作者:A. R. A. Palmans、J. A. J. M. Vekemans、E. W. Meijer
DOI:10.1002/recl.19951140605
日期:——
Various di- and monoacylated 2,2′-bipyridine-3,3′-diamines (amides 1a-f, 8, 9, ureas 1g-h, 8b and acylureas 1i-j) have been synthesized and characterized. All molecules show strong intramolecular hydrogen bonding between the acyl NH of one ring and the pyridine N-1 of the other (and vice versa), as is deduced from the low field 1H NMR resonances of the acyl NH protons, which range from δ 12.6 to 15
合成并表征了各种二酰基和单酰基化的2,2'-联吡啶-3,3'-二胺(酰胺1a-f,8、9,脲1g-h,8b和酰脲1i-j)。所有分子均显示一个环的酰基NH与另一个环的吡啶N-1之间的强分子内氢键(反之亦然),这是由酰基NH质子的低场1 H NMR共振推导得出的,其范围为δ在CDCl 3中为12.6至15.0 ppm 。(二)酰化的2,2'-联吡啶-3,3'-二胺的二级结构的性质已使用包括可变温度1 H NMR和CD光谱在内的多种技术进行了研究。