One-Pot Synthesis of New Chiral Sulfides and Selenides Containing Oxazolidines: Catalyst in the Enantioselective Addition of Diethylzinc to Benzaldehyde - Braga, Antonio L; Rodrigues, Oscar E D; Paixão, Marcio W; Appelt, Helmoz R; Silveira, Claudio C; Bottega, Diana P (Synthesis, 2002)