Eugenol is obtained from fractional distillation of Clove oil. It is the main component in the Clove oil, comprising 72-90% of its total make-up. Eugenol is responsible for the aroma of Cloves. Clove oil as the raw material for eugenol synthesis is obtained by the distillation of Clove leaves
Isoeugenyl Acetate is prepared by acetylation of isoeugenol. Isoeugenyl Acetate can be used as flavoring agent (food & beverages),perfuming agent (aromatherapy, cosmetic & personal care) and in pharmaceutical.
Methyl isoeugenol is obtained by methylation of isoeugenol with methyl sulfate in alkaline solution. It is reported found in the oil of lemongrass, Asarum arifolium and in nearly 60 other essential oil. Methyl isoeugenol is colorless to pale yellow liquid with a spicy, clove, blossom, carnation and woody odor and a burning, bitter taste. It is used as flavoring and perfuming agents.
Methyl eugenol is prepared by methylation of eugenol. Naturally, it is present in many essential oil such as citronella oil, basil oil, bay oil and tea tree oil. Methyleugenol is a clear and colorless to pale yellow liquid with a spicy, carnation odor and bitter burning taste. It is used as a flavoring and perfuming agents, as an anaesthetic in rodent control, and as an insect attractant in some pesticide formulations.
Caryophyllene is a sesquiterpene widely distributed in essential oils of different spice and food plants, such as Clove, Oregano, Thyme and Cinnamon. Based on research studies carried out on clove bud oil, clove leaf oil, and clove stem oil from different parts of the world showed that caryophyllene is considered to be the second largest component of these tree types of clove oils after eugenol. It isolated from clove oil and separated from eugenol by treating the oil with 7% sodium carbonate solution, extracting with ether, repeating the carbonate treatment on the concentrated extracts, and finally steam distilling.
Isolation of Eugenol compound, and converting it into its derivatives is one of the methods to increase added-value of clove oil. One of Eugenol derivatives that has higher economic value, because of its benefit, is Isoeugenol. It can be synthesized from Eugenol through isomerization process with the aid of a catalyst and heat. Naturally, Isoeugenol occurs in many essential oils, usually in conjunction with eugenol, but not as the main component