Enantioselective photoreduction of arylalkyl ketones via restricting the reaction to chirally modified zeolite cages

[GRAPHICS] Obtaining a high enantiomeric excess during a photoreaction within a zeolit e is hampered by the statistical distribution of reactant and chiral induct or molecules within the cages of a zeolite. By restricting the photoreactio ns to only those cages that contain both the reactant and a chiral inductor , one should be able to avoid reactions that yield racemic products. This a pproach is illustrated with the photoreduction of an arylalkyl ketone by a chiral inductor with an amino group.