We describe a concise entry to benzazocenols intermediates, e.g. I, for mitomycinoids via a homo-Brook rearrangement-ring opening sequence of a silylated aziridine, e.g. II. The latter is obtained by intramol. 1,3-dipolar cycloaddn. of an azide with an allylsilane, followed by irradn. of the resulting triazoline.