Amide bonds absorb in the region of about 190 to 240 nm, so could using UV-C light conceivably cleave the amide bond?
Also I don't think this reaction is as simple as putting vyvanase powder under a UV-C lamp because the reaction intermediates probably need to be stabilized by a proper solvent or something, correct? What would the intermediates likely be, and what solvent would likely help?
Obviously the easiest way to get the desired product is probably simple hydrolysis, as there are not really any other hydrolyzable function groups on the starting material apart from the amide C-N bond. So this is mainly a theoretical question.