Journal of the American Chemical Society, Vol.124, No.41, 12268-12274, 2002
Participation of the alpha,alpha'-diiminopyridine ligand system in reduction of the metal center during alkylation
The reaction of {[2,6-(i-Pr)(2)PhN=C(Me)](2)(C5H3N)}MnCl2 with alkylating agents formed a dinuclear Mn(I) derivative via ligand reductive coupling. In the case of the trivalent Cr analogue, a similar reaction afforded reduction toward Cr(II) but also alkylation at the pyridine ring para position followed by an unprecedented cycloaddition that generated a tricyclic system.