 The discovery of estrifluoromethyl diaryl sulphonium salts by Jaguipolsky and his colleagues was a major breakthrough in the field of trifluoromethalation. This led to the development of several electrophilic trifluoromethalating reagents, including those from the groups of Umamoto, Shreve, Adachi, Magner, Tani and Shibata. These reagents are now commercially available and widely used in the pharmaceutical, agricultural, and material industries. This article was authored by Norio Shibata, Andre Matzniev, and Dominique Ahard.