Tetrandrine is a bisbenzytehahydroisoquinoline alkaloid. Its structure is very complex and the preparation of labeled derivatives is difficult. We have prepared 3H-tetrandrine using the tritium gas exposure method.1 This method produces many fragments which make isolation and purification of small quantities difficult. We investigated these fragments of unlabeled d-tetrandrine and found almost all contain one to several hydroxide groups. Using this information, we designed a two-step paper chromatography method for isolation and purification of 3H-Tetrandrine. This method involves the application of a pH 4.7 Na2HPO4-citric acid buffer to the paper to block the migration of hydroxide group fragments of tetrandrine. 3H-tetrandrine was successfully with a radiochemical purity of 90%.
四氢
哌啶是一种双苯
氟氢
异喹啉生物碱。它的结构非常复杂,标记衍
生物的制备难度较大。我们使用氚气暴露法成功制备了3H-四氢
哌啶。该方法产生了许多片段,使得小量的分离和纯化变得困难。我们研究了未标记的d-四氢
哌啶片段,发现几乎所有片段都含有一个到多个羟基。利用这一信息,我们设计了一种两步纸层析法用于3H-四氢
哌啶的分离和纯化。该方法涉及在纸上应用pH 4.7的Na2HPO4-
柠檬酸缓冲液,以阻止四氢
哌啶的羟基片段的迁移。最终成功获得3H-四氢
哌啶,放射
化学纯度达到90%。