作者:Gebhard Haberhauer、Eugen Drosdow、Thomas Oeser、Frank Rominger
DOI:10.1016/j.tet.2007.11.098
日期:2008.2
The synthesis of westiellamide analogues, wherein the oxazoline units are replaced by oxazole or thiazole units, is presented. The structures of these analogues, and also of an imidazole-based analogue, were investigated using X-ray diffraction and DFT-based molecular modelling calculations. We could show that the oxazole-based peptide is almost planar, whereas the thiazole and the imidazole cyclic
提出了其中甲恶唑啉单元被恶唑或噻唑单元代替的西乙酰胺类似物的合成。使用X射线衍射和基于DFT的分子模型计算研究了这些类似物以及基于咪唑的类似物的结构。我们可以证明基于恶唑的肽几乎是平面的,而噻唑和咪唑环肽则具有视锥状结构。此外,我们可以证明系统的灵活性主要取决于唑结构单元的类型。如果使用含恶唑的环肽,则支架具有几乎为平面的结构;如果没有,则为支架。然而,将支架弯曲成锥形结构需要高能量。含咪唑的环肽表现出互补的行为: