Synthesis and Luminescence of 14-Aryl-or Alkyl-14H-dibenzo[a,j]xanthenes Catalyzed by 2-1'-Methylimidazolium-3-yl-1-ethyl Sulfate

Abstract A facile and efficient synthesis of 14-aryl or alkyl-14H-dibenzo[a,j]xanthenes has been accomplished by treatment of β-naphthol with aryl or alkyl aldehydes catalyzed by 2-1′-methylimidazolium-3-yl-1-ethyl sulfate in ionic liquid [BMIM][BF4] at 80°C. The luminescence of products was studied in detail.