The reaction of 5,6-dihydro-4H-1,2-oxazines, which are derived from α-bromooximes and enamines, with ironcarbonylcomplexes such as Fe3(CO)12 and (C2H5)3NH[HFe3(CO)11] gives pyrrole derivatives in high yields, accompaning deoxygenation from the oxazines. The pyrroles are also obtained by an one-pot reaction using α-bromooximes, enamines and ironcarbonyls.