Facile and Regioselective C–H Bond Activation of Aromatic Substrates by an Fe(II) Complex Involving a Spin-Forbidden Pathway
摘要:
The Fe(II) complex Cp*Fe(CO)(NCMe)Ph (Cp* = eta(5)-pentamethylcyclopentadienyl) is shown to mediate facile and highly regioselective C-H activation of aromatic substrates including benzene, furan, thiophene, thiazole, and 2-methylfuran. Experimental and computational evidence suggest a mechanism for C-H activation that involves NCMe dissociation, multiple spin intersystem crossings, C-H bond coordination, and C-H bond cleavage by a sigma-bond metathesis reaction.