Description Application Benzimidazolyltetrafluoroethanesulfonyl fluoride serves as a moderately reactive benzimidazolyltetrafluoroethanesulfonylation reagent. Fluoroalkylsulfonylation of the amine nitrogen greatly lowers the pKa value of the N-H and can be used to modulate the behaviour of the drug candidate or build additional molecular complexity around the highly acidic fluoroalkylsulfonamide nitrogen. Other Notes Technology Spotlight: Fluoroalkylation: Expansion of Togni Reagents Legal Information Product of CF Plus Chemicals.