The rotameric (R*,S*)- and (R*,R*)-biaryl-3,3′-diphthalides of polyphenylene series
作者:Tagir A. Yangirov、Akhnef A. Fatykhov、Elvira A. Sedova、Leonard M. Khalilov、Ekaterina S. Meshcheryakova、Sergey P. Ivanov、Sergey N. Salazkin、Vladimir A. Kraikin
DOI:10.1016/j.tet.2019.01.043
日期:2019.3
A wide range of diastereomeric pairs of biaryl-3,3′-diphthalides with aromatic (heteroaromatic) substituents of polyphenylene series (including halogen substituted) was synthesized. All of them were separated and characterized by the methods of X-ray analysis, HPLC, IR-, 1H and 13C NMR spectroscopy. It was determined that solubility, tendency to adsorption and related to it retention times, chemical
合成了具有聚亚苯基系列的芳族(杂芳族)取代基(包括被卤素取代)的联芳-3,3'-邻苯二甲酸酯的各种非对映异构体对。通过X射线分析,HPLC,IR-,1H和13C NMR光谱法对所有这些物质进行分离和表征。已确定,首先由两个相邻的强极性邻苯二甲酸酯基团的立体电子效应确定联芳基3,3'-二邻苯二甲酸酯非对映异构体的溶解度,吸附趋势及其保留时间,等效氢和碳原子的化学位移。 。结果表明,无论是在结晶相中还是在溶液中,所有的二邻苯二甲酸酯,无论其取代基的化学结构如何,均以具有顺式或间平面(手性形式)的稳定的旋转异构体存在。反或反平面(介观形式)构象。