Iron-Catalyzed Hydromagnesiation of Olefins

In 2012, three complementary iron-catalyzed methodologies for the hydromagnesiation of olefins have been developed. In each case, hydromagnesiation gives an alkyl, benzylic, or vinyl ­Grignard reagent that can be reacted with a variety of electrophiles to give functionalized products in good to excellent yields. The ­regio-, chemo-, and stereoselectivities of the reactions are evaluated.