Free Radical Scavenging Activity of Hydroxycinnamoyl Amino Acid Amides

摘要

The hydroxycinnamic acid compounds are an important source of antioxidants [1] due to their ubiquitous occurrence in the plant kingdom. They usually exist as esters of organic acid, glycosides, or amides. Only a small number of them exist as free acids in nature [2,3]. As the quantity of hydroxycinnamoyl amides in the nature is very low and their enzyme stability is higher than esters, we decided to synthesize series of cinnamoyl-, feruloyl-, caffeoyl- and sinapoyl- cysteine amides in order to define their antioxidant activity.