Togni reagent I (also named as alcohol CF3-reagent) is the first hypervalent iodine-CF3 reagent that was commercialized and well-received for electrophilic Trifluoromethylation. The Togni reagent is bench-stable,easy to handle, and can be exposed to moist air for short periods of time without any apparent alteration. It is clearly much better soluble in organic solvents (even in pentane) than its analogue.
Electrophilic trifluoromethylation of arenes and N-heteroarenes using hypervalent iodine reagents. 
Electrophilic Trifluoromethylation by Use of Hypervalent Iodine Reagents. 
Why does Togni's reagent I exist in the high-energy hypervalent iodine form? Re-evaluation of benziodoxole based hypervalent iodine reagents. 
Magnesium-Catalyzed Electrophilic Trifluoromethylation: Facile Access to All-Carbon Quaternary Centers in Oxindoles.