A novel synthetic pathway for paracyclophane receptors
摘要:
The synthesis of 1,4,7-trimethyl-1,7-bis(p-(alpha-chloromethyl)benzyl)-1,4,7-triazaeptane is reported. This compound behaves as a versatile building block for the assembly of 1,4-dibenzo aza or oxa-aza macrocycles.
The synthesis of 1,4,7-trimethyl-1,7-bis(p-(alpha-chloromethyl)benzyl)-1,4,7-triazaeptane is reported. This compound behaves as a versatile building block for the assembly of 1,4-dibenzo aza or oxa-aza macrocycles.
Mono- and bi-nuclear copper(II) complexes with polyazacyclophane receptors containing two different binding sites
has been potentiometrically studied (298.1 K, 0.1 mol dm3 NMe4Cl aqueoussolution): L1 forms only a mononuclear complex, while L2 gives both mono- and bi-nuclear species in aqueoussolution. In the [CuL1]2+ complex the metal is co-ordinated by the three tertiary nitrogens of the N3 unit, while the N2O4 moiety shows a high tendency to protonation. These solution data are confirmed by the crystal structure
制备了大双环化合物1,4,7,-三甲基-19,22,28,31-四氧杂-1,4,7,14,23-五氮杂[9.25]-对环环烷(L 1)。它包含一个N 3和一个环状N 2 O 4亚基,通过对亚苯基间隔基连接。已经通过电位测量法研究了L 1(和L 2,其中N 2 O 4单元被N 5部分取代)的质子化。在pH 2以上的水溶液中,化合物L 1和L 2分别结合多达五个和六个质子。质子和13在不同pH值下的13 C NMR光谱可确定逐步质子化位点。考虑到[H 4 L 1 ] 4+,酸性质子位于苄基氮上。已经对L 1和L 2与铜(II)的配位关系进行了电位分析研究(298.1 K,0.1 mol dm 3 NMe 4 Cl水溶液):L 1仅形成单核络合物,而L 2给出单-和双-水溶液中的核种。在[CuL 1 ] 2+络合物中,金属与N 3的三个叔氮配位N 2 O 4部分显示出很高的质子化趋势。这些溶液数据由[Cu(HL