Knowra Cinnamic acid Cinnamic acid Cinnamic acid is an aromatic carboxylic acid with a phenyl group attached to an unsaturated three-carbon chain. It occurs in plants and is used in fragrance, flavor, and chemical synthesis.
Carboxylic acid : An organic compound containing a carboxyl group, –COOH, which can donate a proton. Cinnamic acid belongs to this family through its terminal –COOH group.
Hydrogenation : A chemical reaction that adds hydrogen to a molecule, commonly reducing carbon–carbon double bonds. Hydrogenation converts cinnamic acid’s alkene into the saturated chain of hydrocinnamic acid.
Cinnamon : A spice made from the inner bark of trees in the genus Cinnamomum. Cinnamic acid’s name and natural occurrence are associated with cinnamon.
Cinnamyl alcohol : An aromatic alcohol with a three-carbon side chain, used in fragrances and flavorings. It is a fragrance ingredient accessible through reduction of cinnamic-acid derivatives.
trans-Cinnamic acid : The E geometric isomer of cinnamic acid, with the phenyl group and carboxyl group on opposite sides of the double bond. It is the common naturally occurring form and the usual meaning of cinnamic acid.
Phenyl group : A benzene ring acting as a substituent, with one hydrogen replaced by a bond to another group. This aromatic ring is attached to cinnamic acid’s three-carbon chain.
Hydrocinnamic acid : Aromatic carboxylic acid also called 3-phenylpropanoic acid, with a saturated three-carbon side chain. It is the product when cinnamic acid’s carbon–carbon double bond is hydrogenated.
Cinnamomum : A genus of evergreen trees and shrubs in the laurel family, including cinnamon-producing species. Species in this genus contain cinnamic acid and related aromatic compounds.
Methyl cinnamate : The methyl ester of cinnamic acid, occurring in some plants and used as a fragrance and flavor compound. It illustrates how esterifying cinnamic acid yields a useful scented ingredient.
cis-Cinnamic acid : The Z geometric isomer of cinnamic acid, with the phenyl group and carboxyl group on the same side of the double bond. Its geometry contrasts with the more stable trans form.
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