one-pot condensation of β-ketoesters and substituted phenols in the presence of 1-
chloromethyl-4-fluoro-1, 4-diazoniabicyclo [2.2. 2] octane bistetrafluoroborateis
(Selectfluor™ F-TEDA-BF 4) as catalyst under solvent free reaction conditions was
experimented. The application of ultrasonic irradiation improved the yields and reduced the
reaction times. The use of selectfluor catalyst is feasible because of its stability, commercial …