That is fine and all
but he is not proposing to do catalytic hydrogenation here is he?
and to some extent, the product may animate better than the ammonia, reacting with the ketone to produce not good things,
although if you swamp it, it should be OK
Generally, I have found it advantageous to hydrogenate catalytically with some acid (AcOH or HCl) around
to get cleaner reactions, especially for ze production of anilines from nitro's, as the free amines can blackify and it is shitty thereby, and/or your compound can glom onto the cat somewhat unless acid is there
I see it as an equilibrium thing, what is the most favorable conditions for forming the imine
b/c, NaBH
4 can reduce the ketone to the alcohol
pretty rapidly
Besides, Triacetoxy is the shit