Synthesis and characterization of heterocyclic substituted fluoran compounds

摘要

New quinazolinone-substituted fluoran compounds were synthesized by reaction of keto acid, 2'-carboxy-2-hydroxy-4-N-pyrrolidinylbenzophenone with different quinazolinone derivatives in the presence of conc, sulphuric acid. All the synthesized fluoran compounds were characterized by spectroscopic methods (IR, ~1H-NMR and UV-visible spectroscopy) and elemental analysis. The fluoran compounds are colourless or nearly colourless and develop colour on contact with electron-accepting compounds.