In this article the crystal structures of the starting material TZ-5 and the key intermediate TZ-6 of temozolomide (TZ-7), an anticancer therapeutic agent, are presented, together with their spectroscopic and thermal characteristics. Both compounds crystallize in the triclinic P-1 space group. X-ray crystallography studies proved that the compound TZ-6 exists as a monohydrate. A complete structural assignment was obtained for the signals in the 1H-, 13C- and 15N-nuclear magnetic resonance spectra and the structures were confirmed by Fourier-Transform infrared and Raman spectroscopy. The article describes the importance of the high purity of TZ-6 during the small-scale plant production of TZ-7 in a desired polymorphic form III with the purity higher than 99.50%, according to an HPLC method.
本文介绍了抗癌治疗剂
替莫唑胺(T
Z-7)的起始原料 TZ-5 和关键中间体 TZ-6 的晶体结构,以及它们的光谱和热学特征。这两种化合物都在三菱 P-1 空间群中结晶。X 射线晶体学研究证明,化合物 TZ-6 以一
水合物的形式存在。1H、13C 和 15N 核磁共振光谱中的信号得到了完整的结构分配,傅立叶变换红外光谱和拉曼光谱也证实了其结构。文章介绍了高纯度 TZ-6 在小规模工厂生产 T
Z-7 过程中的重要性,根据 HPLC 方法,T
Z-7 的理想多晶型 III 的纯度高于 99.50%。