1-(2-Naphthalinyl)ethanon Chemische Eigenschaften,Einsatz,Produktion Methoden
R-S?tze Betriebsanweisung:
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
R51/53:Giftig für Wasserorganismen, kann in Gew?ssern l?ngerfristig sch?dliche Wirkungen haben.
R22:Gesundheitssch?dlich beim Verschlucken.
R20/21/22:Gesundheitssch?dlich beim Einatmen,Verschlucken und Berührung mit der Haut.
S-S?tze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
S61:Freisetzung in die Umwelt vermeiden. Besondere Anweisungen einholen/Sicherheitsdatenblatt zu Rate ziehen.
S24/25:Berührung mit den Augen und der Haut vermeiden.
S22:Staub nicht einatmen.
S36/37:Bei der Arbeit geeignete Schutzhandschuhe und Schutzkleidung tragen.
Physikalische Eigenschaften
Methyl β-napthyl ketone has a floral, neroli odor suggestive of orange blossom and a strawberry-like flavor.
Chemische Eigenschaften
2-Acetonaphthone smells similar to
orange blossomand is a colorless crystalline solid (mp 56 °C). It is usually prepared
by Friedel–Crafts acetylation of naphthalene (with acetyl chloride, acetic anhydride,
etc.) in the presence of aluminumchloride. In polar solvents (e.g., nitrobenzene),
the percentage of the simultaneously formed ??-isomer is lower. Methyl
2-naphthyl ketone is used in eau de cologne, soap perfumes, and detergents. It
is a good fixative.
Verwenden
2-Acetonaphthone is a flavoring agent that is a crystalline solid (white or nearly white) with orange blossom-like odor. It is soluble in most fixed oils, slightly soluble in mineral oil and propylene glycol, and insoluble in glycerin. It is obtained by chemical synthesis.
Definition
ChEBI: 2-acetylnaphthalene is a naphthyl ketone that is naphthalene substituted at position 2 by an acetyl group.
synthetische
2-Acetonaphthone may be prepared by Friedel-Crafts reaction of naphthalene, acetyl chloride and AlCl3.
Allgemeine Beschreibung
2-Acetonaphthone undergoes efficient photoreduction in the presence of tri-
n-butylstannane as hydrogen donor. It is solubilized in air-saturated sodium dodecyl sulphate micelles in D
2O or H
2O by pulsed nitrogen laser photolysis for triplet sensitized production of singlet oxygen.
Sicherheitsprofil
Moderately toxic by ingestion. A human skin irritant. Flammable liquid. When heated to decomposition it emits acrid smoke and fumes
l?uterung methode
Separate it from the 1-isomer by fractional crystallisation of the picrate in EtOH (see entry for the 1-isomer above) to m 82o. Decomposition of the picrate with dilute NaOH and extraction with Et2O, then evaporation, give purer 2-acetylnaphthalene. If this residue solidifies, it can be recrystallised from pet ether, EtOH or acetic acid; otherwise it should be distilled in a vacuum and the solid distillate is recrystallised [Gorman & Rodgers J Am Chem Soc 108 5074 1986, Levanon et al. J Phys Chem 91 14 1987]. Purity should be checked by high field NMR spectroscopy. Its oxime has m 145o(dec), and the semicarbazone has m 235o. [Stobbe & Lenzer Justus Liebigs Ann Chem 380 95 1911, Raffauf J Am Chem Soc 72 753 1950, Hunsberger J Am Chem Soc 72 5626 1950, Immediata & Day J Org Chem 5 512 1940, Beilstein 7 IV 1294.]
1-(2-Naphthalinyl)ethanon Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
