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A mild and efficient method has been developed for the preparation of 14-aryl-or 14-alkyl-14H-dibenzo[a,j]xanthenes from one-pot condensation of aldehydes with 2-naphthol using catalytic amount of Brønsted acidic ionic liquid ([TEBSA][HSO 4 ]) under thermal solvent-free conditions. Excellent yields, short reaction times, easy workup and reusability of the catalyst as well as solventfree conditions are advantages of this procedure.

A mild and efficient method has been developed for the preparation of Į-amino nitriles from the condensation of aldehydes and ketones with aniline and TMSCN in the presence of a catalytic amount of Zr(HSO 4 ) 4 under solvent-free conditions at room temperature.

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