Planar Chirality of Imidazole-Containing Macrocycles - Understanding and Tuning Atropisomerism
作者:Emilie Van Den Berge、Jiří Pospíšil、Tran Trieu-Van、Laurent Collard、Raphaël Robiette
DOI:10.1002/ejoc.201100805
日期:2011.11
The synthesis and characterization of imidazole-containing macrocycles displaying planar chirality has been achieved. HLPC and NMR studies revealed the crucial role of the alicyclic chain length in determining the rate of stereoisomerisation: 15- and 16-membered cyclic compounds are chiral whereas their larger-ringed analogues equilibrate rapidly at room temperature. Computational calculations are
已经实现了显示平面手性的含咪唑大环的合成和表征。HLPC 和 NMR 研究揭示了脂环链长度在决定立体异构化速率方面的关键作用:15 和 16 元环状化合物是手性的,而它们的大环类似物在室温下迅速平衡。计算计算与实验观察结果非常一致,使我们能够了解两种阻转异构体之间的构象平衡所涉及的机制和相互作用。通过半制备手性 HPLC 分离 15 元大环的两种对映异构体使我们能够研究手性对其生物活性的影响。