作者:Thomas Murray Fyles、Horace Luong
DOI:10.1039/b816648j
日期:——
A solid-phase synthesis protocol was used to prepare fifteen new linear tetra-, and penta-esters structurally related to an active lead compound. The structures were assembled from three types of hydroxyl protected building blocks: monoalkyl esters of hydroxyglutaric acid, ω-hydroxyacids, and α-hydroxymethylalkanoic acids. The standard methodology gave acceptable quantities of material free of small molecule impurities. Mass spectrometric analysis revealed the presence of deletions due to incomplete coupling, as well as additions and macrolactones due to partial acidic rearrangement on release from the solid-support. The amount of these impurities could be estimated from the 1H NMR spectra, and their implications for subsequent activity analysis are discussed.
采用固相合成协议制备了十五种新的线性四酯和五酯,这些化合物的结构与一种活性先导化合物相关。结构由三种类型的羟基保护构建块组装而成:羟基戊二酸的单烷基酯、ω-羟基酸和α-羟基甲基烷酸。标准方法得到了数量可接受、未含小分子杂质的材料。质谱分析揭示了因耦合不完全而导致的缺失,以及因从固体支持释放后的部分酸重排而引起的附加物和大环内酯的存在。通过1H NMR光谱可以估计这些杂质的数量,并讨论它们对后续活性分析的影响。