This contribution described the chemoselective reduction of secondary carboxamides to aldimines. To perform such challenging transformation, we reported a catalyzed hydrosilylation using Fe(CO)4(IMes) [IMes=1,3-bis (2,4,6-trimethylphenyl) imidazol-2ylidene] as the catalyst, diphenylsilane as the reductant under UV irradiation (365 nm) at room temperature for 16 h. Aldimines were then obtained, after a basic quench, in 40-83% isolated yields. This transformation was unprecedented at iron.