o-Aminoaryl ketones undergo smooth condensation with a-methylene ketones on the surface of silver heteropoly acid (Ag 3 PW 12 O 40 ) under mild reaction conditions to afford the corresponding polysubstituted quinolines in excellent yields with high selectivity. The catalyst can be recovered by simple filtration and can be recycled in subsequent reactions.

Room-temperature ionic liquids are found to be efficient catalysts in promoting three component-coupling reactions of aldehydes, amines and diethyl phosphite in solvent-free conditions to afford the corresponding a-aminophosphonates in high yields with high selectivity.

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Molecular iodine efficiently catalyzes the direct nucleophilic substitution of the hydroxy group of benzylic alcohols with carbon and oxygen nucleophiles.

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