Phellandrene is the name for a pair of organic compounds that have a similar molecular structure and similar chemical properties. α-Phellandrene and β-phellandrene are cyclic monoterpenes and are double-bond isomers.
In α-phellandrene, both double bonds are endocyclic and in β-phellandrene, one of them is exocyclic. Both are insoluble in water, but miscible with ether.
The phellandrenes are used in fragrances because of their pleasing aromas. The odor of β-phellandrene has been described as peppery-minty and slightly citrusy.It is colorless to light yellow oily liquid with peppermint aroma. Right-handed body exists in cinnamon oil, ginger oil, elemi oil, cumin oil etc. Left-handed body exists in eucalyptus oil, star anise oil, gump couch oil, laurel oil, pepper oil, etc.
α-Phellandrene was named after Eucalyptus phellandra, now called Eucalyptus radiata, from which it can be isolated. It is also a constituent of the essential oil of Eucalyptus dives.
2-Methylundecanal is an organic compound that is found naturally in kumquat peel oil. This compound smells herbaceous, orange, and ambergris-like.
It is industrially prepared by the reaction of methylnonone or α-nonylacrolein with ethyl monochloroacetate in the presence of sodium ethanol. or can be obtained by cracking the corresponding glycidic acid.
Benzyl alcohol is a water-white liquid with a faint aromatic odor and a sharp burning taste.
In industry, it is used in the manufacture of other benzyl compounds, and in perfumery and flavoring. As a pharmaceutical product, it is used as an anti-parasite medication used to treat head lice. Benzyl alcohol is also used as a common preservative in many injectable drugs.
Perillyl Alcohol is a naturally occurring monoterpene related to limonene with antineoplastic activity.
Perillyl Alcoho industrially can be obtained by dehydration of β-epoxy-pinane into diol in the presence of mercury salts. or using β-Pinene as raw material to produce perilla acetate, and then Perilla alcohol was synthesized by saponification.
Citronellyl Nitrile is a clear colorless liquid with lemon and citrus odor. It is prepared by using citronellal as raw material to produce aldehyde oxime by oximation reaction, and then through heating dehydration in the presence of acetic anhydride. Citronellyl Nitrile is used extensively as a fragrance ingredient. Citronellyl Nitrile is the substitute of citronellal.
β-caryophylenol is an important tricyclic sesquiterpenoid alcohol, which can be widely used in fragrance and pharmaceutical manufacturing industries. At present, β-caryophylene is prepared from β-caryophylene by hydration reaction.
β-caryophyllene can be distilled from peppermint oil, Cloreoll, Copalhaoil, lavender oil, artemisiae artemisiae oil and Vitex vitex oil of Compositae. The sesquiterpenes of Pinus massoniana contain longifolene, β-caryophyllene, longleaf cycloene and pinene, and the content of β-caryophyllene is 13 to 17%.
Isoterpinolene is a p-menthane monoterpenoid. Which is distilled from turptentine oil.
Dehydroabietic acid, a colorless needle crystal, is an abietane diterpenic resin acid that is obtained from Pinus resin.
Eugenol Acetate occurs in clove oil, together with eugenol. It is a crystalline solid (mp 29°C) or yellowish liquid with a slightly fruity, clove odor.
Eugenol Acetate can be made by acetylation of eugenol with acetic anhydride.
Isoeugenol is a pale yellow oily liquid with a spice-clove odor. Occurs in ylang-ylang oil and other essential oils.
Isoeugenol is a phenylpropanoid that is an isomer of eugenol and KOH. It derives from a guaiacol.
Isopentyl salicylate, a colorless, sometimes slightly yellow, synthetic oil, C12H16O3, having an orchidlike odor.
It is obtained by fractionation after esterification of isopentanol and salicylic acid.
Agar, also called agar-agar, gelatin-like product made primarily from the red algae Gelidium and Gracilaria (division Rhodophyta).
Agar is isolated from the algae as an amorphous and translucent product, such as powder, flakes, or bricks.
Agar occurs as a complex cell-wall constituent containing the polysaccharide agarose with sulfate and calcium.
Veratraldehyde is a crystalline solid with a woody, vanillalike odor.
Veratraldehyde can be prepared by methylation of vanillin or by methylation of vanillin and dimethyl sulfate. It is also found in peppermint, ginger, raspberry, and other fruits.
It is used in oriental and warm, woody fragrances, as well as in flavor compositions for vanilla notes.
Myrac aldehyde is a colorless liquid with an aldehyde sweet odor. It made in the presence of Lewis acid, the diene addition reaction between myrcene and acrolein was catalyzed to obtain two mixtures of para-position and interposition.