Synthesis of cyclic bis- and trismelamine derivatives and their complexation properties with barbiturates
作者:Shin-ichi Kondo、Tomohiro Hayashi、Yuichi Sakuno、Yoko Takezawa、Takashi Yokoyama、Masafumi Unno、Yumihiko Yano
DOI:10.1039/b615537e
日期:——
Cyclic bis- and trismelamine derivatives were prepared from cyanuric chloride by stepwise substitutions with appropriate amines. The complexation abilities of these melamine derivatives with barbituric acid derivatives were evaluated by UV-vis spectroscopy and (1)H NMR. The structure was also confirmed by X-ray crystallography. Both the acyclic and the cyclic bismelamine derivatives formed a 1 : 1
通过用适当的胺逐步取代,由氰尿酰氯制备环状的双和三蜜胺衍生物。这些三聚氰胺衍生物与巴比妥酸衍生物的络合能力通过紫外-可见光谱和(1)1 H NMR进行评估。还通过X射线晶体学证实了该结构。无环的和环状的双蜜胺衍生物都通过与巴比妥酸衍生物的六个氢键形成1:1络合物。van't Hoff对双三聚氰胺与巴比妥酸衍生物络合的分析表明,与无环双三聚氰胺的络合相比,环状双三聚氰胺的络合在熵上有利,而在焓上则较不受欢迎。