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An ester of a carboxylic acid.R stands for any group (typically hydrogen or organyl) and R ′ stands for any organyl group.. In chemistry, an ester is a compound derived from an acid (organic or inorganic) in which the hydrogen atom (H) of at least one acidic hydroxyl group (−OH) of that acid is replaced by an organyl group (R ′). [1]
An ester of carboxylic acid.R stands for any group (organic or inorganic) and R′ stands for organyl group.. In chemistry, an ester is a compound derived from an acid (organic or inorganic) in which the hydrogen atom (H) of at least one acidic hydroxyl group (−OH) of that acid is replaced by an organyl group (−R).
"Etabonate" is an international nonproprietary name (INN) and United States Adopted Name (USAN) for pharmaceutical substances and is the name almost universally used in pharmacology. [1] some important drugs featuring that group are Loteprednol etabonate, a corticosteroid; Remogliflozin etabonate, an anti-diabetic drug
NHS esters are commonly used for protein modification (e.g. an NHS ester of fluorescein is commercially available, and can be added to a protein to obtain a fluorescently labeled protein in a straightforward reaction and purification step). NHS can be used with EDC to immobilize enzymes for biosensor applications. [4]
Parabens are chemical compounds that are commonly used as preservatives in cosmetic and pharmaceutical products. Chemically, they are a series of parahydroxybenzoates or esters of parahydroxybenzoic acid (also known as 4-hydroxybenzoic acid). Research is being conducted to evaluate the potential health implications of paraben usage.
Most typically, the reaction entails the use of methanol (MeOH) to give fatty acid methyl esters: RCO 2 CH 2 –CHO 2 CR–CH 2 O 2 CR + 3 MeOH → 3 RCO 2 Me + HOCH 2 –CHOH–CH 2 OH. FAMEs are less viscous than the precursor fats and can be purified to give the individual fatty acid esters, e.g. methyl oleate vs methyl palmitate.
Procainamide, an amide, has a longer duration of action than Procaine, an ester, because of the isosteric replacement of the ester oxygen with a nitrogen atom. [4] Procainamide is a classical bioisostere because the valence electron structure of a disubstituted oxygen atom is the same as a trisubstituted nitrogen atom, as Langmuir showed.
In synthetic chemistry, active esters include derivatives of nitrophenols and pentafluorophenol. Active esters are often used in peptide synthesis, e.g., N-hydroxysuccinimide, hydroxybenzotriazole. [1] Active esters of acrylic acid are precursors to polymers with reactive side chains. [4]