(3S)-3-hydroxyquinidine, the major biotransformation product of quinidine. Synthesis and conformational studies. X-Ray molecular structure of (3S)-3-hydroxyquinidine methanesuiphonate
作者:F. Ivy Carroll、Philip Abraham、Kevan Gaetano、S. Wayne Mascarella、Ronald A. Wohl、Joan Lind、Karl Petzoldt
DOI:10.1039/p19910003017
日期:——
(3S)-3-Hydroxyquinidine, the major metabolite of the Cinchona alkaloid quinidine, was prepared by synthetic chemical modification or microbial oxidation of quinidine. The structure of this metabolite has been demonstrated to be (3S)-3-hydroxyquinidine by H-1 and C-13 NMR, IR, UV and mass spectral analysis. Previously published comparisons of the C-13 NMR spectra of 3-hydroxyquinidine and model compounds were used to establish the absolute stereochemistry of the metabolite (see ref. 8). This assignment has been verified by single-crystal X-ray analysis of (3S)-3-hydroxyquinidine methanesulphonate. The gas- and solution-phase conformational preference of the metabolite derived from molecular modelling and NOE studies are compared with the conformation observed by X-ray crystallography.
(3S)-3-羟基金鸡纳丁是金鸡纳碱类药物金鸡纳丁的主要代谢物,可以通过化学合成或微生物氧化金鸡纳丁来制备。通过氢-1和碳-13核磁共振(NMR)、红外(IR)、紫外(UV)光谱以及质谱分析,证实了该代谢物的结构为(3S)-3-羟基金鸡纳丁。先前发表的3-羟基金鸡纳丁与模型化合物的碳-13核磁共振光谱比较,被用于确定代谢物的绝对立体化学(参见参考文献8)。这一结论通过(3S)-3-羟基金鸡纳丁甲磺酸盐的单晶X射线分析得到了验证。探讨了代谢物在气相和溶液中的构象偏好,这些结果源自分子建模和核 Overhauser 效应(NOE)研究,与该代谢物通过X射线晶体学观察到的构象进行了对比。