An efficient synthesis and resolution of (±)-1-(2-carboxymethyl-6-ethylphenyl)-1H-pyrrole-2-carboxylic acid has been developed for the preparation of novel optically active atropisomers. The ee values were measured by a 1H NMR spectroscopic method using quinidine as the chiral complexing agent. Absolute configurations of the separated enantiomers were determined using single crystal X-ray diffraction
                                    已经开发了一种有效的合成和拆分(±)-1-(2-羧甲基-6-
乙基苯基)-1H-
吡咯-2-羧酸的方法,用于制备新型旋光性阻转异构体。ee值是使用
奎尼丁作为手性络合剂通过1 H NMR光谱法测定的。分别使用对映体纯的二
羧酸的二钠盐和(R)-1-苯基
乙胺盐的单晶X射线衍射测量来确定分离的对映体的绝对构型。借助TD-DFT量子
化学计算对CD光谱进行分析,确认了构型的分配。