Triflic anhydride ((CF3SO2)2O ,CAS:358-23-6 ) is widely used in various industrial fields due to its strong acidity and high reactivity. Its major applications include the following: 1. Sulfonylation Reactions · Function : Triflic anhydride serves as an efficient reagent for introducing trifluoromethanesulfonyl ( −CF3SO2 ) groups, widely used in the synthesis of triflates and trifluoromethanesulfonamides. · Applications : o Synthesis of triflates (e.g., trifluoromethanesulfonate esters from phenols or alcohols) for pharmaceutical and organic electronics applications. o Conversion of hydroxyl (−OH) or amino (−NH2) groups into stable trifluoromethanesulfonyl derivatives, especially useful in protective group chemistry. 2. Pharmaceuticals and Fine Chemicals Synthesis · Function : Triflic anhydride plays a critical role in the production of key intermediates for pharmaceutical applications. · Applications : o Synthesis of sulfonat...