“…Many of these reduction steps require the presence of a catalyst to activate the reducing agent [4], and transition-metals (such as Ru, Rh, Pd, Ag, Ir, Pt, and Au) have also been used extensively [5] in the preparation of active pharmaceutical ingredients (APIs) [6,7]. Despite its cost, Rh shows remarkable activity for such a reaction, as shown in the recent literature [8][9][10][11], and has the potential to be employed in robust hydrogenation catalysts with low metal loading. A Rh/Al 2 O 3 -catalyzed reductive amination of furfural and other aldehydes, especially those associated with biomass, was recently reported by Chatterjee, Kawanami, and coworkers using an aqueous solution of NH 3 [12].…”