An efficient acidic functionalization of mesoporous silica LUS-1 (Laval University Silica) and its application as a recyclable heterogeneous catalyst in the synthesis of 2,4-diamino pyrimidine-5-carbonitriles via condensation reaction of aromatic aldehydes, malononitrile and guanidine carbonate in solvent-free condition has been reported. This green method offers a number of advantages such as short reaction time, good yields, simple work-up procedure, recyclable catalyst and environmentally friendly conditions.

One-pot synthesis of benzo[c]acridine derivatives via the three-component condensation reaction of aromatic aldehydes, 1-naphtylamine, and dimedone using sulfonic acid functionalized SBA-15 (SBA-Pr-SO3H) as nanoporous acid catalyst under solvent-free conditions was studied. This reaction is an efficient, green and environmentally friendly procedure.

Se estudió la síntesis de derivados de benzo[c]acridina mediante la condensación de tres componentes en un solo paso, de aldehídos aromáticos, 1-naftilamina y dimedona, empleando como catalizador el ácido sulfónico SBA-15 (SBA-Pr-SO3H) en condiciones libres de disolvente. Esta reacción es un método eficiente, verde y amigable al medio ambiente.