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

Author(s)

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

• Document type: Journal article
• Source: CHEMICAL PAPERS; v. 68, n. 11, p. 8-pg., 2014-11-01.

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. (AU)

• FAPESP's process: 12/23821-7 - Synthesis of 14-Aryl-14H-dibenzo[a,j]xanthenes and 4-Aryl-3,4-dihydro-benzo[f]coumarins promoted by niobium pentachloride, with potential application in the preparation of dyes-sensitizers for use in Grätzel devices.
• Grantee: Aloisio de Andrade Bartolomeu
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 13/08697-0 - Studies about the use niobium pentachloride in multicomponent reactions toward the synthesis of dye-sensitizers with potential application in photoelectrochemical devices of Grätzel
• Grantee: Luiz Carlos da Silva Filho
• Support Opportunities: Regular Research Grants