Synthesis and Characterization of Some New C2 Symmetric Chiral Bisamide Ligands Derived from Chiral Feist’s Acid
作者:Abdullah M. A. Al Majid、Mohammad Shahidul Islam、Zeid Al-Othman、Ahlam F. Al-Salhoob、Assem Barakat
DOI:10.3390/molecules17055550
日期:——
2-dicarboxylic acid from an 8:2 mixture of tert-butanol and water, using (R)-(+)-α-methylbenzyl amine as a chiral reagent. This process is reproducible on a large scale. All these new synthesized chiral ligands were characterized by 1H-NMR, 13C-NMR, IR, and mass spectrometry, as well as elemental analysis and their specific rotations were measured. These new classes of C2 symmetric chiral bisamide ligands
半稳定的手性 C2 对称双齿取代酰胺配体 (1R,2R)-5a-d 和 (1S,2S)-6a-d 由 (1R,2R)-(+)-3-亚甲基环丙烷以定量收率合成1,2-二羧酸(1R,2R)-3和(1S,2S)-(-)-3-亚甲基-环丙烷-1,2-二羧酸(1S,2S)-3,分别分两步。手性 Feist 酸 (1R,2R)-3 和 (1S,2S)-3 通过从 8 中拆分反式-(±)-3-亚甲基-环丙烷-1,2-二羧酸获得,具有良好的异构纯度: 2 叔丁醇和水的混合物,使用 (R)-(+)-α-甲基苄胺作为手性试剂。该过程可大规模重现。所有这些新合成的手性配体均通过 1H-NMR、13C-NMR、IR 和质谱以及元素分析和比旋光度进行了表征。