Synthesis, characterization of calix[5]azulene and its complexation with pyridinium salts
作者:Yu Jin、Kengo Akagawa、Toshiki Mutai、Isao Yoshikawa、Kazuaki Kudo
DOI:10.1016/j.tet.2021.132146
日期:2021.5
molecules resemble to each other. The complexation behavior of calixazulenes with using pyridinium salts were investigated and the respective binding constants were determined using non-linear fitting of the spectral data from UV–vis absorption titration studies. CA5 showed higher affinity toward pyridinium salts compared to calix[4]azulene, and unusual preference to bromide salt over chloride was observed
在硫酸存在下,由双(愈创木烯-3-基)甲烷和a合成了杯[5]](CA5)。从不同的溶剂系统中收集了三个晶体结构,其中CA5分子的构象彼此相似。研究了杯形唑啉与吡啶鎓盐的络合行为,并使用紫外-可见吸收滴定研究的光谱数据进行非线性拟合,确定了各自的结合常数。与杯[4] azulene相比,CA5对吡啶鎓盐具有更高的亲和力,并且观察到对溴化物盐的偏爱高于氯化物。此外,对于CA5的络合,观察到对吡啶环的更明显的取代作用。。通过DFT计算研究了客体-客体复合物的可能结构。