“…In 1984, Okamoto reported the hydration of styrenes using cobalt or iron complexes and NaBH 4 under air (Scheme , eq 1). − Quite recently, Beller and co-workers reported the synthesis of oximes from styrenes using a catalytic amount of iron phtalocyanine [Fe(Pc)] in the presence of NaBH 4 , and Boger and co-workers reported the hydration of trisubstitute olefins of vinblastine and β-citronellol using excess iron salts and NaBH 4 under air . A radical mechanism has been proposed for these reactions. ,, Nevertheless, an application of these methods using iron compounds and NaBH 4 to radical cyclizations has never been explored . Herein, we report iron-catalyzed redox radical cyclizations of 1,6-dienes using NaBH 4 (Scheme , eq 2) …”