K. Iseki et al., DIASTEREOSELECTIVE BROMODIFLUOROMETHYLATION OF CHIRAL IMIDE ENOLATES VIA INSERTION OF DIFLUOROCARBENE, Tetrahedron letters, 36(21), 1995, pp. 3711-3714
The bromodifluoromethylation of lithium enolates of chiral N-acyloxazo
lidinones via the insertion of difluorocarbene proceeds with good dias
tereomeric Excess (68-92% de).