Methyl 2-[N-(2′-Pyridylmethyl)carbamyl]pyridine-6-carboxylate: A Precursor for Unsymmetrical Diamide Ligands
作者:Mery Napitupulu、Geoffrey A. Lawrance、Guy J. Clarkson、Peter Moore
DOI:10.1071/ch06310
日期:——
the ester group, a relatively poor donor, remaining unbound. The acid formed upon ester hydrolysis, hydrogen 2-[N-(2′-pyridylmethyl)carbamyl]pyridine-6-carboxylate (H22), has been isolated as the ammonium salt, and forms a 2:2 M:L dimer [CuII2(2)2(OH2)2] where each ligand binds to one copper through the amido group, its flanking pyridine groups, and to the other copper by the carboxylate group, to form
2-[N-(2'-吡啶基甲基)氨基甲酰基]吡啶-6-羧酸甲酯(H1),通过吡啶-2,6-二羧酸的甲基二酯和2-氨基甲基吡啶的1:1比例反应制备,可以通过充当三齿配体形成 1:2 M:L 配合物,如 [CoIII(1)2](ClO4) 的晶体结构分析所示,其中每个配体由酰胺基及其两个侧翼吡啶基团配位,酯基,一个相对较差的供体,保持未结合。酯水解形成的酸,氢 2-[N-(2'-吡啶基甲基)氨基甲酰基]吡啶-6-羧酸盐 (H22),已作为铵盐分离,并形成 2:2 M:L 二聚体 [CuII2 (2)2(OH2)2],其中每个配体通过酰胺基、其侧翼吡啶基团与一个铜结合,并通过羧酸根基团与另一个铜结合,形成一个包含两种金属的 10 元环。单酯 (H1) 与不同胺的向前反应导致可能以 2,6-二取代吡啶为中心但具有不对称臂的五齿配体,如合成 2-[N-(2'-吡啶基甲基)氨基甲酰基]- 6-[N-(2