The structure of 2-amino-4-aryl-1-arylideneaminoimidazoles in DMSO -d6 solution was investigated by means of NMR spectroscopic methods (1H, 13C, 15N). From these data the ( E )-configuration at the excocyclic C=N bond and a strong preference for the conformer with the imidazole H-5 and the N=CH proton being spatially close (s- trans regarding the N–N bond) can be concluded. Reaction of the title compounds
通过NMR光谱法(1 H,13 C,15 N)研究了
DMSO -d 6溶液中的2-
氨基-4-芳基-1-芳基亚
氨基
氨基
咪唑的结构 。根据这些数据,在环外C = N键处的( E )-构型以及对带有
咪唑H-5和N = CH质子在空间上接近(s- trans 关于N–N键)可以得出结论。标题化合物与
乙酸酐的反应导致2-
氨基上的单酰基和二酰基化,而新
戊酸酐处理仅得到相应的单酰基产物。单酰化和二酰化产物表现出与母体化合物相似的构型和构象性质。