
Since its discovery, in the early 1930s, the chemistry of riboflavin has been studied in great detail. It is therefore surprising that several new flavin-mediated reactions have been discovered over the past few years. My lecture will focus on three reactions where riboflavin is used as a substrate in a biosynthetic pathway. These reactions are involved in riboflavin catabolism, Vitamin B12 biosynthesis and roseoflavin biosynthesis.