NHCs generated from imidazolium and imidazolinium catalyzed the reaction in high yields ( With the optimized reaction conditions in hand, we than examined the scope of this SuFEx reaction. As shown in Table , both electron-withdrawing and electron-donating substituents substituted secondary alcohols reacted with aryl sulfonyl fluoride 1a to produce the corresponding products in high yields. In addition, varied positions of the substituents have no apparent effects on the reaction efficiency (3a-3m). Sterically hindered alcohols 2n and 2o participated in the reaction to give the corresponding products 3n and 3o in 83% and 66% yields, respectively. On the other hand, different substituted aryl sulfonyl fluorides underwent the SuFEx reaction with trifluoromethyl benzyl alcohol to afford the corresponding sulfonates in high yields (3p-3y). Similarly, different electronic properties and varied positions of the substituents have no obvious effects on the reaction yields. Difluoromethyl benzyl alcohols were also tested for this organocatalytic SuFEx click reaction and the results were summarized in Table . Under standard reaction conditions, different substituted aryl sulfonyl fluorides underwent SuFEx reaction with difluoromethyl benzyl alcohol 4 to give the corresponding sulfonates in moderate to high yields(5a-5i).