Phenolic acids
Phenolic acids ( phenol carboxylic acids ) are aromatic chemical compounds, important groups are the hydroxybenzoic acids and hydroxycinnamic acids . This makes them phenols and, due to their carboxy group, also carboxylic acids .
Examples
The group of hydroxybenzoic acids includes, for example, gallic acid (R 1 = OH, R 2 = OH) and vanillic acid (R 1 = OCH 3 , R 2 = H). As hydrogenated gallic acid, i.e. H. Shikimic acid (R 1 = OH, R 2 = OH), which is an intermediate stage in the biosynthesis of aromatic amino acids, cannot be classified as phenol . In addition to these para-hydroxybenzoic acids, there are ortho-hydroxybenzoic acids such. B. salicylic acid .
The group of hydroxycinnamic acids includes, for example, ferulic acid (R 1 = H, R 2 = OCH 3 ) and caffeic acid (R 1 = H, R 2 = OH).
literature
- Bernhard Watzl, Gerhard Rechkemmer: Basic knowledge updated: Phenolic acids. In: Nutrition review. 48 2001 issue 10 (PDF; 58 kB)
Individual evidence
- ↑ Entry on phenol carboxylic acids. In: Römpp Online . Georg Thieme Verlag, accessed on June 14, 2014.