Transition metal complexes in organic synthesis. Part 65: Iron-mediated synthesis of carazostatin, a free radical scavenger from Streptomyces chromofuscus, and O-methylcarazostatin

Highly efficient syntheses of the free radical scavenger carazostatin and its O-methyl derivative are described using cyclohexa-1,3-diene and 2-heptyl-4-methoxy-3-methylaniline as starting materials and iron-mediated oxidative cyclizations as key-steps.