2-(Dimethylamino)phosphinine: A Phosphorus-Containing Aniline Derivative

摘要

The yet unknown 2-amino-substituted lambda(3),sigma(2)-phosphinines are phosphorus-containing aniline derivatives. Calculations show that the strong interaction of the pi-donating NR2 group with the aromatic system results in a high pi-density at the phosphorus atom. We could now synthesize 2-N(CH3)(2)-functionalized phosphinines, starting from a 3-N(CH3)(2)-substituted 2-pyrone and (CH3)(3)Si-C equivalent to P. Their reaction with CuBr.S(CH3)(2) affords Cu-I complexes with the first example of a neutral phosphinine acting as a rare bridging mu(2)-P-4e donor-ligand between two Cu-I centers. Our experimental and theoretical investigations show that 2-aminophosphinines are missing links in the series of known 2-donor-functionalized phosphinines.