We next explored the scope of ethenesulfonyl fluorides and the results are summarized in Table . A variety of electron-withdrawing, -neutral and -donating substituents substituted β-aryl ethenesulfonyl fluorides smoothly underwent the tandem reaction to produce the corresponding products in high yields (3r-3ab). In addition, varied positions of the substituents can be well tolerated for the reaction (3ac-3an). However, when phenolic hydroxy group substituted ethenesulfonyl fluoride was used to react with allyl ketone 1a, the reaction was complex and no desired product was obtained (3ao). We assumed that the phenolic hydroxy group can undergo SuFEx click reaction or other side reactions, which restricted the desired tandem annulation reaction. In contrast, when the phenolic hydroxy group was protected with -SO 2 F group, the desired product was obtained in 84% yield (3aa). Naphthyl-substituted ethenesulfonyl fluorides were suitable reactants for the reaction, affording the corresponding sultones in excellent yields (3ap and 3aq). Heteroaryl substituted ethenesulfonyl fluorides can also undergo this reaction, albeit with relatively low yields (3ar-3at). The reaction involving ESF only gives 38% yield (3au). The structure of 3ab and 3au were determined via X-Ray crystallographic analysis.