ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Efficient one-pot synthesis of 14-aryl-14H-dibenzo [a,j]xanthene derivatives promoted by niobium pentachloride

Aloisio de Andrade Bartolomeu, Manoel Lima de Menezes, and Luiz Carlos da Silva Filho

Department of Chemistry, Faculty of Sciences, Laboratory of Organic Synthesis and Processes (LaOSP), São Paulo State University (UNESP), 17033-360, Bauru, São Paulo, Brazil

E-mail: aloisio_andrade@fc.unesp.br

Abstract: A simple and efficient procedure for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthene derivatives through one-pot condensation of 2-naphthol with aryl aldehydes in the presence of niobium pentachloride is described. The reactions were carried out using 25 mole % of NbCl₅, at ambient temperature, and in acceptable reaction times, affording excellent yields of the products.

Keywords: niobium pentachloride – Lewis acid – one-pot condensation – 14-aryl-14H-dibenzo[a,j]xanthene derivatives

Full paper is available at www.springerlink.com.

DOI: 10.2478/s11696-014-0597-8

Chemical Papers 68 (11) 1593–1600 (2014)