Y. Nishibayashi et al., SYNTHESIS OF CHIRAL DIFERROCENYL DISELENIDES AND THEIR APPLICATION TOASYMMETRIC REACTIONS, Tetrahedron letters, 35(19), 1994, pp. 3115-3118
Two optically active diferrocenyl diselenides, each of which possesses
two chiral centers, were newly prepared from commercial 1-(dimethylam
ino)ethylferrocenes and applied to induce highly enantioselective sele
noxide elimination producing axially chiral allenecarboxylic esters.