通过运用1H-1HCOSY(1H—1H COrrelation SpectroscopY)、TOCSY(TOtal Correlation SpectroscopY)、HSQC(Heteronuclear Single Quantum Correlation)、HMBC(Heteronuclear Multiple Bond Correlation)、NOESY(Nuclear Overhauser Enhancement SpectroscopY)等多种二维核磁技术,对盐酸氯丙嗪(Chlorpromazine hydrochloride CPZ·HCI)在CDCl3、CD3COCD2和D2O三种溶剂中的1H、13CNMR谱进行了准确归属(重点集中于谱峰重叠程度较高的芳香族区域).实验表明:杂环上N与苯环存在部分共轭;在CDCl3、CD3COCD3中,侧链卷曲至芳环上方处于屏蔽区,且侧链上N为较稳定的四面体构型;比较了CPZ·HCl在不同溶剂与浓度下的1HNMR谱的变化,对文献中其核磁共振谱(特别是芳香区的谱峰)归属的争议作了解释.量子化学计算结果与实验结果相吻合.
The horn-and heteronuclear correlation spectroscopy techniques were used to make unambiguous assignments of 1H and 13C chemical shifts of chlorpromazine hydrochloride (CPZ · HCl), a well-known psychotropic agent. By comparing of the completely assigned spectra of CPZ ·HCl in different solvents (acetone-d6, chloroform-d and deuterium oxide), it was concluded that the aggregation state of CPZ · HCl differs drastically in different solutions. The data from NMR spectroscopy studies were combined with the results obtained by theoretical calculations to derive the side chain conformations of CPZ · HCl. It was shown that the side chains are in folded forms in acetone and chloroform solutions whereas they inclined to adopt an extended style in aqueous solution.