Author/Authors :
Antonio L Braga، نويسنده , , Helmoz R Appelt، نويسنده , , Paulo H Schneider، نويسنده , , Oscar E.D Rodrigues، نويسنده , , Claudio C Silveira، نويسنده , , Ludger A. Wessjohann، نويسنده ,
Abstract :
Several sulfur-containing optically active C2-symmetrical ligands have been synthesized from (R)-cysteine and applied successfully as chiral catalysts in the asymmetric addition of diethylzinc to aldehydes. The resulting secondary alcohols could be obtained in good yields and excellent enantiomeric excess.
Keywords :
disulfide , Catalyst , dialkylzinc , asymmetric ligand , cysteine
