Novel rigid chiral macrocyclic dioxopolyamines derived from l-proline as chiral solvating agents for carboxylic acids
作者:Xuemei Yang、Xiaojun Wu、Maohai Fang、Quan Yuan、Enqin Fu
DOI:10.1016/j.tetasy.2004.07.016
日期:2004.8
NMR was employed to investigate the chiral recognition ability of two novel l-proline derived rigid chiral macrocyclic dioxopolyamines, (12S)-1,4,7,10-tetraazadicyclo[10.3.0]pentadecane-3,11-dione 1 and (8S,18S)-1,4,10,13,16-pentaazatricyclo[16.3.0.04,8]heneicosane-9,17-dione 2, the latter of which is newly synthesized. The crystal structures of the two macrocyclic compounds were determined by X-ray
1 H NMR用于研究两种新型的l-脯氨酸衍生的刚性手性大环二氧杂多胺((12 S)-1,4,7,10-四氮二环[10.3.0] pentadecane-3,11-dione 1的手性识别能力(8 S,18 S)-1,4,10,13,16-五氮杂三环[16.3.0.0 4,8 ] heneicosane-9,17-dione 2,后者是新合成的。通过X射线单晶结构分析确定两种大环化合物的晶体结构。乔布图表明化合物1与(R)-或(S)-扁桃酸形成1:1瞬时络合物,而化合物2与上面的两个客人组成一个1:2的瞬间复合体。通过非线性最小二乘拟合法确定化合物1与(R)-和(S)-扁桃酸的缔合常数。对于我们选择的外消旋羧酸的对映异构体,两个大环均表现出良好的手性识别能力。结果表明,大环dioxopolyamine Ç 2对称性具有比的对映异构体更好识别能力Ç 1对称性。