Abstract
A new iron-catalyzed chemoselective intramolecular hydroamination and hydroalkoxylation of the readily available alpha-allenic amines and alcohols to valuable unsaturated 5-membered heterocycles, 2,3-dihydropyrrole and 2,3-dihydrofinan, is reported. Effective selectivity control is achieved by a metal ligand cooperative activation of the substrates. The mild reaction conditions and the use of low amounts of an air and moisture stable iron catalyst allow for the hydrofunctionalization of a wide range of allenes bearing different functional groups in good yields in the absence of base or any sensitive additives.