4-(2,5,6,6-Tetramethylcyclohex-2-enyl)but-3-en-2-on Chemische Eigenschaften,Einsatz,Produktion Methoden
S-S?tze Betriebsanweisung:
S23:Gas/Rauch/Dampf/Aerosol nicht einatmen(geeignete Bezeichnung(en) vom Hersteller anzugeben).
S24/25:Berührung mit den Augen und der Haut vermeiden.
Beschreibung
α-Irone has a characteristic orris and violet-like odor. The commercially prepared product corresponds generally to the α-isomer.
Chemische Eigenschaften
Yellowish liquid; Soluble in alcohol. A mixture of three isomers (α-, βand γ-irone).
Occurrence
Reported found in orris root, raspberry and flowers of Pittosporum sp
Verwenden
Perfumery, violet odor. The α isomer is also
used as a flavoring agent.
synthetische
By intramolecular thermal H-ene reaction of an allysilane.
Definition
ChEBI: A methyl ketone that is alpha-ionone in which a hydrogen at position 5 of the cyclohex-2-en-1-yl ring is substituted by a methyl group.
Allgemeine Beschreibung
Irone is a bioactive compound that is produced by an endophytic fungus in the rhizomes of
Iris germanica.
Synthese
Alpha-n-Methy lionone is synthesized by condensation of Methylethyl ketone with Citral, and cyclization of the resulting Pseudomethylionone. Cyclization may be carried out with Boron trifluoride or other agent.
l?uterung methode
If large amounts are available, then fractionate through a Podbielniak column (p 10) or an efficient spinning band column, but small amounts are distilled using a Kügelrohr apparatus. The 4-phenylsemicarbazone has m 174-175o (165-165.5o). [IR: Seidel & Ruzicka Helv Chim Acta 35 1826 1952, Naves Helv Chim Acta 31 1280 1948, Lecomte & Naves J Chim Phys 53 462 1956, Beilstein 7 IV 378.]
4-(2,5,6,6-Tetramethylcyclohex-2-enyl)but-3-en-2-on Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
