Green catalytic synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes using recyclable mesoporous

TOA RIVERA; M. N. BLANCO; LUIS R. PIZZIO; GUSTAVO P. ROMANELLI

Green Chemistry Letters and Reviews

Taylor and Francis

Año: 2012 p. 1 - 5

1751-8253

A simple and efficient procedure has been developed for the preparation of aryl-14H-dibenzo[a,j]xanthenes by aone-pot condensation of 2-naphthol and aryl aldehydes, in the presence of mesoporous zirconia modified withtungstophosphoric acid (ZrTPA60BT100), to be used as a heterogeneous catalyst in a solvent-free medium usingconventional heating. The present approach offers the advantages of clean reaction, simple methodology, shortreaction time, and high yield. The reaction work-up is very simple and the catalyst can be easily separated fromthe reaction mixture and reused several times in subsequent reactions without appreciable loss of the catalyticactivity