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(a) Representative selection of real-time 2D HSQC NMR spectra arising from the reaction of triflic anhydride, ketone (7) and acetonitrile-d3 shown in (b). Spectra show species (7, 11, 12 and 13) present in the aliphatic window range (1.54 - 2.87 ppm for 1H, 23.7 - 33.7 ppm for 13C) at key time points as the reaction progresses, depicted by arrows (red, blue, green and magenta respectively) (79).
