A Cytochrome P450 Enzyme-Catalyzed Acetyl Migration in Cyanogramide Biosynthesis.
It is demonstrated that the cytochrome P450 monooxygenase CyaI catalyzes an oxidation reaction through a zwitterionic intermediate and facilitates a subsequent unusual C→N acetyl migration, which triggers a spontaneous intramolecular cyclization to forge the imidazolidin-4-one ring during 1 biosynthesis.