Novel bifunctional mesoporous catalysts based on preyssler heteropolyacids for green pyrrole derivative synthesis

SATHICQ, ÁNGEL; DE GERONIMO, EDUARDO; PORTILLA-ZÚÑIGA, OMAR; ROJAS, HUGO; ROMANELLI, GUSTAVO P.; PORTILLA-ZÚÑIGA, OMAR; ROJAS, HUGO; ROMANELLI, GUSTAVO P.; MARTÍNEZ, JOSÉ; LUQUE, RAFAEL; MARTÍNEZ, JOSÉ; LUQUE, RAFAEL; SATHICQ, ÁNGEL; DE GERONIMO, EDUARDO

Catalysts

MDPI AG

Lugar: Basilea; Año: 2018 vol. 8 p. 1 - 20

In this paper, we report the synthesis of Preyssler heteropolyacids supported on mesoporous alumina in order to obtain materials with acid?base properties. A series of pyrrole derivatives were synthesized using a suitable procedure under solvent-free conditions. Using the alumina-supported material, more complex pyrrole derivatives can be obtained through a tandem one-pot process that involves the formation of 2-amino-3-cyano 4-H-chromenes by a multicomponent reaction and their subsequent conversion to pyrrole using a Paal?Knorr reaction.