Benzonitriles and cyanofluorenes have been rapidly obtained via the [3 + 3] benzannulation of readily available alkynones and α-cyanocrotonates using KOtBu as the only reagent and EtOH (and CO2) is the only by-product.
苯腈和
氰基
芴已通过易得的炔酮和α-
氰基
巴豆酸酯的[3 + 3]苯环化反应快速获得,其中唯一试剂为KOtBu,唯一副产物为EtOH(和
CO2)。