Hydrocinnamic Acid
Phenylpropanoic acid or hydrocinnamic acid is a carboxylic acid with the formula C9H10O2 belonging to the class of phenylpropanoids. It is a white, crystalline solid with a sweet, floral scent at room temperature. Phenylpropanoic acid has a wide variety of uses including cosmetics, food additives, and pharmaceuticals. Preparation and reactions Phenylpropanoic acid can be prepared from cinnamic acid by hydrogenation. Originally it was prepared by reduction with sodium amalgam in water and by electrolysis. A characteristic reaction of phenylpropanoic acid is its cyclization to 1-indanone. When the side chain is homologated by the Arndt–Eistert reaction, subsequent cyclization affords 2-tetralone, derivatives. Uses Phenylpropanoic acid is widely used for flavoring, food additives, spices, fragrance, and medicines as it acts as a fixative agent, or a preservative. Food industry Phenylpropanoic acid is used in the food industry to preserve and maintain the original aroma qualit ...
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