(Z)-2-(4-Nitro-benzyl-idene)-1-benzofuran-3(2H)-one.

In the crystal structure of the title compound, C(15)H(9)NO(4), weak C-H⋯O inter-actions generate rings with R(2) (2)(8) motifs. The supra-molecular aggregation is completed by the presence of C-H⋯O and van der Waals inter-actions.

Enantioselective nitroaldol (Henry) reaction using copper(II) complexes of (-)-sparteine.

The dichloro[(-)-sparteine-N,N']copper(II) complex provides Henry adducts with high enantioselectivities (73-97% ee) in Henry reaction between nitromethane and various aldehydes.