Investigation on the flexibility of chiral tricyclic derivatives
作者:Maria Altamura、Paolo Dapporto、Antonio Guidi、Nicholas J. S. Harmat、Loïc Jierry、Elisa Libralesso、Paola Paoli、Patrizia Rossi
DOI:10.1039/b801569d
日期:——
In the perspective of generating libraries for broad screening purposes, the inversion barrier of enantiomeric conformers of various tricyclic compounds, characterized by a seven-membered ring featuring a lactam group with two aromatics condensed at its opposite sides, has been investigated by ab initio calculations and NMR spectroscopy. Solid-state structure characterizations by single-crystal X-ray
从产生用于广泛筛选目的的文库的角度出发,已通过从头算算研究了各种三环化合物的对映异构构象异构体的转化障碍,其特征在于具有内酰胺基的七元环,其内侧面有两个芳香族缩合的内酰胺基。核磁共振波谱。固态结构表征单晶X射线衍射也已经进行了。目的是评估是否从醚 到 硫化物 和 砜类衍生物,导致消旋化障碍发生变化。研究范围也扩大到了硫内酰胺同类物。研究了结构和电子效应对反演过程的能量学和证明的结构-性质关系的影响。结果表明,相对于相应的S / SO 2化合物,氧代衍生物的环转化更容易。还酰胺 相对于相应的硫代酰胺分子,分子总体上具有更小的屏障。
Uncommon crystal motif of brucine in its diastereomeric salt with (11-oxo-11H-dibenzo[b,f][1,4]thiazepin-10-yl)-acetic acid: a case of possible crystallization-induced dynamic resolution
The paper reports on the molecular and crystal structure of the diastereomeric salt (4) formed by the (11-oxo-11H-dibenzo[b,f][1,4]thiazepin-10-yl)-acetate (H−12) and the brucinium resolving agent. Experimental evidences suggest that the salt was obtained by a crystallization-induced dynamic resolution of the tricyclic compound 2, which seems to constitute the first example of successful application
本文报道了由(11-oxo-11 H -dibenzo [ b,f ] [1,4] thiazepin-10-yl)-acetate(H -1)形成的非对映体盐(4)的分子和晶体结构。2)和铍解析剂。实验证据表明,该盐是通过结晶诱导的三环化合物2的动态拆分而获得的,这似乎构成了将该技术成功应用于此类三轮车的第一个实例。与已发布的含有芥子碱(分子/离子)的化合物的结构数据进行系统比较表明,在4中解析阳离子组装在一个不寻常的宿主框架中。包含以下内容的固态结构的综述布鲁辛文献中可获得的β/ bruciumium部分提供了一些简单的规则,这些规则有助于排除/鉴定先验的超分子宿主(brucine分子/离子)构架。