Search results
Results From The WOW.Com Content Network
It is usually prepared by the dehydration reaction of benzoic acid, e.g. using acetic anhydride: [3] 2 C 6 H 5 CO 2 H + (CH 3 CO) 2 O → (C 6 H 5 CO) 2 O + 2 CH 3 CO 2 H. Alternatively, sodium benzoate can be treated with benzoyl chloride. It can be produced by dehydrating benzoic acid by heating. [citation needed]
Salicylic acid has long been a key starting material for making acetylsalicylic acid (ASA or aspirin). [8] ASA is prepared by the acetylation of salicylic acid with the acetyl group from acetic anhydride or acetyl chloride. [17] ASA is the standard to which all the other non-steroidal anti-inflammatory drugs are compared. In veterinary medicine ...
Acetic anhydride, or ethanoic anhydride, is the chemical compound with the formula (CH 3 CO) 2 O. Commonly abbreviated Ac 2 O, it is the simplest isolable anhydride of a carboxylic acid and is widely used as a reagent in organic synthesis. It is a colorless liquid that smells strongly of acetic acid, which is formed by its reaction with ...
Hydroxybenzoic acid may refer to several related chemical compounds: 2-Hydroxybenzoic acid (salicylic acid, o-hydroxybenzoic acid) 3-Hydroxybenzoic acid (m ...
However other molecules can also be lost, such as ammonia, ethanol, acetic acid and hydrogen sulfide. [2] The addition of the two molecules typically proceeds in a step-wise fashion to the addition product, usually in equilibrium, and with loss of a water molecule (hence the name condensation). [3]
The systematic IUPAC name is not always the preferred IUPAC name, for example, lactic acid is a common, and also the preferred, name for what systematic rules call 2-hydroxypropanoic acid. This list is ordered by the number of carbon atoms in a carboxylic acid.
By using potassium hydroxide, 4-hydroxybenzoic acid is accessible, an important precursor for the versatile paraben class of biocides used e.g. in personal care products. The methodology is also used in the industrial synthesis of 3-hydroxy-2-naphthoic acid ; the regiochemistry of the carboxylation in this case is sensitive to temperature.
Benzoic acid is cheap and readily available, so the laboratory synthesis of benzoic acid is mainly practiced for its pedagogical value. It is a common undergraduate preparation. Benzoic acid can be purified by recrystallization from water because of its high solubility in hot water and poor solubility in cold water. The avoidance of organic ...