free technique and gas purifiers .
Hydrodeoxygenation (HDO) is a hydrogenolysis process for removing oxygen from oxygen-containing compounds. Typical HDO catalysts commonly are sulfided nickel-molybdenum or cobalt-molybdenum on gamma alumina.
The rate at which the reaction occurs is highly dependent upon the reaction conditions and the catalyst utilized. Though it is known that deoxygenation via deCO x generally proceeds at a higher rate with increased temperatures, undesired side reactions also increase in rate, which could lead to catalyst deactivation. The reaction route does not ...
The Markó–Lam deoxygenation is an organic chemistry reaction where the hydroxy functional group in an organic compound is replaced by a hydrogen atom to give an alkyl group. [ 1 ] [ 2 ] The Markó-Lam reaction is a variant of the Bouveault–Blanc reduction [ 3 ] and an alternative to the classical Barton–McCombie deoxygenation .
An increasing temperature has the most impact on the deoxygenation rate, and results in an increased critical deficit (), and decreases. Furthermore, a decreased D O s a t {\displaystyle DO_{sat}} concentration occurs with increasing temperature, which leads to a decrease in the DO concentration.
Oxophilic reagents are often used to extract or exchange oxygen centers in organic substrates, especially carbonyls (esters, ketones, amides) and epoxides. The highly oxophilic reagent generated from tungsten hexachloride and butyl lithium is useful for the deoxygenation of epoxides. [3] Such conversions are sometimes valuable in organic synthesis.
The Bamberger rearrangement is the chemical reaction of phenylhydroxylamines with strong aqueous acid, which will rearrange to give 4-aminophenols. [1] It is named for the German chemist Eugen Bamberger (1857–1932).