(s)-多沙唑嗪的核磁共振理论和实验研究

报道了(s)-多沙唑嗪的1H、13C、DEPT、1H-1H COSY等的NMR波谱数据, 并对1H、13C NMR信号进行了指认. (s)-多沙唑嗪分子中含有9个季碳原子, 其中绝大部分通过常规实验的方法难以指认. 应用量子化学规范不变原子轨道(GIAO)的Becke-3-Lee-Yang-Parr(B3LYP)和Hartree-Fock(HF)方法, 分别在6-21G基组下计算了标题化合物的13C NMR化学位移值. 计算结果表明, 理论计算数据与实验结果吻合较好, 可以帮助对(s)-多沙唑嗪季碳原子NMR位移信号进行指认.

Experimental and Theoretical NMR Study of (s)-Doxazosin

1H, 13C, DEPT, 1H-1H COSY NMR and HSQC NMR spectra of (s)-doxazosin were reported. All the 1H and 13CNMRdata were assigned. There were 9 quaternaryCatoms in the (s)-doxazosin molecule, and most of them were difficult to be identified only by experimental data. 13C NMR chemical shifts of (s)-doxazosin were calculated by means of the Hartree-Fock (HF) and Becke-3-Lee-Yang-Parr (B3LYP) density functional theory methods with 6-21G basis sets respectively. Comparison between the experimental and the theoretical results indicated that both methods had good correlation. This was helpful to assign the NMR shifts of quaternary C atoms.