series of molybdenum(0), (I) and (II) complexes ligated by different PNP and NNN pincer ligands were synthesized and structurally characterized. Along with previously described Mo−PNP complexes Mo‐1 and Mo‐2, all prepared compounds were tested in the catalytichydrogenation of aromatic nitriles to primary amines. Among the applied catalysts, Mo‐1 is particularly well suited for the hydrogenation of electron‐rich
bromides and chlorides with aqueous ammonia and hydroxylamine was achieved in continuous flow to produce primary ammonium salts and hydroxylamines in high yields. An in-line workup was designed to isolate the corresponding primary amine, which was also telescoped in further reactions, such as acylation and Paal–Knorr pyrrole synthesis. Monosubstituted epoxides are also compatible with the reaction conditions
This study demonstrates selectivehydrogenation of nitriles to produce primary amines using a well-defined nanocrystalline nickel carbide (nano-Ni3C) catalyst. The aluminum-oxide-supported nano-Ni3C (nano-Ni3C/Al2O3) showed high catalytic activity and broad substrate scope, with various (hetero)aromatic and aliphatic nitriles affording the corresponding primary amines, even under 1 bar of H2.
本研究展示了使用明确的纳米晶碳化镍(纳米 Ni 3 C)催化剂对腈进行选择性加氢来生产伯胺。氧化铝负载的纳米Ni 3 C(纳米Ni 3 C/Al 2 O 3 )表现出高催化活性和广泛的底物范围,即使在1以下,各种(杂)芳香族和脂肪族腈也能提供相应的伯胺。 H 2条。