Asymmetric activation of racemic catalysts

In asymmetric catalytic reactions, racemic catalysts inherently give only r acemic products, whereas non-racemic catalysts generate non-racemic product s with or without a non-linear relationship. Conversely, we report herein a s an account a conceptually new strategy for asymmetric catalysis using rac emic catalysts wherein a chiral additive selectively activates. rather than de-activates one enantiomer of the racemic catalyst.