Confinement directed Photoreactivity of -Enaminones

Photolysis of beta-enaminones within the supramolecular cavity of octa acid leads to dihydropyran products. The supramolecular cavity can be recycled in a sustainable fashion through multiple cycles with sequential addtion of beta-enaminones leading to the products with moderate to good yields. The overall process involves the use of 20 mol% of supramolecularr host over 10 cycles.