Multicatalytic Tandem Reactions of 2-Alkynylbenzaldoximes with Isocyanides

An efficient tandem reaction of 2-alkynylbenzaldoximes with isocyanides co-catalyzed by silver triflate and bismuth triflate has been developed, which gives rise to the unexpected N-(isoquinolin-1-yl)formamides in good to excellent yields. The iodo- and bromo-containing products could be obtained as well by variation of the reaction conditions.