An efficient fluorination of β-ketosulfones promoted by a room-temperature ionic liquid at ambient conditions under ultrasound irradiation using SelectfluorTM F-TEDA-BF4

The fluorination reaction involving aβ-ketosulfones by SelectfluorTMwas efficiently promoted by the ionic liquid,[Hbim]BF4(EL) as a reaction medium with methanol as co-solvent at room temperature under ultrasonic irradiation to afford the corresponding mono and difluoro-β-ketosulfones in excellent yields.The advantages of this method include among others the use of a recyclable, non-volatile ionic liquid,which promotes this protocol under room temperature without the requirement of any added catalyst under ultrasonic irradiation.