“…[10] In some cycloadditions with furan derivatives,F riedel-Crafts (FC) alkylation products were also observed as minor products.E xperiments and computational studies are consistent with an activated epoxide or aziridine as the dienophile,which undergoes cycloaddition to effectively transfer chirality to the cycloadduct. [11] When these aziridinyl enolsilanes were subjected to intermolecular reactions with arenes,F Calkylation products were produced, as expected. [12] However,wewere intrigued to find that in the triethylsilyl triflate (TESOTf) catalyzed reaction of the benzene-tethered epoxy enolsilane 1a,i n addition to the FC product, 3a,t he dearomatized (4+ +3) cycloadduct 2a,r esulting from ipso attack, was observed under these mild reaction conditions (Scheme 1).…”