The synthesis and characterization of the triphenylamine-capped cyclophane 3 are described. It proved to be a conformationally rigid molecular propeller, with an inwardly pyramidalized, unreactive amine.
The synthesis and characterization of the triphenylamine-capped cyclophane 3 are described. It proved to be a conformationally rigid molecular propeller, with an inwardly pyramidalized, unreactive amine.
Sterically congested macrobicycles with heteroatomic bridgehead functionality
作者:Jie Zong、Joel T. Mague、E. Celeste Welch、Isaac M.K. Eckert、Robert A. Pascal
DOI:10.1016/j.tet.2013.10.018
日期:2013.12
two-atom bridges has been synthesized. The bridgeheadfunctional groups include phosphines in combination with amines, hydrosilanes, methylsilanes, and ethoxysilanes. Computational studies accurately predicted that when the bridgehead substituents are small (lone pairs or protons), an in,in bridgehead stereochemistry is strongly favored, but larger bridgehead substituents favor the formations of in,out
合成了一系列由两个三原子桥连接的三芳基帽组成的环环烷。桥头官能团包括与胺,氢硅烷,甲基硅烷和乙氧基硅烷结合的膦。计算研究准确地预测,当桥头取代基较小时(孤对或质子),强烈建议在桥头立体化学中使用in ,in,但较大的桥头取代基则有利于in in ,out立体异构体的形成。讨论了这些化合物的X射线结构,光谱和反应性,以及其中一种环烷拆分为纯对映体的方法。
An <i>in-</i>Triphenylaminophane
作者:Shyam Sathyamoorthi、Joel T. Mague、Robert A. Pascal
DOI:10.1021/ol3014073
日期:2012.7.6
The synthesis and characterization of the triphenylamine-capped cyclophane 3 are described. It proved to be a conformationally rigid molecular propeller, with an inwardly pyramidalized, unreactive amine.