4'-метоксиацетофенон

Химические свойства

WHITE CRYSTALS OR CRYSTALLINE POWDER

Вхождение

Reported found in European cranberry (Vaccinium oxycoccus L.), guava fruit (Psidium guajava L.), Vitis labrusca L., tomato, anise (Pimpinella anisum L.), mentha oils, grilled and roasted beef, sherry, cloudberry (Rubus chamaemorus L.), salted and pickled plums, Illicium verum and black chokeberry (Aronia melanocarpa ell.).

Использование

4'-Methoxyacetophenone is a solid, pale yellow flavoring agent with a hawthornlike odor. It is soluble in most fixed oils and propylene glycol, and it is insoluble in glycerin and mineral oil. It is obtained by chemical synthesis. This flavoring substance or its adjuvant may be safely used in food in the minimum quantity required to produce its intended flavor. It can be used alone or in combination with other flavoring substances or adjuvants. It is also termed p-methoxyacetophenone.

Подготовка

From anisole and acetyl chloride in the presence of aluminum chloride and carbon disulfide; from anisole and acetic acid in the presence of boron trifluoride.

Определение

ChEBI: A member of the class of acetophenones that is acetophenone substituted by a methoxy group at position 4.

Общее описание

4′-Methoxyacetophenone undergoes biocatalytic enantioselective reduction using immobilized Rhodotorula sp. AS2.2241 cells to yield (S)-1-(4-methoxyphenyl) ethanol in a hydrophilic ionic liquid-containing co-solvent system.

Профиль безопасности

Moderately toxic by ingestion. Human systemic effects by inhalation: pulse rate increase without fall in blood pressure and blood pressure elevation. A skin irritant. Flammable liquid. When heated to decomposition it emits acrid smoke and irritating fumes. See also KETONES.

Методы очистки

Crystallise the ketone from diethyl ether/pet ether. [Beilstein 8 IV 340.]